| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `crates/hir-ty/src/infer.rs`."><title>infer.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-77263533.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="hir_ty" data-themes="" data-resource-suffix="" data-rustdoc-version="1.94.0 (4a4ef493e 2026-03-02)" data-channel="1.94.0" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-b897f86f.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-7bab91a1.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-ffcac47a.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">hir_ty/</div>infer.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-4"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! Type inference, i.e. the process of walking through the code and determining |
| <a href=#2 id=2 data-nosnippet>2</a>//! the type of each expression and pattern. |
| <a href=#3 id=3 data-nosnippet>3</a>//! |
| <a href=#4 id=4 data-nosnippet>4</a>//! For type inference, compare the implementations in rustc (the various |
| <a href=#5 id=5 data-nosnippet>5</a>//! check_* methods in rustc_hir_analysis/check/mod.rs are a good entry point) and |
| <a href=#6 id=6 data-nosnippet>6</a>//! IntelliJ-Rust (org.rust.lang.core.types.infer). Our entry point for |
| <a href=#7 id=7 data-nosnippet>7</a>//! inference here is the `infer` function, which infers the types of all |
| <a href=#8 id=8 data-nosnippet>8</a>//! expressions in a given function. |
| <a href=#9 id=9 data-nosnippet>9</a>//! |
| <a href=#10 id=10 data-nosnippet>10</a>//! During inference, types (i.e. the `Ty` struct) can contain type 'variables' |
| <a href=#11 id=11 data-nosnippet>11</a>//! which represent currently unknown types; as we walk through the expressions, |
| <a href=#12 id=12 data-nosnippet>12</a>//! we might determine that certain variables need to be equal to each other, or |
| <a href=#13 id=13 data-nosnippet>13</a>//! to certain types. To record this, we use the union-find implementation from |
| <a href=#14 id=14 data-nosnippet>14</a>//! the `ena` crate, which is extracted from rustc. |
| <a href=#15 id=15 data-nosnippet>15</a> |
| <a href=#16 id=16 data-nosnippet>16</a></span><span class="kw">mod </span>autoderef; |
| <a href=#17 id=17 data-nosnippet>17</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>cast; |
| <a href=#18 id=18 data-nosnippet>18</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>closure; |
| <a href=#19 id=19 data-nosnippet>19</a><span class="kw">mod </span>coerce; |
| <a href=#20 id=20 data-nosnippet>20</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>diagnostics; |
| <a href=#21 id=21 data-nosnippet>21</a><span class="kw">mod </span>expr; |
| <a href=#22 id=22 data-nosnippet>22</a><span class="kw">mod </span>fallback; |
| <a href=#23 id=23 data-nosnippet>23</a><span class="kw">mod </span>mutability; |
| <a href=#24 id=24 data-nosnippet>24</a><span class="kw">mod </span>op; |
| <a href=#25 id=25 data-nosnippet>25</a><span class="kw">mod </span>opaques; |
| <a href=#26 id=26 data-nosnippet>26</a><span class="kw">mod </span>pat; |
| <a href=#27 id=27 data-nosnippet>27</a><span class="kw">mod </span>path; |
| <a href=#28 id=28 data-nosnippet>28</a><span class="kw">mod </span>place_op; |
| <a href=#29 id=29 data-nosnippet>29</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>unify; |
| <a href=#30 id=30 data-nosnippet>30</a> |
| <a href=#31 id=31 data-nosnippet>31</a><span class="kw">use </span>std::{cell::OnceCell, convert::identity, iter}; |
| <a href=#32 id=32 data-nosnippet>32</a> |
| <a href=#33 id=33 data-nosnippet>33</a><span class="kw">use </span>base_db::Crate; |
| <a href=#34 id=34 data-nosnippet>34</a><span class="kw">use </span>either::Either; |
| <a href=#35 id=35 data-nosnippet>35</a><span class="kw">use </span>hir_def::{ |
| <a href=#36 id=36 data-nosnippet>36</a> AdtId, AssocItemId, ConstId, DefWithBodyId, FieldId, FunctionId, GenericDefId, GenericParamId, |
| <a href=#37 id=37 data-nosnippet>37</a> ItemContainerId, LocalFieldId, Lookup, TraitId, TupleFieldId, TupleId, TypeAliasId, VariantId, |
| <a href=#38 id=38 data-nosnippet>38</a> expr_store::{Body, ExpressionStore, HygieneId, path::Path}, |
| <a href=#39 id=39 data-nosnippet>39</a> hir::{BindingAnnotation, BindingId, ExprId, ExprOrPatId, LabelId, PatId}, |
| <a href=#40 id=40 data-nosnippet>40</a> lang_item::LangItems, |
| <a href=#41 id=41 data-nosnippet>41</a> layout::Integer, |
| <a href=#42 id=42 data-nosnippet>42</a> resolver::{HasResolver, ResolveValueResult, Resolver, TypeNs, ValueNs}, |
| <a href=#43 id=43 data-nosnippet>43</a> signatures::{ConstSignature, EnumSignature, StaticSignature}, |
| <a href=#44 id=44 data-nosnippet>44</a> type_ref::{ConstRef, LifetimeRefId, TypeRef, TypeRefId}, |
| <a href=#45 id=45 data-nosnippet>45</a>}; |
| <a href=#46 id=46 data-nosnippet>46</a><span class="kw">use </span>hir_expand::{mod_path::ModPath, name::Name}; |
| <a href=#47 id=47 data-nosnippet>47</a><span class="kw">use </span>indexmap::IndexSet; |
| <a href=#48 id=48 data-nosnippet>48</a><span class="kw">use </span>intern::sym; |
| <a href=#49 id=49 data-nosnippet>49</a><span class="kw">use </span>la_arena::ArenaMap; |
| <a href=#50 id=50 data-nosnippet>50</a><span class="kw">use </span>rustc_ast_ir::Mutability; |
| <a href=#51 id=51 data-nosnippet>51</a><span class="kw">use </span>rustc_hash::{FxHashMap, FxHashSet}; |
| <a href=#52 id=52 data-nosnippet>52</a><span class="kw">use </span>rustc_type_ir::{ |
| <a href=#53 id=53 data-nosnippet>53</a> AliasTyKind, TypeFoldable, |
| <a href=#54 id=54 data-nosnippet>54</a> inherent::{AdtDef, IntoKind, Ty <span class="kw">as _</span>}, |
| <a href=#55 id=55 data-nosnippet>55</a>}; |
| <a href=#56 id=56 data-nosnippet>56</a><span class="kw">use </span>span::Edition; |
| <a href=#57 id=57 data-nosnippet>57</a><span class="kw">use </span>stdx::never; |
| <a href=#58 id=58 data-nosnippet>58</a><span class="kw">use </span>thin_vec::ThinVec; |
| <a href=#59 id=59 data-nosnippet>59</a> |
| <a href=#60 id=60 data-nosnippet>60</a><span class="kw">use </span>crate::{ |
| <a href=#61 id=61 data-nosnippet>61</a> ImplTraitId, IncorrectGenericsLenKind, PathLoweringDiagnostic, TargetFeatures, |
| <a href=#62 id=62 data-nosnippet>62</a> collect_type_inference_vars, |
| <a href=#63 id=63 data-nosnippet>63</a> db::{HirDatabase, InternedClosureId, InternedOpaqueTyId}, |
| <a href=#64 id=64 data-nosnippet>64</a> infer::{ |
| <a href=#65 id=65 data-nosnippet>65</a> coerce::{CoerceMany, DynamicCoerceMany}, |
| <a href=#66 id=66 data-nosnippet>66</a> diagnostics::{Diagnostics, InferenceTyLoweringContext <span class="kw">as </span>TyLoweringContext}, |
| <a href=#67 id=67 data-nosnippet>67</a> expr::ExprIsRead, |
| <a href=#68 id=68 data-nosnippet>68</a> }, |
| <a href=#69 id=69 data-nosnippet>69</a> lower::{ |
| <a href=#70 id=70 data-nosnippet>70</a> ImplTraitIdx, ImplTraitLoweringMode, LifetimeElisionKind, diagnostics::TyLoweringDiagnostic, |
| <a href=#71 id=71 data-nosnippet>71</a> }, |
| <a href=#72 id=72 data-nosnippet>72</a> method_resolution::{CandidateId, MethodResolutionUnstableFeatures}, |
| <a href=#73 id=73 data-nosnippet>73</a> mir::MirSpan, |
| <a href=#74 id=74 data-nosnippet>74</a> next_solver::{ |
| <a href=#75 id=75 data-nosnippet>75</a> AliasTy, Const, DbInterner, ErrorGuaranteed, GenericArg, GenericArgs, Region, |
| <a href=#76 id=76 data-nosnippet>76</a> StoredGenericArgs, StoredTy, StoredTys, Ty, TyKind, Tys, |
| <a href=#77 id=77 data-nosnippet>77</a> abi::Safety, |
| <a href=#78 id=78 data-nosnippet>78</a> infer::{InferCtxt, ObligationInspector, traits::ObligationCause}, |
| <a href=#79 id=79 data-nosnippet>79</a> }, |
| <a href=#80 id=80 data-nosnippet>80</a> traits::FnTrait, |
| <a href=#81 id=81 data-nosnippet>81</a> utils::TargetFeatureIsSafeInTarget, |
| <a href=#82 id=82 data-nosnippet>82</a>}; |
| <a href=#83 id=83 data-nosnippet>83</a> |
| <a href=#84 id=84 data-nosnippet>84</a><span class="comment">// This lint has a false positive here. See the link below for details. |
| <a href=#85 id=85 data-nosnippet>85</a>// |
| <a href=#86 id=86 data-nosnippet>86</a>// https://github.com/rust-lang/rust/issues/57411 |
| <a href=#87 id=87 data-nosnippet>87</a></span><span class="attr">#[allow(unreachable_pub)] |
| <a href=#88 id=88 data-nosnippet>88</a></span><span class="kw">pub use </span>coerce::could_coerce; |
| <a href=#89 id=89 data-nosnippet>89</a><span class="attr">#[allow(unreachable_pub)] |
| <a href=#90 id=90 data-nosnippet>90</a></span><span class="kw">pub use </span>unify::{could_unify, could_unify_deeply}; |
| <a href=#91 id=91 data-nosnippet>91</a> |
| <a href=#92 id=92 data-nosnippet>92</a><span class="kw">use </span>cast::{CastCheck, CastError}; |
| <a href=#93 id=93 data-nosnippet>93</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use </span>closure::analysis::{CaptureKind, CapturedItem, CapturedItemWithoutTy}; |
| <a href=#94 id=94 data-nosnippet>94</a> |
| <a href=#95 id=95 data-nosnippet>95</a><span class="doccomment">/// The entry point of type inference. |
| <a href=#96 id=96 data-nosnippet>96</a></span><span class="kw">fn </span>infer_query(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, def: DefWithBodyId) -> InferenceResult { |
| <a href=#97 id=97 data-nosnippet>97</a> infer_query_with_inspect(db, def, <span class="prelude-val">None</span>) |
| <a href=#98 id=98 data-nosnippet>98</a>} |
| <a href=#99 id=99 data-nosnippet>99</a> |
| <a href=#100 id=100 data-nosnippet>100</a><span class="kw">pub fn </span>infer_query_with_inspect<<span class="lifetime">'db</span>>( |
| <a href=#101 id=101 data-nosnippet>101</a> db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, |
| <a href=#102 id=102 data-nosnippet>102</a> def: DefWithBodyId, |
| <a href=#103 id=103 data-nosnippet>103</a> inspect: <span class="prelude-ty">Option</span><ObligationInspector<<span class="lifetime">'db</span>>>, |
| <a href=#104 id=104 data-nosnippet>104</a>) -> InferenceResult { |
| <a href=#105 id=105 data-nosnippet>105</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"infer_query"</span>).entered(); |
| <a href=#106 id=106 data-nosnippet>106</a> <span class="kw">let </span>resolver = def.resolver(db); |
| <a href=#107 id=107 data-nosnippet>107</a> <span class="kw">let </span>body = db.body(def); |
| <a href=#108 id=108 data-nosnippet>108</a> <span class="kw">let </span><span class="kw-2">mut </span>ctx = InferenceContext::new(db, def, <span class="kw-2">&</span>body, resolver); |
| <a href=#109 id=109 data-nosnippet>109</a> |
| <a href=#110 id=110 data-nosnippet>110</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(inspect) = inspect { |
| <a href=#111 id=111 data-nosnippet>111</a> ctx.table.infer_ctxt.attach_obligation_inspector(inspect); |
| <a href=#112 id=112 data-nosnippet>112</a> } |
| <a href=#113 id=113 data-nosnippet>113</a> |
| <a href=#114 id=114 data-nosnippet>114</a> <span class="kw">match </span>def { |
| <a href=#115 id=115 data-nosnippet>115</a> DefWithBodyId::FunctionId(f) => { |
| <a href=#116 id=116 data-nosnippet>116</a> ctx.collect_fn(f); |
| <a href=#117 id=117 data-nosnippet>117</a> } |
| <a href=#118 id=118 data-nosnippet>118</a> DefWithBodyId::ConstId(c) => ctx.collect_const(c, <span class="kw-2">&</span>db.const_signature(c)), |
| <a href=#119 id=119 data-nosnippet>119</a> DefWithBodyId::StaticId(s) => ctx.collect_static(<span class="kw-2">&</span>db.static_signature(s)), |
| <a href=#120 id=120 data-nosnippet>120</a> DefWithBodyId::VariantId(v) => { |
| <a href=#121 id=121 data-nosnippet>121</a> ctx.return_ty = <span class="kw">match </span>EnumSignature::variant_body_type(db, v.lookup(db).parent) { |
| <a href=#122 id=122 data-nosnippet>122</a> hir_def::layout::IntegerType::Pointer(signed) => <span class="kw">match </span>signed { |
| <a href=#123 id=123 data-nosnippet>123</a> <span class="bool-val">true </span>=> ctx.types.types.isize, |
| <a href=#124 id=124 data-nosnippet>124</a> <span class="bool-val">false </span>=> ctx.types.types.usize, |
| <a href=#125 id=125 data-nosnippet>125</a> }, |
| <a href=#126 id=126 data-nosnippet>126</a> hir_def::layout::IntegerType::Fixed(size, signed) => <span class="kw">match </span>signed { |
| <a href=#127 id=127 data-nosnippet>127</a> <span class="bool-val">true </span>=> <span class="kw">match </span>size { |
| <a href=#128 id=128 data-nosnippet>128</a> Integer::I8 => ctx.types.types.i8, |
| <a href=#129 id=129 data-nosnippet>129</a> Integer::I16 => ctx.types.types.i16, |
| <a href=#130 id=130 data-nosnippet>130</a> Integer::I32 => ctx.types.types.i32, |
| <a href=#131 id=131 data-nosnippet>131</a> Integer::I64 => ctx.types.types.i64, |
| <a href=#132 id=132 data-nosnippet>132</a> Integer::I128 => ctx.types.types.i128, |
| <a href=#133 id=133 data-nosnippet>133</a> }, |
| <a href=#134 id=134 data-nosnippet>134</a> <span class="bool-val">false </span>=> <span class="kw">match </span>size { |
| <a href=#135 id=135 data-nosnippet>135</a> Integer::I8 => ctx.types.types.u8, |
| <a href=#136 id=136 data-nosnippet>136</a> Integer::I16 => ctx.types.types.u16, |
| <a href=#137 id=137 data-nosnippet>137</a> Integer::I32 => ctx.types.types.u32, |
| <a href=#138 id=138 data-nosnippet>138</a> Integer::I64 => ctx.types.types.u64, |
| <a href=#139 id=139 data-nosnippet>139</a> Integer::I128 => ctx.types.types.u128, |
| <a href=#140 id=140 data-nosnippet>140</a> }, |
| <a href=#141 id=141 data-nosnippet>141</a> }, |
| <a href=#142 id=142 data-nosnippet>142</a> }; |
| <a href=#143 id=143 data-nosnippet>143</a> } |
| <a href=#144 id=144 data-nosnippet>144</a> } |
| <a href=#145 id=145 data-nosnippet>145</a> |
| <a href=#146 id=146 data-nosnippet>146</a> ctx.infer_body(); |
| <a href=#147 id=147 data-nosnippet>147</a> |
| <a href=#148 id=148 data-nosnippet>148</a> ctx.infer_mut_body(); |
| <a href=#149 id=149 data-nosnippet>149</a> |
| <a href=#150 id=150 data-nosnippet>150</a> ctx.handle_opaque_type_uses(); |
| <a href=#151 id=151 data-nosnippet>151</a> |
| <a href=#152 id=152 data-nosnippet>152</a> ctx.type_inference_fallback(); |
| <a href=#153 id=153 data-nosnippet>153</a> |
| <a href=#154 id=154 data-nosnippet>154</a> <span class="comment">// Comment from rustc: |
| <a href=#155 id=155 data-nosnippet>155</a> // Even though coercion casts provide type hints, we check casts after fallback for |
| <a href=#156 id=156 data-nosnippet>156</a> // backwards compatibility. This makes fallback a stronger type hint than a cast coercion. |
| <a href=#157 id=157 data-nosnippet>157</a> </span><span class="kw">let </span>cast_checks = std::mem::take(<span class="kw-2">&mut </span>ctx.deferred_cast_checks); |
| <a href=#158 id=158 data-nosnippet>158</a> <span class="kw">for </span><span class="kw-2">mut </span>cast <span class="kw">in </span>cast_checks.into_iter() { |
| <a href=#159 id=159 data-nosnippet>159</a> <span class="kw">if let </span><span class="prelude-val">Err</span>(diag) = cast.check(<span class="kw-2">&mut </span>ctx) { |
| <a href=#160 id=160 data-nosnippet>160</a> ctx.diagnostics.push(diag); |
| <a href=#161 id=161 data-nosnippet>161</a> } |
| <a href=#162 id=162 data-nosnippet>162</a> } |
| <a href=#163 id=163 data-nosnippet>163</a> |
| <a href=#164 id=164 data-nosnippet>164</a> ctx.table.select_obligations_where_possible(); |
| <a href=#165 id=165 data-nosnippet>165</a> |
| <a href=#166 id=166 data-nosnippet>166</a> ctx.infer_closures(); |
| <a href=#167 id=167 data-nosnippet>167</a> |
| <a href=#168 id=168 data-nosnippet>168</a> ctx.table.select_obligations_where_possible(); |
| <a href=#169 id=169 data-nosnippet>169</a> |
| <a href=#170 id=170 data-nosnippet>170</a> ctx.handle_opaque_type_uses(); |
| <a href=#171 id=171 data-nosnippet>171</a> |
| <a href=#172 id=172 data-nosnippet>172</a> ctx.resolve_all() |
| <a href=#173 id=173 data-nosnippet>173</a>} |
| <a href=#174 id=174 data-nosnippet>174</a> |
| <a href=#175 id=175 data-nosnippet>175</a><span class="kw">fn </span>infer_cycle_result(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, <span class="kw">_</span>: salsa::Id, <span class="kw">_</span>: DefWithBodyId) -> InferenceResult { |
| <a href=#176 id=176 data-nosnippet>176</a> InferenceResult { |
| <a href=#177 id=177 data-nosnippet>177</a> has_errors: <span class="bool-val">true</span>, |
| <a href=#178 id=178 data-nosnippet>178</a> ..InferenceResult::new(Ty::new_error(DbInterner::new_no_crate(db), ErrorGuaranteed)) |
| <a href=#179 id=179 data-nosnippet>179</a> } |
| <a href=#180 id=180 data-nosnippet>180</a>} |
| <a href=#181 id=181 data-nosnippet>181</a> |
| <a href=#182 id=182 data-nosnippet>182</a><span class="doccomment">/// Binding modes inferred for patterns. |
| <a href=#183 id=183 data-nosnippet>183</a>/// <https://doc.rust-lang.org/reference/patterns.html#binding-modes> |
| <a href=#184 id=184 data-nosnippet>184</a></span><span class="attr">#[derive(Copy, Clone, Debug, Eq, PartialEq, Default)] |
| <a href=#185 id=185 data-nosnippet>185</a></span><span class="kw">pub enum </span>BindingMode { |
| <a href=#186 id=186 data-nosnippet>186</a> <span class="attr">#[default] |
| <a href=#187 id=187 data-nosnippet>187</a> </span>Move, |
| <a href=#188 id=188 data-nosnippet>188</a> Ref(Mutability), |
| <a href=#189 id=189 data-nosnippet>189</a>} |
| <a href=#190 id=190 data-nosnippet>190</a> |
| <a href=#191 id=191 data-nosnippet>191</a><span class="kw">impl </span>BindingMode { |
| <a href=#192 id=192 data-nosnippet>192</a> <span class="kw">fn </span>convert(annotation: BindingAnnotation) -> BindingMode { |
| <a href=#193 id=193 data-nosnippet>193</a> <span class="kw">match </span>annotation { |
| <a href=#194 id=194 data-nosnippet>194</a> BindingAnnotation::Unannotated | BindingAnnotation::Mutable => BindingMode::Move, |
| <a href=#195 id=195 data-nosnippet>195</a> BindingAnnotation::Ref => BindingMode::Ref(Mutability::Not), |
| <a href=#196 id=196 data-nosnippet>196</a> BindingAnnotation::RefMut => BindingMode::Ref(Mutability::Mut), |
| <a href=#197 id=197 data-nosnippet>197</a> } |
| <a href=#198 id=198 data-nosnippet>198</a> } |
| <a href=#199 id=199 data-nosnippet>199</a>} |
| <a href=#200 id=200 data-nosnippet>200</a> |
| <a href=#201 id=201 data-nosnippet>201</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone, Copy)] |
| <a href=#202 id=202 data-nosnippet>202</a></span><span class="kw">pub enum </span>InferenceTyDiagnosticSource { |
| <a href=#203 id=203 data-nosnippet>203</a> <span class="doccomment">/// Diagnostics that come from types in the body. |
| <a href=#204 id=204 data-nosnippet>204</a> </span>Body, |
| <a href=#205 id=205 data-nosnippet>205</a> <span class="doccomment">/// Diagnostics that come from types in fn parameters/return type, or static & const types. |
| <a href=#206 id=206 data-nosnippet>206</a> </span>Signature, |
| <a href=#207 id=207 data-nosnippet>207</a>} |
| <a href=#208 id=208 data-nosnippet>208</a> |
| <a href=#209 id=209 data-nosnippet>209</a><span class="attr">#[derive(Debug, PartialEq, Eq, Clone)] |
| <a href=#210 id=210 data-nosnippet>210</a></span><span class="kw">pub enum </span>InferenceDiagnostic { |
| <a href=#211 id=211 data-nosnippet>211</a> NoSuchField { |
| <a href=#212 id=212 data-nosnippet>212</a> field: ExprOrPatId, |
| <a href=#213 id=213 data-nosnippet>213</a> private: <span class="prelude-ty">Option</span><LocalFieldId>, |
| <a href=#214 id=214 data-nosnippet>214</a> variant: VariantId, |
| <a href=#215 id=215 data-nosnippet>215</a> }, |
| <a href=#216 id=216 data-nosnippet>216</a> PrivateField { |
| <a href=#217 id=217 data-nosnippet>217</a> expr: ExprId, |
| <a href=#218 id=218 data-nosnippet>218</a> field: FieldId, |
| <a href=#219 id=219 data-nosnippet>219</a> }, |
| <a href=#220 id=220 data-nosnippet>220</a> PrivateAssocItem { |
| <a href=#221 id=221 data-nosnippet>221</a> id: ExprOrPatId, |
| <a href=#222 id=222 data-nosnippet>222</a> item: AssocItemId, |
| <a href=#223 id=223 data-nosnippet>223</a> }, |
| <a href=#224 id=224 data-nosnippet>224</a> UnresolvedField { |
| <a href=#225 id=225 data-nosnippet>225</a> expr: ExprId, |
| <a href=#226 id=226 data-nosnippet>226</a> receiver: StoredTy, |
| <a href=#227 id=227 data-nosnippet>227</a> name: Name, |
| <a href=#228 id=228 data-nosnippet>228</a> method_with_same_name_exists: bool, |
| <a href=#229 id=229 data-nosnippet>229</a> }, |
| <a href=#230 id=230 data-nosnippet>230</a> UnresolvedMethodCall { |
| <a href=#231 id=231 data-nosnippet>231</a> expr: ExprId, |
| <a href=#232 id=232 data-nosnippet>232</a> receiver: StoredTy, |
| <a href=#233 id=233 data-nosnippet>233</a> name: Name, |
| <a href=#234 id=234 data-nosnippet>234</a> <span class="doccomment">/// Contains the type the field resolves to |
| <a href=#235 id=235 data-nosnippet>235</a> </span>field_with_same_name: <span class="prelude-ty">Option</span><StoredTy>, |
| <a href=#236 id=236 data-nosnippet>236</a> assoc_func_with_same_name: <span class="prelude-ty">Option</span><FunctionId>, |
| <a href=#237 id=237 data-nosnippet>237</a> }, |
| <a href=#238 id=238 data-nosnippet>238</a> UnresolvedAssocItem { |
| <a href=#239 id=239 data-nosnippet>239</a> id: ExprOrPatId, |
| <a href=#240 id=240 data-nosnippet>240</a> }, |
| <a href=#241 id=241 data-nosnippet>241</a> UnresolvedIdent { |
| <a href=#242 id=242 data-nosnippet>242</a> id: ExprOrPatId, |
| <a href=#243 id=243 data-nosnippet>243</a> }, |
| <a href=#244 id=244 data-nosnippet>244</a> <span class="comment">// FIXME: This should be emitted in body lowering |
| <a href=#245 id=245 data-nosnippet>245</a> </span>BreakOutsideOfLoop { |
| <a href=#246 id=246 data-nosnippet>246</a> expr: ExprId, |
| <a href=#247 id=247 data-nosnippet>247</a> is_break: bool, |
| <a href=#248 id=248 data-nosnippet>248</a> bad_value_break: bool, |
| <a href=#249 id=249 data-nosnippet>249</a> }, |
| <a href=#250 id=250 data-nosnippet>250</a> MismatchedArgCount { |
| <a href=#251 id=251 data-nosnippet>251</a> call_expr: ExprId, |
| <a href=#252 id=252 data-nosnippet>252</a> expected: usize, |
| <a href=#253 id=253 data-nosnippet>253</a> found: usize, |
| <a href=#254 id=254 data-nosnippet>254</a> }, |
| <a href=#255 id=255 data-nosnippet>255</a> MismatchedTupleStructPatArgCount { |
| <a href=#256 id=256 data-nosnippet>256</a> pat: ExprOrPatId, |
| <a href=#257 id=257 data-nosnippet>257</a> expected: usize, |
| <a href=#258 id=258 data-nosnippet>258</a> found: usize, |
| <a href=#259 id=259 data-nosnippet>259</a> }, |
| <a href=#260 id=260 data-nosnippet>260</a> ExpectedFunction { |
| <a href=#261 id=261 data-nosnippet>261</a> call_expr: ExprId, |
| <a href=#262 id=262 data-nosnippet>262</a> found: StoredTy, |
| <a href=#263 id=263 data-nosnippet>263</a> }, |
| <a href=#264 id=264 data-nosnippet>264</a> TypedHole { |
| <a href=#265 id=265 data-nosnippet>265</a> expr: ExprId, |
| <a href=#266 id=266 data-nosnippet>266</a> expected: StoredTy, |
| <a href=#267 id=267 data-nosnippet>267</a> }, |
| <a href=#268 id=268 data-nosnippet>268</a> CastToUnsized { |
| <a href=#269 id=269 data-nosnippet>269</a> expr: ExprId, |
| <a href=#270 id=270 data-nosnippet>270</a> cast_ty: StoredTy, |
| <a href=#271 id=271 data-nosnippet>271</a> }, |
| <a href=#272 id=272 data-nosnippet>272</a> InvalidCast { |
| <a href=#273 id=273 data-nosnippet>273</a> expr: ExprId, |
| <a href=#274 id=274 data-nosnippet>274</a> error: CastError, |
| <a href=#275 id=275 data-nosnippet>275</a> expr_ty: StoredTy, |
| <a href=#276 id=276 data-nosnippet>276</a> cast_ty: StoredTy, |
| <a href=#277 id=277 data-nosnippet>277</a> }, |
| <a href=#278 id=278 data-nosnippet>278</a> TyDiagnostic { |
| <a href=#279 id=279 data-nosnippet>279</a> source: InferenceTyDiagnosticSource, |
| <a href=#280 id=280 data-nosnippet>280</a> diag: TyLoweringDiagnostic, |
| <a href=#281 id=281 data-nosnippet>281</a> }, |
| <a href=#282 id=282 data-nosnippet>282</a> PathDiagnostic { |
| <a href=#283 id=283 data-nosnippet>283</a> node: ExprOrPatId, |
| <a href=#284 id=284 data-nosnippet>284</a> diag: PathLoweringDiagnostic, |
| <a href=#285 id=285 data-nosnippet>285</a> }, |
| <a href=#286 id=286 data-nosnippet>286</a> MethodCallIncorrectGenericsLen { |
| <a href=#287 id=287 data-nosnippet>287</a> expr: ExprId, |
| <a href=#288 id=288 data-nosnippet>288</a> provided_count: u32, |
| <a href=#289 id=289 data-nosnippet>289</a> expected_count: u32, |
| <a href=#290 id=290 data-nosnippet>290</a> kind: IncorrectGenericsLenKind, |
| <a href=#291 id=291 data-nosnippet>291</a> def: GenericDefId, |
| <a href=#292 id=292 data-nosnippet>292</a> }, |
| <a href=#293 id=293 data-nosnippet>293</a> MethodCallIncorrectGenericsOrder { |
| <a href=#294 id=294 data-nosnippet>294</a> expr: ExprId, |
| <a href=#295 id=295 data-nosnippet>295</a> param_id: GenericParamId, |
| <a href=#296 id=296 data-nosnippet>296</a> arg_idx: u32, |
| <a href=#297 id=297 data-nosnippet>297</a> <span class="doccomment">/// Whether the `GenericArgs` contains a `Self` arg. |
| <a href=#298 id=298 data-nosnippet>298</a> </span>has_self_arg: bool, |
| <a href=#299 id=299 data-nosnippet>299</a> }, |
| <a href=#300 id=300 data-nosnippet>300</a>} |
| <a href=#301 id=301 data-nosnippet>301</a> |
| <a href=#302 id=302 data-nosnippet>302</a><span class="doccomment">/// A mismatch between an expected and an inferred type. |
| <a href=#303 id=303 data-nosnippet>303</a></span><span class="attr">#[derive(Clone, PartialEq, Eq, Debug, Hash)] |
| <a href=#304 id=304 data-nosnippet>304</a></span><span class="kw">pub struct </span>TypeMismatch { |
| <a href=#305 id=305 data-nosnippet>305</a> <span class="kw">pub </span>expected: StoredTy, |
| <a href=#306 id=306 data-nosnippet>306</a> <span class="kw">pub </span>actual: StoredTy, |
| <a href=#307 id=307 data-nosnippet>307</a>} |
| <a href=#308 id=308 data-nosnippet>308</a> |
| <a href=#309 id=309 data-nosnippet>309</a><span class="doccomment">/// Represents coercing a value to a different type of value. |
| <a href=#310 id=310 data-nosnippet>310</a>/// |
| <a href=#311 id=311 data-nosnippet>311</a>/// We transform values by following a number of `Adjust` steps in order. |
| <a href=#312 id=312 data-nosnippet>312</a>/// See the documentation on variants of `Adjust` for more details. |
| <a href=#313 id=313 data-nosnippet>313</a>/// |
| <a href=#314 id=314 data-nosnippet>314</a>/// Here are some common scenarios: |
| <a href=#315 id=315 data-nosnippet>315</a>/// |
| <a href=#316 id=316 data-nosnippet>316</a>/// 1. The simplest cases are where a pointer is not adjusted fat vs thin. |
| <a href=#317 id=317 data-nosnippet>317</a>/// Here the pointer will be dereferenced N times (where a dereference can |
| <a href=#318 id=318 data-nosnippet>318</a>/// happen to raw or borrowed pointers or any smart pointer which implements |
| <a href=#319 id=319 data-nosnippet>319</a>/// Deref, including Box<_>). The types of dereferences is given by |
| <a href=#320 id=320 data-nosnippet>320</a>/// `autoderefs`. It can then be auto-referenced zero or one times, indicated |
| <a href=#321 id=321 data-nosnippet>321</a>/// by `autoref`, to either a raw or borrowed pointer. In these cases unsize is |
| <a href=#322 id=322 data-nosnippet>322</a>/// `false`. |
| <a href=#323 id=323 data-nosnippet>323</a>/// |
| <a href=#324 id=324 data-nosnippet>324</a>/// 2. A thin-to-fat coercion involves unsizing the underlying data. We start |
| <a href=#325 id=325 data-nosnippet>325</a>/// with a thin pointer, deref a number of times, unsize the underlying data, |
| <a href=#326 id=326 data-nosnippet>326</a>/// then autoref. The 'unsize' phase may change a fixed length array to a |
| <a href=#327 id=327 data-nosnippet>327</a>/// dynamically sized one, a concrete object to a trait object, or statically |
| <a href=#328 id=328 data-nosnippet>328</a>/// sized struct to a dynamically sized one. E.g., &[i32; 4] -> &[i32] is |
| <a href=#329 id=329 data-nosnippet>329</a>/// represented by: |
| <a href=#330 id=330 data-nosnippet>330</a>/// |
| <a href=#331 id=331 data-nosnippet>331</a>/// ```ignore |
| <a href=#332 id=332 data-nosnippet>332</a>/// Deref(None) -> [i32; 4], |
| <a href=#333 id=333 data-nosnippet>333</a>/// Borrow(AutoBorrow::Ref) -> &[i32; 4], |
| <a href=#334 id=334 data-nosnippet>334</a>/// Unsize -> &[i32], |
| <a href=#335 id=335 data-nosnippet>335</a>/// ``` |
| <a href=#336 id=336 data-nosnippet>336</a>/// |
| <a href=#337 id=337 data-nosnippet>337</a>/// Note that for a struct, the 'deep' unsizing of the struct is not recorded. |
| <a href=#338 id=338 data-nosnippet>338</a>/// E.g., `struct Foo<T> { it: T }` we can coerce &Foo<[i32; 4]> to &Foo<[i32]> |
| <a href=#339 id=339 data-nosnippet>339</a>/// The autoderef and -ref are the same as in the above example, but the type |
| <a href=#340 id=340 data-nosnippet>340</a>/// stored in `unsize` is `Foo<[i32]>`, we don't store any further detail about |
| <a href=#341 id=341 data-nosnippet>341</a>/// the underlying conversions from `[i32; 4]` to `[i32]`. |
| <a href=#342 id=342 data-nosnippet>342</a>/// |
| <a href=#343 id=343 data-nosnippet>343</a>/// 3. Coercing a `Box<T>` to `Box<dyn Trait>` is an interesting special case. In |
| <a href=#344 id=344 data-nosnippet>344</a>/// that case, we have the pointer we need coming in, so there are no |
| <a href=#345 id=345 data-nosnippet>345</a>/// autoderefs, and no autoref. Instead we just do the `Unsize` transformation. |
| <a href=#346 id=346 data-nosnippet>346</a>/// At some point, of course, `Box` should move out of the compiler, in which |
| <a href=#347 id=347 data-nosnippet>347</a>/// case this is analogous to transforming a struct. E.g., Box<[i32; 4]> -> |
| <a href=#348 id=348 data-nosnippet>348</a>/// Box<[i32]> is an `Adjust::Unsize` with the target `Box<[i32]>`. |
| <a href=#349 id=349 data-nosnippet>349</a></span><span class="attr">#[derive(Clone, Debug, PartialEq, Eq, Hash)] |
| <a href=#350 id=350 data-nosnippet>350</a></span><span class="kw">pub struct </span>Adjustment { |
| <a href=#351 id=351 data-nosnippet>351</a> <span class="kw">pub </span>kind: Adjust, |
| <a href=#352 id=352 data-nosnippet>352</a> <span class="kw">pub </span>target: StoredTy, |
| <a href=#353 id=353 data-nosnippet>353</a>} |
| <a href=#354 id=354 data-nosnippet>354</a> |
| <a href=#355 id=355 data-nosnippet>355</a><span class="kw">impl </span>Adjustment { |
| <a href=#356 id=356 data-nosnippet>356</a> <span class="kw">pub fn </span>borrow<<span class="lifetime">'db</span>>( |
| <a href=#357 id=357 data-nosnippet>357</a> interner: DbInterner<<span class="lifetime">'db</span>>, |
| <a href=#358 id=358 data-nosnippet>358</a> m: Mutability, |
| <a href=#359 id=359 data-nosnippet>359</a> ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#360 id=360 data-nosnippet>360</a> lt: Region<<span class="lifetime">'db</span>>, |
| <a href=#361 id=361 data-nosnippet>361</a> ) -> <span class="self">Self </span>{ |
| <a href=#362 id=362 data-nosnippet>362</a> <span class="kw">let </span>ty = Ty::new_ref(interner, lt, ty, m); |
| <a href=#363 id=363 data-nosnippet>363</a> Adjustment { |
| <a href=#364 id=364 data-nosnippet>364</a> kind: Adjust::Borrow(AutoBorrow::Ref(AutoBorrowMutability::new(m, AllowTwoPhase::No))), |
| <a href=#365 id=365 data-nosnippet>365</a> target: ty.store(), |
| <a href=#366 id=366 data-nosnippet>366</a> } |
| <a href=#367 id=367 data-nosnippet>367</a> } |
| <a href=#368 id=368 data-nosnippet>368</a>} |
| <a href=#369 id=369 data-nosnippet>369</a> |
| <a href=#370 id=370 data-nosnippet>370</a><span class="doccomment">/// At least for initial deployment, we want to limit two-phase borrows to |
| <a href=#371 id=371 data-nosnippet>371</a>/// only a few specific cases. Right now, those are mostly "things that desugar" |
| <a href=#372 id=372 data-nosnippet>372</a>/// into method calls: |
| <a href=#373 id=373 data-nosnippet>373</a>/// - using `x.some_method()` syntax, where some_method takes `&mut self`, |
| <a href=#374 id=374 data-nosnippet>374</a>/// - using `Foo::some_method(&mut x, ...)` syntax, |
| <a href=#375 id=375 data-nosnippet>375</a>/// - binary assignment operators (`+=`, `-=`, `*=`, etc.). |
| <a href=#376 id=376 data-nosnippet>376</a>/// |
| <a href=#377 id=377 data-nosnippet>377</a>/// Anything else should be rejected until generalized two-phase borrow support |
| <a href=#378 id=378 data-nosnippet>378</a>/// is implemented. Right now, dataflow can't handle the general case where there |
| <a href=#379 id=379 data-nosnippet>379</a>/// is more than one use of a mutable borrow, and we don't want to accept too much |
| <a href=#380 id=380 data-nosnippet>380</a>/// new code via two-phase borrows, so we try to limit where we create two-phase |
| <a href=#381 id=381 data-nosnippet>381</a>/// capable mutable borrows. |
| <a href=#382 id=382 data-nosnippet>382</a>/// See #49434 for tracking. |
| <a href=#383 id=383 data-nosnippet>383</a></span><span class="attr">#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| <a href=#384 id=384 data-nosnippet>384</a></span><span class="kw">pub enum </span>AllowTwoPhase { |
| <a href=#385 id=385 data-nosnippet>385</a> <span class="comment">// FIXME: We should use this when appropriate. |
| <a href=#386 id=386 data-nosnippet>386</a> </span>Yes, |
| <a href=#387 id=387 data-nosnippet>387</a> No, |
| <a href=#388 id=388 data-nosnippet>388</a>} |
| <a href=#389 id=389 data-nosnippet>389</a> |
| <a href=#390 id=390 data-nosnippet>390</a><span class="attr">#[derive(Clone, Debug, PartialEq, Eq, Hash)] |
| <a href=#391 id=391 data-nosnippet>391</a></span><span class="kw">pub enum </span>Adjust { |
| <a href=#392 id=392 data-nosnippet>392</a> <span class="doccomment">/// Go from ! to any type. |
| <a href=#393 id=393 data-nosnippet>393</a> </span>NeverToAny, |
| <a href=#394 id=394 data-nosnippet>394</a> <span class="doccomment">/// Dereference once, producing a place. |
| <a href=#395 id=395 data-nosnippet>395</a> </span>Deref(<span class="prelude-ty">Option</span><OverloadedDeref>), |
| <a href=#396 id=396 data-nosnippet>396</a> <span class="doccomment">/// Take the address and produce either a `&` or `*` pointer. |
| <a href=#397 id=397 data-nosnippet>397</a> </span>Borrow(AutoBorrow), |
| <a href=#398 id=398 data-nosnippet>398</a> Pointer(PointerCast), |
| <a href=#399 id=399 data-nosnippet>399</a>} |
| <a href=#400 id=400 data-nosnippet>400</a> |
| <a href=#401 id=401 data-nosnippet>401</a><span class="doccomment">/// An overloaded autoderef step, representing a `Deref(Mut)::deref(_mut)` |
| <a href=#402 id=402 data-nosnippet>402</a>/// call, with the signature `&'a T -> &'a U` or `&'a mut T -> &'a mut U`. |
| <a href=#403 id=403 data-nosnippet>403</a>/// The target type is `U` in both cases, with the region and mutability |
| <a href=#404 id=404 data-nosnippet>404</a>/// being those shared by both the receiver and the returned reference. |
| <a href=#405 id=405 data-nosnippet>405</a></span><span class="attr">#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] |
| <a href=#406 id=406 data-nosnippet>406</a></span><span class="kw">pub struct </span>OverloadedDeref(<span class="kw">pub </span><span class="prelude-ty">Option</span><Mutability>); |
| <a href=#407 id=407 data-nosnippet>407</a> |
| <a href=#408 id=408 data-nosnippet>408</a><span class="attr">#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)] |
| <a href=#409 id=409 data-nosnippet>409</a></span><span class="kw">pub enum </span>AutoBorrowMutability { |
| <a href=#410 id=410 data-nosnippet>410</a> Mut { allow_two_phase_borrow: AllowTwoPhase }, |
| <a href=#411 id=411 data-nosnippet>411</a> Not, |
| <a href=#412 id=412 data-nosnippet>412</a>} |
| <a href=#413 id=413 data-nosnippet>413</a> |
| <a href=#414 id=414 data-nosnippet>414</a><span class="kw">impl </span>AutoBorrowMutability { |
| <a href=#415 id=415 data-nosnippet>415</a> <span class="doccomment">/// Creates an `AutoBorrowMutability` from a mutability and allowance of two phase borrows. |
| <a href=#416 id=416 data-nosnippet>416</a> /// |
| <a href=#417 id=417 data-nosnippet>417</a> /// Note that when `mutbl.is_not()`, `allow_two_phase_borrow` is ignored |
| <a href=#418 id=418 data-nosnippet>418</a> </span><span class="kw">pub fn </span>new(mutbl: Mutability, allow_two_phase_borrow: AllowTwoPhase) -> <span class="self">Self </span>{ |
| <a href=#419 id=419 data-nosnippet>419</a> <span class="kw">match </span>mutbl { |
| <a href=#420 id=420 data-nosnippet>420</a> Mutability::Not => <span class="self">Self</span>::Not, |
| <a href=#421 id=421 data-nosnippet>421</a> Mutability::Mut => <span class="self">Self</span>::Mut { allow_two_phase_borrow }, |
| <a href=#422 id=422 data-nosnippet>422</a> } |
| <a href=#423 id=423 data-nosnippet>423</a> } |
| <a href=#424 id=424 data-nosnippet>424</a>} |
| <a href=#425 id=425 data-nosnippet>425</a> |
| <a href=#426 id=426 data-nosnippet>426</a><span class="kw">impl </span>From<AutoBorrowMutability> <span class="kw">for </span>Mutability { |
| <a href=#427 id=427 data-nosnippet>427</a> <span class="kw">fn </span>from(m: AutoBorrowMutability) -> <span class="self">Self </span>{ |
| <a href=#428 id=428 data-nosnippet>428</a> <span class="kw">match </span>m { |
| <a href=#429 id=429 data-nosnippet>429</a> AutoBorrowMutability::Mut { .. } => Mutability::Mut, |
| <a href=#430 id=430 data-nosnippet>430</a> AutoBorrowMutability::Not => Mutability::Not, |
| <a href=#431 id=431 data-nosnippet>431</a> } |
| <a href=#432 id=432 data-nosnippet>432</a> } |
| <a href=#433 id=433 data-nosnippet>433</a>} |
| <a href=#434 id=434 data-nosnippet>434</a> |
| <a href=#435 id=435 data-nosnippet>435</a><span class="attr">#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] |
| <a href=#436 id=436 data-nosnippet>436</a></span><span class="kw">pub enum </span>AutoBorrow { |
| <a href=#437 id=437 data-nosnippet>437</a> <span class="doccomment">/// Converts from T to &T. |
| <a href=#438 id=438 data-nosnippet>438</a> </span>Ref(AutoBorrowMutability), |
| <a href=#439 id=439 data-nosnippet>439</a> <span class="doccomment">/// Converts from T to *T. |
| <a href=#440 id=440 data-nosnippet>440</a> </span>RawPtr(Mutability), |
| <a href=#441 id=441 data-nosnippet>441</a>} |
| <a href=#442 id=442 data-nosnippet>442</a> |
| <a href=#443 id=443 data-nosnippet>443</a><span class="kw">impl </span>AutoBorrow { |
| <a href=#444 id=444 data-nosnippet>444</a> <span class="kw">fn </span>mutability(<span class="self">self</span>) -> Mutability { |
| <a href=#445 id=445 data-nosnippet>445</a> <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#446 id=446 data-nosnippet>446</a> AutoBorrow::Ref(mutbl) => mutbl.into(), |
| <a href=#447 id=447 data-nosnippet>447</a> AutoBorrow::RawPtr(mutbl) => mutbl, |
| <a href=#448 id=448 data-nosnippet>448</a> } |
| <a href=#449 id=449 data-nosnippet>449</a> } |
| <a href=#450 id=450 data-nosnippet>450</a>} |
| <a href=#451 id=451 data-nosnippet>451</a> |
| <a href=#452 id=452 data-nosnippet>452</a><span class="attr">#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] |
| <a href=#453 id=453 data-nosnippet>453</a></span><span class="kw">pub enum </span>PointerCast { |
| <a href=#454 id=454 data-nosnippet>454</a> <span class="doccomment">/// Go from a fn-item type to a fn-pointer type. |
| <a href=#455 id=455 data-nosnippet>455</a> </span>ReifyFnPointer, |
| <a href=#456 id=456 data-nosnippet>456</a> |
| <a href=#457 id=457 data-nosnippet>457</a> <span class="doccomment">/// Go from a safe fn pointer to an unsafe fn pointer. |
| <a href=#458 id=458 data-nosnippet>458</a> </span>UnsafeFnPointer, |
| <a href=#459 id=459 data-nosnippet>459</a> |
| <a href=#460 id=460 data-nosnippet>460</a> <span class="doccomment">/// Go from a non-capturing closure to an fn pointer or an unsafe fn pointer. |
| <a href=#461 id=461 data-nosnippet>461</a> /// It cannot convert a closure that requires unsafe. |
| <a href=#462 id=462 data-nosnippet>462</a> </span>ClosureFnPointer(Safety), |
| <a href=#463 id=463 data-nosnippet>463</a> |
| <a href=#464 id=464 data-nosnippet>464</a> <span class="doccomment">/// Go from a mut raw pointer to a const raw pointer. |
| <a href=#465 id=465 data-nosnippet>465</a> </span>MutToConstPointer, |
| <a href=#466 id=466 data-nosnippet>466</a> |
| <a href=#467 id=467 data-nosnippet>467</a> <span class="attr">#[allow(dead_code)] |
| <a href=#468 id=468 data-nosnippet>468</a> </span><span class="doccomment">/// Go from `*const [T; N]` to `*const T` |
| <a href=#469 id=469 data-nosnippet>469</a> </span>ArrayToPointer, |
| <a href=#470 id=470 data-nosnippet>470</a> |
| <a href=#471 id=471 data-nosnippet>471</a> <span class="doccomment">/// Unsize a pointer/reference value, e.g., `&[T; n]` to |
| <a href=#472 id=472 data-nosnippet>472</a> /// `&[T]`. Note that the source could be a thin or fat pointer. |
| <a href=#473 id=473 data-nosnippet>473</a> /// This will do things like convert thin pointers to fat |
| <a href=#474 id=474 data-nosnippet>474</a> /// pointers, or convert structs containing thin pointers to |
| <a href=#475 id=475 data-nosnippet>475</a> /// structs containing fat pointers, or convert between fat |
| <a href=#476 id=476 data-nosnippet>476</a> /// pointers. We don't store the details of how the transform is |
| <a href=#477 id=477 data-nosnippet>477</a> /// done (in fact, we don't know that, because it might depend on |
| <a href=#478 id=478 data-nosnippet>478</a> /// the precise type parameters). We just store the target |
| <a href=#479 id=479 data-nosnippet>479</a> /// type. Codegen backends and miri figure out what has to be done |
| <a href=#480 id=480 data-nosnippet>480</a> /// based on the precise source/target type at hand. |
| <a href=#481 id=481 data-nosnippet>481</a> </span>Unsize, |
| <a href=#482 id=482 data-nosnippet>482</a>} |
| <a href=#483 id=483 data-nosnippet>483</a> |
| <a href=#484 id=484 data-nosnippet>484</a><span class="doccomment">/// The result of type inference: A mapping from expressions and patterns to types. |
| <a href=#485 id=485 data-nosnippet>485</a>/// |
| <a href=#486 id=486 data-nosnippet>486</a>/// When you add a field that stores types (including `Substitution` and the like), don't forget |
| <a href=#487 id=487 data-nosnippet>487</a>/// `resolve_completely()`'ing them in `InferenceContext::resolve_all()`. Inference variables must |
| <a href=#488 id=488 data-nosnippet>488</a>/// not appear in the final inference result. |
| <a href=#489 id=489 data-nosnippet>489</a></span><span class="attr">#[derive(Clone, PartialEq, Eq, Debug)] |
| <a href=#490 id=490 data-nosnippet>490</a></span><span class="kw">pub struct </span>InferenceResult { |
| <a href=#491 id=491 data-nosnippet>491</a> <span class="doccomment">/// For each method call expr, records the function it resolves to. |
| <a href=#492 id=492 data-nosnippet>492</a> </span>method_resolutions: FxHashMap<ExprId, (FunctionId, StoredGenericArgs)>, |
| <a href=#493 id=493 data-nosnippet>493</a> <span class="doccomment">/// For each field access expr, records the field it resolves to. |
| <a href=#494 id=494 data-nosnippet>494</a> </span>field_resolutions: FxHashMap<ExprId, Either<FieldId, TupleFieldId>>, |
| <a href=#495 id=495 data-nosnippet>495</a> <span class="doccomment">/// For each struct literal or pattern, records the variant it resolves to. |
| <a href=#496 id=496 data-nosnippet>496</a> </span>variant_resolutions: FxHashMap<ExprOrPatId, VariantId>, |
| <a href=#497 id=497 data-nosnippet>497</a> <span class="doccomment">/// For each associated item record what it resolves to |
| <a href=#498 id=498 data-nosnippet>498</a> </span>assoc_resolutions: FxHashMap<ExprOrPatId, (CandidateId, StoredGenericArgs)>, |
| <a href=#499 id=499 data-nosnippet>499</a> <span class="doccomment">/// Whenever a tuple field expression access a tuple field, we allocate a tuple id in |
| <a href=#500 id=500 data-nosnippet>500</a> /// [`InferenceContext`] and store the tuples substitution there. This map is the reverse of |
| <a href=#501 id=501 data-nosnippet>501</a> /// that which allows us to resolve a [`TupleFieldId`]s type. |
| <a href=#502 id=502 data-nosnippet>502</a> </span>tuple_field_access_types: ThinVec<StoredTys>, |
| <a href=#503 id=503 data-nosnippet>503</a> |
| <a href=#504 id=504 data-nosnippet>504</a> <span class="kw">pub</span>(<span class="kw">crate</span>) type_of_expr: ArenaMap<ExprId, StoredTy>, |
| <a href=#505 id=505 data-nosnippet>505</a> <span class="doccomment">/// For each pattern record the type it resolves to. |
| <a href=#506 id=506 data-nosnippet>506</a> /// |
| <a href=#507 id=507 data-nosnippet>507</a> /// **Note**: When a pattern type is resolved it may still contain |
| <a href=#508 id=508 data-nosnippet>508</a> /// unresolved or missing subpatterns or subpatterns of mismatched types. |
| <a href=#509 id=509 data-nosnippet>509</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) type_of_pat: ArenaMap<PatId, StoredTy>, |
| <a href=#510 id=510 data-nosnippet>510</a> <span class="kw">pub</span>(<span class="kw">crate</span>) type_of_binding: ArenaMap<BindingId, StoredTy>, |
| <a href=#511 id=511 data-nosnippet>511</a> <span class="kw">pub</span>(<span class="kw">crate</span>) type_of_type_placeholder: FxHashMap<TypeRefId, StoredTy>, |
| <a href=#512 id=512 data-nosnippet>512</a> <span class="kw">pub</span>(<span class="kw">crate</span>) type_of_opaque: FxHashMap<InternedOpaqueTyId, StoredTy>, |
| <a href=#513 id=513 data-nosnippet>513</a> |
| <a href=#514 id=514 data-nosnippet>514</a> <span class="kw">pub</span>(<span class="kw">crate</span>) type_mismatches: <span class="prelude-ty">Option</span><Box<FxHashMap<ExprOrPatId, TypeMismatch>>>, |
| <a href=#515 id=515 data-nosnippet>515</a> <span class="doccomment">/// Whether there are any type-mismatching errors in the result. |
| <a href=#516 id=516 data-nosnippet>516</a> </span><span class="comment">// FIXME: This isn't as useful as initially thought due to us falling back placeholders to |
| <a href=#517 id=517 data-nosnippet>517</a> // `TyKind::Error`. |
| <a href=#518 id=518 data-nosnippet>518</a> // Which will then mark this field. |
| <a href=#519 id=519 data-nosnippet>519</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) has_errors: bool, |
| <a href=#520 id=520 data-nosnippet>520</a> <span class="doccomment">/// During inference this field is empty and [`InferenceContext::diagnostics`] is filled instead. |
| <a href=#521 id=521 data-nosnippet>521</a> </span>diagnostics: ThinVec<InferenceDiagnostic>, |
| <a href=#522 id=522 data-nosnippet>522</a> |
| <a href=#523 id=523 data-nosnippet>523</a> <span class="doccomment">/// Interned `Error` type to return references to. |
| <a href=#524 id=524 data-nosnippet>524</a> </span><span class="comment">// FIXME: Remove this. |
| <a href=#525 id=525 data-nosnippet>525</a> </span>error_ty: StoredTy, |
| <a href=#526 id=526 data-nosnippet>526</a> |
| <a href=#527 id=527 data-nosnippet>527</a> <span class="kw">pub</span>(<span class="kw">crate</span>) expr_adjustments: FxHashMap<ExprId, Box<[Adjustment]>>, |
| <a href=#528 id=528 data-nosnippet>528</a> <span class="doccomment">/// Stores the types which were implicitly dereferenced in pattern binding modes. |
| <a href=#529 id=529 data-nosnippet>529</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) pat_adjustments: FxHashMap<PatId, Vec<StoredTy>>, |
| <a href=#530 id=530 data-nosnippet>530</a> <span class="doccomment">/// Stores the binding mode (`ref` in `let ref x = 2`) of bindings. |
| <a href=#531 id=531 data-nosnippet>531</a> /// |
| <a href=#532 id=532 data-nosnippet>532</a> /// This one is tied to the `PatId` instead of `BindingId`, because in some rare cases, a binding in an |
| <a href=#533 id=533 data-nosnippet>533</a> /// or pattern can have multiple binding modes. For example: |
| <a href=#534 id=534 data-nosnippet>534</a> /// ``` |
| <a href=#535 id=535 data-nosnippet>535</a> /// fn foo(mut slice: &[u32]) -> usize { |
| <a href=#536 id=536 data-nosnippet>536</a> /// slice = match slice { |
| <a href=#537 id=537 data-nosnippet>537</a> /// [0, rest @ ..] | rest => rest, |
| <a href=#538 id=538 data-nosnippet>538</a> /// }; |
| <a href=#539 id=539 data-nosnippet>539</a> /// 0 |
| <a href=#540 id=540 data-nosnippet>540</a> /// } |
| <a href=#541 id=541 data-nosnippet>541</a> /// ``` |
| <a href=#542 id=542 data-nosnippet>542</a> /// the first `rest` has implicit `ref` binding mode, but the second `rest` binding mode is `move`. |
| <a href=#543 id=543 data-nosnippet>543</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) binding_modes: ArenaMap<PatId, BindingMode>, |
| <a href=#544 id=544 data-nosnippet>544</a> |
| <a href=#545 id=545 data-nosnippet>545</a> <span class="kw">pub</span>(<span class="kw">crate</span>) closure_info: FxHashMap<InternedClosureId, (Vec<CapturedItem>, FnTrait)>, |
| <a href=#546 id=546 data-nosnippet>546</a> <span class="comment">// FIXME: remove this field |
| <a href=#547 id=547 data-nosnippet>547</a> </span><span class="kw">pub </span>mutated_bindings_in_closure: FxHashSet<BindingId>, |
| <a href=#548 id=548 data-nosnippet>548</a> |
| <a href=#549 id=549 data-nosnippet>549</a> <span class="kw">pub</span>(<span class="kw">crate</span>) coercion_casts: FxHashSet<ExprId>, |
| <a href=#550 id=550 data-nosnippet>550</a>} |
| <a href=#551 id=551 data-nosnippet>551</a> |
| <a href=#552 id=552 data-nosnippet>552</a><span class="attr">#[salsa::tracked] |
| <a href=#553 id=553 data-nosnippet>553</a></span><span class="kw">impl </span>InferenceResult { |
| <a href=#554 id=554 data-nosnippet>554</a> <span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>), cycle_result = infer_cycle_result)] |
| <a href=#555 id=555 data-nosnippet>555</a> </span><span class="kw">pub fn </span>for_body(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, def: DefWithBodyId) -> InferenceResult { |
| <a href=#556 id=556 data-nosnippet>556</a> infer_query(db, def) |
| <a href=#557 id=557 data-nosnippet>557</a> } |
| <a href=#558 id=558 data-nosnippet>558</a>} |
| <a href=#559 id=559 data-nosnippet>559</a> |
| <a href=#560 id=560 data-nosnippet>560</a><span class="kw">impl </span>InferenceResult { |
| <a href=#561 id=561 data-nosnippet>561</a> <span class="kw">fn </span>new(error_ty: Ty<<span class="lifetime">'_</span>>) -> <span class="self">Self </span>{ |
| <a href=#562 id=562 data-nosnippet>562</a> <span class="self">Self </span>{ |
| <a href=#563 id=563 data-nosnippet>563</a> method_resolutions: Default::default(), |
| <a href=#564 id=564 data-nosnippet>564</a> field_resolutions: Default::default(), |
| <a href=#565 id=565 data-nosnippet>565</a> variant_resolutions: Default::default(), |
| <a href=#566 id=566 data-nosnippet>566</a> assoc_resolutions: Default::default(), |
| <a href=#567 id=567 data-nosnippet>567</a> tuple_field_access_types: Default::default(), |
| <a href=#568 id=568 data-nosnippet>568</a> diagnostics: Default::default(), |
| <a href=#569 id=569 data-nosnippet>569</a> type_of_expr: Default::default(), |
| <a href=#570 id=570 data-nosnippet>570</a> type_of_pat: Default::default(), |
| <a href=#571 id=571 data-nosnippet>571</a> type_of_binding: Default::default(), |
| <a href=#572 id=572 data-nosnippet>572</a> type_of_type_placeholder: Default::default(), |
| <a href=#573 id=573 data-nosnippet>573</a> type_of_opaque: Default::default(), |
| <a href=#574 id=574 data-nosnippet>574</a> type_mismatches: Default::default(), |
| <a href=#575 id=575 data-nosnippet>575</a> has_errors: Default::default(), |
| <a href=#576 id=576 data-nosnippet>576</a> error_ty: error_ty.store(), |
| <a href=#577 id=577 data-nosnippet>577</a> pat_adjustments: Default::default(), |
| <a href=#578 id=578 data-nosnippet>578</a> binding_modes: Default::default(), |
| <a href=#579 id=579 data-nosnippet>579</a> expr_adjustments: Default::default(), |
| <a href=#580 id=580 data-nosnippet>580</a> closure_info: Default::default(), |
| <a href=#581 id=581 data-nosnippet>581</a> mutated_bindings_in_closure: Default::default(), |
| <a href=#582 id=582 data-nosnippet>582</a> coercion_casts: Default::default(), |
| <a href=#583 id=583 data-nosnippet>583</a> } |
| <a href=#584 id=584 data-nosnippet>584</a> } |
| <a href=#585 id=585 data-nosnippet>585</a> |
| <a href=#586 id=586 data-nosnippet>586</a> <span class="kw">pub fn </span>method_resolution<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, expr: ExprId) -> <span class="prelude-ty">Option</span><(FunctionId, GenericArgs<<span class="lifetime">'db</span>>)> { |
| <a href=#587 id=587 data-nosnippet>587</a> <span class="self">self</span>.method_resolutions.get(<span class="kw-2">&</span>expr).map(|(func, args)| (<span class="kw-2">*</span>func, args.as_ref())) |
| <a href=#588 id=588 data-nosnippet>588</a> } |
| <a href=#589 id=589 data-nosnippet>589</a> <span class="kw">pub fn </span>field_resolution(<span class="kw-2">&</span><span class="self">self</span>, expr: ExprId) -> <span class="prelude-ty">Option</span><Either<FieldId, TupleFieldId>> { |
| <a href=#590 id=590 data-nosnippet>590</a> <span class="self">self</span>.field_resolutions.get(<span class="kw-2">&</span>expr).copied() |
| <a href=#591 id=591 data-nosnippet>591</a> } |
| <a href=#592 id=592 data-nosnippet>592</a> <span class="kw">pub fn </span>variant_resolution_for_expr(<span class="kw-2">&</span><span class="self">self</span>, id: ExprId) -> <span class="prelude-ty">Option</span><VariantId> { |
| <a href=#593 id=593 data-nosnippet>593</a> <span class="self">self</span>.variant_resolutions.get(<span class="kw-2">&</span>id.into()).copied() |
| <a href=#594 id=594 data-nosnippet>594</a> } |
| <a href=#595 id=595 data-nosnippet>595</a> <span class="kw">pub fn </span>variant_resolution_for_pat(<span class="kw-2">&</span><span class="self">self</span>, id: PatId) -> <span class="prelude-ty">Option</span><VariantId> { |
| <a href=#596 id=596 data-nosnippet>596</a> <span class="self">self</span>.variant_resolutions.get(<span class="kw-2">&</span>id.into()).copied() |
| <a href=#597 id=597 data-nosnippet>597</a> } |
| <a href=#598 id=598 data-nosnippet>598</a> <span class="kw">pub fn </span>variant_resolution_for_expr_or_pat(<span class="kw-2">&</span><span class="self">self</span>, id: ExprOrPatId) -> <span class="prelude-ty">Option</span><VariantId> { |
| <a href=#599 id=599 data-nosnippet>599</a> <span class="kw">match </span>id { |
| <a href=#600 id=600 data-nosnippet>600</a> ExprOrPatId::ExprId(id) => <span class="self">self</span>.variant_resolution_for_expr(id), |
| <a href=#601 id=601 data-nosnippet>601</a> ExprOrPatId::PatId(id) => <span class="self">self</span>.variant_resolution_for_pat(id), |
| <a href=#602 id=602 data-nosnippet>602</a> } |
| <a href=#603 id=603 data-nosnippet>603</a> } |
| <a href=#604 id=604 data-nosnippet>604</a> <span class="kw">pub fn </span>assoc_resolutions_for_expr<<span class="lifetime">'db</span>>( |
| <a href=#605 id=605 data-nosnippet>605</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#606 id=606 data-nosnippet>606</a> id: ExprId, |
| <a href=#607 id=607 data-nosnippet>607</a> ) -> <span class="prelude-ty">Option</span><(CandidateId, GenericArgs<<span class="lifetime">'db</span>>)> { |
| <a href=#608 id=608 data-nosnippet>608</a> <span class="self">self</span>.assoc_resolutions.get(<span class="kw-2">&</span>id.into()).map(|(assoc, args)| (<span class="kw-2">*</span>assoc, args.as_ref())) |
| <a href=#609 id=609 data-nosnippet>609</a> } |
| <a href=#610 id=610 data-nosnippet>610</a> <span class="kw">pub fn </span>assoc_resolutions_for_pat<<span class="lifetime">'db</span>>( |
| <a href=#611 id=611 data-nosnippet>611</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#612 id=612 data-nosnippet>612</a> id: PatId, |
| <a href=#613 id=613 data-nosnippet>613</a> ) -> <span class="prelude-ty">Option</span><(CandidateId, GenericArgs<<span class="lifetime">'db</span>>)> { |
| <a href=#614 id=614 data-nosnippet>614</a> <span class="self">self</span>.assoc_resolutions.get(<span class="kw-2">&</span>id.into()).map(|(assoc, args)| (<span class="kw-2">*</span>assoc, args.as_ref())) |
| <a href=#615 id=615 data-nosnippet>615</a> } |
| <a href=#616 id=616 data-nosnippet>616</a> <span class="kw">pub fn </span>assoc_resolutions_for_expr_or_pat<<span class="lifetime">'db</span>>( |
| <a href=#617 id=617 data-nosnippet>617</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#618 id=618 data-nosnippet>618</a> id: ExprOrPatId, |
| <a href=#619 id=619 data-nosnippet>619</a> ) -> <span class="prelude-ty">Option</span><(CandidateId, GenericArgs<<span class="lifetime">'db</span>>)> { |
| <a href=#620 id=620 data-nosnippet>620</a> <span class="kw">match </span>id { |
| <a href=#621 id=621 data-nosnippet>621</a> ExprOrPatId::ExprId(id) => <span class="self">self</span>.assoc_resolutions_for_expr(id), |
| <a href=#622 id=622 data-nosnippet>622</a> ExprOrPatId::PatId(id) => <span class="self">self</span>.assoc_resolutions_for_pat(id), |
| <a href=#623 id=623 data-nosnippet>623</a> } |
| <a href=#624 id=624 data-nosnippet>624</a> } |
| <a href=#625 id=625 data-nosnippet>625</a> <span class="kw">pub fn </span>type_mismatch_for_expr(<span class="kw-2">&</span><span class="self">self</span>, expr: ExprId) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>TypeMismatch> { |
| <a href=#626 id=626 data-nosnippet>626</a> <span class="self">self</span>.type_mismatches.as_deref()<span class="question-mark">?</span>.get(<span class="kw-2">&</span>expr.into()) |
| <a href=#627 id=627 data-nosnippet>627</a> } |
| <a href=#628 id=628 data-nosnippet>628</a> <span class="kw">pub fn </span>type_mismatch_for_pat(<span class="kw-2">&</span><span class="self">self</span>, pat: PatId) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>TypeMismatch> { |
| <a href=#629 id=629 data-nosnippet>629</a> <span class="self">self</span>.type_mismatches.as_deref()<span class="question-mark">?</span>.get(<span class="kw-2">&</span>pat.into()) |
| <a href=#630 id=630 data-nosnippet>630</a> } |
| <a href=#631 id=631 data-nosnippet>631</a> <span class="kw">pub fn </span>type_mismatches(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (ExprOrPatId, <span class="kw-2">&</span>TypeMismatch)> { |
| <a href=#632 id=632 data-nosnippet>632</a> <span class="self">self</span>.type_mismatches |
| <a href=#633 id=633 data-nosnippet>633</a> .as_deref() |
| <a href=#634 id=634 data-nosnippet>634</a> .into_iter() |
| <a href=#635 id=635 data-nosnippet>635</a> .flatten() |
| <a href=#636 id=636 data-nosnippet>636</a> .map(|(expr_or_pat, mismatch)| (<span class="kw-2">*</span>expr_or_pat, mismatch)) |
| <a href=#637 id=637 data-nosnippet>637</a> } |
| <a href=#638 id=638 data-nosnippet>638</a> <span class="kw">pub fn </span>expr_type_mismatches(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (ExprId, <span class="kw-2">&</span>TypeMismatch)> { |
| <a href=#639 id=639 data-nosnippet>639</a> <span class="self">self</span>.type_mismatches.as_deref().into_iter().flatten().filter_map( |
| <a href=#640 id=640 data-nosnippet>640</a> |(expr_or_pat, mismatch)| <span class="kw">match </span><span class="kw-2">*</span>expr_or_pat { |
| <a href=#641 id=641 data-nosnippet>641</a> ExprOrPatId::ExprId(expr) => <span class="prelude-val">Some</span>((expr, mismatch)), |
| <a href=#642 id=642 data-nosnippet>642</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#643 id=643 data-nosnippet>643</a> }, |
| <a href=#644 id=644 data-nosnippet>644</a> ) |
| <a href=#645 id=645 data-nosnippet>645</a> } |
| <a href=#646 id=646 data-nosnippet>646</a> <span class="kw">pub fn </span>placeholder_types<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (TypeRefId, Ty<<span class="lifetime">'db</span>>)> { |
| <a href=#647 id=647 data-nosnippet>647</a> <span class="self">self</span>.type_of_type_placeholder.iter().map(|(<span class="kw-2">&</span>type_ref, ty)| (type_ref, ty.as_ref())) |
| <a href=#648 id=648 data-nosnippet>648</a> } |
| <a href=#649 id=649 data-nosnippet>649</a> <span class="kw">pub fn </span>type_of_type_placeholder<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, type_ref: TypeRefId) -> <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>> { |
| <a href=#650 id=650 data-nosnippet>650</a> <span class="self">self</span>.type_of_type_placeholder.get(<span class="kw-2">&</span>type_ref).map(|ty| ty.as_ref()) |
| <a href=#651 id=651 data-nosnippet>651</a> } |
| <a href=#652 id=652 data-nosnippet>652</a> <span class="kw">pub fn </span>closure_info(<span class="kw-2">&</span><span class="self">self</span>, closure: InternedClosureId) -> <span class="kw-2">&</span>(Vec<CapturedItem>, FnTrait) { |
| <a href=#653 id=653 data-nosnippet>653</a> <span class="self">self</span>.closure_info.get(<span class="kw-2">&</span>closure).unwrap() |
| <a href=#654 id=654 data-nosnippet>654</a> } |
| <a href=#655 id=655 data-nosnippet>655</a> <span class="kw">pub fn </span>type_of_expr_or_pat<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: ExprOrPatId) -> <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>> { |
| <a href=#656 id=656 data-nosnippet>656</a> <span class="kw">match </span>id { |
| <a href=#657 id=657 data-nosnippet>657</a> ExprOrPatId::ExprId(id) => <span class="self">self</span>.type_of_expr.get(id).map(|it| it.as_ref()), |
| <a href=#658 id=658 data-nosnippet>658</a> ExprOrPatId::PatId(id) => <span class="self">self</span>.type_of_pat.get(id).map(|it| it.as_ref()), |
| <a href=#659 id=659 data-nosnippet>659</a> } |
| <a href=#660 id=660 data-nosnippet>660</a> } |
| <a href=#661 id=661 data-nosnippet>661</a> <span class="kw">pub fn </span>type_of_expr_with_adjust<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: ExprId) -> <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>> { |
| <a href=#662 id=662 data-nosnippet>662</a> <span class="kw">match </span><span class="self">self</span>.expr_adjustments.get(<span class="kw-2">&</span>id).and_then(|adjustments| { |
| <a href=#663 id=663 data-nosnippet>663</a> adjustments.iter().rfind(|adj| { |
| <a href=#664 id=664 data-nosnippet>664</a> <span class="comment">// https://github.com/rust-lang/rust/blob/67819923ac8ea353aaa775303f4c3aacbf41d010/compiler/rustc_mir_build/src/thir/cx/expr.rs#L140 |
| <a href=#665 id=665 data-nosnippet>665</a> </span>!<span class="macro">matches!</span>( |
| <a href=#666 id=666 data-nosnippet>666</a> adj, |
| <a href=#667 id=667 data-nosnippet>667</a> Adjustment { |
| <a href=#668 id=668 data-nosnippet>668</a> kind: Adjust::NeverToAny, |
| <a href=#669 id=669 data-nosnippet>669</a> target, |
| <a href=#670 id=670 data-nosnippet>670</a> } <span class="kw">if </span>target.as_ref().is_never() |
| <a href=#671 id=671 data-nosnippet>671</a> ) |
| <a href=#672 id=672 data-nosnippet>672</a> }) |
| <a href=#673 id=673 data-nosnippet>673</a> }) { |
| <a href=#674 id=674 data-nosnippet>674</a> <span class="prelude-val">Some</span>(adjustment) => <span class="prelude-val">Some</span>(adjustment.target.as_ref()), |
| <a href=#675 id=675 data-nosnippet>675</a> <span class="prelude-val">None </span>=> <span class="self">self</span>.type_of_expr.get(id).map(|it| it.as_ref()), |
| <a href=#676 id=676 data-nosnippet>676</a> } |
| <a href=#677 id=677 data-nosnippet>677</a> } |
| <a href=#678 id=678 data-nosnippet>678</a> <span class="kw">pub fn </span>type_of_pat_with_adjust<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: PatId) -> <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>> { |
| <a href=#679 id=679 data-nosnippet>679</a> <span class="kw">match </span><span class="self">self</span>.pat_adjustments.get(<span class="kw-2">&</span>id).and_then(|adjustments| adjustments.last()) { |
| <a href=#680 id=680 data-nosnippet>680</a> <span class="prelude-val">Some</span>(adjusted) => <span class="prelude-val">Some</span>(adjusted.as_ref()), |
| <a href=#681 id=681 data-nosnippet>681</a> <span class="prelude-val">None </span>=> <span class="self">self</span>.type_of_pat.get(id).map(|it| it.as_ref()), |
| <a href=#682 id=682 data-nosnippet>682</a> } |
| <a href=#683 id=683 data-nosnippet>683</a> } |
| <a href=#684 id=684 data-nosnippet>684</a> <span class="kw">pub fn </span>is_erroneous(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <a href=#685 id=685 data-nosnippet>685</a> <span class="self">self</span>.has_errors && <span class="self">self</span>.type_of_expr.iter().count() == <span class="number">0 |
| <a href=#686 id=686 data-nosnippet>686</a> </span>} |
| <a href=#687 id=687 data-nosnippet>687</a> |
| <a href=#688 id=688 data-nosnippet>688</a> <span class="kw">pub fn </span>diagnostics(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[InferenceDiagnostic] { |
| <a href=#689 id=689 data-nosnippet>689</a> <span class="kw-2">&</span><span class="self">self</span>.diagnostics |
| <a href=#690 id=690 data-nosnippet>690</a> } |
| <a href=#691 id=691 data-nosnippet>691</a> |
| <a href=#692 id=692 data-nosnippet>692</a> <span class="kw">pub fn </span>tuple_field_access_type<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: TupleId) -> Tys<<span class="lifetime">'db</span>> { |
| <a href=#693 id=693 data-nosnippet>693</a> <span class="self">self</span>.tuple_field_access_types[id.<span class="number">0 </span><span class="kw">as </span>usize].as_ref() |
| <a href=#694 id=694 data-nosnippet>694</a> } |
| <a href=#695 id=695 data-nosnippet>695</a> |
| <a href=#696 id=696 data-nosnippet>696</a> <span class="kw">pub fn </span>pat_adjustment(<span class="kw-2">&</span><span class="self">self</span>, id: PatId) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>[StoredTy]> { |
| <a href=#697 id=697 data-nosnippet>697</a> <span class="self">self</span>.pat_adjustments.get(<span class="kw-2">&</span>id).map(|it| <span class="kw-2">&**</span>it) |
| <a href=#698 id=698 data-nosnippet>698</a> } |
| <a href=#699 id=699 data-nosnippet>699</a> |
| <a href=#700 id=700 data-nosnippet>700</a> <span class="kw">pub fn </span>expr_adjustment(<span class="kw-2">&</span><span class="self">self</span>, id: ExprId) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>[Adjustment]> { |
| <a href=#701 id=701 data-nosnippet>701</a> <span class="self">self</span>.expr_adjustments.get(<span class="kw-2">&</span>id).map(|it| <span class="kw-2">&**</span>it) |
| <a href=#702 id=702 data-nosnippet>702</a> } |
| <a href=#703 id=703 data-nosnippet>703</a> |
| <a href=#704 id=704 data-nosnippet>704</a> <span class="kw">pub fn </span>binding_mode(<span class="kw-2">&</span><span class="self">self</span>, id: PatId) -> <span class="prelude-ty">Option</span><BindingMode> { |
| <a href=#705 id=705 data-nosnippet>705</a> <span class="self">self</span>.binding_modes.get(id).copied() |
| <a href=#706 id=706 data-nosnippet>706</a> } |
| <a href=#707 id=707 data-nosnippet>707</a> |
| <a href=#708 id=708 data-nosnippet>708</a> <span class="comment">// This method is consumed by external tools to run rust-analyzer as a library. Don't remove, please. |
| <a href=#709 id=709 data-nosnippet>709</a> </span><span class="kw">pub fn </span>expression_types<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (ExprId, Ty<<span class="lifetime">'db</span>>)> { |
| <a href=#710 id=710 data-nosnippet>710</a> <span class="self">self</span>.type_of_expr.iter().map(|(k, v)| (k, v.as_ref())) |
| <a href=#711 id=711 data-nosnippet>711</a> } |
| <a href=#712 id=712 data-nosnippet>712</a> |
| <a href=#713 id=713 data-nosnippet>713</a> <span class="comment">// This method is consumed by external tools to run rust-analyzer as a library. Don't remove, please. |
| <a href=#714 id=714 data-nosnippet>714</a> </span><span class="kw">pub fn </span>pattern_types<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (PatId, Ty<<span class="lifetime">'db</span>>)> { |
| <a href=#715 id=715 data-nosnippet>715</a> <span class="self">self</span>.type_of_pat.iter().map(|(k, v)| (k, v.as_ref())) |
| <a href=#716 id=716 data-nosnippet>716</a> } |
| <a href=#717 id=717 data-nosnippet>717</a> |
| <a href=#718 id=718 data-nosnippet>718</a> <span class="comment">// This method is consumed by external tools to run rust-analyzer as a library. Don't remove, please. |
| <a href=#719 id=719 data-nosnippet>719</a> </span><span class="kw">pub fn </span>binding_types<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (BindingId, Ty<<span class="lifetime">'db</span>>)> { |
| <a href=#720 id=720 data-nosnippet>720</a> <span class="self">self</span>.type_of_binding.iter().map(|(k, v)| (k, v.as_ref())) |
| <a href=#721 id=721 data-nosnippet>721</a> } |
| <a href=#722 id=722 data-nosnippet>722</a> |
| <a href=#723 id=723 data-nosnippet>723</a> <span class="comment">// This method is consumed by external tools to run rust-analyzer as a library. Don't remove, please. |
| <a href=#724 id=724 data-nosnippet>724</a> </span><span class="kw">pub fn </span>return_position_impl_trait_types<<span class="lifetime">'db</span>>( |
| <a href=#725 id=725 data-nosnippet>725</a> <span class="kw-2">&</span><span class="lifetime">'db </span><span class="self">self</span>, |
| <a href=#726 id=726 data-nosnippet>726</a> db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, |
| <a href=#727 id=727 data-nosnippet>727</a> ) -> <span class="kw">impl </span>Iterator<Item = (ImplTraitIdx, Ty<<span class="lifetime">'db</span>>)> { |
| <a href=#728 id=728 data-nosnippet>728</a> <span class="self">self</span>.type_of_opaque.iter().filter_map(<span class="kw">move </span>|(<span class="kw-2">&</span>id, ty)| { |
| <a href=#729 id=729 data-nosnippet>729</a> <span class="kw">let </span>ImplTraitId::ReturnTypeImplTrait(<span class="kw">_</span>, rpit_idx) = id.loc(db) <span class="kw">else </span>{ |
| <a href=#730 id=730 data-nosnippet>730</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#731 id=731 data-nosnippet>731</a> }; |
| <a href=#732 id=732 data-nosnippet>732</a> <span class="prelude-val">Some</span>((rpit_idx, ty.as_ref())) |
| <a href=#733 id=733 data-nosnippet>733</a> }) |
| <a href=#734 id=734 data-nosnippet>734</a> } |
| <a href=#735 id=735 data-nosnippet>735</a> |
| <a href=#736 id=736 data-nosnippet>736</a> <span class="kw">pub fn </span>expr_ty<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: ExprId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#737 id=737 data-nosnippet>737</a> <span class="self">self</span>.type_of_expr.get(id).map_or(<span class="self">self</span>.error_ty.as_ref(), |it| it.as_ref()) |
| <a href=#738 id=738 data-nosnippet>738</a> } |
| <a href=#739 id=739 data-nosnippet>739</a> |
| <a href=#740 id=740 data-nosnippet>740</a> <span class="kw">pub fn </span>pat_ty<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: PatId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#741 id=741 data-nosnippet>741</a> <span class="self">self</span>.type_of_pat.get(id).map_or(<span class="self">self</span>.error_ty.as_ref(), |it| it.as_ref()) |
| <a href=#742 id=742 data-nosnippet>742</a> } |
| <a href=#743 id=743 data-nosnippet>743</a> |
| <a href=#744 id=744 data-nosnippet>744</a> <span class="kw">pub fn </span>expr_or_pat_ty<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: ExprOrPatId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#745 id=745 data-nosnippet>745</a> <span class="self">self</span>.type_of_expr_or_pat(id).unwrap_or(<span class="self">self</span>.error_ty.as_ref()) |
| <a href=#746 id=746 data-nosnippet>746</a> } |
| <a href=#747 id=747 data-nosnippet>747</a> |
| <a href=#748 id=748 data-nosnippet>748</a> <span class="kw">pub fn </span>binding_ty<<span class="lifetime">'db</span>>(<span class="kw-2">&</span><span class="self">self</span>, id: BindingId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#749 id=749 data-nosnippet>749</a> <span class="self">self</span>.type_of_binding.get(id).map_or(<span class="self">self</span>.error_ty.as_ref(), |it| it.as_ref()) |
| <a href=#750 id=750 data-nosnippet>750</a> } |
| <a href=#751 id=751 data-nosnippet>751</a>} |
| <a href=#752 id=752 data-nosnippet>752</a> |
| <a href=#753 id=753 data-nosnippet>753</a><span class="doccomment">/// The inference context contains all information needed during type inference. |
| <a href=#754 id=754 data-nosnippet>754</a></span><span class="attr">#[derive(Clone, Debug)] |
| <a href=#755 id=755 data-nosnippet>755</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>InferenceContext<<span class="lifetime">'body</span>, <span class="lifetime">'db</span>> { |
| <a href=#756 id=756 data-nosnippet>756</a> <span class="kw">pub</span>(<span class="kw">crate</span>) db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, |
| <a href=#757 id=757 data-nosnippet>757</a> <span class="kw">pub</span>(<span class="kw">crate</span>) owner: DefWithBodyId, |
| <a href=#758 id=758 data-nosnippet>758</a> <span class="kw">pub</span>(<span class="kw">crate</span>) body: <span class="kw-2">&</span><span class="lifetime">'body </span>Body, |
| <a href=#759 id=759 data-nosnippet>759</a> <span class="doccomment">/// Generally you should not resolve things via this resolver. Instead create a TyLoweringContext |
| <a href=#760 id=760 data-nosnippet>760</a> /// and resolve the path via its methods. This will ensure proper error reporting. |
| <a href=#761 id=761 data-nosnippet>761</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) resolver: Resolver<<span class="lifetime">'db</span>>, |
| <a href=#762 id=762 data-nosnippet>762</a> target_features: OnceCell<(TargetFeatures<<span class="lifetime">'db</span>>, TargetFeatureIsSafeInTarget)>, |
| <a href=#763 id=763 data-nosnippet>763</a> <span class="kw">pub</span>(<span class="kw">crate</span>) unstable_features: MethodResolutionUnstableFeatures, |
| <a href=#764 id=764 data-nosnippet>764</a> <span class="kw">pub</span>(<span class="kw">crate</span>) edition: Edition, |
| <a href=#765 id=765 data-nosnippet>765</a> <span class="kw">pub</span>(<span class="kw">crate</span>) generic_def: GenericDefId, |
| <a href=#766 id=766 data-nosnippet>766</a> <span class="kw">pub</span>(<span class="kw">crate</span>) table: unify::InferenceTable<<span class="lifetime">'db</span>>, |
| <a href=#767 id=767 data-nosnippet>767</a> <span class="kw">pub</span>(<span class="kw">crate</span>) lang_items: <span class="kw-2">&</span><span class="lifetime">'db </span>LangItems, |
| <a href=#768 id=768 data-nosnippet>768</a> <span class="doccomment">/// The traits in scope, disregarding block modules. This is used for caching purposes. |
| <a href=#769 id=769 data-nosnippet>769</a> </span>traits_in_scope: FxHashSet<TraitId>, |
| <a href=#770 id=770 data-nosnippet>770</a> <span class="kw">pub</span>(<span class="kw">crate</span>) result: InferenceResult, |
| <a href=#771 id=771 data-nosnippet>771</a> tuple_field_accesses_rev: |
| <a href=#772 id=772 data-nosnippet>772</a> IndexSet<Tys<<span class="lifetime">'db</span>>, std::hash::BuildHasherDefault<rustc_hash::FxHasher>>, |
| <a href=#773 id=773 data-nosnippet>773</a> <span class="doccomment">/// The return type of the function being inferred, the closure or async block if we're |
| <a href=#774 id=774 data-nosnippet>774</a> /// currently within one. |
| <a href=#775 id=775 data-nosnippet>775</a> /// |
| <a href=#776 id=776 data-nosnippet>776</a> /// We might consider using a nested inference context for checking |
| <a href=#777 id=777 data-nosnippet>777</a> /// closures so we can swap all shared things out at once. |
| <a href=#778 id=778 data-nosnippet>778</a> </span>return_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#779 id=779 data-nosnippet>779</a> <span class="doccomment">/// If `Some`, this stores coercion information for returned |
| <a href=#780 id=780 data-nosnippet>780</a> /// expressions. If `None`, this is in a context where return is |
| <a href=#781 id=781 data-nosnippet>781</a> /// inappropriate, such as a const expression. |
| <a href=#782 id=782 data-nosnippet>782</a> </span>return_coercion: <span class="prelude-ty">Option</span><DynamicCoerceMany<<span class="lifetime">'db</span>>>, |
| <a href=#783 id=783 data-nosnippet>783</a> <span class="doccomment">/// The resume type and the yield type, respectively, of the coroutine being inferred. |
| <a href=#784 id=784 data-nosnippet>784</a> </span>resume_yield_tys: <span class="prelude-ty">Option</span><(Ty<<span class="lifetime">'db</span>>, Ty<<span class="lifetime">'db</span>>)>, |
| <a href=#785 id=785 data-nosnippet>785</a> diverges: Diverges, |
| <a href=#786 id=786 data-nosnippet>786</a> breakables: Vec<BreakableContext<<span class="lifetime">'db</span>>>, |
| <a href=#787 id=787 data-nosnippet>787</a> types: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">crate</span>::next_solver::DefaultAny<<span class="lifetime">'db</span>>, |
| <a href=#788 id=788 data-nosnippet>788</a> |
| <a href=#789 id=789 data-nosnippet>789</a> <span class="doccomment">/// Whether we are inside the pattern of a destructuring assignment. |
| <a href=#790 id=790 data-nosnippet>790</a> </span>inside_assignment: bool, |
| <a href=#791 id=791 data-nosnippet>791</a> |
| <a href=#792 id=792 data-nosnippet>792</a> deferred_cast_checks: Vec<CastCheck<<span class="lifetime">'db</span>>>, |
| <a href=#793 id=793 data-nosnippet>793</a> |
| <a href=#794 id=794 data-nosnippet>794</a> <span class="comment">// fields related to closure capture |
| <a href=#795 id=795 data-nosnippet>795</a> </span>current_captures: Vec<CapturedItemWithoutTy>, |
| <a href=#796 id=796 data-nosnippet>796</a> <span class="doccomment">/// A stack that has an entry for each projection in the current capture. |
| <a href=#797 id=797 data-nosnippet>797</a> /// |
| <a href=#798 id=798 data-nosnippet>798</a> /// For example, in `a.b.c`, we capture the spans of `a`, `a.b`, and `a.b.c`. |
| <a href=#799 id=799 data-nosnippet>799</a> /// We do that because sometimes we truncate projections (when a closure captures |
| <a href=#800 id=800 data-nosnippet>800</a> /// both `a.b` and `a.b.c`), and we want to provide accurate spans in this case. |
| <a href=#801 id=801 data-nosnippet>801</a> </span>current_capture_span_stack: Vec<MirSpan>, |
| <a href=#802 id=802 data-nosnippet>802</a> current_closure: <span class="prelude-ty">Option</span><InternedClosureId>, |
| <a href=#803 id=803 data-nosnippet>803</a> <span class="doccomment">/// Stores the list of closure ids that need to be analyzed before this closure. See the |
| <a href=#804 id=804 data-nosnippet>804</a> /// comment on `InferenceContext::sort_closures` |
| <a href=#805 id=805 data-nosnippet>805</a> </span>closure_dependencies: FxHashMap<InternedClosureId, Vec<InternedClosureId>>, |
| <a href=#806 id=806 data-nosnippet>806</a> deferred_closures: FxHashMap<InternedClosureId, Vec<(Ty<<span class="lifetime">'db</span>>, Ty<<span class="lifetime">'db</span>>, Vec<Ty<<span class="lifetime">'db</span>>>, ExprId)>>, |
| <a href=#807 id=807 data-nosnippet>807</a> |
| <a href=#808 id=808 data-nosnippet>808</a> diagnostics: Diagnostics, |
| <a href=#809 id=809 data-nosnippet>809</a>} |
| <a href=#810 id=810 data-nosnippet>810</a> |
| <a href=#811 id=811 data-nosnippet>811</a><span class="attr">#[derive(Clone, Debug)] |
| <a href=#812 id=812 data-nosnippet>812</a></span><span class="kw">struct </span>BreakableContext<<span class="lifetime">'db</span>> { |
| <a href=#813 id=813 data-nosnippet>813</a> <span class="doccomment">/// Whether this context contains at least one break expression. |
| <a href=#814 id=814 data-nosnippet>814</a> </span>may_break: bool, |
| <a href=#815 id=815 data-nosnippet>815</a> <span class="doccomment">/// The coercion target of the context. |
| <a href=#816 id=816 data-nosnippet>816</a> </span>coerce: <span class="prelude-ty">Option</span><DynamicCoerceMany<<span class="lifetime">'db</span>>>, |
| <a href=#817 id=817 data-nosnippet>817</a> <span class="doccomment">/// The optional label of the context. |
| <a href=#818 id=818 data-nosnippet>818</a> </span>label: <span class="prelude-ty">Option</span><LabelId>, |
| <a href=#819 id=819 data-nosnippet>819</a> kind: BreakableKind, |
| <a href=#820 id=820 data-nosnippet>820</a>} |
| <a href=#821 id=821 data-nosnippet>821</a> |
| <a href=#822 id=822 data-nosnippet>822</a><span class="attr">#[derive(Clone, Debug)] |
| <a href=#823 id=823 data-nosnippet>823</a></span><span class="kw">enum </span>BreakableKind { |
| <a href=#824 id=824 data-nosnippet>824</a> Block, |
| <a href=#825 id=825 data-nosnippet>825</a> Loop, |
| <a href=#826 id=826 data-nosnippet>826</a> <span class="doccomment">/// A border is something like an async block, closure etc. Anything that prevents |
| <a href=#827 id=827 data-nosnippet>827</a> /// breaking/continuing through |
| <a href=#828 id=828 data-nosnippet>828</a> </span>Border, |
| <a href=#829 id=829 data-nosnippet>829</a>} |
| <a href=#830 id=830 data-nosnippet>830</a> |
| <a href=#831 id=831 data-nosnippet>831</a><span class="kw">fn </span>find_breakable<<span class="lifetime">'a</span>, <span class="lifetime">'db</span>>( |
| <a href=#832 id=832 data-nosnippet>832</a> ctxs: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>[BreakableContext<<span class="lifetime">'db</span>>], |
| <a href=#833 id=833 data-nosnippet>833</a> label: <span class="prelude-ty">Option</span><LabelId>, |
| <a href=#834 id=834 data-nosnippet>834</a>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>BreakableContext<<span class="lifetime">'db</span>>> { |
| <a href=#835 id=835 data-nosnippet>835</a> <span class="kw">let </span><span class="kw-2">mut </span>ctxs = ctxs |
| <a href=#836 id=836 data-nosnippet>836</a> .iter_mut() |
| <a href=#837 id=837 data-nosnippet>837</a> .rev() |
| <a href=#838 id=838 data-nosnippet>838</a> .take_while(|it| <span class="macro">matches!</span>(it.kind, BreakableKind::Block | BreakableKind::Loop)); |
| <a href=#839 id=839 data-nosnippet>839</a> <span class="kw">match </span>label { |
| <a href=#840 id=840 data-nosnippet>840</a> <span class="prelude-val">Some</span>(<span class="kw">_</span>) => ctxs.find(|ctx| ctx.label == label), |
| <a href=#841 id=841 data-nosnippet>841</a> <span class="prelude-val">None </span>=> ctxs.find(|ctx| <span class="macro">matches!</span>(ctx.kind, BreakableKind::Loop)), |
| <a href=#842 id=842 data-nosnippet>842</a> } |
| <a href=#843 id=843 data-nosnippet>843</a>} |
| <a href=#844 id=844 data-nosnippet>844</a> |
| <a href=#845 id=845 data-nosnippet>845</a><span class="kw">fn </span>find_continuable<<span class="lifetime">'a</span>, <span class="lifetime">'db</span>>( |
| <a href=#846 id=846 data-nosnippet>846</a> ctxs: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>[BreakableContext<<span class="lifetime">'db</span>>], |
| <a href=#847 id=847 data-nosnippet>847</a> label: <span class="prelude-ty">Option</span><LabelId>, |
| <a href=#848 id=848 data-nosnippet>848</a>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>BreakableContext<<span class="lifetime">'db</span>>> { |
| <a href=#849 id=849 data-nosnippet>849</a> <span class="kw">match </span>label { |
| <a href=#850 id=850 data-nosnippet>850</a> <span class="prelude-val">Some</span>(<span class="kw">_</span>) => find_breakable(ctxs, label).filter(|it| <span class="macro">matches!</span>(it.kind, BreakableKind::Loop)), |
| <a href=#851 id=851 data-nosnippet>851</a> <span class="prelude-val">None </span>=> find_breakable(ctxs, label), |
| <a href=#852 id=852 data-nosnippet>852</a> } |
| <a href=#853 id=853 data-nosnippet>853</a>} |
| <a href=#854 id=854 data-nosnippet>854</a> |
| <a href=#855 id=855 data-nosnippet>855</a><span class="kw">impl</span><<span class="lifetime">'body</span>, <span class="lifetime">'db</span>> InferenceContext<<span class="lifetime">'body</span>, <span class="lifetime">'db</span>> { |
| <a href=#856 id=856 data-nosnippet>856</a> <span class="kw">fn </span>new( |
| <a href=#857 id=857 data-nosnippet>857</a> db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, |
| <a href=#858 id=858 data-nosnippet>858</a> owner: DefWithBodyId, |
| <a href=#859 id=859 data-nosnippet>859</a> body: <span class="kw-2">&</span><span class="lifetime">'body </span>Body, |
| <a href=#860 id=860 data-nosnippet>860</a> resolver: Resolver<<span class="lifetime">'db</span>>, |
| <a href=#861 id=861 data-nosnippet>861</a> ) -> <span class="self">Self </span>{ |
| <a href=#862 id=862 data-nosnippet>862</a> <span class="kw">let </span>trait_env = db.trait_environment_for_body(owner); |
| <a href=#863 id=863 data-nosnippet>863</a> <span class="kw">let </span>table = unify::InferenceTable::new(db, trait_env, resolver.krate(), <span class="prelude-val">Some</span>(owner)); |
| <a href=#864 id=864 data-nosnippet>864</a> <span class="kw">let </span>types = <span class="kw">crate</span>::next_solver::default_types(db); |
| <a href=#865 id=865 data-nosnippet>865</a> InferenceContext { |
| <a href=#866 id=866 data-nosnippet>866</a> result: InferenceResult::new(types.types.error), |
| <a href=#867 id=867 data-nosnippet>867</a> return_ty: types.types.error, <span class="comment">// set in collect_* calls |
| <a href=#868 id=868 data-nosnippet>868</a> </span>types, |
| <a href=#869 id=869 data-nosnippet>869</a> target_features: OnceCell::new(), |
| <a href=#870 id=870 data-nosnippet>870</a> unstable_features: MethodResolutionUnstableFeatures::from_def_map( |
| <a href=#871 id=871 data-nosnippet>871</a> resolver.top_level_def_map(), |
| <a href=#872 id=872 data-nosnippet>872</a> ), |
| <a href=#873 id=873 data-nosnippet>873</a> lang_items: table.interner().lang_items(), |
| <a href=#874 id=874 data-nosnippet>874</a> edition: resolver.krate().data(db).edition, |
| <a href=#875 id=875 data-nosnippet>875</a> table, |
| <a href=#876 id=876 data-nosnippet>876</a> tuple_field_accesses_rev: Default::default(), |
| <a href=#877 id=877 data-nosnippet>877</a> resume_yield_tys: <span class="prelude-val">None</span>, |
| <a href=#878 id=878 data-nosnippet>878</a> return_coercion: <span class="prelude-val">None</span>, |
| <a href=#879 id=879 data-nosnippet>879</a> db, |
| <a href=#880 id=880 data-nosnippet>880</a> owner, |
| <a href=#881 id=881 data-nosnippet>881</a> generic_def: <span class="kw">match </span>owner { |
| <a href=#882 id=882 data-nosnippet>882</a> DefWithBodyId::FunctionId(it) => it.into(), |
| <a href=#883 id=883 data-nosnippet>883</a> DefWithBodyId::StaticId(it) => it.into(), |
| <a href=#884 id=884 data-nosnippet>884</a> DefWithBodyId::ConstId(it) => it.into(), |
| <a href=#885 id=885 data-nosnippet>885</a> DefWithBodyId::VariantId(it) => it.lookup(db).parent.into(), |
| <a href=#886 id=886 data-nosnippet>886</a> }, |
| <a href=#887 id=887 data-nosnippet>887</a> body, |
| <a href=#888 id=888 data-nosnippet>888</a> traits_in_scope: resolver.traits_in_scope(db), |
| <a href=#889 id=889 data-nosnippet>889</a> resolver, |
| <a href=#890 id=890 data-nosnippet>890</a> diverges: Diverges::Maybe, |
| <a href=#891 id=891 data-nosnippet>891</a> breakables: Vec::new(), |
| <a href=#892 id=892 data-nosnippet>892</a> deferred_cast_checks: Vec::new(), |
| <a href=#893 id=893 data-nosnippet>893</a> current_captures: Vec::new(), |
| <a href=#894 id=894 data-nosnippet>894</a> current_capture_span_stack: Vec::new(), |
| <a href=#895 id=895 data-nosnippet>895</a> current_closure: <span class="prelude-val">None</span>, |
| <a href=#896 id=896 data-nosnippet>896</a> deferred_closures: FxHashMap::default(), |
| <a href=#897 id=897 data-nosnippet>897</a> closure_dependencies: FxHashMap::default(), |
| <a href=#898 id=898 data-nosnippet>898</a> inside_assignment: <span class="bool-val">false</span>, |
| <a href=#899 id=899 data-nosnippet>899</a> diagnostics: Diagnostics::default(), |
| <a href=#900 id=900 data-nosnippet>900</a> } |
| <a href=#901 id=901 data-nosnippet>901</a> } |
| <a href=#902 id=902 data-nosnippet>902</a> |
| <a href=#903 id=903 data-nosnippet>903</a> <span class="attr">#[inline] |
| <a href=#904 id=904 data-nosnippet>904</a> </span><span class="kw">fn </span>krate(<span class="kw-2">&</span><span class="self">self</span>) -> Crate { |
| <a href=#905 id=905 data-nosnippet>905</a> <span class="self">self</span>.resolver.krate() |
| <a href=#906 id=906 data-nosnippet>906</a> } |
| <a href=#907 id=907 data-nosnippet>907</a> |
| <a href=#908 id=908 data-nosnippet>908</a> <span class="kw">fn </span>target_features(<span class="kw-2">&</span><span class="self">self</span>) -> (<span class="kw-2">&</span>TargetFeatures<<span class="lifetime">'db</span>>, TargetFeatureIsSafeInTarget) { |
| <a href=#909 id=909 data-nosnippet>909</a> <span class="kw">let </span>(target_features, target_feature_is_safe) = <span class="self">self</span>.target_features.get_or_init(|| { |
| <a href=#910 id=910 data-nosnippet>910</a> <span class="kw">let </span>target_features = <span class="kw">match </span><span class="self">self</span>.owner { |
| <a href=#911 id=911 data-nosnippet>911</a> DefWithBodyId::FunctionId(id) => TargetFeatures::from_fn(<span class="self">self</span>.db, id), |
| <a href=#912 id=912 data-nosnippet>912</a> <span class="kw">_ </span>=> TargetFeatures::default(), |
| <a href=#913 id=913 data-nosnippet>913</a> }; |
| <a href=#914 id=914 data-nosnippet>914</a> <span class="kw">let </span>target_feature_is_safe = <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.krate().workspace_data(<span class="self">self</span>.db).target { |
| <a href=#915 id=915 data-nosnippet>915</a> <span class="prelude-val">Ok</span>(target) => <span class="kw">crate</span>::utils::target_feature_is_safe_in_target(target), |
| <a href=#916 id=916 data-nosnippet>916</a> <span class="prelude-val">Err</span>(<span class="kw">_</span>) => TargetFeatureIsSafeInTarget::No, |
| <a href=#917 id=917 data-nosnippet>917</a> }; |
| <a href=#918 id=918 data-nosnippet>918</a> (target_features, target_feature_is_safe) |
| <a href=#919 id=919 data-nosnippet>919</a> }); |
| <a href=#920 id=920 data-nosnippet>920</a> (target_features, <span class="kw-2">*</span>target_feature_is_safe) |
| <a href=#921 id=921 data-nosnippet>921</a> } |
| <a href=#922 id=922 data-nosnippet>922</a> |
| <a href=#923 id=923 data-nosnippet>923</a> <span class="attr">#[inline] |
| <a href=#924 id=924 data-nosnippet>924</a> </span><span class="kw">fn </span>set_tainted_by_errors(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#925 id=925 data-nosnippet>925</a> <span class="self">self</span>.result.has_errors = <span class="bool-val">true</span>; |
| <a href=#926 id=926 data-nosnippet>926</a> } |
| <a href=#927 id=927 data-nosnippet>927</a> |
| <a href=#928 id=928 data-nosnippet>928</a> <span class="doccomment">/// Clones `self` and calls `resolve_all()` on it. |
| <a href=#929 id=929 data-nosnippet>929</a> </span><span class="comment">// FIXME: Remove this. |
| <a href=#930 id=930 data-nosnippet>930</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>fixme_resolve_all_clone(<span class="kw-2">&</span><span class="self">self</span>) -> InferenceResult { |
| <a href=#931 id=931 data-nosnippet>931</a> <span class="kw">let </span><span class="kw-2">mut </span>ctx = <span class="self">self</span>.clone(); |
| <a href=#932 id=932 data-nosnippet>932</a> |
| <a href=#933 id=933 data-nosnippet>933</a> ctx.type_inference_fallback(); |
| <a href=#934 id=934 data-nosnippet>934</a> |
| <a href=#935 id=935 data-nosnippet>935</a> <span class="comment">// Comment from rustc: |
| <a href=#936 id=936 data-nosnippet>936</a> // Even though coercion casts provide type hints, we check casts after fallback for |
| <a href=#937 id=937 data-nosnippet>937</a> // backwards compatibility. This makes fallback a stronger type hint than a cast coercion. |
| <a href=#938 id=938 data-nosnippet>938</a> </span><span class="kw">let </span>cast_checks = std::mem::take(<span class="kw-2">&mut </span>ctx.deferred_cast_checks); |
| <a href=#939 id=939 data-nosnippet>939</a> <span class="kw">for </span><span class="kw-2">mut </span>cast <span class="kw">in </span>cast_checks.into_iter() { |
| <a href=#940 id=940 data-nosnippet>940</a> <span class="kw">if let </span><span class="prelude-val">Err</span>(diag) = cast.check(<span class="kw-2">&mut </span>ctx) { |
| <a href=#941 id=941 data-nosnippet>941</a> ctx.diagnostics.push(diag); |
| <a href=#942 id=942 data-nosnippet>942</a> } |
| <a href=#943 id=943 data-nosnippet>943</a> } |
| <a href=#944 id=944 data-nosnippet>944</a> |
| <a href=#945 id=945 data-nosnippet>945</a> ctx.table.select_obligations_where_possible(); |
| <a href=#946 id=946 data-nosnippet>946</a> |
| <a href=#947 id=947 data-nosnippet>947</a> ctx.resolve_all() |
| <a href=#948 id=948 data-nosnippet>948</a> } |
| <a href=#949 id=949 data-nosnippet>949</a> |
| <a href=#950 id=950 data-nosnippet>950</a> <span class="comment">// FIXME: This function should be private in module. It is currently only used in the consteval, since we need |
| <a href=#951 id=951 data-nosnippet>951</a> // `InferenceResult` in the middle of inference. See the fixme comment in `consteval::eval_to_const`. If you |
| <a href=#952 id=952 data-nosnippet>952</a> // used this function for another workaround, mention it here. If you really need this function and believe that |
| <a href=#953 id=953 data-nosnippet>953</a> // there is no problem in it being `pub(crate)`, remove this comment. |
| <a href=#954 id=954 data-nosnippet>954</a> </span><span class="kw">fn </span>resolve_all(<span class="self">self</span>) -> InferenceResult { |
| <a href=#955 id=955 data-nosnippet>955</a> <span class="kw">let </span>InferenceContext { |
| <a href=#956 id=956 data-nosnippet>956</a> <span class="kw-2">mut </span>table, <span class="kw-2">mut </span>result, tuple_field_accesses_rev, diagnostics, .. |
| <a href=#957 id=957 data-nosnippet>957</a> } = <span class="self">self</span>; |
| <a href=#958 id=958 data-nosnippet>958</a> <span class="kw">let </span><span class="kw-2">mut </span>diagnostics = diagnostics.finish(); |
| <a href=#959 id=959 data-nosnippet>959</a> <span class="comment">// Destructure every single field so whenever new fields are added to `InferenceResult` we |
| <a href=#960 id=960 data-nosnippet>960</a> // don't forget to handle them here. |
| <a href=#961 id=961 data-nosnippet>961</a> </span><span class="kw">let </span>InferenceResult { |
| <a href=#962 id=962 data-nosnippet>962</a> method_resolutions, |
| <a href=#963 id=963 data-nosnippet>963</a> field_resolutions: <span class="kw">_</span>, |
| <a href=#964 id=964 data-nosnippet>964</a> variant_resolutions: <span class="kw">_</span>, |
| <a href=#965 id=965 data-nosnippet>965</a> assoc_resolutions, |
| <a href=#966 id=966 data-nosnippet>966</a> type_of_expr, |
| <a href=#967 id=967 data-nosnippet>967</a> type_of_pat, |
| <a href=#968 id=968 data-nosnippet>968</a> type_of_binding, |
| <a href=#969 id=969 data-nosnippet>969</a> type_of_type_placeholder, |
| <a href=#970 id=970 data-nosnippet>970</a> type_of_opaque, |
| <a href=#971 id=971 data-nosnippet>971</a> type_mismatches, |
| <a href=#972 id=972 data-nosnippet>972</a> has_errors, |
| <a href=#973 id=973 data-nosnippet>973</a> error_ty: <span class="kw">_</span>, |
| <a href=#974 id=974 data-nosnippet>974</a> pat_adjustments, |
| <a href=#975 id=975 data-nosnippet>975</a> binding_modes: <span class="kw">_</span>, |
| <a href=#976 id=976 data-nosnippet>976</a> expr_adjustments, |
| <a href=#977 id=977 data-nosnippet>977</a> <span class="comment">// Types in `closure_info` have already been `resolve_completely()`'d during |
| <a href=#978 id=978 data-nosnippet>978</a> // `InferenceContext::infer_closures()` (in `HirPlace::ty()` specifically), so no need |
| <a href=#979 id=979 data-nosnippet>979</a> // to resolve them here. |
| <a href=#980 id=980 data-nosnippet>980</a> </span>closure_info: <span class="kw">_</span>, |
| <a href=#981 id=981 data-nosnippet>981</a> mutated_bindings_in_closure: <span class="kw">_</span>, |
| <a href=#982 id=982 data-nosnippet>982</a> tuple_field_access_types: <span class="kw">_</span>, |
| <a href=#983 id=983 data-nosnippet>983</a> coercion_casts: <span class="kw">_</span>, |
| <a href=#984 id=984 data-nosnippet>984</a> diagnostics: <span class="kw">_</span>, |
| <a href=#985 id=985 data-nosnippet>985</a> } = <span class="kw-2">&mut </span>result; |
| <a href=#986 id=986 data-nosnippet>986</a> |
| <a href=#987 id=987 data-nosnippet>987</a> <span class="kw">for </span>ty <span class="kw">in </span>type_of_expr.values_mut() { |
| <a href=#988 id=988 data-nosnippet>988</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#989 id=989 data-nosnippet>989</a> <span class="kw-2">*</span>has_errors = <span class="kw-2">*</span>has_errors || ty.as_ref().references_non_lt_error(); |
| <a href=#990 id=990 data-nosnippet>990</a> } |
| <a href=#991 id=991 data-nosnippet>991</a> type_of_expr.shrink_to_fit(); |
| <a href=#992 id=992 data-nosnippet>992</a> <span class="kw">for </span>ty <span class="kw">in </span>type_of_pat.values_mut() { |
| <a href=#993 id=993 data-nosnippet>993</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#994 id=994 data-nosnippet>994</a> <span class="kw-2">*</span>has_errors = <span class="kw-2">*</span>has_errors || ty.as_ref().references_non_lt_error(); |
| <a href=#995 id=995 data-nosnippet>995</a> } |
| <a href=#996 id=996 data-nosnippet>996</a> type_of_pat.shrink_to_fit(); |
| <a href=#997 id=997 data-nosnippet>997</a> <span class="kw">for </span>ty <span class="kw">in </span>type_of_binding.values_mut() { |
| <a href=#998 id=998 data-nosnippet>998</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#999 id=999 data-nosnippet>999</a> <span class="kw-2">*</span>has_errors = <span class="kw-2">*</span>has_errors || ty.as_ref().references_non_lt_error(); |
| <a href=#1000 id=1000 data-nosnippet>1000</a> } |
| <a href=#1001 id=1001 data-nosnippet>1001</a> type_of_binding.shrink_to_fit(); |
| <a href=#1002 id=1002 data-nosnippet>1002</a> <span class="kw">for </span>ty <span class="kw">in </span>type_of_type_placeholder.values_mut() { |
| <a href=#1003 id=1003 data-nosnippet>1003</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#1004 id=1004 data-nosnippet>1004</a> <span class="kw-2">*</span>has_errors = <span class="kw-2">*</span>has_errors || ty.as_ref().references_non_lt_error(); |
| <a href=#1005 id=1005 data-nosnippet>1005</a> } |
| <a href=#1006 id=1006 data-nosnippet>1006</a> type_of_type_placeholder.shrink_to_fit(); |
| <a href=#1007 id=1007 data-nosnippet>1007</a> type_of_opaque.shrink_to_fit(); |
| <a href=#1008 id=1008 data-nosnippet>1008</a> |
| <a href=#1009 id=1009 data-nosnippet>1009</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(type_mismatches) = type_mismatches { |
| <a href=#1010 id=1010 data-nosnippet>1010</a> <span class="kw-2">*</span>has_errors = <span class="bool-val">true</span>; |
| <a href=#1011 id=1011 data-nosnippet>1011</a> <span class="kw">for </span>mismatch <span class="kw">in </span>type_mismatches.values_mut() { |
| <a href=#1012 id=1012 data-nosnippet>1012</a> mismatch.expected = table.resolve_completely(mismatch.expected.as_ref()).store(); |
| <a href=#1013 id=1013 data-nosnippet>1013</a> mismatch.actual = table.resolve_completely(mismatch.actual.as_ref()).store(); |
| <a href=#1014 id=1014 data-nosnippet>1014</a> } |
| <a href=#1015 id=1015 data-nosnippet>1015</a> type_mismatches.shrink_to_fit(); |
| <a href=#1016 id=1016 data-nosnippet>1016</a> } |
| <a href=#1017 id=1017 data-nosnippet>1017</a> diagnostics.retain_mut(|diagnostic| { |
| <a href=#1018 id=1018 data-nosnippet>1018</a> <span class="kw">use </span>InferenceDiagnostic::<span class="kw-2">*</span>; |
| <a href=#1019 id=1019 data-nosnippet>1019</a> <span class="kw">match </span>diagnostic { |
| <a href=#1020 id=1020 data-nosnippet>1020</a> ExpectedFunction { found: ty, .. } |
| <a href=#1021 id=1021 data-nosnippet>1021</a> | UnresolvedField { receiver: ty, .. } |
| <a href=#1022 id=1022 data-nosnippet>1022</a> | UnresolvedMethodCall { receiver: ty, .. } => { |
| <a href=#1023 id=1023 data-nosnippet>1023</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#1024 id=1024 data-nosnippet>1024</a> <span class="comment">// FIXME: Remove this when we are on par with rustc in terms of inference |
| <a href=#1025 id=1025 data-nosnippet>1025</a> </span><span class="kw">if </span>ty.as_ref().references_non_lt_error() { |
| <a href=#1026 id=1026 data-nosnippet>1026</a> <span class="kw">return </span><span class="bool-val">false</span>; |
| <a href=#1027 id=1027 data-nosnippet>1027</a> } |
| <a href=#1028 id=1028 data-nosnippet>1028</a> |
| <a href=#1029 id=1029 data-nosnippet>1029</a> <span class="kw">if let </span>UnresolvedMethodCall { field_with_same_name, .. } = diagnostic |
| <a href=#1030 id=1030 data-nosnippet>1030</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(ty) = field_with_same_name |
| <a href=#1031 id=1031 data-nosnippet>1031</a> { |
| <a href=#1032 id=1032 data-nosnippet>1032</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#1033 id=1033 data-nosnippet>1033</a> <span class="kw">if </span>ty.as_ref().references_non_lt_error() { |
| <a href=#1034 id=1034 data-nosnippet>1034</a> <span class="kw-2">*</span>field_with_same_name = <span class="prelude-val">None</span>; |
| <a href=#1035 id=1035 data-nosnippet>1035</a> } |
| <a href=#1036 id=1036 data-nosnippet>1036</a> } |
| <a href=#1037 id=1037 data-nosnippet>1037</a> } |
| <a href=#1038 id=1038 data-nosnippet>1038</a> TypedHole { expected: ty, .. } => { |
| <a href=#1039 id=1039 data-nosnippet>1039</a> <span class="kw-2">*</span>ty = table.resolve_completely(ty.as_ref()).store(); |
| <a href=#1040 id=1040 data-nosnippet>1040</a> } |
| <a href=#1041 id=1041 data-nosnippet>1041</a> <span class="kw">_ </span>=> (), |
| <a href=#1042 id=1042 data-nosnippet>1042</a> } |
| <a href=#1043 id=1043 data-nosnippet>1043</a> <span class="bool-val">true |
| <a href=#1044 id=1044 data-nosnippet>1044</a> </span>}); |
| <a href=#1045 id=1045 data-nosnippet>1045</a> diagnostics.shrink_to_fit(); |
| <a href=#1046 id=1046 data-nosnippet>1046</a> <span class="kw">for </span>(<span class="kw">_</span>, subst) <span class="kw">in </span>method_resolutions.values_mut() { |
| <a href=#1047 id=1047 data-nosnippet>1047</a> <span class="kw-2">*</span>subst = table.resolve_completely(subst.as_ref()).store(); |
| <a href=#1048 id=1048 data-nosnippet>1048</a> <span class="kw-2">*</span>has_errors = |
| <a href=#1049 id=1049 data-nosnippet>1049</a> <span class="kw-2">*</span>has_errors || subst.as_ref().types().any(|ty| ty.references_non_lt_error()); |
| <a href=#1050 id=1050 data-nosnippet>1050</a> } |
| <a href=#1051 id=1051 data-nosnippet>1051</a> method_resolutions.shrink_to_fit(); |
| <a href=#1052 id=1052 data-nosnippet>1052</a> <span class="kw">for </span>(<span class="kw">_</span>, subst) <span class="kw">in </span>assoc_resolutions.values_mut() { |
| <a href=#1053 id=1053 data-nosnippet>1053</a> <span class="kw-2">*</span>subst = table.resolve_completely(subst.as_ref()).store(); |
| <a href=#1054 id=1054 data-nosnippet>1054</a> <span class="kw-2">*</span>has_errors = |
| <a href=#1055 id=1055 data-nosnippet>1055</a> <span class="kw-2">*</span>has_errors || subst.as_ref().types().any(|ty| ty.references_non_lt_error()); |
| <a href=#1056 id=1056 data-nosnippet>1056</a> } |
| <a href=#1057 id=1057 data-nosnippet>1057</a> assoc_resolutions.shrink_to_fit(); |
| <a href=#1058 id=1058 data-nosnippet>1058</a> <span class="kw">for </span>adjustment <span class="kw">in </span>expr_adjustments.values_mut().flatten() { |
| <a href=#1059 id=1059 data-nosnippet>1059</a> adjustment.target = table.resolve_completely(adjustment.target.as_ref()).store(); |
| <a href=#1060 id=1060 data-nosnippet>1060</a> <span class="kw-2">*</span>has_errors = <span class="kw-2">*</span>has_errors || adjustment.target.as_ref().references_non_lt_error(); |
| <a href=#1061 id=1061 data-nosnippet>1061</a> } |
| <a href=#1062 id=1062 data-nosnippet>1062</a> expr_adjustments.shrink_to_fit(); |
| <a href=#1063 id=1063 data-nosnippet>1063</a> <span class="kw">for </span>adjustment <span class="kw">in </span>pat_adjustments.values_mut().flatten() { |
| <a href=#1064 id=1064 data-nosnippet>1064</a> <span class="kw-2">*</span>adjustment = table.resolve_completely(adjustment.as_ref()).store(); |
| <a href=#1065 id=1065 data-nosnippet>1065</a> <span class="kw-2">*</span>has_errors = <span class="kw-2">*</span>has_errors || adjustment.as_ref().references_non_lt_error(); |
| <a href=#1066 id=1066 data-nosnippet>1066</a> } |
| <a href=#1067 id=1067 data-nosnippet>1067</a> pat_adjustments.shrink_to_fit(); |
| <a href=#1068 id=1068 data-nosnippet>1068</a> result.tuple_field_access_types = tuple_field_accesses_rev |
| <a href=#1069 id=1069 data-nosnippet>1069</a> .into_iter() |
| <a href=#1070 id=1070 data-nosnippet>1070</a> .map(|subst| table.resolve_completely(subst).store()) |
| <a href=#1071 id=1071 data-nosnippet>1071</a> .inspect(|subst| { |
| <a href=#1072 id=1072 data-nosnippet>1072</a> <span class="kw-2">*</span>has_errors = |
| <a href=#1073 id=1073 data-nosnippet>1073</a> <span class="kw-2">*</span>has_errors || subst.as_ref().iter().any(|ty| ty.references_non_lt_error()); |
| <a href=#1074 id=1074 data-nosnippet>1074</a> }) |
| <a href=#1075 id=1075 data-nosnippet>1075</a> .collect(); |
| <a href=#1076 id=1076 data-nosnippet>1076</a> result.tuple_field_access_types.shrink_to_fit(); |
| <a href=#1077 id=1077 data-nosnippet>1077</a> |
| <a href=#1078 id=1078 data-nosnippet>1078</a> result.diagnostics = diagnostics; |
| <a href=#1079 id=1079 data-nosnippet>1079</a> |
| <a href=#1080 id=1080 data-nosnippet>1080</a> result |
| <a href=#1081 id=1081 data-nosnippet>1081</a> } |
| <a href=#1082 id=1082 data-nosnippet>1082</a> |
| <a href=#1083 id=1083 data-nosnippet>1083</a> <span class="kw">fn </span>collect_const(<span class="kw-2">&mut </span><span class="self">self</span>, id: ConstId, data: <span class="kw-2">&</span>ConstSignature) { |
| <a href=#1084 id=1084 data-nosnippet>1084</a> <span class="kw">let </span>return_ty = <span class="self">self</span>.make_ty( |
| <a href=#1085 id=1085 data-nosnippet>1085</a> data.type_ref, |
| <a href=#1086 id=1086 data-nosnippet>1086</a> <span class="kw-2">&</span>data.store, |
| <a href=#1087 id=1087 data-nosnippet>1087</a> InferenceTyDiagnosticSource::Signature, |
| <a href=#1088 id=1088 data-nosnippet>1088</a> LifetimeElisionKind::for_const(<span class="self">self</span>.interner(), id.loc(<span class="self">self</span>.db).container), |
| <a href=#1089 id=1089 data-nosnippet>1089</a> ); |
| <a href=#1090 id=1090 data-nosnippet>1090</a> |
| <a href=#1091 id=1091 data-nosnippet>1091</a> <span class="self">self</span>.return_ty = return_ty; |
| <a href=#1092 id=1092 data-nosnippet>1092</a> } |
| <a href=#1093 id=1093 data-nosnippet>1093</a> |
| <a href=#1094 id=1094 data-nosnippet>1094</a> <span class="kw">fn </span>collect_static(<span class="kw-2">&mut </span><span class="self">self</span>, data: <span class="kw-2">&</span>StaticSignature) { |
| <a href=#1095 id=1095 data-nosnippet>1095</a> <span class="kw">let </span>return_ty = <span class="self">self</span>.make_ty( |
| <a href=#1096 id=1096 data-nosnippet>1096</a> data.type_ref, |
| <a href=#1097 id=1097 data-nosnippet>1097</a> <span class="kw-2">&</span>data.store, |
| <a href=#1098 id=1098 data-nosnippet>1098</a> InferenceTyDiagnosticSource::Signature, |
| <a href=#1099 id=1099 data-nosnippet>1099</a> LifetimeElisionKind::Elided(<span class="self">self</span>.types.regions.statik), |
| <a href=#1100 id=1100 data-nosnippet>1100</a> ); |
| <a href=#1101 id=1101 data-nosnippet>1101</a> |
| <a href=#1102 id=1102 data-nosnippet>1102</a> <span class="self">self</span>.return_ty = return_ty; |
| <a href=#1103 id=1103 data-nosnippet>1103</a> } |
| <a href=#1104 id=1104 data-nosnippet>1104</a> |
| <a href=#1105 id=1105 data-nosnippet>1105</a> <span class="kw">fn </span>collect_fn(<span class="kw-2">&mut </span><span class="self">self</span>, func: FunctionId) { |
| <a href=#1106 id=1106 data-nosnippet>1106</a> <span class="kw">let </span>data = <span class="self">self</span>.db.function_signature(func); |
| <a href=#1107 id=1107 data-nosnippet>1107</a> <span class="kw">let </span><span class="kw-2">mut </span>param_tys = <span class="self">self</span>.with_ty_lowering( |
| <a href=#1108 id=1108 data-nosnippet>1108</a> <span class="kw-2">&</span>data.store, |
| <a href=#1109 id=1109 data-nosnippet>1109</a> InferenceTyDiagnosticSource::Signature, |
| <a href=#1110 id=1110 data-nosnippet>1110</a> LifetimeElisionKind::for_fn_params(<span class="kw-2">&</span>data), |
| <a href=#1111 id=1111 data-nosnippet>1111</a> |ctx| data.params.iter().map(|<span class="kw-2">&</span>type_ref| ctx.lower_ty(type_ref)).collect::<Vec<<span class="kw">_</span>>>(), |
| <a href=#1112 id=1112 data-nosnippet>1112</a> ); |
| <a href=#1113 id=1113 data-nosnippet>1113</a> |
| <a href=#1114 id=1114 data-nosnippet>1114</a> <span class="comment">// Check if function contains a va_list, if it does then we append it to the parameter types |
| <a href=#1115 id=1115 data-nosnippet>1115</a> // that are collected from the function data |
| <a href=#1116 id=1116 data-nosnippet>1116</a> </span><span class="kw">if </span>data.is_varargs() { |
| <a href=#1117 id=1117 data-nosnippet>1117</a> <span class="kw">let </span>va_list_ty = <span class="kw">match </span><span class="self">self</span>.resolve_va_list() { |
| <a href=#1118 id=1118 data-nosnippet>1118</a> <span class="prelude-val">Some</span>(va_list) => Ty::new_adt( |
| <a href=#1119 id=1119 data-nosnippet>1119</a> <span class="self">self</span>.interner(), |
| <a href=#1120 id=1120 data-nosnippet>1120</a> va_list, |
| <a href=#1121 id=1121 data-nosnippet>1121</a> GenericArgs::for_item_with_defaults( |
| <a href=#1122 id=1122 data-nosnippet>1122</a> <span class="self">self</span>.interner(), |
| <a href=#1123 id=1123 data-nosnippet>1123</a> va_list.into(), |
| <a href=#1124 id=1124 data-nosnippet>1124</a> |<span class="kw">_</span>, id, <span class="kw">_</span>| <span class="self">self</span>.table.next_var_for_param(id), |
| <a href=#1125 id=1125 data-nosnippet>1125</a> ), |
| <a href=#1126 id=1126 data-nosnippet>1126</a> ), |
| <a href=#1127 id=1127 data-nosnippet>1127</a> <span class="prelude-val">None </span>=> <span class="self">self</span>.err_ty(), |
| <a href=#1128 id=1128 data-nosnippet>1128</a> }; |
| <a href=#1129 id=1129 data-nosnippet>1129</a> |
| <a href=#1130 id=1130 data-nosnippet>1130</a> param_tys.push(va_list_ty); |
| <a href=#1131 id=1131 data-nosnippet>1131</a> } |
| <a href=#1132 id=1132 data-nosnippet>1132</a> <span class="kw">let </span><span class="kw-2">mut </span>param_tys = param_tys.into_iter().chain(iter::repeat(<span class="self">self</span>.table.next_ty_var())); |
| <a href=#1133 id=1133 data-nosnippet>1133</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(self_param) = <span class="self">self</span>.body.self_param |
| <a href=#1134 id=1134 data-nosnippet>1134</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(ty) = param_tys.next() |
| <a href=#1135 id=1135 data-nosnippet>1135</a> { |
| <a href=#1136 id=1136 data-nosnippet>1136</a> <span class="kw">let </span>ty = <span class="self">self</span>.process_user_written_ty(ty); |
| <a href=#1137 id=1137 data-nosnippet>1137</a> <span class="self">self</span>.write_binding_ty(self_param, ty); |
| <a href=#1138 id=1138 data-nosnippet>1138</a> } |
| <a href=#1139 id=1139 data-nosnippet>1139</a> <span class="kw">for </span>(ty, pat) <span class="kw">in </span>param_tys.zip(<span class="kw-2">&*</span><span class="self">self</span>.body.params) { |
| <a href=#1140 id=1140 data-nosnippet>1140</a> <span class="kw">let </span>ty = <span class="self">self</span>.process_user_written_ty(ty); |
| <a href=#1141 id=1141 data-nosnippet>1141</a> |
| <a href=#1142 id=1142 data-nosnippet>1142</a> <span class="self">self</span>.infer_top_pat(<span class="kw-2">*</span>pat, ty, <span class="prelude-val">None</span>); |
| <a href=#1143 id=1143 data-nosnippet>1143</a> } |
| <a href=#1144 id=1144 data-nosnippet>1144</a> <span class="self">self</span>.return_ty = <span class="kw">match </span>data.ret_type { |
| <a href=#1145 id=1145 data-nosnippet>1145</a> <span class="prelude-val">Some</span>(return_ty) => { |
| <a href=#1146 id=1146 data-nosnippet>1146</a> <span class="kw">let </span>return_ty = <span class="self">self</span>.with_ty_lowering( |
| <a href=#1147 id=1147 data-nosnippet>1147</a> <span class="kw-2">&</span>data.store, |
| <a href=#1148 id=1148 data-nosnippet>1148</a> InferenceTyDiagnosticSource::Signature, |
| <a href=#1149 id=1149 data-nosnippet>1149</a> LifetimeElisionKind::for_fn_ret(<span class="self">self</span>.interner()), |
| <a href=#1150 id=1150 data-nosnippet>1150</a> |ctx| { |
| <a href=#1151 id=1151 data-nosnippet>1151</a> ctx.impl_trait_mode(ImplTraitLoweringMode::Opaque); |
| <a href=#1152 id=1152 data-nosnippet>1152</a> ctx.lower_ty(return_ty) |
| <a href=#1153 id=1153 data-nosnippet>1153</a> }, |
| <a href=#1154 id=1154 data-nosnippet>1154</a> ); |
| <a href=#1155 id=1155 data-nosnippet>1155</a> <span class="self">self</span>.process_user_written_ty(return_ty) |
| <a href=#1156 id=1156 data-nosnippet>1156</a> } |
| <a href=#1157 id=1157 data-nosnippet>1157</a> <span class="prelude-val">None </span>=> <span class="self">self</span>.types.types.unit, |
| <a href=#1158 id=1158 data-nosnippet>1158</a> }; |
| <a href=#1159 id=1159 data-nosnippet>1159</a> |
| <a href=#1160 id=1160 data-nosnippet>1160</a> <span class="self">self</span>.return_coercion = <span class="prelude-val">Some</span>(CoerceMany::new(<span class="self">self</span>.return_ty)); |
| <a href=#1161 id=1161 data-nosnippet>1161</a> } |
| <a href=#1162 id=1162 data-nosnippet>1162</a> |
| <a href=#1163 id=1163 data-nosnippet>1163</a> <span class="attr">#[inline] |
| <a href=#1164 id=1164 data-nosnippet>1164</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>interner(<span class="kw-2">&</span><span class="self">self</span>) -> DbInterner<<span class="lifetime">'db</span>> { |
| <a href=#1165 id=1165 data-nosnippet>1165</a> <span class="self">self</span>.table.interner() |
| <a href=#1166 id=1166 data-nosnippet>1166</a> } |
| <a href=#1167 id=1167 data-nosnippet>1167</a> |
| <a href=#1168 id=1168 data-nosnippet>1168</a> <span class="attr">#[inline] |
| <a href=#1169 id=1169 data-nosnippet>1169</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>infcx(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>InferCtxt<<span class="lifetime">'db</span>> { |
| <a href=#1170 id=1170 data-nosnippet>1170</a> <span class="kw-2">&</span><span class="self">self</span>.table.infer_ctxt |
| <a href=#1171 id=1171 data-nosnippet>1171</a> } |
| <a href=#1172 id=1172 data-nosnippet>1172</a> |
| <a href=#1173 id=1173 data-nosnippet>1173</a> <span class="kw">fn </span>infer_body(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#1174 id=1174 data-nosnippet>1174</a> <span class="kw">match </span><span class="self">self</span>.return_coercion { |
| <a href=#1175 id=1175 data-nosnippet>1175</a> <span class="prelude-val">Some</span>(<span class="kw">_</span>) => <span class="self">self</span>.infer_return(<span class="self">self</span>.body.body_expr), |
| <a href=#1176 id=1176 data-nosnippet>1176</a> <span class="prelude-val">None </span>=> { |
| <a href=#1177 id=1177 data-nosnippet>1177</a> <span class="kw">_ </span>= <span class="self">self</span>.infer_expr_coerce( |
| <a href=#1178 id=1178 data-nosnippet>1178</a> <span class="self">self</span>.body.body_expr, |
| <a href=#1179 id=1179 data-nosnippet>1179</a> <span class="kw-2">&</span>Expectation::has_type(<span class="self">self</span>.return_ty), |
| <a href=#1180 id=1180 data-nosnippet>1180</a> ExprIsRead::Yes, |
| <a href=#1181 id=1181 data-nosnippet>1181</a> ) |
| <a href=#1182 id=1182 data-nosnippet>1182</a> } |
| <a href=#1183 id=1183 data-nosnippet>1183</a> } |
| <a href=#1184 id=1184 data-nosnippet>1184</a> } |
| <a href=#1185 id=1185 data-nosnippet>1185</a> |
| <a href=#1186 id=1186 data-nosnippet>1186</a> <span class="kw">fn </span>write_expr_ty(<span class="kw-2">&mut </span><span class="self">self</span>, expr: ExprId, ty: Ty<<span class="lifetime">'db</span>>) { |
| <a href=#1187 id=1187 data-nosnippet>1187</a> <span class="self">self</span>.result.type_of_expr.insert(expr, ty.store()); |
| <a href=#1188 id=1188 data-nosnippet>1188</a> } |
| <a href=#1189 id=1189 data-nosnippet>1189</a> |
| <a href=#1190 id=1190 data-nosnippet>1190</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>write_expr_adj(<span class="kw-2">&mut </span><span class="self">self</span>, expr: ExprId, adjustments: Box<[Adjustment]>) { |
| <a href=#1191 id=1191 data-nosnippet>1191</a> <span class="kw">if </span>adjustments.is_empty() { |
| <a href=#1192 id=1192 data-nosnippet>1192</a> <span class="kw">return</span>; |
| <a href=#1193 id=1193 data-nosnippet>1193</a> } |
| <a href=#1194 id=1194 data-nosnippet>1194</a> <span class="kw">match </span><span class="self">self</span>.result.expr_adjustments.entry(expr) { |
| <a href=#1195 id=1195 data-nosnippet>1195</a> std::collections::hash_map::Entry::Occupied(<span class="kw-2">mut </span>entry) => { |
| <a href=#1196 id=1196 data-nosnippet>1196</a> <span class="kw">match </span>(<span class="kw-2">&mut </span>entry.get_mut()[..], <span class="kw-2">&</span>adjustments[..]) { |
| <a href=#1197 id=1197 data-nosnippet>1197</a> ( |
| <a href=#1198 id=1198 data-nosnippet>1198</a> [Adjustment { kind: Adjust::NeverToAny, target }], |
| <a href=#1199 id=1199 data-nosnippet>1199</a> [.., Adjustment { target: new_target, .. }], |
| <a href=#1200 id=1200 data-nosnippet>1200</a> ) => { |
| <a href=#1201 id=1201 data-nosnippet>1201</a> <span class="comment">// NeverToAny coercion can target any type, so instead of adding a new |
| <a href=#1202 id=1202 data-nosnippet>1202</a> // adjustment on top we can change the target. |
| <a href=#1203 id=1203 data-nosnippet>1203</a> </span><span class="kw-2">*</span>target = new_target.clone(); |
| <a href=#1204 id=1204 data-nosnippet>1204</a> } |
| <a href=#1205 id=1205 data-nosnippet>1205</a> <span class="kw">_ </span>=> { |
| <a href=#1206 id=1206 data-nosnippet>1206</a> <span class="kw-2">*</span>entry.get_mut() = adjustments; |
| <a href=#1207 id=1207 data-nosnippet>1207</a> } |
| <a href=#1208 id=1208 data-nosnippet>1208</a> } |
| <a href=#1209 id=1209 data-nosnippet>1209</a> } |
| <a href=#1210 id=1210 data-nosnippet>1210</a> std::collections::hash_map::Entry::Vacant(entry) => { |
| <a href=#1211 id=1211 data-nosnippet>1211</a> entry.insert(adjustments); |
| <a href=#1212 id=1212 data-nosnippet>1212</a> } |
| <a href=#1213 id=1213 data-nosnippet>1213</a> } |
| <a href=#1214 id=1214 data-nosnippet>1214</a> } |
| <a href=#1215 id=1215 data-nosnippet>1215</a> |
| <a href=#1216 id=1216 data-nosnippet>1216</a> <span class="kw">fn </span>write_pat_adj(<span class="kw-2">&mut </span><span class="self">self</span>, pat: PatId, adjustments: Box<[StoredTy]>) { |
| <a href=#1217 id=1217 data-nosnippet>1217</a> <span class="kw">if </span>adjustments.is_empty() { |
| <a href=#1218 id=1218 data-nosnippet>1218</a> <span class="kw">return</span>; |
| <a href=#1219 id=1219 data-nosnippet>1219</a> } |
| <a href=#1220 id=1220 data-nosnippet>1220</a> <span class="self">self</span>.result.pat_adjustments.entry(pat).or_default().extend(adjustments); |
| <a href=#1221 id=1221 data-nosnippet>1221</a> } |
| <a href=#1222 id=1222 data-nosnippet>1222</a> |
| <a href=#1223 id=1223 data-nosnippet>1223</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>write_method_resolution( |
| <a href=#1224 id=1224 data-nosnippet>1224</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1225 id=1225 data-nosnippet>1225</a> expr: ExprId, |
| <a href=#1226 id=1226 data-nosnippet>1226</a> func: FunctionId, |
| <a href=#1227 id=1227 data-nosnippet>1227</a> subst: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#1228 id=1228 data-nosnippet>1228</a> ) { |
| <a href=#1229 id=1229 data-nosnippet>1229</a> <span class="self">self</span>.result.method_resolutions.insert(expr, (func, subst.store())); |
| <a href=#1230 id=1230 data-nosnippet>1230</a> } |
| <a href=#1231 id=1231 data-nosnippet>1231</a> |
| <a href=#1232 id=1232 data-nosnippet>1232</a> <span class="kw">fn </span>write_variant_resolution(<span class="kw-2">&mut </span><span class="self">self</span>, id: ExprOrPatId, variant: VariantId) { |
| <a href=#1233 id=1233 data-nosnippet>1233</a> <span class="self">self</span>.result.variant_resolutions.insert(id, variant); |
| <a href=#1234 id=1234 data-nosnippet>1234</a> } |
| <a href=#1235 id=1235 data-nosnippet>1235</a> |
| <a href=#1236 id=1236 data-nosnippet>1236</a> <span class="kw">fn </span>write_assoc_resolution( |
| <a href=#1237 id=1237 data-nosnippet>1237</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1238 id=1238 data-nosnippet>1238</a> id: ExprOrPatId, |
| <a href=#1239 id=1239 data-nosnippet>1239</a> item: CandidateId, |
| <a href=#1240 id=1240 data-nosnippet>1240</a> subs: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#1241 id=1241 data-nosnippet>1241</a> ) { |
| <a href=#1242 id=1242 data-nosnippet>1242</a> <span class="self">self</span>.result.assoc_resolutions.insert(id, (item, subs.store())); |
| <a href=#1243 id=1243 data-nosnippet>1243</a> } |
| <a href=#1244 id=1244 data-nosnippet>1244</a> |
| <a href=#1245 id=1245 data-nosnippet>1245</a> <span class="kw">fn </span>write_pat_ty(<span class="kw-2">&mut </span><span class="self">self</span>, pat: PatId, ty: Ty<<span class="lifetime">'db</span>>) { |
| <a href=#1246 id=1246 data-nosnippet>1246</a> <span class="self">self</span>.result.type_of_pat.insert(pat, ty.store()); |
| <a href=#1247 id=1247 data-nosnippet>1247</a> } |
| <a href=#1248 id=1248 data-nosnippet>1248</a> |
| <a href=#1249 id=1249 data-nosnippet>1249</a> <span class="kw">fn </span>write_type_placeholder_ty(<span class="kw-2">&mut </span><span class="self">self</span>, type_ref: TypeRefId, ty: Ty<<span class="lifetime">'db</span>>) { |
| <a href=#1250 id=1250 data-nosnippet>1250</a> <span class="self">self</span>.result.type_of_type_placeholder.insert(type_ref, ty.store()); |
| <a href=#1251 id=1251 data-nosnippet>1251</a> } |
| <a href=#1252 id=1252 data-nosnippet>1252</a> |
| <a href=#1253 id=1253 data-nosnippet>1253</a> <span class="kw">fn </span>write_binding_ty(<span class="kw-2">&mut </span><span class="self">self</span>, id: BindingId, ty: Ty<<span class="lifetime">'db</span>>) { |
| <a href=#1254 id=1254 data-nosnippet>1254</a> <span class="self">self</span>.result.type_of_binding.insert(id, ty.store()); |
| <a href=#1255 id=1255 data-nosnippet>1255</a> } |
| <a href=#1256 id=1256 data-nosnippet>1256</a> |
| <a href=#1257 id=1257 data-nosnippet>1257</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>push_diagnostic(<span class="kw-2">&</span><span class="self">self</span>, diagnostic: InferenceDiagnostic) { |
| <a href=#1258 id=1258 data-nosnippet>1258</a> <span class="self">self</span>.diagnostics.push(diagnostic); |
| <a href=#1259 id=1259 data-nosnippet>1259</a> } |
| <a href=#1260 id=1260 data-nosnippet>1260</a> |
| <a href=#1261 id=1261 data-nosnippet>1261</a> <span class="kw">fn </span>with_ty_lowering<R>( |
| <a href=#1262 id=1262 data-nosnippet>1262</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1263 id=1263 data-nosnippet>1263</a> store: <span class="kw-2">&</span>ExpressionStore, |
| <a href=#1264 id=1264 data-nosnippet>1264</a> types_source: InferenceTyDiagnosticSource, |
| <a href=#1265 id=1265 data-nosnippet>1265</a> lifetime_elision: LifetimeElisionKind<<span class="lifetime">'db</span>>, |
| <a href=#1266 id=1266 data-nosnippet>1266</a> f: <span class="kw">impl </span>FnOnce(<span class="kw-2">&mut </span>TyLoweringContext<<span class="lifetime">'db</span>, <span class="lifetime">'_</span>>) -> R, |
| <a href=#1267 id=1267 data-nosnippet>1267</a> ) -> R { |
| <a href=#1268 id=1268 data-nosnippet>1268</a> <span class="kw">let </span><span class="kw-2">mut </span>ctx = TyLoweringContext::new( |
| <a href=#1269 id=1269 data-nosnippet>1269</a> <span class="self">self</span>.db, |
| <a href=#1270 id=1270 data-nosnippet>1270</a> <span class="kw-2">&</span><span class="self">self</span>.resolver, |
| <a href=#1271 id=1271 data-nosnippet>1271</a> store, |
| <a href=#1272 id=1272 data-nosnippet>1272</a> <span class="kw-2">&</span><span class="self">self</span>.diagnostics, |
| <a href=#1273 id=1273 data-nosnippet>1273</a> types_source, |
| <a href=#1274 id=1274 data-nosnippet>1274</a> <span class="self">self</span>.generic_def, |
| <a href=#1275 id=1275 data-nosnippet>1275</a> lifetime_elision, |
| <a href=#1276 id=1276 data-nosnippet>1276</a> ); |
| <a href=#1277 id=1277 data-nosnippet>1277</a> f(<span class="kw-2">&mut </span>ctx) |
| <a href=#1278 id=1278 data-nosnippet>1278</a> } |
| <a href=#1279 id=1279 data-nosnippet>1279</a> |
| <a href=#1280 id=1280 data-nosnippet>1280</a> <span class="kw">fn </span>with_body_ty_lowering<R>( |
| <a href=#1281 id=1281 data-nosnippet>1281</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1282 id=1282 data-nosnippet>1282</a> f: <span class="kw">impl </span>FnOnce(<span class="kw-2">&mut </span>TyLoweringContext<<span class="lifetime">'db</span>, <span class="lifetime">'_</span>>) -> R, |
| <a href=#1283 id=1283 data-nosnippet>1283</a> ) -> R { |
| <a href=#1284 id=1284 data-nosnippet>1284</a> <span class="self">self</span>.with_ty_lowering( |
| <a href=#1285 id=1285 data-nosnippet>1285</a> <span class="self">self</span>.body, |
| <a href=#1286 id=1286 data-nosnippet>1286</a> InferenceTyDiagnosticSource::Body, |
| <a href=#1287 id=1287 data-nosnippet>1287</a> LifetimeElisionKind::Infer, |
| <a href=#1288 id=1288 data-nosnippet>1288</a> f, |
| <a href=#1289 id=1289 data-nosnippet>1289</a> ) |
| <a href=#1290 id=1290 data-nosnippet>1290</a> } |
| <a href=#1291 id=1291 data-nosnippet>1291</a> |
| <a href=#1292 id=1292 data-nosnippet>1292</a> <span class="kw">fn </span>make_ty( |
| <a href=#1293 id=1293 data-nosnippet>1293</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1294 id=1294 data-nosnippet>1294</a> type_ref: TypeRefId, |
| <a href=#1295 id=1295 data-nosnippet>1295</a> store: <span class="kw-2">&</span>ExpressionStore, |
| <a href=#1296 id=1296 data-nosnippet>1296</a> type_source: InferenceTyDiagnosticSource, |
| <a href=#1297 id=1297 data-nosnippet>1297</a> lifetime_elision: LifetimeElisionKind<<span class="lifetime">'db</span>>, |
| <a href=#1298 id=1298 data-nosnippet>1298</a> ) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1299 id=1299 data-nosnippet>1299</a> <span class="kw">let </span>ty = <span class="self">self |
| <a href=#1300 id=1300 data-nosnippet>1300</a> </span>.with_ty_lowering(store, type_source, lifetime_elision, |ctx| ctx.lower_ty(type_ref)); |
| <a href=#1301 id=1301 data-nosnippet>1301</a> <span class="kw">let </span>ty = <span class="self">self</span>.process_user_written_ty(ty); |
| <a href=#1302 id=1302 data-nosnippet>1302</a> |
| <a href=#1303 id=1303 data-nosnippet>1303</a> <span class="comment">// Record the association from placeholders' TypeRefId to type variables. |
| <a href=#1304 id=1304 data-nosnippet>1304</a> // We only record them if their number matches. This assumes TypeRef::walk and TypeVisitable process the items in the same order. |
| <a href=#1305 id=1305 data-nosnippet>1305</a> </span><span class="kw">let </span>type_variables = collect_type_inference_vars(<span class="kw-2">&</span>ty); |
| <a href=#1306 id=1306 data-nosnippet>1306</a> <span class="kw">let </span><span class="kw-2">mut </span>placeholder_ids = <span class="macro">vec!</span>[]; |
| <a href=#1307 id=1307 data-nosnippet>1307</a> TypeRef::walk(type_ref, store, <span class="kw-2">&mut </span>|type_ref_id, type_ref| { |
| <a href=#1308 id=1308 data-nosnippet>1308</a> <span class="kw">if </span><span class="macro">matches!</span>(type_ref, TypeRef::Placeholder) { |
| <a href=#1309 id=1309 data-nosnippet>1309</a> placeholder_ids.push(type_ref_id); |
| <a href=#1310 id=1310 data-nosnippet>1310</a> } |
| <a href=#1311 id=1311 data-nosnippet>1311</a> }); |
| <a href=#1312 id=1312 data-nosnippet>1312</a> |
| <a href=#1313 id=1313 data-nosnippet>1313</a> <span class="kw">if </span>placeholder_ids.len() == type_variables.len() { |
| <a href=#1314 id=1314 data-nosnippet>1314</a> <span class="kw">for </span>(placeholder_id, type_variable) <span class="kw">in |
| <a href=#1315 id=1315 data-nosnippet>1315</a> </span>placeholder_ids.into_iter().zip(type_variables.into_iter()) |
| <a href=#1316 id=1316 data-nosnippet>1316</a> { |
| <a href=#1317 id=1317 data-nosnippet>1317</a> <span class="self">self</span>.write_type_placeholder_ty(placeholder_id, type_variable); |
| <a href=#1318 id=1318 data-nosnippet>1318</a> } |
| <a href=#1319 id=1319 data-nosnippet>1319</a> } |
| <a href=#1320 id=1320 data-nosnippet>1320</a> |
| <a href=#1321 id=1321 data-nosnippet>1321</a> ty |
| <a href=#1322 id=1322 data-nosnippet>1322</a> } |
| <a href=#1323 id=1323 data-nosnippet>1323</a> |
| <a href=#1324 id=1324 data-nosnippet>1324</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>make_body_ty(<span class="kw-2">&mut </span><span class="self">self</span>, type_ref: TypeRefId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1325 id=1325 data-nosnippet>1325</a> <span class="self">self</span>.make_ty( |
| <a href=#1326 id=1326 data-nosnippet>1326</a> type_ref, |
| <a href=#1327 id=1327 data-nosnippet>1327</a> <span class="self">self</span>.body, |
| <a href=#1328 id=1328 data-nosnippet>1328</a> InferenceTyDiagnosticSource::Body, |
| <a href=#1329 id=1329 data-nosnippet>1329</a> LifetimeElisionKind::Infer, |
| <a href=#1330 id=1330 data-nosnippet>1330</a> ) |
| <a href=#1331 id=1331 data-nosnippet>1331</a> } |
| <a href=#1332 id=1332 data-nosnippet>1332</a> |
| <a href=#1333 id=1333 data-nosnippet>1333</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>make_body_const(<span class="kw-2">&mut </span><span class="self">self</span>, const_ref: ConstRef, ty: Ty<<span class="lifetime">'db</span>>) -> Const<<span class="lifetime">'db</span>> { |
| <a href=#1334 id=1334 data-nosnippet>1334</a> <span class="kw">let </span>const_ = <span class="self">self</span>.with_ty_lowering( |
| <a href=#1335 id=1335 data-nosnippet>1335</a> <span class="self">self</span>.body, |
| <a href=#1336 id=1336 data-nosnippet>1336</a> InferenceTyDiagnosticSource::Body, |
| <a href=#1337 id=1337 data-nosnippet>1337</a> LifetimeElisionKind::Infer, |
| <a href=#1338 id=1338 data-nosnippet>1338</a> |ctx| ctx.lower_const(const_ref, ty), |
| <a href=#1339 id=1339 data-nosnippet>1339</a> ); |
| <a href=#1340 id=1340 data-nosnippet>1340</a> <span class="self">self</span>.insert_type_vars(const_) |
| <a href=#1341 id=1341 data-nosnippet>1341</a> } |
| <a href=#1342 id=1342 data-nosnippet>1342</a> |
| <a href=#1343 id=1343 data-nosnippet>1343</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>make_path_as_body_const(<span class="kw-2">&mut </span><span class="self">self</span>, path: <span class="kw-2">&</span>Path, ty: Ty<<span class="lifetime">'db</span>>) -> Const<<span class="lifetime">'db</span>> { |
| <a href=#1344 id=1344 data-nosnippet>1344</a> <span class="kw">let </span>const_ = <span class="self">self</span>.with_ty_lowering( |
| <a href=#1345 id=1345 data-nosnippet>1345</a> <span class="self">self</span>.body, |
| <a href=#1346 id=1346 data-nosnippet>1346</a> InferenceTyDiagnosticSource::Body, |
| <a href=#1347 id=1347 data-nosnippet>1347</a> LifetimeElisionKind::Infer, |
| <a href=#1348 id=1348 data-nosnippet>1348</a> |ctx| ctx.lower_path_as_const(path, ty), |
| <a href=#1349 id=1349 data-nosnippet>1349</a> ); |
| <a href=#1350 id=1350 data-nosnippet>1350</a> <span class="self">self</span>.insert_type_vars(const_) |
| <a href=#1351 id=1351 data-nosnippet>1351</a> } |
| <a href=#1352 id=1352 data-nosnippet>1352</a> |
| <a href=#1353 id=1353 data-nosnippet>1353</a> <span class="kw">fn </span>err_ty(<span class="kw-2">&</span><span class="self">self</span>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1354 id=1354 data-nosnippet>1354</a> <span class="self">self</span>.types.types.error |
| <a href=#1355 id=1355 data-nosnippet>1355</a> } |
| <a href=#1356 id=1356 data-nosnippet>1356</a> |
| <a href=#1357 id=1357 data-nosnippet>1357</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>make_body_lifetime(<span class="kw-2">&mut </span><span class="self">self</span>, lifetime_ref: LifetimeRefId) -> Region<<span class="lifetime">'db</span>> { |
| <a href=#1358 id=1358 data-nosnippet>1358</a> <span class="kw">let </span>lt = <span class="self">self</span>.with_ty_lowering( |
| <a href=#1359 id=1359 data-nosnippet>1359</a> <span class="self">self</span>.body, |
| <a href=#1360 id=1360 data-nosnippet>1360</a> InferenceTyDiagnosticSource::Body, |
| <a href=#1361 id=1361 data-nosnippet>1361</a> LifetimeElisionKind::Infer, |
| <a href=#1362 id=1362 data-nosnippet>1362</a> |ctx| ctx.lower_lifetime(lifetime_ref), |
| <a href=#1363 id=1363 data-nosnippet>1363</a> ); |
| <a href=#1364 id=1364 data-nosnippet>1364</a> <span class="self">self</span>.insert_type_vars(lt) |
| <a href=#1365 id=1365 data-nosnippet>1365</a> } |
| <a href=#1366 id=1366 data-nosnippet>1366</a> |
| <a href=#1367 id=1367 data-nosnippet>1367</a> <span class="doccomment">/// Replaces `Ty::Error` by a new type var, so we can maybe still infer it. |
| <a href=#1368 id=1368 data-nosnippet>1368</a> </span><span class="kw">fn </span>insert_type_vars_shallow(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1369 id=1369 data-nosnippet>1369</a> <span class="self">self</span>.table.insert_type_vars_shallow(ty) |
| <a href=#1370 id=1370 data-nosnippet>1370</a> } |
| <a href=#1371 id=1371 data-nosnippet>1371</a> |
| <a href=#1372 id=1372 data-nosnippet>1372</a> <span class="kw">fn </span>insert_type_vars<T>(<span class="kw-2">&mut </span><span class="self">self</span>, ty: T) -> T |
| <a href=#1373 id=1373 data-nosnippet>1373</a> <span class="kw">where |
| <a href=#1374 id=1374 data-nosnippet>1374</a> </span>T: TypeFoldable<DbInterner<<span class="lifetime">'db</span>>>, |
| <a href=#1375 id=1375 data-nosnippet>1375</a> { |
| <a href=#1376 id=1376 data-nosnippet>1376</a> <span class="self">self</span>.table.insert_type_vars(ty) |
| <a href=#1377 id=1377 data-nosnippet>1377</a> } |
| <a href=#1378 id=1378 data-nosnippet>1378</a> |
| <a href=#1379 id=1379 data-nosnippet>1379</a> <span class="kw">fn </span>unify(<span class="kw-2">&mut </span><span class="self">self</span>, ty1: Ty<<span class="lifetime">'db</span>>, ty2: Ty<<span class="lifetime">'db</span>>) -> bool { |
| <a href=#1380 id=1380 data-nosnippet>1380</a> <span class="self">self</span>.table.unify(ty1, ty2) |
| <a href=#1381 id=1381 data-nosnippet>1381</a> } |
| <a href=#1382 id=1382 data-nosnippet>1382</a> |
| <a href=#1383 id=1383 data-nosnippet>1383</a> <span class="doccomment">/// Attempts to returns the deeply last field of nested structures, but |
| <a href=#1384 id=1384 data-nosnippet>1384</a> /// does not apply any normalization in its search. Returns the same type |
| <a href=#1385 id=1385 data-nosnippet>1385</a> /// if input `ty` is not a structure at all. |
| <a href=#1386 id=1386 data-nosnippet>1386</a> </span><span class="kw">fn </span>struct_tail_without_normalization(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1387 id=1387 data-nosnippet>1387</a> <span class="self">self</span>.struct_tail_with_normalize(ty, identity) |
| <a href=#1388 id=1388 data-nosnippet>1388</a> } |
| <a href=#1389 id=1389 data-nosnippet>1389</a> |
| <a href=#1390 id=1390 data-nosnippet>1390</a> <span class="doccomment">/// Returns the deeply last field of nested structures, or the same type if |
| <a href=#1391 id=1391 data-nosnippet>1391</a> /// not a structure at all. Corresponds to the only possible unsized field, |
| <a href=#1392 id=1392 data-nosnippet>1392</a> /// and its type can be used to determine unsizing strategy. |
| <a href=#1393 id=1393 data-nosnippet>1393</a> /// |
| <a href=#1394 id=1394 data-nosnippet>1394</a> /// This is parameterized over the normalization strategy (i.e. how to |
| <a href=#1395 id=1395 data-nosnippet>1395</a> /// handle `<T as Trait>::Assoc` and `impl Trait`); pass the identity |
| <a href=#1396 id=1396 data-nosnippet>1396</a> /// function to indicate no normalization should take place. |
| <a href=#1397 id=1397 data-nosnippet>1397</a> </span><span class="kw">fn </span>struct_tail_with_normalize( |
| <a href=#1398 id=1398 data-nosnippet>1398</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1399 id=1399 data-nosnippet>1399</a> <span class="kw-2">mut </span>ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1400 id=1400 data-nosnippet>1400</a> <span class="kw-2">mut </span>normalize: <span class="kw">impl </span>FnMut(Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>>, |
| <a href=#1401 id=1401 data-nosnippet>1401</a> ) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1402 id=1402 data-nosnippet>1402</a> <span class="comment">// FIXME: fetch the limit properly |
| <a href=#1403 id=1403 data-nosnippet>1403</a> </span><span class="kw">let </span>recursion_limit = <span class="number">10</span>; |
| <a href=#1404 id=1404 data-nosnippet>1404</a> <span class="kw">for </span>iteration <span class="kw">in </span><span class="number">0</span>.. { |
| <a href=#1405 id=1405 data-nosnippet>1405</a> <span class="kw">if </span>iteration > recursion_limit { |
| <a href=#1406 id=1406 data-nosnippet>1406</a> <span class="kw">return </span><span class="self">self</span>.err_ty(); |
| <a href=#1407 id=1407 data-nosnippet>1407</a> } |
| <a href=#1408 id=1408 data-nosnippet>1408</a> <span class="kw">match </span>ty.kind() { |
| <a href=#1409 id=1409 data-nosnippet>1409</a> TyKind::Adt(adt_def, substs) => <span class="kw">match </span>adt_def.def_id().<span class="number">0 </span>{ |
| <a href=#1410 id=1410 data-nosnippet>1410</a> AdtId::StructId(struct_id) => { |
| <a href=#1411 id=1411 data-nosnippet>1411</a> <span class="kw">match </span><span class="self">self |
| <a href=#1412 id=1412 data-nosnippet>1412</a> </span>.db |
| <a href=#1413 id=1413 data-nosnippet>1413</a> .field_types(struct_id.into()) |
| <a href=#1414 id=1414 data-nosnippet>1414</a> .values() |
| <a href=#1415 id=1415 data-nosnippet>1415</a> .next_back() |
| <a href=#1416 id=1416 data-nosnippet>1416</a> .map(|it| it.get()) |
| <a href=#1417 id=1417 data-nosnippet>1417</a> { |
| <a href=#1418 id=1418 data-nosnippet>1418</a> <span class="prelude-val">Some</span>(field) => { |
| <a href=#1419 id=1419 data-nosnippet>1419</a> ty = field.instantiate(<span class="self">self</span>.interner(), substs); |
| <a href=#1420 id=1420 data-nosnippet>1420</a> } |
| <a href=#1421 id=1421 data-nosnippet>1421</a> <span class="prelude-val">None </span>=> <span class="kw">break</span>, |
| <a href=#1422 id=1422 data-nosnippet>1422</a> } |
| <a href=#1423 id=1423 data-nosnippet>1423</a> } |
| <a href=#1424 id=1424 data-nosnippet>1424</a> <span class="kw">_ </span>=> <span class="kw">break</span>, |
| <a href=#1425 id=1425 data-nosnippet>1425</a> }, |
| <a href=#1426 id=1426 data-nosnippet>1426</a> TyKind::Tuple(substs) => <span class="kw">match </span>substs.as_slice().split_last() { |
| <a href=#1427 id=1427 data-nosnippet>1427</a> <span class="prelude-val">Some</span>((last_ty, <span class="kw">_</span>)) => ty = <span class="kw-2">*</span>last_ty, |
| <a href=#1428 id=1428 data-nosnippet>1428</a> <span class="prelude-val">None </span>=> <span class="kw">break</span>, |
| <a href=#1429 id=1429 data-nosnippet>1429</a> }, |
| <a href=#1430 id=1430 data-nosnippet>1430</a> TyKind::Alias(..) => { |
| <a href=#1431 id=1431 data-nosnippet>1431</a> <span class="kw">let </span>normalized = normalize(ty); |
| <a href=#1432 id=1432 data-nosnippet>1432</a> <span class="kw">if </span>ty == normalized { |
| <a href=#1433 id=1433 data-nosnippet>1433</a> <span class="kw">return </span>ty; |
| <a href=#1434 id=1434 data-nosnippet>1434</a> } <span class="kw">else </span>{ |
| <a href=#1435 id=1435 data-nosnippet>1435</a> ty = normalized; |
| <a href=#1436 id=1436 data-nosnippet>1436</a> } |
| <a href=#1437 id=1437 data-nosnippet>1437</a> } |
| <a href=#1438 id=1438 data-nosnippet>1438</a> <span class="kw">_ </span>=> <span class="kw">break</span>, |
| <a href=#1439 id=1439 data-nosnippet>1439</a> } |
| <a href=#1440 id=1440 data-nosnippet>1440</a> } |
| <a href=#1441 id=1441 data-nosnippet>1441</a> ty |
| <a href=#1442 id=1442 data-nosnippet>1442</a> } |
| <a href=#1443 id=1443 data-nosnippet>1443</a> |
| <a href=#1444 id=1444 data-nosnippet>1444</a> <span class="doccomment">/// Whenever you lower a user-written type, you should call this. |
| <a href=#1445 id=1445 data-nosnippet>1445</a> </span><span class="kw">fn </span>process_user_written_ty(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1446 id=1446 data-nosnippet>1446</a> <span class="self">self</span>.table.process_user_written_ty(ty) |
| <a href=#1447 id=1447 data-nosnippet>1447</a> } |
| <a href=#1448 id=1448 data-nosnippet>1448</a> |
| <a href=#1449 id=1449 data-nosnippet>1449</a> <span class="doccomment">/// The difference of this method from `process_user_written_ty()` is that this method doesn't register a well-formed obligation, |
| <a href=#1450 id=1450 data-nosnippet>1450</a> /// while `process_user_written_ty()` should (but doesn't currently). |
| <a href=#1451 id=1451 data-nosnippet>1451</a> </span><span class="kw">fn </span>process_remote_user_written_ty(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1452 id=1452 data-nosnippet>1452</a> <span class="self">self</span>.table.process_remote_user_written_ty(ty) |
| <a href=#1453 id=1453 data-nosnippet>1453</a> } |
| <a href=#1454 id=1454 data-nosnippet>1454</a> |
| <a href=#1455 id=1455 data-nosnippet>1455</a> <span class="kw">fn </span>shallow_resolve(<span class="kw-2">&</span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1456 id=1456 data-nosnippet>1456</a> <span class="self">self</span>.table.shallow_resolve(ty) |
| <a href=#1457 id=1457 data-nosnippet>1457</a> } |
| <a href=#1458 id=1458 data-nosnippet>1458</a> |
| <a href=#1459 id=1459 data-nosnippet>1459</a> <span class="kw">fn </span>resolve_associated_type( |
| <a href=#1460 id=1460 data-nosnippet>1460</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1461 id=1461 data-nosnippet>1461</a> inner_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1462 id=1462 data-nosnippet>1462</a> assoc_ty: <span class="prelude-ty">Option</span><TypeAliasId>, |
| <a href=#1463 id=1463 data-nosnippet>1463</a> ) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1464 id=1464 data-nosnippet>1464</a> <span class="self">self</span>.resolve_associated_type_with_params(inner_ty, assoc_ty, <span class="kw-2">&</span>[]) |
| <a href=#1465 id=1465 data-nosnippet>1465</a> } |
| <a href=#1466 id=1466 data-nosnippet>1466</a> |
| <a href=#1467 id=1467 data-nosnippet>1467</a> <span class="kw">fn </span>demand_eqtype( |
| <a href=#1468 id=1468 data-nosnippet>1468</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1469 id=1469 data-nosnippet>1469</a> id: ExprOrPatId, |
| <a href=#1470 id=1470 data-nosnippet>1470</a> expected: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1471 id=1471 data-nosnippet>1471</a> actual: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1472 id=1472 data-nosnippet>1472</a> ) -> <span class="prelude-ty">Result</span><(), ()> { |
| <a href=#1473 id=1473 data-nosnippet>1473</a> <span class="kw">let </span>result = <span class="self">self</span>.demand_eqtype_fixme_no_diag(expected, actual); |
| <a href=#1474 id=1474 data-nosnippet>1474</a> <span class="kw">if </span>result.is_err() { |
| <a href=#1475 id=1475 data-nosnippet>1475</a> <span class="self">self</span>.result |
| <a href=#1476 id=1476 data-nosnippet>1476</a> .type_mismatches |
| <a href=#1477 id=1477 data-nosnippet>1477</a> .get_or_insert_default() |
| <a href=#1478 id=1478 data-nosnippet>1478</a> .insert(id, TypeMismatch { expected: expected.store(), actual: actual.store() }); |
| <a href=#1479 id=1479 data-nosnippet>1479</a> } |
| <a href=#1480 id=1480 data-nosnippet>1480</a> result |
| <a href=#1481 id=1481 data-nosnippet>1481</a> } |
| <a href=#1482 id=1482 data-nosnippet>1482</a> |
| <a href=#1483 id=1483 data-nosnippet>1483</a> <span class="kw">fn </span>demand_eqtype_fixme_no_diag( |
| <a href=#1484 id=1484 data-nosnippet>1484</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1485 id=1485 data-nosnippet>1485</a> expected: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1486 id=1486 data-nosnippet>1486</a> actual: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1487 id=1487 data-nosnippet>1487</a> ) -> <span class="prelude-ty">Result</span><(), ()> { |
| <a href=#1488 id=1488 data-nosnippet>1488</a> <span class="kw">let </span>result = <span class="self">self |
| <a href=#1489 id=1489 data-nosnippet>1489</a> </span>.table |
| <a href=#1490 id=1490 data-nosnippet>1490</a> .at(<span class="kw-2">&</span>ObligationCause::new()) |
| <a href=#1491 id=1491 data-nosnippet>1491</a> .eq(expected, actual) |
| <a href=#1492 id=1492 data-nosnippet>1492</a> .map(|infer_ok| <span class="self">self</span>.table.register_infer_ok(infer_ok)); |
| <a href=#1493 id=1493 data-nosnippet>1493</a> result.map_err(drop) |
| <a href=#1494 id=1494 data-nosnippet>1494</a> } |
| <a href=#1495 id=1495 data-nosnippet>1495</a> |
| <a href=#1496 id=1496 data-nosnippet>1496</a> <span class="kw">fn </span>demand_suptype(<span class="kw-2">&mut </span><span class="self">self</span>, expected: Ty<<span class="lifetime">'db</span>>, actual: Ty<<span class="lifetime">'db</span>>) { |
| <a href=#1497 id=1497 data-nosnippet>1497</a> <span class="kw">let </span>result = <span class="self">self |
| <a href=#1498 id=1498 data-nosnippet>1498</a> </span>.table |
| <a href=#1499 id=1499 data-nosnippet>1499</a> .at(<span class="kw-2">&</span>ObligationCause::new()) |
| <a href=#1500 id=1500 data-nosnippet>1500</a> .sup(expected, actual) |
| <a href=#1501 id=1501 data-nosnippet>1501</a> .map(|infer_ok| <span class="self">self</span>.table.register_infer_ok(infer_ok)); |
| <a href=#1502 id=1502 data-nosnippet>1502</a> <span class="kw">if let </span><span class="prelude-val">Err</span>(_err) = result { |
| <a href=#1503 id=1503 data-nosnippet>1503</a> <span class="comment">// FIXME: Emit diagnostic. |
| <a href=#1504 id=1504 data-nosnippet>1504</a> </span>} |
| <a href=#1505 id=1505 data-nosnippet>1505</a> } |
| <a href=#1506 id=1506 data-nosnippet>1506</a> |
| <a href=#1507 id=1507 data-nosnippet>1507</a> <span class="kw">fn </span>demand_coerce( |
| <a href=#1508 id=1508 data-nosnippet>1508</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1509 id=1509 data-nosnippet>1509</a> expr: ExprId, |
| <a href=#1510 id=1510 data-nosnippet>1510</a> checked_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1511 id=1511 data-nosnippet>1511</a> expected: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1512 id=1512 data-nosnippet>1512</a> allow_two_phase: AllowTwoPhase, |
| <a href=#1513 id=1513 data-nosnippet>1513</a> expr_is_read: ExprIsRead, |
| <a href=#1514 id=1514 data-nosnippet>1514</a> ) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1515 id=1515 data-nosnippet>1515</a> <span class="kw">let </span>result = <span class="self">self</span>.coerce(expr.into(), checked_ty, expected, allow_two_phase, expr_is_read); |
| <a href=#1516 id=1516 data-nosnippet>1516</a> <span class="kw">if let </span><span class="prelude-val">Err</span>(_err) = result { |
| <a href=#1517 id=1517 data-nosnippet>1517</a> <span class="comment">// FIXME: Emit diagnostic. |
| <a href=#1518 id=1518 data-nosnippet>1518</a> </span>} |
| <a href=#1519 id=1519 data-nosnippet>1519</a> result.unwrap_or(<span class="self">self</span>.types.types.error) |
| <a href=#1520 id=1520 data-nosnippet>1520</a> } |
| <a href=#1521 id=1521 data-nosnippet>1521</a> |
| <a href=#1522 id=1522 data-nosnippet>1522</a> <span class="kw">fn </span>expr_ty(<span class="kw-2">&</span><span class="self">self</span>, expr: ExprId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1523 id=1523 data-nosnippet>1523</a> <span class="self">self</span>.result.expr_ty(expr) |
| <a href=#1524 id=1524 data-nosnippet>1524</a> } |
| <a href=#1525 id=1525 data-nosnippet>1525</a> |
| <a href=#1526 id=1526 data-nosnippet>1526</a> <span class="kw">fn </span>expr_ty_after_adjustments(<span class="kw-2">&</span><span class="self">self</span>, e: ExprId) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1527 id=1527 data-nosnippet>1527</a> <span class="kw">let </span><span class="kw-2">mut </span>ty = <span class="prelude-val">None</span>; |
| <a href=#1528 id=1528 data-nosnippet>1528</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(it) = <span class="self">self</span>.result.expr_adjustments.get(<span class="kw-2">&</span>e) |
| <a href=#1529 id=1529 data-nosnippet>1529</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(it) = it.last() |
| <a href=#1530 id=1530 data-nosnippet>1530</a> { |
| <a href=#1531 id=1531 data-nosnippet>1531</a> ty = <span class="prelude-val">Some</span>(it.target.as_ref()); |
| <a href=#1532 id=1532 data-nosnippet>1532</a> } |
| <a href=#1533 id=1533 data-nosnippet>1533</a> ty.unwrap_or_else(|| <span class="self">self</span>.expr_ty(e)) |
| <a href=#1534 id=1534 data-nosnippet>1534</a> } |
| <a href=#1535 id=1535 data-nosnippet>1535</a> |
| <a href=#1536 id=1536 data-nosnippet>1536</a> <span class="kw">fn </span>resolve_associated_type_with_params( |
| <a href=#1537 id=1537 data-nosnippet>1537</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1538 id=1538 data-nosnippet>1538</a> inner_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1539 id=1539 data-nosnippet>1539</a> assoc_ty: <span class="prelude-ty">Option</span><TypeAliasId>, |
| <a href=#1540 id=1540 data-nosnippet>1540</a> <span class="comment">// FIXME(GATs): these are args for the trait ref, args for assoc type itself should be |
| <a href=#1541 id=1541 data-nosnippet>1541</a> // handled when we support them. |
| <a href=#1542 id=1542 data-nosnippet>1542</a> </span>params: <span class="kw-2">&</span>[GenericArg<<span class="lifetime">'db</span>>], |
| <a href=#1543 id=1543 data-nosnippet>1543</a> ) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1544 id=1544 data-nosnippet>1544</a> <span class="kw">match </span>assoc_ty { |
| <a href=#1545 id=1545 data-nosnippet>1545</a> <span class="prelude-val">Some</span>(res_assoc_ty) => { |
| <a href=#1546 id=1546 data-nosnippet>1546</a> <span class="kw">let </span>alias = Ty::new_alias( |
| <a href=#1547 id=1547 data-nosnippet>1547</a> <span class="self">self</span>.interner(), |
| <a href=#1548 id=1548 data-nosnippet>1548</a> AliasTyKind::Projection, |
| <a href=#1549 id=1549 data-nosnippet>1549</a> AliasTy::new( |
| <a href=#1550 id=1550 data-nosnippet>1550</a> <span class="self">self</span>.interner(), |
| <a href=#1551 id=1551 data-nosnippet>1551</a> res_assoc_ty.into(), |
| <a href=#1552 id=1552 data-nosnippet>1552</a> iter::once(inner_ty.into()).chain(params.iter().copied()), |
| <a href=#1553 id=1553 data-nosnippet>1553</a> ), |
| <a href=#1554 id=1554 data-nosnippet>1554</a> ); |
| <a href=#1555 id=1555 data-nosnippet>1555</a> <span class="self">self</span>.table.try_structurally_resolve_type(alias) |
| <a href=#1556 id=1556 data-nosnippet>1556</a> } |
| <a href=#1557 id=1557 data-nosnippet>1557</a> <span class="prelude-val">None </span>=> <span class="self">self</span>.err_ty(), |
| <a href=#1558 id=1558 data-nosnippet>1558</a> } |
| <a href=#1559 id=1559 data-nosnippet>1559</a> } |
| <a href=#1560 id=1560 data-nosnippet>1560</a> |
| <a href=#1561 id=1561 data-nosnippet>1561</a> <span class="kw">fn </span>resolve_variant( |
| <a href=#1562 id=1562 data-nosnippet>1562</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1563 id=1563 data-nosnippet>1563</a> node: ExprOrPatId, |
| <a href=#1564 id=1564 data-nosnippet>1564</a> path: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>Path>, |
| <a href=#1565 id=1565 data-nosnippet>1565</a> value_ns: bool, |
| <a href=#1566 id=1566 data-nosnippet>1566</a> ) -> (Ty<<span class="lifetime">'db</span>>, <span class="prelude-ty">Option</span><VariantId>) { |
| <a href=#1567 id=1567 data-nosnippet>1567</a> <span class="kw">let </span>path = <span class="kw">match </span>path { |
| <a href=#1568 id=1568 data-nosnippet>1568</a> <span class="prelude-val">Some</span>(path) => path, |
| <a href=#1569 id=1569 data-nosnippet>1569</a> <span class="prelude-val">None </span>=> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>), |
| <a href=#1570 id=1570 data-nosnippet>1570</a> }; |
| <a href=#1571 id=1571 data-nosnippet>1571</a> <span class="kw">let </span><span class="kw-2">mut </span>ctx = TyLoweringContext::new( |
| <a href=#1572 id=1572 data-nosnippet>1572</a> <span class="self">self</span>.db, |
| <a href=#1573 id=1573 data-nosnippet>1573</a> <span class="kw-2">&</span><span class="self">self</span>.resolver, |
| <a href=#1574 id=1574 data-nosnippet>1574</a> <span class="kw-2">&</span><span class="self">self</span>.body.store, |
| <a href=#1575 id=1575 data-nosnippet>1575</a> <span class="kw-2">&</span><span class="self">self</span>.diagnostics, |
| <a href=#1576 id=1576 data-nosnippet>1576</a> InferenceTyDiagnosticSource::Body, |
| <a href=#1577 id=1577 data-nosnippet>1577</a> <span class="self">self</span>.generic_def, |
| <a href=#1578 id=1578 data-nosnippet>1578</a> LifetimeElisionKind::Infer, |
| <a href=#1579 id=1579 data-nosnippet>1579</a> ); |
| <a href=#1580 id=1580 data-nosnippet>1580</a> <span class="kw">let </span><span class="kw-2">mut </span>path_ctx = ctx.at_path(path, node); |
| <a href=#1581 id=1581 data-nosnippet>1581</a> <span class="kw">let </span>interner = DbInterner::conjure(); |
| <a href=#1582 id=1582 data-nosnippet>1582</a> <span class="kw">let </span>(resolution, unresolved) = <span class="kw">if </span>value_ns { |
| <a href=#1583 id=1583 data-nosnippet>1583</a> <span class="kw">let </span><span class="prelude-val">Some</span>(res) = path_ctx.resolve_path_in_value_ns(HygieneId::ROOT) <span class="kw">else </span>{ |
| <a href=#1584 id=1584 data-nosnippet>1584</a> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>); |
| <a href=#1585 id=1585 data-nosnippet>1585</a> }; |
| <a href=#1586 id=1586 data-nosnippet>1586</a> <span class="kw">match </span>res { |
| <a href=#1587 id=1587 data-nosnippet>1587</a> ResolveValueResult::ValueNs(value) => <span class="kw">match </span>value { |
| <a href=#1588 id=1588 data-nosnippet>1588</a> ValueNs::EnumVariantId(var) => { |
| <a href=#1589 id=1589 data-nosnippet>1589</a> <span class="kw">let </span>args = path_ctx.substs_from_path(var.into(), <span class="bool-val">true</span>, <span class="bool-val">false</span>); |
| <a href=#1590 id=1590 data-nosnippet>1590</a> drop(ctx); |
| <a href=#1591 id=1591 data-nosnippet>1591</a> <span class="kw">let </span>ty = <span class="self">self |
| <a href=#1592 id=1592 data-nosnippet>1592</a> </span>.db |
| <a href=#1593 id=1593 data-nosnippet>1593</a> .ty(var.lookup(<span class="self">self</span>.db).parent.into()) |
| <a href=#1594 id=1594 data-nosnippet>1594</a> .instantiate(interner, args); |
| <a href=#1595 id=1595 data-nosnippet>1595</a> <span class="kw">let </span>ty = <span class="self">self</span>.insert_type_vars(ty); |
| <a href=#1596 id=1596 data-nosnippet>1596</a> <span class="kw">return </span>(ty, <span class="prelude-val">Some</span>(var.into())); |
| <a href=#1597 id=1597 data-nosnippet>1597</a> } |
| <a href=#1598 id=1598 data-nosnippet>1598</a> ValueNs::StructId(strukt) => { |
| <a href=#1599 id=1599 data-nosnippet>1599</a> <span class="kw">let </span>args = path_ctx.substs_from_path(strukt.into(), <span class="bool-val">true</span>, <span class="bool-val">false</span>); |
| <a href=#1600 id=1600 data-nosnippet>1600</a> drop(ctx); |
| <a href=#1601 id=1601 data-nosnippet>1601</a> <span class="kw">let </span>ty = <span class="self">self</span>.db.ty(strukt.into()).instantiate(interner, args); |
| <a href=#1602 id=1602 data-nosnippet>1602</a> <span class="kw">let </span>ty = <span class="self">self</span>.insert_type_vars(ty); |
| <a href=#1603 id=1603 data-nosnippet>1603</a> <span class="kw">return </span>(ty, <span class="prelude-val">Some</span>(strukt.into())); |
| <a href=#1604 id=1604 data-nosnippet>1604</a> } |
| <a href=#1605 id=1605 data-nosnippet>1605</a> ValueNs::ImplSelf(impl_id) => (TypeNs::SelfType(impl_id), <span class="prelude-val">None</span>), |
| <a href=#1606 id=1606 data-nosnippet>1606</a> <span class="kw">_ </span>=> { |
| <a href=#1607 id=1607 data-nosnippet>1607</a> drop(ctx); |
| <a href=#1608 id=1608 data-nosnippet>1608</a> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>); |
| <a href=#1609 id=1609 data-nosnippet>1609</a> } |
| <a href=#1610 id=1610 data-nosnippet>1610</a> }, |
| <a href=#1611 id=1611 data-nosnippet>1611</a> ResolveValueResult::Partial(typens, unresolved) => (typens, <span class="prelude-val">Some</span>(unresolved)), |
| <a href=#1612 id=1612 data-nosnippet>1612</a> } |
| <a href=#1613 id=1613 data-nosnippet>1613</a> } <span class="kw">else </span>{ |
| <a href=#1614 id=1614 data-nosnippet>1614</a> <span class="kw">match </span>path_ctx.resolve_path_in_type_ns() { |
| <a href=#1615 id=1615 data-nosnippet>1615</a> <span class="prelude-val">Some</span>((it, idx)) => (it, idx), |
| <a href=#1616 id=1616 data-nosnippet>1616</a> <span class="prelude-val">None </span>=> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>), |
| <a href=#1617 id=1617 data-nosnippet>1617</a> } |
| <a href=#1618 id=1618 data-nosnippet>1618</a> }; |
| <a href=#1619 id=1619 data-nosnippet>1619</a> <span class="kw">return match </span>resolution { |
| <a href=#1620 id=1620 data-nosnippet>1620</a> TypeNs::AdtId(AdtId::StructId(strukt)) => { |
| <a href=#1621 id=1621 data-nosnippet>1621</a> <span class="kw">let </span>args = path_ctx.substs_from_path(strukt.into(), <span class="bool-val">true</span>, <span class="bool-val">false</span>); |
| <a href=#1622 id=1622 data-nosnippet>1622</a> drop(ctx); |
| <a href=#1623 id=1623 data-nosnippet>1623</a> <span class="kw">let </span>ty = <span class="self">self</span>.db.ty(strukt.into()).instantiate(interner, args); |
| <a href=#1624 id=1624 data-nosnippet>1624</a> <span class="kw">let </span>ty = <span class="self">self</span>.insert_type_vars(ty); |
| <a href=#1625 id=1625 data-nosnippet>1625</a> forbid_unresolved_segments(<span class="self">self</span>, (ty, <span class="prelude-val">Some</span>(strukt.into())), unresolved) |
| <a href=#1626 id=1626 data-nosnippet>1626</a> } |
| <a href=#1627 id=1627 data-nosnippet>1627</a> TypeNs::AdtId(AdtId::UnionId(u)) => { |
| <a href=#1628 id=1628 data-nosnippet>1628</a> <span class="kw">let </span>args = path_ctx.substs_from_path(u.into(), <span class="bool-val">true</span>, <span class="bool-val">false</span>); |
| <a href=#1629 id=1629 data-nosnippet>1629</a> drop(ctx); |
| <a href=#1630 id=1630 data-nosnippet>1630</a> <span class="kw">let </span>ty = <span class="self">self</span>.db.ty(u.into()).instantiate(interner, args); |
| <a href=#1631 id=1631 data-nosnippet>1631</a> <span class="kw">let </span>ty = <span class="self">self</span>.insert_type_vars(ty); |
| <a href=#1632 id=1632 data-nosnippet>1632</a> forbid_unresolved_segments(<span class="self">self</span>, (ty, <span class="prelude-val">Some</span>(u.into())), unresolved) |
| <a href=#1633 id=1633 data-nosnippet>1633</a> } |
| <a href=#1634 id=1634 data-nosnippet>1634</a> TypeNs::EnumVariantId(var) => { |
| <a href=#1635 id=1635 data-nosnippet>1635</a> <span class="kw">let </span>args = path_ctx.substs_from_path(var.into(), <span class="bool-val">true</span>, <span class="bool-val">false</span>); |
| <a href=#1636 id=1636 data-nosnippet>1636</a> drop(ctx); |
| <a href=#1637 id=1637 data-nosnippet>1637</a> <span class="kw">let </span>ty = <span class="self">self</span>.db.ty(var.lookup(<span class="self">self</span>.db).parent.into()).instantiate(interner, args); |
| <a href=#1638 id=1638 data-nosnippet>1638</a> <span class="kw">let </span>ty = <span class="self">self</span>.insert_type_vars(ty); |
| <a href=#1639 id=1639 data-nosnippet>1639</a> forbid_unresolved_segments(<span class="self">self</span>, (ty, <span class="prelude-val">Some</span>(var.into())), unresolved) |
| <a href=#1640 id=1640 data-nosnippet>1640</a> } |
| <a href=#1641 id=1641 data-nosnippet>1641</a> TypeNs::SelfType(impl_id) => { |
| <a href=#1642 id=1642 data-nosnippet>1642</a> <span class="kw">let </span><span class="kw-2">mut </span>ty = <span class="self">self</span>.db.impl_self_ty(impl_id).instantiate_identity(); |
| <a href=#1643 id=1643 data-nosnippet>1643</a> |
| <a href=#1644 id=1644 data-nosnippet>1644</a> <span class="kw">let </span><span class="prelude-val">Some</span>(remaining_idx) = unresolved <span class="kw">else </span>{ |
| <a href=#1645 id=1645 data-nosnippet>1645</a> drop(ctx); |
| <a href=#1646 id=1646 data-nosnippet>1646</a> <span class="kw">let </span><span class="prelude-val">Some</span>(mod_path) = path.mod_path() <span class="kw">else </span>{ |
| <a href=#1647 id=1647 data-nosnippet>1647</a> <span class="macro">never!</span>(<span class="string">"resolver should always resolve lang item paths"</span>); |
| <a href=#1648 id=1648 data-nosnippet>1648</a> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>); |
| <a href=#1649 id=1649 data-nosnippet>1649</a> }; |
| <a href=#1650 id=1650 data-nosnippet>1650</a> <span class="kw">return </span><span class="self">self</span>.resolve_variant_on_alias(ty, <span class="prelude-val">None</span>, mod_path); |
| <a href=#1651 id=1651 data-nosnippet>1651</a> }; |
| <a href=#1652 id=1652 data-nosnippet>1652</a> |
| <a href=#1653 id=1653 data-nosnippet>1653</a> <span class="kw">let </span><span class="kw-2">mut </span>remaining_segments = path.segments().skip(remaining_idx); |
| <a href=#1654 id=1654 data-nosnippet>1654</a> |
| <a href=#1655 id=1655 data-nosnippet>1655</a> <span class="kw">if </span>remaining_segments.len() >= <span class="number">2 </span>{ |
| <a href=#1656 id=1656 data-nosnippet>1656</a> path_ctx.ignore_last_segment(); |
| <a href=#1657 id=1657 data-nosnippet>1657</a> } |
| <a href=#1658 id=1658 data-nosnippet>1658</a> |
| <a href=#1659 id=1659 data-nosnippet>1659</a> <span class="comment">// We need to try resolving unresolved segments one by one because each may resolve |
| <a href=#1660 id=1660 data-nosnippet>1660</a> // to a projection, which `TyLoweringContext` cannot handle on its own. |
| <a href=#1661 id=1661 data-nosnippet>1661</a> </span><span class="kw">let </span><span class="kw-2">mut </span>tried_resolving_once = <span class="bool-val">false</span>; |
| <a href=#1662 id=1662 data-nosnippet>1662</a> <span class="kw">while let </span><span class="prelude-val">Some</span>(current_segment) = remaining_segments.first() { |
| <a href=#1663 id=1663 data-nosnippet>1663</a> <span class="comment">// If we can resolve to an enum variant, it takes priority over associated type |
| <a href=#1664 id=1664 data-nosnippet>1664</a> // of the same name. |
| <a href=#1665 id=1665 data-nosnippet>1665</a> </span><span class="kw">if let </span>TyKind::Adt(adt_def, <span class="kw">_</span>) = ty.kind() |
| <a href=#1666 id=1666 data-nosnippet>1666</a> && <span class="kw">let </span>AdtId::EnumId(id) = adt_def.def_id().<span class="number">0 |
| <a href=#1667 id=1667 data-nosnippet>1667</a> </span>{ |
| <a href=#1668 id=1668 data-nosnippet>1668</a> <span class="kw">let </span>enum_data = id.enum_variants(<span class="self">self</span>.db); |
| <a href=#1669 id=1669 data-nosnippet>1669</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(variant) = enum_data.variant(current_segment.name) { |
| <a href=#1670 id=1670 data-nosnippet>1670</a> <span class="kw">return if </span>remaining_segments.len() == <span class="number">1 </span>{ |
| <a href=#1671 id=1671 data-nosnippet>1671</a> (ty, <span class="prelude-val">Some</span>(variant.into())) |
| <a href=#1672 id=1672 data-nosnippet>1672</a> } <span class="kw">else </span>{ |
| <a href=#1673 id=1673 data-nosnippet>1673</a> <span class="comment">// We still have unresolved paths, but enum variants never have |
| <a href=#1674 id=1674 data-nosnippet>1674</a> // associated types! |
| <a href=#1675 id=1675 data-nosnippet>1675</a> // FIXME: Report an error. |
| <a href=#1676 id=1676 data-nosnippet>1676</a> </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>) |
| <a href=#1677 id=1677 data-nosnippet>1677</a> }; |
| <a href=#1678 id=1678 data-nosnippet>1678</a> } |
| <a href=#1679 id=1679 data-nosnippet>1679</a> } |
| <a href=#1680 id=1680 data-nosnippet>1680</a> |
| <a href=#1681 id=1681 data-nosnippet>1681</a> <span class="kw">if </span>tried_resolving_once { |
| <a href=#1682 id=1682 data-nosnippet>1682</a> <span class="comment">// FIXME: with `inherent_associated_types` this is allowed, but our `lower_partly_resolved_path()` |
| <a href=#1683 id=1683 data-nosnippet>1683</a> // will need to be updated to err at the correct segment. |
| <a href=#1684 id=1684 data-nosnippet>1684</a> </span><span class="kw">break</span>; |
| <a href=#1685 id=1685 data-nosnippet>1685</a> } |
| <a href=#1686 id=1686 data-nosnippet>1686</a> |
| <a href=#1687 id=1687 data-nosnippet>1687</a> <span class="comment">// `lower_partly_resolved_path()` returns `None` as type namespace unless |
| <a href=#1688 id=1688 data-nosnippet>1688</a> // `remaining_segments` is empty, which is never the case here. We don't know |
| <a href=#1689 id=1689 data-nosnippet>1689</a> // which namespace the new `ty` is in until normalized anyway. |
| <a href=#1690 id=1690 data-nosnippet>1690</a> </span>(ty, <span class="kw">_</span>) = path_ctx.lower_partly_resolved_path(resolution, <span class="bool-val">true</span>); |
| <a href=#1691 id=1691 data-nosnippet>1691</a> tried_resolving_once = <span class="bool-val">true</span>; |
| <a href=#1692 id=1692 data-nosnippet>1692</a> |
| <a href=#1693 id=1693 data-nosnippet>1693</a> ty = <span class="self">self</span>.table.process_user_written_ty(ty); |
| <a href=#1694 id=1694 data-nosnippet>1694</a> <span class="kw">if </span>ty.is_ty_error() { |
| <a href=#1695 id=1695 data-nosnippet>1695</a> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>); |
| <a href=#1696 id=1696 data-nosnippet>1696</a> } |
| <a href=#1697 id=1697 data-nosnippet>1697</a> |
| <a href=#1698 id=1698 data-nosnippet>1698</a> remaining_segments = remaining_segments.skip(<span class="number">1</span>); |
| <a href=#1699 id=1699 data-nosnippet>1699</a> } |
| <a href=#1700 id=1700 data-nosnippet>1700</a> drop(ctx); |
| <a href=#1701 id=1701 data-nosnippet>1701</a> |
| <a href=#1702 id=1702 data-nosnippet>1702</a> <span class="kw">let </span>variant = ty.as_adt().and_then(|(id, <span class="kw">_</span>)| <span class="kw">match </span>id { |
| <a href=#1703 id=1703 data-nosnippet>1703</a> AdtId::StructId(s) => <span class="prelude-val">Some</span>(VariantId::StructId(s)), |
| <a href=#1704 id=1704 data-nosnippet>1704</a> AdtId::UnionId(u) => <span class="prelude-val">Some</span>(VariantId::UnionId(u)), |
| <a href=#1705 id=1705 data-nosnippet>1705</a> AdtId::EnumId(<span class="kw">_</span>) => { |
| <a href=#1706 id=1706 data-nosnippet>1706</a> <span class="comment">// FIXME Error E0071, expected struct, variant or union type, found enum `Foo` |
| <a href=#1707 id=1707 data-nosnippet>1707</a> </span><span class="prelude-val">None |
| <a href=#1708 id=1708 data-nosnippet>1708</a> </span>} |
| <a href=#1709 id=1709 data-nosnippet>1709</a> }); |
| <a href=#1710 id=1710 data-nosnippet>1710</a> (ty, variant) |
| <a href=#1711 id=1711 data-nosnippet>1711</a> } |
| <a href=#1712 id=1712 data-nosnippet>1712</a> TypeNs::TypeAliasId(it) => { |
| <a href=#1713 id=1713 data-nosnippet>1713</a> <span class="kw">let </span><span class="prelude-val">Some</span>(mod_path) = path.mod_path() <span class="kw">else </span>{ |
| <a href=#1714 id=1714 data-nosnippet>1714</a> <span class="macro">never!</span>(<span class="string">"resolver should always resolve lang item paths"</span>); |
| <a href=#1715 id=1715 data-nosnippet>1715</a> <span class="kw">return </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>); |
| <a href=#1716 id=1716 data-nosnippet>1716</a> }; |
| <a href=#1717 id=1717 data-nosnippet>1717</a> <span class="kw">let </span>args = path_ctx.substs_from_path_segment(it.into(), <span class="bool-val">true</span>, <span class="prelude-val">None</span>, <span class="bool-val">false</span>); |
| <a href=#1718 id=1718 data-nosnippet>1718</a> drop(ctx); |
| <a href=#1719 id=1719 data-nosnippet>1719</a> <span class="kw">let </span>interner = DbInterner::conjure(); |
| <a href=#1720 id=1720 data-nosnippet>1720</a> <span class="kw">let </span>ty = <span class="self">self</span>.db.ty(it.into()).instantiate(interner, args); |
| <a href=#1721 id=1721 data-nosnippet>1721</a> <span class="kw">let </span>ty = <span class="self">self</span>.insert_type_vars(ty); |
| <a href=#1722 id=1722 data-nosnippet>1722</a> |
| <a href=#1723 id=1723 data-nosnippet>1723</a> <span class="self">self</span>.resolve_variant_on_alias(ty, unresolved, mod_path) |
| <a href=#1724 id=1724 data-nosnippet>1724</a> } |
| <a href=#1725 id=1725 data-nosnippet>1725</a> TypeNs::AdtSelfType(<span class="kw">_</span>) => { |
| <a href=#1726 id=1726 data-nosnippet>1726</a> <span class="comment">// FIXME this could happen in array size expressions, once we're checking them |
| <a href=#1727 id=1727 data-nosnippet>1727</a> </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>) |
| <a href=#1728 id=1728 data-nosnippet>1728</a> } |
| <a href=#1729 id=1729 data-nosnippet>1729</a> TypeNs::GenericParam(<span class="kw">_</span>) => { |
| <a href=#1730 id=1730 data-nosnippet>1730</a> <span class="comment">// FIXME potentially resolve assoc type |
| <a href=#1731 id=1731 data-nosnippet>1731</a> </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>) |
| <a href=#1732 id=1732 data-nosnippet>1732</a> } |
| <a href=#1733 id=1733 data-nosnippet>1733</a> TypeNs::AdtId(AdtId::EnumId(<span class="kw">_</span>)) |
| <a href=#1734 id=1734 data-nosnippet>1734</a> | TypeNs::BuiltinType(<span class="kw">_</span>) |
| <a href=#1735 id=1735 data-nosnippet>1735</a> | TypeNs::TraitId(<span class="kw">_</span>) |
| <a href=#1736 id=1736 data-nosnippet>1736</a> | TypeNs::ModuleId(<span class="kw">_</span>) => { |
| <a href=#1737 id=1737 data-nosnippet>1737</a> <span class="comment">// FIXME diagnostic |
| <a href=#1738 id=1738 data-nosnippet>1738</a> </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>) |
| <a href=#1739 id=1739 data-nosnippet>1739</a> } |
| <a href=#1740 id=1740 data-nosnippet>1740</a> }; |
| <a href=#1741 id=1741 data-nosnippet>1741</a> |
| <a href=#1742 id=1742 data-nosnippet>1742</a> <span class="kw">fn </span>forbid_unresolved_segments<<span class="lifetime">'db</span>>( |
| <a href=#1743 id=1743 data-nosnippet>1743</a> ctx: <span class="kw-2">&</span>InferenceContext<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>, |
| <a href=#1744 id=1744 data-nosnippet>1744</a> result: (Ty<<span class="lifetime">'db</span>>, <span class="prelude-ty">Option</span><VariantId>), |
| <a href=#1745 id=1745 data-nosnippet>1745</a> unresolved: <span class="prelude-ty">Option</span><usize>, |
| <a href=#1746 id=1746 data-nosnippet>1746</a> ) -> (Ty<<span class="lifetime">'db</span>>, <span class="prelude-ty">Option</span><VariantId>) { |
| <a href=#1747 id=1747 data-nosnippet>1747</a> <span class="kw">if </span>unresolved.is_none() { |
| <a href=#1748 id=1748 data-nosnippet>1748</a> result |
| <a href=#1749 id=1749 data-nosnippet>1749</a> } <span class="kw">else </span>{ |
| <a href=#1750 id=1750 data-nosnippet>1750</a> <span class="comment">// FIXME diagnostic |
| <a href=#1751 id=1751 data-nosnippet>1751</a> </span>(ctx.types.types.error, <span class="prelude-val">None</span>) |
| <a href=#1752 id=1752 data-nosnippet>1752</a> } |
| <a href=#1753 id=1753 data-nosnippet>1753</a> } |
| <a href=#1754 id=1754 data-nosnippet>1754</a> } |
| <a href=#1755 id=1755 data-nosnippet>1755</a> |
| <a href=#1756 id=1756 data-nosnippet>1756</a> <span class="kw">fn </span>resolve_variant_on_alias( |
| <a href=#1757 id=1757 data-nosnippet>1757</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1758 id=1758 data-nosnippet>1758</a> ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#1759 id=1759 data-nosnippet>1759</a> unresolved: <span class="prelude-ty">Option</span><usize>, |
| <a href=#1760 id=1760 data-nosnippet>1760</a> path: <span class="kw-2">&</span>ModPath, |
| <a href=#1761 id=1761 data-nosnippet>1761</a> ) -> (Ty<<span class="lifetime">'db</span>>, <span class="prelude-ty">Option</span><VariantId>) { |
| <a href=#1762 id=1762 data-nosnippet>1762</a> <span class="kw">let </span>remaining = unresolved.map(|it| path.segments()[it..].len()).filter(|it| it > <span class="kw-2">&</span><span class="number">0</span>); |
| <a href=#1763 id=1763 data-nosnippet>1763</a> <span class="kw">let </span>ty = <span class="self">self</span>.table.try_structurally_resolve_type(ty); |
| <a href=#1764 id=1764 data-nosnippet>1764</a> <span class="kw">match </span>remaining { |
| <a href=#1765 id=1765 data-nosnippet>1765</a> <span class="prelude-val">None </span>=> { |
| <a href=#1766 id=1766 data-nosnippet>1766</a> <span class="kw">let </span>variant = ty.as_adt().and_then(|(adt_id, <span class="kw">_</span>)| <span class="kw">match </span>adt_id { |
| <a href=#1767 id=1767 data-nosnippet>1767</a> AdtId::StructId(s) => <span class="prelude-val">Some</span>(VariantId::StructId(s)), |
| <a href=#1768 id=1768 data-nosnippet>1768</a> AdtId::UnionId(u) => <span class="prelude-val">Some</span>(VariantId::UnionId(u)), |
| <a href=#1769 id=1769 data-nosnippet>1769</a> AdtId::EnumId(<span class="kw">_</span>) => { |
| <a href=#1770 id=1770 data-nosnippet>1770</a> <span class="comment">// FIXME Error E0071, expected struct, variant or union type, found enum `Foo` |
| <a href=#1771 id=1771 data-nosnippet>1771</a> </span><span class="prelude-val">None |
| <a href=#1772 id=1772 data-nosnippet>1772</a> </span>} |
| <a href=#1773 id=1773 data-nosnippet>1773</a> }); |
| <a href=#1774 id=1774 data-nosnippet>1774</a> (ty, variant) |
| <a href=#1775 id=1775 data-nosnippet>1775</a> } |
| <a href=#1776 id=1776 data-nosnippet>1776</a> <span class="prelude-val">Some</span>(<span class="number">1</span>) => { |
| <a href=#1777 id=1777 data-nosnippet>1777</a> <span class="kw">let </span>segment = path.segments().last().unwrap(); |
| <a href=#1778 id=1778 data-nosnippet>1778</a> <span class="comment">// this could be an enum variant or associated type |
| <a href=#1779 id=1779 data-nosnippet>1779</a> </span><span class="kw">if let </span><span class="prelude-val">Some</span>((AdtId::EnumId(enum_id), <span class="kw">_</span>)) = ty.as_adt() { |
| <a href=#1780 id=1780 data-nosnippet>1780</a> <span class="kw">let </span>enum_data = enum_id.enum_variants(<span class="self">self</span>.db); |
| <a href=#1781 id=1781 data-nosnippet>1781</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(variant) = enum_data.variant(segment) { |
| <a href=#1782 id=1782 data-nosnippet>1782</a> <span class="kw">return </span>(ty, <span class="prelude-val">Some</span>(variant.into())); |
| <a href=#1783 id=1783 data-nosnippet>1783</a> } |
| <a href=#1784 id=1784 data-nosnippet>1784</a> } |
| <a href=#1785 id=1785 data-nosnippet>1785</a> <span class="comment">// FIXME potentially resolve assoc type |
| <a href=#1786 id=1786 data-nosnippet>1786</a> </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>) |
| <a href=#1787 id=1787 data-nosnippet>1787</a> } |
| <a href=#1788 id=1788 data-nosnippet>1788</a> <span class="prelude-val">Some</span>(<span class="kw">_</span>) => { |
| <a href=#1789 id=1789 data-nosnippet>1789</a> <span class="comment">// FIXME diagnostic |
| <a href=#1790 id=1790 data-nosnippet>1790</a> </span>(<span class="self">self</span>.err_ty(), <span class="prelude-val">None</span>) |
| <a href=#1791 id=1791 data-nosnippet>1791</a> } |
| <a href=#1792 id=1792 data-nosnippet>1792</a> } |
| <a href=#1793 id=1793 data-nosnippet>1793</a> } |
| <a href=#1794 id=1794 data-nosnippet>1794</a> |
| <a href=#1795 id=1795 data-nosnippet>1795</a> <span class="kw">fn </span>resolve_output_on(<span class="kw-2">&</span><span class="self">self</span>, trait_: TraitId) -> <span class="prelude-ty">Option</span><TypeAliasId> { |
| <a href=#1796 id=1796 data-nosnippet>1796</a> trait_.trait_items(<span class="self">self</span>.db).associated_type_by_name(<span class="kw-2">&</span>Name::new_symbol_root(sym::Output)) |
| <a href=#1797 id=1797 data-nosnippet>1797</a> } |
| <a href=#1798 id=1798 data-nosnippet>1798</a> |
| <a href=#1799 id=1799 data-nosnippet>1799</a> <span class="kw">fn </span>resolve_future_future_output(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><TypeAliasId> { |
| <a href=#1800 id=1800 data-nosnippet>1800</a> <span class="kw">let </span>ItemContainerId::TraitId(trait_) = |
| <a href=#1801 id=1801 data-nosnippet>1801</a> <span class="self">self</span>.lang_items.IntoFutureIntoFuture<span class="question-mark">?</span>.lookup(<span class="self">self</span>.db).container |
| <a href=#1802 id=1802 data-nosnippet>1802</a> <span class="kw">else </span>{ |
| <a href=#1803 id=1803 data-nosnippet>1803</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#1804 id=1804 data-nosnippet>1804</a> }; |
| <a href=#1805 id=1805 data-nosnippet>1805</a> <span class="self">self</span>.resolve_output_on(trait_) |
| <a href=#1806 id=1806 data-nosnippet>1806</a> } |
| <a href=#1807 id=1807 data-nosnippet>1807</a> |
| <a href=#1808 id=1808 data-nosnippet>1808</a> <span class="kw">fn </span>resolve_boxed_box(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1809 id=1809 data-nosnippet>1809</a> <span class="kw">let </span>struct_ = <span class="self">self</span>.lang_items.OwnedBox<span class="question-mark">?</span>; |
| <a href=#1810 id=1810 data-nosnippet>1810</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1811 id=1811 data-nosnippet>1811</a> } |
| <a href=#1812 id=1812 data-nosnippet>1812</a> |
| <a href=#1813 id=1813 data-nosnippet>1813</a> <span class="kw">fn </span>resolve_range_full(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1814 id=1814 data-nosnippet>1814</a> <span class="kw">let </span>struct_ = <span class="self">self</span>.lang_items.RangeFull<span class="question-mark">?</span>; |
| <a href=#1815 id=1815 data-nosnippet>1815</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1816 id=1816 data-nosnippet>1816</a> } |
| <a href=#1817 id=1817 data-nosnippet>1817</a> |
| <a href=#1818 id=1818 data-nosnippet>1818</a> <span class="kw">fn </span>has_new_range_feature(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <a href=#1819 id=1819 data-nosnippet>1819</a> <span class="self">self</span>.resolver.top_level_def_map().is_unstable_feature_enabled(<span class="kw-2">&</span>sym::new_range) |
| <a href=#1820 id=1820 data-nosnippet>1820</a> } |
| <a href=#1821 id=1821 data-nosnippet>1821</a> |
| <a href=#1822 id=1822 data-nosnippet>1822</a> <span class="kw">fn </span>resolve_range(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1823 id=1823 data-nosnippet>1823</a> <span class="kw">let </span>struct_ = <span class="kw">if </span><span class="self">self</span>.has_new_range_feature() { |
| <a href=#1824 id=1824 data-nosnippet>1824</a> <span class="self">self</span>.lang_items.RangeCopy<span class="question-mark">? |
| <a href=#1825 id=1825 data-nosnippet>1825</a> </span>} <span class="kw">else </span>{ |
| <a href=#1826 id=1826 data-nosnippet>1826</a> <span class="self">self</span>.lang_items.Range<span class="question-mark">? |
| <a href=#1827 id=1827 data-nosnippet>1827</a> </span>}; |
| <a href=#1828 id=1828 data-nosnippet>1828</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1829 id=1829 data-nosnippet>1829</a> } |
| <a href=#1830 id=1830 data-nosnippet>1830</a> |
| <a href=#1831 id=1831 data-nosnippet>1831</a> <span class="kw">fn </span>resolve_range_inclusive(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1832 id=1832 data-nosnippet>1832</a> <span class="kw">let </span>struct_ = <span class="kw">if </span><span class="self">self</span>.has_new_range_feature() { |
| <a href=#1833 id=1833 data-nosnippet>1833</a> <span class="self">self</span>.lang_items.RangeInclusiveCopy<span class="question-mark">? |
| <a href=#1834 id=1834 data-nosnippet>1834</a> </span>} <span class="kw">else </span>{ |
| <a href=#1835 id=1835 data-nosnippet>1835</a> <span class="self">self</span>.lang_items.RangeInclusiveStruct<span class="question-mark">? |
| <a href=#1836 id=1836 data-nosnippet>1836</a> </span>}; |
| <a href=#1837 id=1837 data-nosnippet>1837</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1838 id=1838 data-nosnippet>1838</a> } |
| <a href=#1839 id=1839 data-nosnippet>1839</a> |
| <a href=#1840 id=1840 data-nosnippet>1840</a> <span class="kw">fn </span>resolve_range_from(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1841 id=1841 data-nosnippet>1841</a> <span class="kw">let </span>struct_ = <span class="kw">if </span><span class="self">self</span>.has_new_range_feature() { |
| <a href=#1842 id=1842 data-nosnippet>1842</a> <span class="self">self</span>.lang_items.RangeFromCopy<span class="question-mark">? |
| <a href=#1843 id=1843 data-nosnippet>1843</a> </span>} <span class="kw">else </span>{ |
| <a href=#1844 id=1844 data-nosnippet>1844</a> <span class="self">self</span>.lang_items.RangeFrom<span class="question-mark">? |
| <a href=#1845 id=1845 data-nosnippet>1845</a> </span>}; |
| <a href=#1846 id=1846 data-nosnippet>1846</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1847 id=1847 data-nosnippet>1847</a> } |
| <a href=#1848 id=1848 data-nosnippet>1848</a> |
| <a href=#1849 id=1849 data-nosnippet>1849</a> <span class="kw">fn </span>resolve_range_to(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1850 id=1850 data-nosnippet>1850</a> <span class="kw">let </span>struct_ = <span class="self">self</span>.lang_items.RangeTo<span class="question-mark">?</span>; |
| <a href=#1851 id=1851 data-nosnippet>1851</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1852 id=1852 data-nosnippet>1852</a> } |
| <a href=#1853 id=1853 data-nosnippet>1853</a> |
| <a href=#1854 id=1854 data-nosnippet>1854</a> <span class="kw">fn </span>resolve_range_to_inclusive(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1855 id=1855 data-nosnippet>1855</a> <span class="kw">let </span>struct_ = <span class="kw">if </span><span class="self">self</span>.has_new_range_feature() { |
| <a href=#1856 id=1856 data-nosnippet>1856</a> <span class="self">self</span>.lang_items.RangeToInclusiveCopy<span class="question-mark">? |
| <a href=#1857 id=1857 data-nosnippet>1857</a> </span>} <span class="kw">else </span>{ |
| <a href=#1858 id=1858 data-nosnippet>1858</a> <span class="self">self</span>.lang_items.RangeToInclusive<span class="question-mark">? |
| <a href=#1859 id=1859 data-nosnippet>1859</a> </span>}; |
| <a href=#1860 id=1860 data-nosnippet>1860</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1861 id=1861 data-nosnippet>1861</a> } |
| <a href=#1862 id=1862 data-nosnippet>1862</a> |
| <a href=#1863 id=1863 data-nosnippet>1863</a> <span class="kw">fn </span>resolve_va_list(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><AdtId> { |
| <a href=#1864 id=1864 data-nosnippet>1864</a> <span class="kw">let </span>struct_ = <span class="self">self</span>.lang_items.VaList<span class="question-mark">?</span>; |
| <a href=#1865 id=1865 data-nosnippet>1865</a> <span class="prelude-val">Some</span>(struct_.into()) |
| <a href=#1866 id=1866 data-nosnippet>1866</a> } |
| <a href=#1867 id=1867 data-nosnippet>1867</a> |
| <a href=#1868 id=1868 data-nosnippet>1868</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>get_traits_in_scope(<span class="kw-2">&</span><span class="self">self</span>) -> Either<FxHashSet<TraitId>, <span class="kw-2">&</span>FxHashSet<TraitId>> { |
| <a href=#1869 id=1869 data-nosnippet>1869</a> <span class="kw">let </span><span class="kw-2">mut </span>b_traits = <span class="self">self</span>.resolver.traits_in_scope_from_block_scopes().peekable(); |
| <a href=#1870 id=1870 data-nosnippet>1870</a> <span class="kw">if </span>b_traits.peek().is_some() { |
| <a href=#1871 id=1871 data-nosnippet>1871</a> Either::Left(<span class="self">self</span>.traits_in_scope.iter().copied().chain(b_traits).collect()) |
| <a href=#1872 id=1872 data-nosnippet>1872</a> } <span class="kw">else </span>{ |
| <a href=#1873 id=1873 data-nosnippet>1873</a> Either::Right(<span class="kw-2">&</span><span class="self">self</span>.traits_in_scope) |
| <a href=#1874 id=1874 data-nosnippet>1874</a> } |
| <a href=#1875 id=1875 data-nosnippet>1875</a> } |
| <a href=#1876 id=1876 data-nosnippet>1876</a>} |
| <a href=#1877 id=1877 data-nosnippet>1877</a> |
| <a href=#1878 id=1878 data-nosnippet>1878</a><span class="doccomment">/// When inferring an expression, we propagate downward whatever type hint we |
| <a href=#1879 id=1879 data-nosnippet>1879</a>/// are able in the form of an `Expectation`. |
| <a href=#1880 id=1880 data-nosnippet>1880</a></span><span class="attr">#[derive(Clone, PartialEq, Eq, Debug)] |
| <a href=#1881 id=1881 data-nosnippet>1881</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum </span>Expectation<<span class="lifetime">'db</span>> { |
| <a href=#1882 id=1882 data-nosnippet>1882</a> <span class="prelude-val">None</span>, |
| <a href=#1883 id=1883 data-nosnippet>1883</a> HasType(Ty<<span class="lifetime">'db</span>>), |
| <a href=#1884 id=1884 data-nosnippet>1884</a> Castable(Ty<<span class="lifetime">'db</span>>), |
| <a href=#1885 id=1885 data-nosnippet>1885</a> RValueLikeUnsized(Ty<<span class="lifetime">'db</span>>), |
| <a href=#1886 id=1886 data-nosnippet>1886</a>} |
| <a href=#1887 id=1887 data-nosnippet>1887</a> |
| <a href=#1888 id=1888 data-nosnippet>1888</a><span class="kw">impl</span><<span class="lifetime">'db</span>> Expectation<<span class="lifetime">'db</span>> { |
| <a href=#1889 id=1889 data-nosnippet>1889</a> <span class="doccomment">/// The expectation that the type of the expression needs to equal the given |
| <a href=#1890 id=1890 data-nosnippet>1890</a> /// type. |
| <a href=#1891 id=1891 data-nosnippet>1891</a> </span><span class="kw">fn </span>has_type(ty: Ty<<span class="lifetime">'db</span>>) -> <span class="self">Self </span>{ |
| <a href=#1892 id=1892 data-nosnippet>1892</a> <span class="kw">if </span>ty.is_ty_error() { |
| <a href=#1893 id=1893 data-nosnippet>1893</a> <span class="comment">// FIXME: get rid of this? |
| <a href=#1894 id=1894 data-nosnippet>1894</a> </span>Expectation::None |
| <a href=#1895 id=1895 data-nosnippet>1895</a> } <span class="kw">else </span>{ |
| <a href=#1896 id=1896 data-nosnippet>1896</a> Expectation::HasType(ty) |
| <a href=#1897 id=1897 data-nosnippet>1897</a> } |
| <a href=#1898 id=1898 data-nosnippet>1898</a> } |
| <a href=#1899 id=1899 data-nosnippet>1899</a> |
| <a href=#1900 id=1900 data-nosnippet>1900</a> <span class="doccomment">/// The following explanation is copied straight from rustc: |
| <a href=#1901 id=1901 data-nosnippet>1901</a> /// Provides an expectation for an rvalue expression given an *optional* |
| <a href=#1902 id=1902 data-nosnippet>1902</a> /// hint, which is not required for type safety (the resulting type might |
| <a href=#1903 id=1903 data-nosnippet>1903</a> /// be checked higher up, as is the case with `&expr` and `box expr`), but |
| <a href=#1904 id=1904 data-nosnippet>1904</a> /// is useful in determining the concrete type. |
| <a href=#1905 id=1905 data-nosnippet>1905</a> /// |
| <a href=#1906 id=1906 data-nosnippet>1906</a> /// The primary use case is where the expected type is a fat pointer, |
| <a href=#1907 id=1907 data-nosnippet>1907</a> /// like `&[isize]`. For example, consider the following statement: |
| <a href=#1908 id=1908 data-nosnippet>1908</a> /// |
| <a href=#1909 id=1909 data-nosnippet>1909</a> /// let it: &[isize] = &[1, 2, 3]; |
| <a href=#1910 id=1910 data-nosnippet>1910</a> /// |
| <a href=#1911 id=1911 data-nosnippet>1911</a> /// In this case, the expected type for the `&[1, 2, 3]` expression is |
| <a href=#1912 id=1912 data-nosnippet>1912</a> /// `&[isize]`. If however we were to say that `[1, 2, 3]` has the |
| <a href=#1913 id=1913 data-nosnippet>1913</a> /// expectation `ExpectHasType([isize])`, that would be too strong -- |
| <a href=#1914 id=1914 data-nosnippet>1914</a> /// `[1, 2, 3]` does not have the type `[isize]` but rather `[isize; 3]`. |
| <a href=#1915 id=1915 data-nosnippet>1915</a> /// It is only the `&[1, 2, 3]` expression as a whole that can be coerced |
| <a href=#1916 id=1916 data-nosnippet>1916</a> /// to the type `&[isize]`. Therefore, we propagate this more limited hint, |
| <a href=#1917 id=1917 data-nosnippet>1917</a> /// which still is useful, because it informs integer literals and the like. |
| <a href=#1918 id=1918 data-nosnippet>1918</a> /// See the test case `test/ui/coerce-expect-unsized.rs` and #20169 |
| <a href=#1919 id=1919 data-nosnippet>1919</a> /// for examples of where this comes up,. |
| <a href=#1920 id=1920 data-nosnippet>1920</a> </span><span class="kw">fn </span>rvalue_hint(ctx: <span class="kw-2">&mut </span>InferenceContext<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>, ty: Ty<<span class="lifetime">'db</span>>) -> <span class="self">Self </span>{ |
| <a href=#1921 id=1921 data-nosnippet>1921</a> <span class="kw">match </span>ctx.struct_tail_without_normalization(ty).kind() { |
| <a href=#1922 id=1922 data-nosnippet>1922</a> TyKind::Slice(<span class="kw">_</span>) | TyKind::Str | TyKind::Dynamic(..) => { |
| <a href=#1923 id=1923 data-nosnippet>1923</a> Expectation::RValueLikeUnsized(ty) |
| <a href=#1924 id=1924 data-nosnippet>1924</a> } |
| <a href=#1925 id=1925 data-nosnippet>1925</a> <span class="kw">_ </span>=> Expectation::has_type(ty), |
| <a href=#1926 id=1926 data-nosnippet>1926</a> } |
| <a href=#1927 id=1927 data-nosnippet>1927</a> } |
| <a href=#1928 id=1928 data-nosnippet>1928</a> |
| <a href=#1929 id=1929 data-nosnippet>1929</a> <span class="doccomment">/// This expresses no expectation on the type. |
| <a href=#1930 id=1930 data-nosnippet>1930</a> </span><span class="kw">fn </span>none() -> <span class="self">Self </span>{ |
| <a href=#1931 id=1931 data-nosnippet>1931</a> Expectation::None |
| <a href=#1932 id=1932 data-nosnippet>1932</a> } |
| <a href=#1933 id=1933 data-nosnippet>1933</a> |
| <a href=#1934 id=1934 data-nosnippet>1934</a> <span class="kw">fn </span>resolve(<span class="kw-2">&</span><span class="self">self</span>, table: <span class="kw-2">&mut </span>unify::InferenceTable<<span class="lifetime">'db</span>>) -> Expectation<<span class="lifetime">'db</span>> { |
| <a href=#1935 id=1935 data-nosnippet>1935</a> <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#1936 id=1936 data-nosnippet>1936</a> Expectation::None => Expectation::None, |
| <a href=#1937 id=1937 data-nosnippet>1937</a> Expectation::HasType(t) => Expectation::HasType(table.shallow_resolve(<span class="kw-2">*</span>t)), |
| <a href=#1938 id=1938 data-nosnippet>1938</a> Expectation::Castable(t) => Expectation::Castable(table.shallow_resolve(<span class="kw-2">*</span>t)), |
| <a href=#1939 id=1939 data-nosnippet>1939</a> Expectation::RValueLikeUnsized(t) => { |
| <a href=#1940 id=1940 data-nosnippet>1940</a> Expectation::RValueLikeUnsized(table.shallow_resolve(<span class="kw-2">*</span>t)) |
| <a href=#1941 id=1941 data-nosnippet>1941</a> } |
| <a href=#1942 id=1942 data-nosnippet>1942</a> } |
| <a href=#1943 id=1943 data-nosnippet>1943</a> } |
| <a href=#1944 id=1944 data-nosnippet>1944</a> |
| <a href=#1945 id=1945 data-nosnippet>1945</a> <span class="kw">fn </span>to_option(<span class="kw-2">&</span><span class="self">self</span>, table: <span class="kw-2">&mut </span>unify::InferenceTable<<span class="lifetime">'db</span>>) -> <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>> { |
| <a href=#1946 id=1946 data-nosnippet>1946</a> <span class="kw">match </span><span class="self">self</span>.resolve(table) { |
| <a href=#1947 id=1947 data-nosnippet>1947</a> Expectation::None => <span class="prelude-val">None</span>, |
| <a href=#1948 id=1948 data-nosnippet>1948</a> Expectation::HasType(t) |
| <a href=#1949 id=1949 data-nosnippet>1949</a> | Expectation::Castable(t) |
| <a href=#1950 id=1950 data-nosnippet>1950</a> | Expectation::RValueLikeUnsized(t) => <span class="prelude-val">Some</span>(t), |
| <a href=#1951 id=1951 data-nosnippet>1951</a> } |
| <a href=#1952 id=1952 data-nosnippet>1952</a> } |
| <a href=#1953 id=1953 data-nosnippet>1953</a> |
| <a href=#1954 id=1954 data-nosnippet>1954</a> <span class="kw">fn </span>only_has_type(<span class="kw-2">&</span><span class="self">self</span>, table: <span class="kw-2">&mut </span>unify::InferenceTable<<span class="lifetime">'db</span>>) -> <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>> { |
| <a href=#1955 id=1955 data-nosnippet>1955</a> <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#1956 id=1956 data-nosnippet>1956</a> Expectation::HasType(t) => <span class="prelude-val">Some</span>(table.shallow_resolve(<span class="kw-2">*</span>t)), |
| <a href=#1957 id=1957 data-nosnippet>1957</a> Expectation::Castable(<span class="kw">_</span>) | Expectation::RValueLikeUnsized(<span class="kw">_</span>) | Expectation::None => { |
| <a href=#1958 id=1958 data-nosnippet>1958</a> <span class="prelude-val">None |
| <a href=#1959 id=1959 data-nosnippet>1959</a> </span>} |
| <a href=#1960 id=1960 data-nosnippet>1960</a> } |
| <a href=#1961 id=1961 data-nosnippet>1961</a> } |
| <a href=#1962 id=1962 data-nosnippet>1962</a> |
| <a href=#1963 id=1963 data-nosnippet>1963</a> <span class="kw">fn </span>coercion_target_type(<span class="kw-2">&</span><span class="self">self</span>, table: <span class="kw-2">&mut </span>unify::InferenceTable<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#1964 id=1964 data-nosnippet>1964</a> <span class="self">self</span>.only_has_type(table).unwrap_or_else(|| table.next_ty_var()) |
| <a href=#1965 id=1965 data-nosnippet>1965</a> } |
| <a href=#1966 id=1966 data-nosnippet>1966</a> |
| <a href=#1967 id=1967 data-nosnippet>1967</a> <span class="doccomment">/// Comment copied from rustc: |
| <a href=#1968 id=1968 data-nosnippet>1968</a> /// Disregard "castable to" expectations because they |
| <a href=#1969 id=1969 data-nosnippet>1969</a> /// can lead us astray. Consider for example `if cond |
| <a href=#1970 id=1970 data-nosnippet>1970</a> /// {22} else {c} as u8` -- if we propagate the |
| <a href=#1971 id=1971 data-nosnippet>1971</a> /// "castable to u8" constraint to 22, it will pick the |
| <a href=#1972 id=1972 data-nosnippet>1972</a> /// type 22u8, which is overly constrained (c might not |
| <a href=#1973 id=1973 data-nosnippet>1973</a> /// be a u8). In effect, the problem is that the |
| <a href=#1974 id=1974 data-nosnippet>1974</a> /// "castable to" expectation is not the tightest thing |
| <a href=#1975 id=1975 data-nosnippet>1975</a> /// we can say, so we want to drop it in this case. |
| <a href=#1976 id=1976 data-nosnippet>1976</a> /// The tightest thing we can say is "must unify with |
| <a href=#1977 id=1977 data-nosnippet>1977</a> /// else branch". Note that in the case of a "has type" |
| <a href=#1978 id=1978 data-nosnippet>1978</a> /// constraint, this limitation does not hold. |
| <a href=#1979 id=1979 data-nosnippet>1979</a> /// |
| <a href=#1980 id=1980 data-nosnippet>1980</a> /// If the expected type is just a type variable, then don't use |
| <a href=#1981 id=1981 data-nosnippet>1981</a> /// an expected type. Otherwise, we might write parts of the type |
| <a href=#1982 id=1982 data-nosnippet>1982</a> /// when checking the 'then' block which are incompatible with the |
| <a href=#1983 id=1983 data-nosnippet>1983</a> /// 'else' branch. |
| <a href=#1984 id=1984 data-nosnippet>1984</a> </span><span class="kw">fn </span>adjust_for_branches(<span class="kw-2">&</span><span class="self">self</span>, table: <span class="kw-2">&mut </span>unify::InferenceTable<<span class="lifetime">'db</span>>) -> Expectation<<span class="lifetime">'db</span>> { |
| <a href=#1985 id=1985 data-nosnippet>1985</a> <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| <a href=#1986 id=1986 data-nosnippet>1986</a> Expectation::HasType(ety) => { |
| <a href=#1987 id=1987 data-nosnippet>1987</a> <span class="kw">let </span>ety = table.structurally_resolve_type(ety); |
| <a href=#1988 id=1988 data-nosnippet>1988</a> <span class="kw">if </span>ety.is_ty_var() { Expectation::None } <span class="kw">else </span>{ Expectation::HasType(ety) } |
| <a href=#1989 id=1989 data-nosnippet>1989</a> } |
| <a href=#1990 id=1990 data-nosnippet>1990</a> Expectation::RValueLikeUnsized(ety) => Expectation::RValueLikeUnsized(ety), |
| <a href=#1991 id=1991 data-nosnippet>1991</a> <span class="kw">_ </span>=> Expectation::None, |
| <a href=#1992 id=1992 data-nosnippet>1992</a> } |
| <a href=#1993 id=1993 data-nosnippet>1993</a> } |
| <a href=#1994 id=1994 data-nosnippet>1994</a>} |
| <a href=#1995 id=1995 data-nosnippet>1995</a> |
| <a href=#1996 id=1996 data-nosnippet>1996</a><span class="attr">#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)] |
| <a href=#1997 id=1997 data-nosnippet>1997</a></span><span class="kw">enum </span>Diverges { |
| <a href=#1998 id=1998 data-nosnippet>1998</a> Maybe, |
| <a href=#1999 id=1999 data-nosnippet>1999</a> Always, |
| <a href=#2000 id=2000 data-nosnippet>2000</a>} |
| <a href=#2001 id=2001 data-nosnippet>2001</a> |
| <a href=#2002 id=2002 data-nosnippet>2002</a><span class="kw">impl </span>Diverges { |
| <a href=#2003 id=2003 data-nosnippet>2003</a> <span class="kw">fn </span>is_always(<span class="self">self</span>) -> bool { |
| <a href=#2004 id=2004 data-nosnippet>2004</a> <span class="self">self </span>== Diverges::Always |
| <a href=#2005 id=2005 data-nosnippet>2005</a> } |
| <a href=#2006 id=2006 data-nosnippet>2006</a>} |
| <a href=#2007 id=2007 data-nosnippet>2007</a> |
| <a href=#2008 id=2008 data-nosnippet>2008</a><span class="kw">impl </span>std::ops::BitAnd <span class="kw">for </span>Diverges { |
| <a href=#2009 id=2009 data-nosnippet>2009</a> <span class="kw">type </span>Output = <span class="self">Self</span>; |
| <a href=#2010 id=2010 data-nosnippet>2010</a> <span class="kw">fn </span>bitand(<span class="self">self</span>, other: <span class="self">Self</span>) -> <span class="self">Self </span>{ |
| <a href=#2011 id=2011 data-nosnippet>2011</a> std::cmp::min(<span class="self">self</span>, other) |
| <a href=#2012 id=2012 data-nosnippet>2012</a> } |
| <a href=#2013 id=2013 data-nosnippet>2013</a>} |
| <a href=#2014 id=2014 data-nosnippet>2014</a> |
| <a href=#2015 id=2015 data-nosnippet>2015</a><span class="kw">impl </span>std::ops::BitOr <span class="kw">for </span>Diverges { |
| <a href=#2016 id=2016 data-nosnippet>2016</a> <span class="kw">type </span>Output = <span class="self">Self</span>; |
| <a href=#2017 id=2017 data-nosnippet>2017</a> <span class="kw">fn </span>bitor(<span class="self">self</span>, other: <span class="self">Self</span>) -> <span class="self">Self </span>{ |
| <a href=#2018 id=2018 data-nosnippet>2018</a> std::cmp::max(<span class="self">self</span>, other) |
| <a href=#2019 id=2019 data-nosnippet>2019</a> } |
| <a href=#2020 id=2020 data-nosnippet>2020</a>} |
| <a href=#2021 id=2021 data-nosnippet>2021</a> |
| <a href=#2022 id=2022 data-nosnippet>2022</a><span class="kw">impl </span>std::ops::BitAndAssign <span class="kw">for </span>Diverges { |
| <a href=#2023 id=2023 data-nosnippet>2023</a> <span class="kw">fn </span>bitand_assign(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="self">Self</span>) { |
| <a href=#2024 id=2024 data-nosnippet>2024</a> <span class="kw-2">*</span><span class="self">self </span>= <span class="kw-2">*</span><span class="self">self </span>& other; |
| <a href=#2025 id=2025 data-nosnippet>2025</a> } |
| <a href=#2026 id=2026 data-nosnippet>2026</a>} |
| <a href=#2027 id=2027 data-nosnippet>2027</a> |
| <a href=#2028 id=2028 data-nosnippet>2028</a><span class="kw">impl </span>std::ops::BitOrAssign <span class="kw">for </span>Diverges { |
| <a href=#2029 id=2029 data-nosnippet>2029</a> <span class="kw">fn </span>bitor_assign(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="self">Self</span>) { |
| <a href=#2030 id=2030 data-nosnippet>2030</a> <span class="kw-2">*</span><span class="self">self </span>= <span class="kw-2">*</span><span class="self">self </span>| other; |
| <a href=#2031 id=2031 data-nosnippet>2031</a> } |
| <a href=#2032 id=2032 data-nosnippet>2032</a>} |
| </code></pre></div></section></main></body></html> |
