| <!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/method_resolution.rs`."><title>method_resolution.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>method_resolution.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! This module is concerned with finding methods that a given type provides. |
| <a href=#2 id=2 data-nosnippet>2</a>//! For details about how this works in rustc, see the method lookup page in the |
| <a href=#3 id=3 data-nosnippet>3</a>//! [rustc guide](https://rust-lang.github.io/rustc-guide/method-lookup.html) |
| <a href=#4 id=4 data-nosnippet>4</a>//! and the corresponding code mostly in rustc_hir_analysis/check/method/probe.rs. |
| <a href=#5 id=5 data-nosnippet>5</a> |
| <a href=#6 id=6 data-nosnippet>6</a></span><span class="kw">mod </span>confirm; |
| <a href=#7 id=7 data-nosnippet>7</a><span class="kw">mod </span>probe; |
| <a href=#8 id=8 data-nosnippet>8</a> |
| <a href=#9 id=9 data-nosnippet>9</a><span class="kw">use </span>either::Either; |
| <a href=#10 id=10 data-nosnippet>10</a><span class="kw">use </span>hir_expand::name::Name; |
| <a href=#11 id=11 data-nosnippet>11</a><span class="kw">use </span>span::Edition; |
| <a href=#12 id=12 data-nosnippet>12</a><span class="kw">use </span>tracing::{debug, instrument}; |
| <a href=#13 id=13 data-nosnippet>13</a> |
| <a href=#14 id=14 data-nosnippet>14</a><span class="kw">use </span>base_db::Crate; |
| <a href=#15 id=15 data-nosnippet>15</a><span class="kw">use </span>hir_def::{ |
| <a href=#16 id=16 data-nosnippet>16</a> AssocItemId, BlockId, BuiltinDeriveImplId, ConstId, FunctionId, GenericParamId, HasModule, |
| <a href=#17 id=17 data-nosnippet>17</a> ImplId, ItemContainerId, ModuleId, TraitId, |
| <a href=#18 id=18 data-nosnippet>18</a> attrs::AttrFlags, |
| <a href=#19 id=19 data-nosnippet>19</a> builtin_derive::BuiltinDeriveImplMethod, |
| <a href=#20 id=20 data-nosnippet>20</a> expr_store::path::GenericArgs <span class="kw">as </span>HirGenericArgs, |
| <a href=#21 id=21 data-nosnippet>21</a> hir::ExprId, |
| <a href=#22 id=22 data-nosnippet>22</a> lang_item::LangItems, |
| <a href=#23 id=23 data-nosnippet>23</a> nameres::{DefMap, block_def_map, crate_def_map}, |
| <a href=#24 id=24 data-nosnippet>24</a> resolver::Resolver, |
| <a href=#25 id=25 data-nosnippet>25</a>}; |
| <a href=#26 id=26 data-nosnippet>26</a><span class="kw">use </span>intern::{Symbol, sym}; |
| <a href=#27 id=27 data-nosnippet>27</a><span class="kw">use </span>rustc_hash::{FxHashMap, FxHashSet}; |
| <a href=#28 id=28 data-nosnippet>28</a><span class="kw">use </span>rustc_type_ir::{ |
| <a href=#29 id=29 data-nosnippet>29</a> TypeVisitableExt, |
| <a href=#30 id=30 data-nosnippet>30</a> fast_reject::{TreatParams, simplify_type}, |
| <a href=#31 id=31 data-nosnippet>31</a> inherent::{BoundExistentialPredicates, IntoKind}, |
| <a href=#32 id=32 data-nosnippet>32</a>}; |
| <a href=#33 id=33 data-nosnippet>33</a><span class="kw">use </span>stdx::impl_from; |
| <a href=#34 id=34 data-nosnippet>34</a><span class="kw">use </span>triomphe::Arc; |
| <a href=#35 id=35 data-nosnippet>35</a> |
| <a href=#36 id=36 data-nosnippet>36</a><span class="kw">use </span>crate::{ |
| <a href=#37 id=37 data-nosnippet>37</a> all_super_traits, |
| <a href=#38 id=38 data-nosnippet>38</a> db::HirDatabase, |
| <a href=#39 id=39 data-nosnippet>39</a> infer::{InferenceContext, unify::InferenceTable}, |
| <a href=#40 id=40 data-nosnippet>40</a> lower::GenericPredicates, |
| <a href=#41 id=41 data-nosnippet>41</a> next_solver::{ |
| <a href=#42 id=42 data-nosnippet>42</a> AnyImplId, Binder, ClauseKind, DbInterner, FnSig, GenericArgs, ParamEnv, PredicateKind, |
| <a href=#43 id=43 data-nosnippet>43</a> SimplifiedType, SolverDefId, TraitRef, Ty, TyKind, TypingMode, |
| <a href=#44 id=44 data-nosnippet>44</a> infer::{ |
| <a href=#45 id=45 data-nosnippet>45</a> BoundRegionConversionTime, DbInternerInferExt, InferCtxt, InferOk, |
| <a href=#46 id=46 data-nosnippet>46</a> select::ImplSource, |
| <a href=#47 id=47 data-nosnippet>47</a> traits::{Obligation, ObligationCause, PredicateObligations}, |
| <a href=#48 id=48 data-nosnippet>48</a> }, |
| <a href=#49 id=49 data-nosnippet>49</a> obligation_ctxt::ObligationCtxt, |
| <a href=#50 id=50 data-nosnippet>50</a> util::clauses_as_obligations, |
| <a href=#51 id=51 data-nosnippet>51</a> }, |
| <a href=#52 id=52 data-nosnippet>52</a> traits::ParamEnvAndCrate, |
| <a href=#53 id=53 data-nosnippet>53</a>}; |
| <a href=#54 id=54 data-nosnippet>54</a> |
| <a href=#55 id=55 data-nosnippet>55</a><span class="kw">pub use </span><span class="self">self</span>::probe::{ |
| <a href=#56 id=56 data-nosnippet>56</a> Candidate, CandidateKind, CandidateStep, CandidateWithPrivate, Mode, Pick, PickKind, |
| <a href=#57 id=57 data-nosnippet>57</a>}; |
| <a href=#58 id=58 data-nosnippet>58</a> |
| <a href=#59 id=59 data-nosnippet>59</a><span class="attr">#[derive(Debug, Clone)] |
| <a href=#60 id=60 data-nosnippet>60</a></span><span class="kw">pub struct </span>MethodResolutionUnstableFeatures { |
| <a href=#61 id=61 data-nosnippet>61</a> arbitrary_self_types: bool, |
| <a href=#62 id=62 data-nosnippet>62</a> arbitrary_self_types_pointers: bool, |
| <a href=#63 id=63 data-nosnippet>63</a> supertrait_item_shadowing: bool, |
| <a href=#64 id=64 data-nosnippet>64</a>} |
| <a href=#65 id=65 data-nosnippet>65</a> |
| <a href=#66 id=66 data-nosnippet>66</a><span class="kw">impl </span>MethodResolutionUnstableFeatures { |
| <a href=#67 id=67 data-nosnippet>67</a> <span class="kw">pub fn </span>from_def_map(def_map: <span class="kw-2">&</span>DefMap) -> <span class="self">Self </span>{ |
| <a href=#68 id=68 data-nosnippet>68</a> <span class="self">Self </span>{ |
| <a href=#69 id=69 data-nosnippet>69</a> arbitrary_self_types: def_map.is_unstable_feature_enabled(<span class="kw-2">&</span>sym::arbitrary_self_types), |
| <a href=#70 id=70 data-nosnippet>70</a> arbitrary_self_types_pointers: def_map |
| <a href=#71 id=71 data-nosnippet>71</a> .is_unstable_feature_enabled(<span class="kw-2">&</span>sym::arbitrary_self_types_pointers), |
| <a href=#72 id=72 data-nosnippet>72</a> supertrait_item_shadowing: def_map |
| <a href=#73 id=73 data-nosnippet>73</a> .is_unstable_feature_enabled(<span class="kw-2">&</span>sym::supertrait_item_shadowing), |
| <a href=#74 id=74 data-nosnippet>74</a> } |
| <a href=#75 id=75 data-nosnippet>75</a> } |
| <a href=#76 id=76 data-nosnippet>76</a>} |
| <a href=#77 id=77 data-nosnippet>77</a> |
| <a href=#78 id=78 data-nosnippet>78</a><span class="kw">pub struct </span>MethodResolutionContext<<span class="lifetime">'a</span>, <span class="lifetime">'db</span>> { |
| <a href=#79 id=79 data-nosnippet>79</a> <span class="kw">pub </span>infcx: <span class="kw-2">&</span><span class="lifetime">'a </span>InferCtxt<<span class="lifetime">'db</span>>, |
| <a href=#80 id=80 data-nosnippet>80</a> <span class="kw">pub </span>resolver: <span class="kw-2">&</span><span class="lifetime">'a </span>Resolver<<span class="lifetime">'db</span>>, |
| <a href=#81 id=81 data-nosnippet>81</a> <span class="kw">pub </span>param_env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#82 id=82 data-nosnippet>82</a> <span class="kw">pub </span>traits_in_scope: <span class="kw-2">&</span><span class="lifetime">'a </span>FxHashSet<TraitId>, |
| <a href=#83 id=83 data-nosnippet>83</a> <span class="kw">pub </span>edition: Edition, |
| <a href=#84 id=84 data-nosnippet>84</a> <span class="kw">pub </span>unstable_features: <span class="kw-2">&</span><span class="lifetime">'a </span>MethodResolutionUnstableFeatures, |
| <a href=#85 id=85 data-nosnippet>85</a>} |
| <a href=#86 id=86 data-nosnippet>86</a> |
| <a href=#87 id=87 data-nosnippet>87</a><span class="attr">#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, salsa::Update)] |
| <a href=#88 id=88 data-nosnippet>88</a></span><span class="kw">pub enum </span>CandidateId { |
| <a href=#89 id=89 data-nosnippet>89</a> FunctionId(FunctionId), |
| <a href=#90 id=90 data-nosnippet>90</a> ConstId(ConstId), |
| <a href=#91 id=91 data-nosnippet>91</a>} |
| <a href=#92 id=92 data-nosnippet>92</a><span class="macro">impl_from!</span>(FunctionId, ConstId <span class="kw">for </span>CandidateId); |
| <a href=#93 id=93 data-nosnippet>93</a> |
| <a href=#94 id=94 data-nosnippet>94</a><span class="kw">impl </span>CandidateId { |
| <a href=#95 id=95 data-nosnippet>95</a> <span class="kw">fn </span>container(<span class="self">self</span>, db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase) -> ItemContainerId { |
| <a href=#96 id=96 data-nosnippet>96</a> <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#97 id=97 data-nosnippet>97</a> CandidateId::FunctionId(id) => id.loc(db).container, |
| <a href=#98 id=98 data-nosnippet>98</a> CandidateId::ConstId(id) => id.loc(db).container, |
| <a href=#99 id=99 data-nosnippet>99</a> } |
| <a href=#100 id=100 data-nosnippet>100</a> } |
| <a href=#101 id=101 data-nosnippet>101</a>} |
| <a href=#102 id=102 data-nosnippet>102</a> |
| <a href=#103 id=103 data-nosnippet>103</a><span class="attr">#[derive(Clone, Copy, Debug)] |
| <a href=#104 id=104 data-nosnippet>104</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>MethodCallee<<span class="lifetime">'db</span>> { |
| <a href=#105 id=105 data-nosnippet>105</a> <span class="doccomment">/// Impl method ID, for inherent methods, or trait method ID, otherwise. |
| <a href=#106 id=106 data-nosnippet>106</a> </span><span class="kw">pub </span>def_id: FunctionId, |
| <a href=#107 id=107 data-nosnippet>107</a> <span class="kw">pub </span>args: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#108 id=108 data-nosnippet>108</a> |
| <a href=#109 id=109 data-nosnippet>109</a> <span class="doccomment">/// Instantiated method signature, i.e., it has been |
| <a href=#110 id=110 data-nosnippet>110</a> /// instantiated, normalized, and has had late-bound |
| <a href=#111 id=111 data-nosnippet>111</a> /// lifetimes replaced with inference variables. |
| <a href=#112 id=112 data-nosnippet>112</a> </span><span class="kw">pub </span>sig: FnSig<<span class="lifetime">'db</span>>, |
| <a href=#113 id=113 data-nosnippet>113</a>} |
| <a href=#114 id=114 data-nosnippet>114</a> |
| <a href=#115 id=115 data-nosnippet>115</a><span class="attr">#[derive(Debug)] |
| <a href=#116 id=116 data-nosnippet>116</a></span><span class="kw">pub enum </span>MethodError<<span class="lifetime">'db</span>> { |
| <a href=#117 id=117 data-nosnippet>117</a> <span class="doccomment">/// Did not find an applicable method. |
| <a href=#118 id=118 data-nosnippet>118</a> </span>NoMatch, |
| <a href=#119 id=119 data-nosnippet>119</a> |
| <a href=#120 id=120 data-nosnippet>120</a> <span class="doccomment">/// Multiple methods might apply. |
| <a href=#121 id=121 data-nosnippet>121</a> </span>Ambiguity(Vec<CandidateSource>), |
| <a href=#122 id=122 data-nosnippet>122</a> |
| <a href=#123 id=123 data-nosnippet>123</a> <span class="doccomment">/// Found an applicable method, but it is not visible. |
| <a href=#124 id=124 data-nosnippet>124</a> </span>PrivateMatch(Pick<<span class="lifetime">'db</span>>), |
| <a href=#125 id=125 data-nosnippet>125</a> |
| <a href=#126 id=126 data-nosnippet>126</a> <span class="doccomment">/// Found a `Self: Sized` bound where `Self` is a trait object. |
| <a href=#127 id=127 data-nosnippet>127</a> </span>IllegalSizedBound { candidates: Vec<FunctionId>, needs_mut: bool }, |
| <a href=#128 id=128 data-nosnippet>128</a> |
| <a href=#129 id=129 data-nosnippet>129</a> <span class="doccomment">/// Error has already been emitted, no need to emit another one. |
| <a href=#130 id=130 data-nosnippet>130</a> </span>ErrorReported, |
| <a href=#131 id=131 data-nosnippet>131</a>} |
| <a href=#132 id=132 data-nosnippet>132</a> |
| <a href=#133 id=133 data-nosnippet>133</a><span class="comment">// A pared down enum describing just the places from which a method |
| <a href=#134 id=134 data-nosnippet>134</a>// candidate can arise. Used for error reporting only. |
| <a href=#135 id=135 data-nosnippet>135</a></span><span class="attr">#[derive(Copy, Clone, Debug, Eq, PartialEq)] |
| <a href=#136 id=136 data-nosnippet>136</a></span><span class="kw">pub enum </span>CandidateSource { |
| <a href=#137 id=137 data-nosnippet>137</a> Impl(AnyImplId), |
| <a href=#138 id=138 data-nosnippet>138</a> Trait(TraitId), |
| <a href=#139 id=139 data-nosnippet>139</a>} |
| <a href=#140 id=140 data-nosnippet>140</a> |
| <a href=#141 id=141 data-nosnippet>141</a><span class="kw">impl</span><<span class="lifetime">'a</span>, <span class="lifetime">'db</span>> InferenceContext<<span class="lifetime">'a</span>, <span class="lifetime">'db</span>> { |
| <a href=#142 id=142 data-nosnippet>142</a> <span class="doccomment">/// Performs method lookup. If lookup is successful, it will return the callee |
| <a href=#143 id=143 data-nosnippet>143</a> /// and store an appropriate adjustment for the self-expr. In some cases it may |
| <a href=#144 id=144 data-nosnippet>144</a> /// report an error (e.g., invoking the `drop` method). |
| <a href=#145 id=145 data-nosnippet>145</a> </span><span class="attr">#[instrument(level = <span class="string">"debug"</span>, skip(<span class="self">self</span>))] |
| <a href=#146 id=146 data-nosnippet>146</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>lookup_method_including_private( |
| <a href=#147 id=147 data-nosnippet>147</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#148 id=148 data-nosnippet>148</a> self_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#149 id=149 data-nosnippet>149</a> name: Name, |
| <a href=#150 id=150 data-nosnippet>150</a> generic_args: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>HirGenericArgs>, |
| <a href=#151 id=151 data-nosnippet>151</a> receiver: ExprId, |
| <a href=#152 id=152 data-nosnippet>152</a> call_expr: ExprId, |
| <a href=#153 id=153 data-nosnippet>153</a> ) -> <span class="prelude-ty">Result</span><(MethodCallee<<span class="lifetime">'db</span>>, bool), MethodError<<span class="lifetime">'db</span>>> { |
| <a href=#154 id=154 data-nosnippet>154</a> <span class="kw">let </span>(pick, is_visible) = <span class="kw">match </span><span class="self">self</span>.lookup_probe(name, self_ty) { |
| <a href=#155 id=155 data-nosnippet>155</a> <span class="prelude-val">Ok</span>(it) => (it, <span class="bool-val">true</span>), |
| <a href=#156 id=156 data-nosnippet>156</a> <span class="prelude-val">Err</span>(MethodError::PrivateMatch(it)) => { |
| <a href=#157 id=157 data-nosnippet>157</a> <span class="comment">// FIXME: Report error. |
| <a href=#158 id=158 data-nosnippet>158</a> </span>(it, <span class="bool-val">false</span>) |
| <a href=#159 id=159 data-nosnippet>159</a> } |
| <a href=#160 id=160 data-nosnippet>160</a> <span class="prelude-val">Err</span>(err) => <span class="kw">return </span><span class="prelude-val">Err</span>(err), |
| <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> <span class="kw">let </span>result = <span class="self">self</span>.confirm_method(<span class="kw-2">&</span>pick, self_ty, call_expr, generic_args); |
| <a href=#164 id=164 data-nosnippet>164</a> <span class="macro">debug!</span>(<span class="string">"result = {:?}"</span>, result); |
| <a href=#165 id=165 data-nosnippet>165</a> |
| <a href=#166 id=166 data-nosnippet>166</a> <span class="kw">if </span>result.illegal_sized_bound { |
| <a href=#167 id=167 data-nosnippet>167</a> <span class="comment">// FIXME: Report an error. |
| <a href=#168 id=168 data-nosnippet>168</a> </span>} |
| <a href=#169 id=169 data-nosnippet>169</a> |
| <a href=#170 id=170 data-nosnippet>170</a> <span class="self">self</span>.write_expr_adj(receiver, result.adjustments); |
| <a href=#171 id=171 data-nosnippet>171</a> <span class="self">self</span>.write_method_resolution(call_expr, result.callee.def_id, result.callee.args); |
| <a href=#172 id=172 data-nosnippet>172</a> |
| <a href=#173 id=173 data-nosnippet>173</a> <span class="prelude-val">Ok</span>((result.callee, is_visible)) |
| <a href=#174 id=174 data-nosnippet>174</a> } |
| <a href=#175 id=175 data-nosnippet>175</a> |
| <a href=#176 id=176 data-nosnippet>176</a> <span class="attr">#[instrument(level = <span class="string">"debug"</span>, skip(<span class="self">self</span>))] |
| <a href=#177 id=177 data-nosnippet>177</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>lookup_probe( |
| <a href=#178 id=178 data-nosnippet>178</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#179 id=179 data-nosnippet>179</a> method_name: Name, |
| <a href=#180 id=180 data-nosnippet>180</a> self_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#181 id=181 data-nosnippet>181</a> ) -> probe::PickResult<<span class="lifetime">'db</span>> { |
| <a href=#182 id=182 data-nosnippet>182</a> <span class="self">self</span>.with_method_resolution(|ctx| { |
| <a href=#183 id=183 data-nosnippet>183</a> <span class="kw">let </span>pick = ctx.probe_for_name(probe::Mode::MethodCall, method_name, self_ty)<span class="question-mark">?</span>; |
| <a href=#184 id=184 data-nosnippet>184</a> <span class="prelude-val">Ok</span>(pick) |
| <a href=#185 id=185 data-nosnippet>185</a> }) |
| <a href=#186 id=186 data-nosnippet>186</a> } |
| <a href=#187 id=187 data-nosnippet>187</a> |
| <a href=#188 id=188 data-nosnippet>188</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>with_method_resolution<R>( |
| <a href=#189 id=189 data-nosnippet>189</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#190 id=190 data-nosnippet>190</a> f: <span class="kw">impl </span>FnOnce(<span class="kw-2">&</span>MethodResolutionContext<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>) -> R, |
| <a href=#191 id=191 data-nosnippet>191</a> ) -> R { |
| <a href=#192 id=192 data-nosnippet>192</a> <span class="kw">let </span>traits_in_scope = <span class="self">self</span>.get_traits_in_scope(); |
| <a href=#193 id=193 data-nosnippet>193</a> <span class="kw">let </span>traits_in_scope = <span class="kw">match </span><span class="kw-2">&</span>traits_in_scope { |
| <a href=#194 id=194 data-nosnippet>194</a> Either::Left(it) => it, |
| <a href=#195 id=195 data-nosnippet>195</a> Either::Right(it) => <span class="kw-2">*</span>it, |
| <a href=#196 id=196 data-nosnippet>196</a> }; |
| <a href=#197 id=197 data-nosnippet>197</a> <span class="kw">let </span>ctx = MethodResolutionContext { |
| <a href=#198 id=198 data-nosnippet>198</a> infcx: <span class="kw-2">&</span><span class="self">self</span>.table.infer_ctxt, |
| <a href=#199 id=199 data-nosnippet>199</a> resolver: <span class="kw-2">&</span><span class="self">self</span>.resolver, |
| <a href=#200 id=200 data-nosnippet>200</a> param_env: <span class="self">self</span>.table.param_env, |
| <a href=#201 id=201 data-nosnippet>201</a> traits_in_scope, |
| <a href=#202 id=202 data-nosnippet>202</a> edition: <span class="self">self</span>.edition, |
| <a href=#203 id=203 data-nosnippet>203</a> unstable_features: <span class="kw-2">&</span><span class="self">self</span>.unstable_features, |
| <a href=#204 id=204 data-nosnippet>204</a> }; |
| <a href=#205 id=205 data-nosnippet>205</a> f(<span class="kw-2">&</span>ctx) |
| <a href=#206 id=206 data-nosnippet>206</a> } |
| <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="doccomment">/// Used by `FnCtxt::lookup_method_for_operator` with `-Znext-solver`. |
| <a href=#210 id=210 data-nosnippet>210</a>/// |
| <a href=#211 id=211 data-nosnippet>211</a>/// With `AsRigid` we error on `impl Opaque: NotInItemBounds` while |
| <a href=#212 id=212 data-nosnippet>212</a>/// `AsInfer` just treats it as ambiguous and succeeds. This is necessary |
| <a href=#213 id=213 data-nosnippet>213</a>/// as we want `FnCtxt::check_expr_call` to treat not-yet-defined opaque |
| <a href=#214 id=214 data-nosnippet>214</a>/// types as rigid to support `impl Deref<Target = impl FnOnce()>` and |
| <a href=#215 id=215 data-nosnippet>215</a>/// `Box<impl FnOnce()>`. |
| <a href=#216 id=216 data-nosnippet>216</a>/// |
| <a href=#217 id=217 data-nosnippet>217</a>/// We only want to treat opaque types as rigid if we need to eagerly choose |
| <a href=#218 id=218 data-nosnippet>218</a>/// between multiple candidates. We otherwise treat them as ordinary inference |
| <a href=#219 id=219 data-nosnippet>219</a>/// variable to avoid rejecting otherwise correct code. |
| <a href=#220 id=220 data-nosnippet>220</a></span><span class="attr">#[derive(Debug)] |
| <a href=#221 id=221 data-nosnippet>221</a>#[expect(dead_code)] |
| <a href=#222 id=222 data-nosnippet>222</a></span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">enum </span>TreatNotYetDefinedOpaques { |
| <a href=#223 id=223 data-nosnippet>223</a> AsInfer, |
| <a href=#224 id=224 data-nosnippet>224</a> AsRigid, |
| <a href=#225 id=225 data-nosnippet>225</a>} |
| <a href=#226 id=226 data-nosnippet>226</a> |
| <a href=#227 id=227 data-nosnippet>227</a><span class="kw">impl</span><<span class="lifetime">'db</span>> InferenceTable<<span class="lifetime">'db</span>> { |
| <a href=#228 id=228 data-nosnippet>228</a> <span class="doccomment">/// `lookup_method_in_trait` is used for overloaded operators. |
| <a href=#229 id=229 data-nosnippet>229</a> /// It does a very narrow slice of what the normal probe/confirm path does. |
| <a href=#230 id=230 data-nosnippet>230</a> /// In particular, it doesn't really do any probing: it simply constructs |
| <a href=#231 id=231 data-nosnippet>231</a> /// an obligation for a particular trait with the given self type and checks |
| <a href=#232 id=232 data-nosnippet>232</a> /// whether that trait is implemented. |
| <a href=#233 id=233 data-nosnippet>233</a> </span><span class="attr">#[instrument(level = <span class="string">"debug"</span>, skip(<span class="self">self</span>))] |
| <a href=#234 id=234 data-nosnippet>234</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>lookup_method_for_operator( |
| <a href=#235 id=235 data-nosnippet>235</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#236 id=236 data-nosnippet>236</a> cause: ObligationCause, |
| <a href=#237 id=237 data-nosnippet>237</a> method_name: Symbol, |
| <a href=#238 id=238 data-nosnippet>238</a> trait_def_id: TraitId, |
| <a href=#239 id=239 data-nosnippet>239</a> self_ty: Ty<<span class="lifetime">'db</span>>, |
| <a href=#240 id=240 data-nosnippet>240</a> opt_rhs_ty: <span class="prelude-ty">Option</span><Ty<<span class="lifetime">'db</span>>>, |
| <a href=#241 id=241 data-nosnippet>241</a> treat_opaques: TreatNotYetDefinedOpaques, |
| <a href=#242 id=242 data-nosnippet>242</a> ) -> <span class="prelude-ty">Option</span><InferOk<<span class="lifetime">'db</span>, MethodCallee<<span class="lifetime">'db</span>>>> { |
| <a href=#243 id=243 data-nosnippet>243</a> <span class="comment">// Construct a trait-reference `self_ty : Trait<input_tys>` |
| <a href=#244 id=244 data-nosnippet>244</a> </span><span class="kw">let </span>args = GenericArgs::for_item( |
| <a href=#245 id=245 data-nosnippet>245</a> <span class="self">self</span>.interner(), |
| <a href=#246 id=246 data-nosnippet>246</a> trait_def_id.into(), |
| <a href=#247 id=247 data-nosnippet>247</a> |param_idx, param_id, <span class="kw">_</span>| <span class="kw">match </span>param_id { |
| <a href=#248 id=248 data-nosnippet>248</a> GenericParamId::LifetimeParamId(<span class="kw">_</span>) | GenericParamId::ConstParamId(<span class="kw">_</span>) => { |
| <a href=#249 id=249 data-nosnippet>249</a> <span class="macro">unreachable!</span>(<span class="string">"did not expect operator trait to have lifetime/const"</span>) |
| <a href=#250 id=250 data-nosnippet>250</a> } |
| <a href=#251 id=251 data-nosnippet>251</a> GenericParamId::TypeParamId(<span class="kw">_</span>) => { |
| <a href=#252 id=252 data-nosnippet>252</a> <span class="kw">if </span>param_idx == <span class="number">0 </span>{ |
| <a href=#253 id=253 data-nosnippet>253</a> self_ty.into() |
| <a href=#254 id=254 data-nosnippet>254</a> } <span class="kw">else if let </span><span class="prelude-val">Some</span>(rhs_ty) = opt_rhs_ty { |
| <a href=#255 id=255 data-nosnippet>255</a> <span class="macro">assert_eq!</span>(param_idx, <span class="number">1</span>, <span class="string">"did not expect >1 param on operator trait"</span>); |
| <a href=#256 id=256 data-nosnippet>256</a> rhs_ty.into() |
| <a href=#257 id=257 data-nosnippet>257</a> } <span class="kw">else </span>{ |
| <a href=#258 id=258 data-nosnippet>258</a> <span class="comment">// FIXME: We should stop passing `None` for the failure case |
| <a href=#259 id=259 data-nosnippet>259</a> // when probing for call exprs. I.e. `opt_rhs_ty` should always |
| <a href=#260 id=260 data-nosnippet>260</a> // be set when it needs to be. |
| <a href=#261 id=261 data-nosnippet>261</a> </span><span class="self">self</span>.next_var_for_param(param_id) |
| <a href=#262 id=262 data-nosnippet>262</a> } |
| <a href=#263 id=263 data-nosnippet>263</a> } |
| <a href=#264 id=264 data-nosnippet>264</a> }, |
| <a href=#265 id=265 data-nosnippet>265</a> ); |
| <a href=#266 id=266 data-nosnippet>266</a> |
| <a href=#267 id=267 data-nosnippet>267</a> <span class="kw">let </span>obligation = Obligation::new( |
| <a href=#268 id=268 data-nosnippet>268</a> <span class="self">self</span>.interner(), |
| <a href=#269 id=269 data-nosnippet>269</a> cause, |
| <a href=#270 id=270 data-nosnippet>270</a> <span class="self">self</span>.param_env, |
| <a href=#271 id=271 data-nosnippet>271</a> TraitRef::new_from_args(<span class="self">self</span>.interner(), trait_def_id.into(), args), |
| <a href=#272 id=272 data-nosnippet>272</a> ); |
| <a href=#273 id=273 data-nosnippet>273</a> |
| <a href=#274 id=274 data-nosnippet>274</a> <span class="comment">// Now we want to know if this can be matched |
| <a href=#275 id=275 data-nosnippet>275</a> </span><span class="kw">let </span>matches_trait = <span class="kw">match </span>treat_opaques { |
| <a href=#276 id=276 data-nosnippet>276</a> TreatNotYetDefinedOpaques::AsInfer => <span class="self">self</span>.infer_ctxt.predicate_may_hold(<span class="kw-2">&</span>obligation), |
| <a href=#277 id=277 data-nosnippet>277</a> TreatNotYetDefinedOpaques::AsRigid => { |
| <a href=#278 id=278 data-nosnippet>278</a> <span class="self">self</span>.infer_ctxt.predicate_may_hold_opaque_types_jank(<span class="kw-2">&</span>obligation) |
| <a href=#279 id=279 data-nosnippet>279</a> } |
| <a href=#280 id=280 data-nosnippet>280</a> }; |
| <a href=#281 id=281 data-nosnippet>281</a> |
| <a href=#282 id=282 data-nosnippet>282</a> <span class="kw">if </span>!matches_trait { |
| <a href=#283 id=283 data-nosnippet>283</a> <span class="macro">debug!</span>(<span class="string">"--> Cannot match obligation"</span>); |
| <a href=#284 id=284 data-nosnippet>284</a> <span class="comment">// Cannot be matched, no such method resolution is possible. |
| <a href=#285 id=285 data-nosnippet>285</a> </span><span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#286 id=286 data-nosnippet>286</a> } |
| <a href=#287 id=287 data-nosnippet>287</a> |
| <a href=#288 id=288 data-nosnippet>288</a> <span class="comment">// Trait must have a method named `m_name` and it should not have |
| <a href=#289 id=289 data-nosnippet>289</a> // type parameters or early-bound regions. |
| <a href=#290 id=290 data-nosnippet>290</a> </span><span class="kw">let </span>interner = <span class="self">self</span>.interner(); |
| <a href=#291 id=291 data-nosnippet>291</a> <span class="comment">// We use `Ident::with_dummy_span` since no built-in operator methods have |
| <a href=#292 id=292 data-nosnippet>292</a> // any macro-specific hygiene, so the span's context doesn't really matter. |
| <a href=#293 id=293 data-nosnippet>293</a> </span><span class="kw">let </span><span class="prelude-val">Some</span>(method_item) = |
| <a href=#294 id=294 data-nosnippet>294</a> trait_def_id.trait_items(<span class="self">self</span>.db).method_by_name(<span class="kw-2">&</span>Name::new_symbol_root(method_name)) |
| <a href=#295 id=295 data-nosnippet>295</a> <span class="kw">else </span>{ |
| <a href=#296 id=296 data-nosnippet>296</a> <span class="macro">panic!</span>(<span class="string">"expected associated item for operator trait"</span>) |
| <a href=#297 id=297 data-nosnippet>297</a> }; |
| <a href=#298 id=298 data-nosnippet>298</a> |
| <a href=#299 id=299 data-nosnippet>299</a> <span class="kw">let </span>def_id = method_item; |
| <a href=#300 id=300 data-nosnippet>300</a> |
| <a href=#301 id=301 data-nosnippet>301</a> <span class="macro">debug!</span>(<span class="string">"lookup_in_trait_adjusted: method_item={:?}"</span>, method_item); |
| <a href=#302 id=302 data-nosnippet>302</a> <span class="kw">let </span><span class="kw-2">mut </span>obligations = PredicateObligations::new(); |
| <a href=#303 id=303 data-nosnippet>303</a> |
| <a href=#304 id=304 data-nosnippet>304</a> <span class="comment">// Instantiate late-bound regions and instantiate the trait |
| <a href=#305 id=305 data-nosnippet>305</a> // parameters into the method type to get the actual method type. |
| <a href=#306 id=306 data-nosnippet>306</a> // |
| <a href=#307 id=307 data-nosnippet>307</a> // N.B., instantiate late-bound regions before normalizing the |
| <a href=#308 id=308 data-nosnippet>308</a> // function signature so that normalization does not need to deal |
| <a href=#309 id=309 data-nosnippet>309</a> // with bound regions. |
| <a href=#310 id=310 data-nosnippet>310</a> </span><span class="kw">let </span>fn_sig = |
| <a href=#311 id=311 data-nosnippet>311</a> <span class="self">self</span>.db.callable_item_signature(method_item.into()).instantiate(interner, args); |
| <a href=#312 id=312 data-nosnippet>312</a> <span class="kw">let </span>fn_sig = <span class="self">self |
| <a href=#313 id=313 data-nosnippet>313</a> </span>.infer_ctxt |
| <a href=#314 id=314 data-nosnippet>314</a> .instantiate_binder_with_fresh_vars(BoundRegionConversionTime::FnCall, fn_sig); |
| <a href=#315 id=315 data-nosnippet>315</a> |
| <a href=#316 id=316 data-nosnippet>316</a> <span class="comment">// Register obligations for the parameters. This will include the |
| <a href=#317 id=317 data-nosnippet>317</a> // `Self` parameter, which in turn has a bound of the main trait, |
| <a href=#318 id=318 data-nosnippet>318</a> // so this also effectively registers `obligation` as well. (We |
| <a href=#319 id=319 data-nosnippet>319</a> // used to register `obligation` explicitly, but that resulted in |
| <a href=#320 id=320 data-nosnippet>320</a> // double error messages being reported.) |
| <a href=#321 id=321 data-nosnippet>321</a> // |
| <a href=#322 id=322 data-nosnippet>322</a> // Note that as the method comes from a trait, it should not have |
| <a href=#323 id=323 data-nosnippet>323</a> // any late-bound regions appearing in its bounds. |
| <a href=#324 id=324 data-nosnippet>324</a> </span><span class="kw">let </span>bounds = GenericPredicates::query_all(<span class="self">self</span>.db, method_item.into()); |
| <a href=#325 id=325 data-nosnippet>325</a> <span class="kw">let </span>bounds = clauses_as_obligations( |
| <a href=#326 id=326 data-nosnippet>326</a> bounds.iter_instantiated_copied(interner, args.as_slice()), |
| <a href=#327 id=327 data-nosnippet>327</a> ObligationCause::new(), |
| <a href=#328 id=328 data-nosnippet>328</a> <span class="self">self</span>.param_env, |
| <a href=#329 id=329 data-nosnippet>329</a> ); |
| <a href=#330 id=330 data-nosnippet>330</a> |
| <a href=#331 id=331 data-nosnippet>331</a> obligations.extend(bounds); |
| <a href=#332 id=332 data-nosnippet>332</a> |
| <a href=#333 id=333 data-nosnippet>333</a> <span class="comment">// Also add an obligation for the method type being well-formed. |
| <a href=#334 id=334 data-nosnippet>334</a> </span><span class="macro">debug!</span>( |
| <a href=#335 id=335 data-nosnippet>335</a> <span class="string">"lookup_method_in_trait: matched method fn_sig={:?} obligation={:?}"</span>, |
| <a href=#336 id=336 data-nosnippet>336</a> fn_sig, obligation |
| <a href=#337 id=337 data-nosnippet>337</a> ); |
| <a href=#338 id=338 data-nosnippet>338</a> <span class="kw">for </span>ty <span class="kw">in </span>fn_sig.inputs_and_output { |
| <a href=#339 id=339 data-nosnippet>339</a> obligations.push(Obligation::new( |
| <a href=#340 id=340 data-nosnippet>340</a> interner, |
| <a href=#341 id=341 data-nosnippet>341</a> obligation.cause.clone(), |
| <a href=#342 id=342 data-nosnippet>342</a> <span class="self">self</span>.param_env, |
| <a href=#343 id=343 data-nosnippet>343</a> Binder::dummy(PredicateKind::Clause(ClauseKind::WellFormed(ty.into()))), |
| <a href=#344 id=344 data-nosnippet>344</a> )); |
| <a href=#345 id=345 data-nosnippet>345</a> } |
| <a href=#346 id=346 data-nosnippet>346</a> |
| <a href=#347 id=347 data-nosnippet>347</a> <span class="kw">let </span>callee = MethodCallee { def_id, args, sig: fn_sig }; |
| <a href=#348 id=348 data-nosnippet>348</a> <span class="macro">debug!</span>(<span class="string">"callee = {:?}"</span>, callee); |
| <a href=#349 id=349 data-nosnippet>349</a> |
| <a href=#350 id=350 data-nosnippet>350</a> <span class="prelude-val">Some</span>(InferOk { obligations, value: callee }) |
| <a href=#351 id=351 data-nosnippet>351</a> } |
| <a href=#352 id=352 data-nosnippet>352</a>} |
| <a href=#353 id=353 data-nosnippet>353</a> |
| <a href=#354 id=354 data-nosnippet>354</a><span class="kw">pub fn </span>lookup_impl_const<<span class="lifetime">'db</span>>( |
| <a href=#355 id=355 data-nosnippet>355</a> infcx: <span class="kw-2">&</span>InferCtxt<<span class="lifetime">'db</span>>, |
| <a href=#356 id=356 data-nosnippet>356</a> env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#357 id=357 data-nosnippet>357</a> const_id: ConstId, |
| <a href=#358 id=358 data-nosnippet>358</a> subs: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#359 id=359 data-nosnippet>359</a>) -> (ConstId, GenericArgs<<span class="lifetime">'db</span>>) { |
| <a href=#360 id=360 data-nosnippet>360</a> <span class="kw">let </span>interner = infcx.interner; |
| <a href=#361 id=361 data-nosnippet>361</a> <span class="kw">let </span>db = interner.db; |
| <a href=#362 id=362 data-nosnippet>362</a> |
| <a href=#363 id=363 data-nosnippet>363</a> <span class="kw">let </span>trait_id = <span class="kw">match </span>const_id.loc(db).container { |
| <a href=#364 id=364 data-nosnippet>364</a> ItemContainerId::TraitId(id) => id, |
| <a href=#365 id=365 data-nosnippet>365</a> <span class="kw">_ </span>=> <span class="kw">return </span>(const_id, subs), |
| <a href=#366 id=366 data-nosnippet>366</a> }; |
| <a href=#367 id=367 data-nosnippet>367</a> <span class="kw">let </span>trait_ref = TraitRef::new_from_args(interner, trait_id.into(), subs); |
| <a href=#368 id=368 data-nosnippet>368</a> |
| <a href=#369 id=369 data-nosnippet>369</a> <span class="kw">let </span>const_signature = db.const_signature(const_id); |
| <a href=#370 id=370 data-nosnippet>370</a> <span class="kw">let </span>name = <span class="kw">match </span>const_signature.name.as_ref() { |
| <a href=#371 id=371 data-nosnippet>371</a> <span class="prelude-val">Some</span>(name) => name, |
| <a href=#372 id=372 data-nosnippet>372</a> <span class="prelude-val">None </span>=> <span class="kw">return </span>(const_id, subs), |
| <a href=#373 id=373 data-nosnippet>373</a> }; |
| <a href=#374 id=374 data-nosnippet>374</a> |
| <a href=#375 id=375 data-nosnippet>375</a> lookup_impl_assoc_item_for_trait_ref(infcx, trait_ref, env, name) |
| <a href=#376 id=376 data-nosnippet>376</a> .and_then(|assoc| { |
| <a href=#377 id=377 data-nosnippet>377</a> <span class="kw">if let </span>(Either::Left(AssocItemId::ConstId(id)), s) = assoc { |
| <a href=#378 id=378 data-nosnippet>378</a> <span class="prelude-val">Some</span>((id, s)) |
| <a href=#379 id=379 data-nosnippet>379</a> } <span class="kw">else </span>{ |
| <a href=#380 id=380 data-nosnippet>380</a> <span class="prelude-val">None |
| <a href=#381 id=381 data-nosnippet>381</a> </span>} |
| <a href=#382 id=382 data-nosnippet>382</a> }) |
| <a href=#383 id=383 data-nosnippet>383</a> .unwrap_or((const_id, subs)) |
| <a href=#384 id=384 data-nosnippet>384</a>} |
| <a href=#385 id=385 data-nosnippet>385</a> |
| <a href=#386 id=386 data-nosnippet>386</a><span class="doccomment">/// Checks if the self parameter of `Trait` method is the `dyn Trait` and we should |
| <a href=#387 id=387 data-nosnippet>387</a>/// call the method using the vtable. |
| <a href=#388 id=388 data-nosnippet>388</a></span><span class="kw">pub fn </span>is_dyn_method<<span class="lifetime">'db</span>>( |
| <a href=#389 id=389 data-nosnippet>389</a> interner: DbInterner<<span class="lifetime">'db</span>>, |
| <a href=#390 id=390 data-nosnippet>390</a> _env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#391 id=391 data-nosnippet>391</a> func: FunctionId, |
| <a href=#392 id=392 data-nosnippet>392</a> fn_subst: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#393 id=393 data-nosnippet>393</a>) -> <span class="prelude-ty">Option</span><usize> { |
| <a href=#394 id=394 data-nosnippet>394</a> <span class="kw">let </span>db = interner.db; |
| <a href=#395 id=395 data-nosnippet>395</a> |
| <a href=#396 id=396 data-nosnippet>396</a> <span class="kw">let </span>ItemContainerId::TraitId(trait_id) = func.loc(db).container <span class="kw">else </span>{ |
| <a href=#397 id=397 data-nosnippet>397</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#398 id=398 data-nosnippet>398</a> }; |
| <a href=#399 id=399 data-nosnippet>399</a> <span class="kw">let </span>trait_params = db.generic_params(trait_id.into()).len(); |
| <a href=#400 id=400 data-nosnippet>400</a> <span class="kw">let </span>fn_params = fn_subst.len() - trait_params; |
| <a href=#401 id=401 data-nosnippet>401</a> <span class="kw">let </span>trait_ref = TraitRef::new_from_args( |
| <a href=#402 id=402 data-nosnippet>402</a> interner, |
| <a href=#403 id=403 data-nosnippet>403</a> trait_id.into(), |
| <a href=#404 id=404 data-nosnippet>404</a> GenericArgs::new_from_slice(<span class="kw-2">&</span>fn_subst[..trait_params]), |
| <a href=#405 id=405 data-nosnippet>405</a> ); |
| <a href=#406 id=406 data-nosnippet>406</a> <span class="kw">let </span>self_ty = trait_ref.self_ty(); |
| <a href=#407 id=407 data-nosnippet>407</a> <span class="kw">if let </span>TyKind::Dynamic(d, <span class="kw">_</span>) = self_ty.kind() { |
| <a href=#408 id=408 data-nosnippet>408</a> <span class="comment">// rustc doesn't accept `impl Foo<2> for dyn Foo<5>`, so if the trait id is equal, no matter |
| <a href=#409 id=409 data-nosnippet>409</a> // what the generics are, we are sure that the method is come from the vtable. |
| <a href=#410 id=410 data-nosnippet>410</a> </span><span class="kw">let </span>is_my_trait_in_bounds = d |
| <a href=#411 id=411 data-nosnippet>411</a> .principal_def_id() |
| <a href=#412 id=412 data-nosnippet>412</a> .is_some_and(|trait_| all_super_traits(db, trait_.<span class="number">0</span>).contains(<span class="kw-2">&</span>trait_id)); |
| <a href=#413 id=413 data-nosnippet>413</a> <span class="kw">if </span>is_my_trait_in_bounds { |
| <a href=#414 id=414 data-nosnippet>414</a> <span class="kw">return </span><span class="prelude-val">Some</span>(fn_params); |
| <a href=#415 id=415 data-nosnippet>415</a> } |
| <a href=#416 id=416 data-nosnippet>416</a> } |
| <a href=#417 id=417 data-nosnippet>417</a> <span class="prelude-val">None |
| <a href=#418 id=418 data-nosnippet>418</a></span>} |
| <a href=#419 id=419 data-nosnippet>419</a> |
| <a href=#420 id=420 data-nosnippet>420</a><span class="doccomment">/// Looks up the impl method that actually runs for the trait method `func`. |
| <a href=#421 id=421 data-nosnippet>421</a>/// |
| <a href=#422 id=422 data-nosnippet>422</a>/// Returns `func` if it's not a method defined in a trait or the lookup failed. |
| <a href=#423 id=423 data-nosnippet>423</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>lookup_impl_method_query<<span class="lifetime">'db</span>>( |
| <a href=#424 id=424 data-nosnippet>424</a> db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, |
| <a href=#425 id=425 data-nosnippet>425</a> env: ParamEnvAndCrate<<span class="lifetime">'db</span>>, |
| <a href=#426 id=426 data-nosnippet>426</a> func: FunctionId, |
| <a href=#427 id=427 data-nosnippet>427</a> fn_subst: GenericArgs<<span class="lifetime">'db</span>>, |
| <a href=#428 id=428 data-nosnippet>428</a>) -> (Either<FunctionId, (BuiltinDeriveImplId, BuiltinDeriveImplMethod)>, GenericArgs<<span class="lifetime">'db</span>>) { |
| <a href=#429 id=429 data-nosnippet>429</a> <span class="kw">let </span>interner = DbInterner::new_with(db, env.krate); |
| <a href=#430 id=430 data-nosnippet>430</a> <span class="kw">let </span>infcx = interner.infer_ctxt().build(TypingMode::PostAnalysis); |
| <a href=#431 id=431 data-nosnippet>431</a> |
| <a href=#432 id=432 data-nosnippet>432</a> <span class="kw">let </span>ItemContainerId::TraitId(trait_id) = func.loc(db).container <span class="kw">else </span>{ |
| <a href=#433 id=433 data-nosnippet>433</a> <span class="kw">return </span>(Either::Left(func), fn_subst); |
| <a href=#434 id=434 data-nosnippet>434</a> }; |
| <a href=#435 id=435 data-nosnippet>435</a> <span class="kw">let </span>trait_params = db.generic_params(trait_id.into()).len(); |
| <a href=#436 id=436 data-nosnippet>436</a> <span class="kw">let </span>trait_ref = TraitRef::new_from_args( |
| <a href=#437 id=437 data-nosnippet>437</a> interner, |
| <a href=#438 id=438 data-nosnippet>438</a> trait_id.into(), |
| <a href=#439 id=439 data-nosnippet>439</a> GenericArgs::new_from_slice(<span class="kw-2">&</span>fn_subst[..trait_params]), |
| <a href=#440 id=440 data-nosnippet>440</a> ); |
| <a href=#441 id=441 data-nosnippet>441</a> |
| <a href=#442 id=442 data-nosnippet>442</a> <span class="kw">let </span>name = <span class="kw-2">&</span>db.function_signature(func).name; |
| <a href=#443 id=443 data-nosnippet>443</a> <span class="kw">let </span><span class="prelude-val">Some</span>((impl_fn, impl_subst)) = |
| <a href=#444 id=444 data-nosnippet>444</a> lookup_impl_assoc_item_for_trait_ref(<span class="kw-2">&</span>infcx, trait_ref, env.param_env, name).and_then( |
| <a href=#445 id=445 data-nosnippet>445</a> |(assoc, impl_args)| { |
| <a href=#446 id=446 data-nosnippet>446</a> <span class="kw">let </span>assoc = <span class="kw">match </span>assoc { |
| <a href=#447 id=447 data-nosnippet>447</a> Either::Left(AssocItemId::FunctionId(id)) => Either::Left(id), |
| <a href=#448 id=448 data-nosnippet>448</a> Either::Right(it) => Either::Right(it), |
| <a href=#449 id=449 data-nosnippet>449</a> <span class="kw">_ </span>=> <span class="kw">return </span><span class="prelude-val">None</span>, |
| <a href=#450 id=450 data-nosnippet>450</a> }; |
| <a href=#451 id=451 data-nosnippet>451</a> <span class="prelude-val">Some</span>((assoc, impl_args)) |
| <a href=#452 id=452 data-nosnippet>452</a> }, |
| <a href=#453 id=453 data-nosnippet>453</a> ) |
| <a href=#454 id=454 data-nosnippet>454</a> <span class="kw">else </span>{ |
| <a href=#455 id=455 data-nosnippet>455</a> <span class="kw">return </span>(Either::Left(func), fn_subst); |
| <a href=#456 id=456 data-nosnippet>456</a> }; |
| <a href=#457 id=457 data-nosnippet>457</a> |
| <a href=#458 id=458 data-nosnippet>458</a> ( |
| <a href=#459 id=459 data-nosnippet>459</a> impl_fn, |
| <a href=#460 id=460 data-nosnippet>460</a> GenericArgs::new_from_iter( |
| <a href=#461 id=461 data-nosnippet>461</a> interner, |
| <a href=#462 id=462 data-nosnippet>462</a> impl_subst.iter().chain(fn_subst.iter().skip(trait_params)), |
| <a href=#463 id=463 data-nosnippet>463</a> ), |
| <a href=#464 id=464 data-nosnippet>464</a> ) |
| <a href=#465 id=465 data-nosnippet>465</a>} |
| <a href=#466 id=466 data-nosnippet>466</a> |
| <a href=#467 id=467 data-nosnippet>467</a><span class="kw">fn </span>lookup_impl_assoc_item_for_trait_ref<<span class="lifetime">'db</span>>( |
| <a href=#468 id=468 data-nosnippet>468</a> infcx: <span class="kw-2">&</span>InferCtxt<<span class="lifetime">'db</span>>, |
| <a href=#469 id=469 data-nosnippet>469</a> trait_ref: TraitRef<<span class="lifetime">'db</span>>, |
| <a href=#470 id=470 data-nosnippet>470</a> env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#471 id=471 data-nosnippet>471</a> name: <span class="kw-2">&</span>Name, |
| <a href=#472 id=472 data-nosnippet>472</a>) -> <span class="prelude-ty">Option</span><(Either<AssocItemId, (BuiltinDeriveImplId, BuiltinDeriveImplMethod)>, GenericArgs<<span class="lifetime">'db</span>>)> |
| <a href=#473 id=473 data-nosnippet>473</a>{ |
| <a href=#474 id=474 data-nosnippet>474</a> <span class="kw">let </span>(impl_id, impl_subst) = find_matching_impl(infcx, env, trait_ref)<span class="question-mark">?</span>; |
| <a href=#475 id=475 data-nosnippet>475</a> <span class="kw">let </span>impl_id = <span class="kw">match </span>impl_id { |
| <a href=#476 id=476 data-nosnippet>476</a> AnyImplId::ImplId(it) => it, |
| <a href=#477 id=477 data-nosnippet>477</a> AnyImplId::BuiltinDeriveImplId(impl_) => { |
| <a href=#478 id=478 data-nosnippet>478</a> <span class="kw">return </span>impl_ |
| <a href=#479 id=479 data-nosnippet>479</a> .loc(infcx.interner.db) |
| <a href=#480 id=480 data-nosnippet>480</a> .trait_ |
| <a href=#481 id=481 data-nosnippet>481</a> .get_method(name.symbol()) |
| <a href=#482 id=482 data-nosnippet>482</a> .map(|method| (Either::Right((impl_, method)), impl_subst)); |
| <a href=#483 id=483 data-nosnippet>483</a> } |
| <a href=#484 id=484 data-nosnippet>484</a> }; |
| <a href=#485 id=485 data-nosnippet>485</a> <span class="kw">let </span>item = |
| <a href=#486 id=486 data-nosnippet>486</a> impl_id.impl_items(infcx.interner.db).items.iter().find_map(|(n, it)| <span class="kw">match </span><span class="kw-2">*</span>it { |
| <a href=#487 id=487 data-nosnippet>487</a> AssocItemId::FunctionId(f) => (n == name).then_some(AssocItemId::FunctionId(f)), |
| <a href=#488 id=488 data-nosnippet>488</a> AssocItemId::ConstId(c) => (n == name).then_some(AssocItemId::ConstId(c)), |
| <a href=#489 id=489 data-nosnippet>489</a> AssocItemId::TypeAliasId(<span class="kw">_</span>) => <span class="prelude-val">None</span>, |
| <a href=#490 id=490 data-nosnippet>490</a> })<span class="question-mark">?</span>; |
| <a href=#491 id=491 data-nosnippet>491</a> <span class="prelude-val">Some</span>((Either::Left(item), impl_subst)) |
| <a href=#492 id=492 data-nosnippet>492</a>} |
| <a href=#493 id=493 data-nosnippet>493</a> |
| <a href=#494 id=494 data-nosnippet>494</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>find_matching_impl<<span class="lifetime">'db</span>>( |
| <a href=#495 id=495 data-nosnippet>495</a> infcx: <span class="kw-2">&</span>InferCtxt<<span class="lifetime">'db</span>>, |
| <a href=#496 id=496 data-nosnippet>496</a> env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#497 id=497 data-nosnippet>497</a> trait_ref: TraitRef<<span class="lifetime">'db</span>>, |
| <a href=#498 id=498 data-nosnippet>498</a>) -> <span class="prelude-ty">Option</span><(AnyImplId, GenericArgs<<span class="lifetime">'db</span>>)> { |
| <a href=#499 id=499 data-nosnippet>499</a> <span class="kw">let </span>trait_ref = infcx.at(<span class="kw-2">&</span>ObligationCause::dummy(), env).deeply_normalize(trait_ref).ok()<span class="question-mark">?</span>; |
| <a href=#500 id=500 data-nosnippet>500</a> |
| <a href=#501 id=501 data-nosnippet>501</a> <span class="kw">let </span>obligation = Obligation::new(infcx.interner, ObligationCause::dummy(), env, trait_ref); |
| <a href=#502 id=502 data-nosnippet>502</a> |
| <a href=#503 id=503 data-nosnippet>503</a> <span class="kw">let </span>selection = infcx.select(<span class="kw-2">&</span>obligation).ok()<span class="question-mark">??</span>; |
| <a href=#504 id=504 data-nosnippet>504</a> |
| <a href=#505 id=505 data-nosnippet>505</a> <span class="comment">// Currently, we use a fulfillment context to completely resolve |
| <a href=#506 id=506 data-nosnippet>506</a> // all nested obligations. This is because they can inform the |
| <a href=#507 id=507 data-nosnippet>507</a> // inference of the impl's type parameters. |
| <a href=#508 id=508 data-nosnippet>508</a> </span><span class="kw">let </span><span class="kw-2">mut </span>ocx = ObligationCtxt::new(infcx); |
| <a href=#509 id=509 data-nosnippet>509</a> <span class="kw">let </span>impl_source = selection.map(|obligation| ocx.register_obligation(obligation)); |
| <a href=#510 id=510 data-nosnippet>510</a> |
| <a href=#511 id=511 data-nosnippet>511</a> <span class="kw">let </span>errors = ocx.evaluate_obligations_error_on_ambiguity(); |
| <a href=#512 id=512 data-nosnippet>512</a> <span class="kw">if </span>!errors.is_empty() { |
| <a href=#513 id=513 data-nosnippet>513</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#514 id=514 data-nosnippet>514</a> } |
| <a href=#515 id=515 data-nosnippet>515</a> |
| <a href=#516 id=516 data-nosnippet>516</a> <span class="kw">let </span>impl_source = infcx.resolve_vars_if_possible(impl_source); |
| <a href=#517 id=517 data-nosnippet>517</a> <span class="kw">if </span>impl_source.has_non_region_infer() { |
| <a href=#518 id=518 data-nosnippet>518</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#519 id=519 data-nosnippet>519</a> } |
| <a href=#520 id=520 data-nosnippet>520</a> |
| <a href=#521 id=521 data-nosnippet>521</a> <span class="kw">match </span>impl_source { |
| <a href=#522 id=522 data-nosnippet>522</a> ImplSource::UserDefined(impl_source) => <span class="prelude-val">Some</span>((impl_source.impl_def_id, impl_source.args)), |
| <a href=#523 id=523 data-nosnippet>523</a> ImplSource::Param(<span class="kw">_</span>) | ImplSource::Builtin(..) => <span class="prelude-val">None</span>, |
| <a href=#524 id=524 data-nosnippet>524</a> } |
| <a href=#525 id=525 data-nosnippet>525</a>} |
| <a href=#526 id=526 data-nosnippet>526</a> |
| <a href=#527 id=527 data-nosnippet>527</a><span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>))] |
| <a href=#528 id=528 data-nosnippet>528</a></span><span class="kw">fn </span>crates_containing_incoherent_inherent_impls(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, krate: Crate) -> Box<[Crate]> { |
| <a href=#529 id=529 data-nosnippet>529</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"crates_containing_incoherent_inherent_impls"</span>).entered(); |
| <a href=#530 id=530 data-nosnippet>530</a> <span class="comment">// We assume that only sysroot crates contain `#[rustc_has_incoherent_inherent_impls]` |
| <a href=#531 id=531 data-nosnippet>531</a> // impls, since this is an internal feature and only std uses it. |
| <a href=#532 id=532 data-nosnippet>532</a> </span>krate.transitive_deps(db).into_iter().filter(|krate| krate.data(db).origin.is_lang()).collect() |
| <a href=#533 id=533 data-nosnippet>533</a>} |
| <a href=#534 id=534 data-nosnippet>534</a> |
| <a href=#535 id=535 data-nosnippet>535</a><span class="kw">pub fn </span>with_incoherent_inherent_impls( |
| <a href=#536 id=536 data-nosnippet>536</a> db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, |
| <a href=#537 id=537 data-nosnippet>537</a> krate: Crate, |
| <a href=#538 id=538 data-nosnippet>538</a> self_ty: <span class="kw-2">&</span>SimplifiedType, |
| <a href=#539 id=539 data-nosnippet>539</a> <span class="kw-2">mut </span>callback: <span class="kw">impl </span>FnMut(<span class="kw-2">&</span>[ImplId]), |
| <a href=#540 id=540 data-nosnippet>540</a>) { |
| <a href=#541 id=541 data-nosnippet>541</a> <span class="kw">let </span>has_incoherent_impls = <span class="kw">match </span>self_ty.def() { |
| <a href=#542 id=542 data-nosnippet>542</a> <span class="prelude-val">Some</span>(def_id) => <span class="kw">match </span>def_id.try_into() { |
| <a href=#543 id=543 data-nosnippet>543</a> <span class="prelude-val">Ok</span>(def_id) => AttrFlags::query(db, def_id) |
| <a href=#544 id=544 data-nosnippet>544</a> .contains(AttrFlags::RUSTC_HAS_INCOHERENT_INHERENT_IMPLS), |
| <a href=#545 id=545 data-nosnippet>545</a> <span class="prelude-val">Err</span>(()) => <span class="bool-val">true</span>, |
| <a href=#546 id=546 data-nosnippet>546</a> }, |
| <a href=#547 id=547 data-nosnippet>547</a> <span class="kw">_ </span>=> <span class="bool-val">true</span>, |
| <a href=#548 id=548 data-nosnippet>548</a> }; |
| <a href=#549 id=549 data-nosnippet>549</a> <span class="kw">if </span>!has_incoherent_impls { |
| <a href=#550 id=550 data-nosnippet>550</a> <span class="kw">return</span>; |
| <a href=#551 id=551 data-nosnippet>551</a> } |
| <a href=#552 id=552 data-nosnippet>552</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"incoherent_inherent_impls"</span>).entered(); |
| <a href=#553 id=553 data-nosnippet>553</a> <span class="kw">let </span>crates = crates_containing_incoherent_inherent_impls(db, krate); |
| <a href=#554 id=554 data-nosnippet>554</a> <span class="kw">for </span><span class="kw-2">&</span>krate <span class="kw">in </span>crates { |
| <a href=#555 id=555 data-nosnippet>555</a> <span class="kw">let </span>impls = InherentImpls::for_crate(db, krate); |
| <a href=#556 id=556 data-nosnippet>556</a> callback(impls.for_self_ty(self_ty)); |
| <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">pub fn </span>simplified_type_module(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, ty: <span class="kw-2">&</span>SimplifiedType) -> <span class="prelude-ty">Option</span><ModuleId> { |
| <a href=#561 id=561 data-nosnippet>561</a> <span class="kw">match </span>ty.def()<span class="question-mark">? </span>{ |
| <a href=#562 id=562 data-nosnippet>562</a> SolverDefId::AdtId(id) => <span class="prelude-val">Some</span>(id.module(db)), |
| <a href=#563 id=563 data-nosnippet>563</a> SolverDefId::TypeAliasId(id) => <span class="prelude-val">Some</span>(id.module(db)), |
| <a href=#564 id=564 data-nosnippet>564</a> SolverDefId::TraitId(id) => <span class="prelude-val">Some</span>(id.module(db)), |
| <a href=#565 id=565 data-nosnippet>565</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#566 id=566 data-nosnippet>566</a> } |
| <a href=#567 id=567 data-nosnippet>567</a>} |
| <a href=#568 id=568 data-nosnippet>568</a> |
| <a href=#569 id=569 data-nosnippet>569</a><span class="attr">#[derive(Debug, PartialEq, Eq)] |
| <a href=#570 id=570 data-nosnippet>570</a></span><span class="kw">pub struct </span>InherentImpls { |
| <a href=#571 id=571 data-nosnippet>571</a> map: FxHashMap<SimplifiedType, Box<[ImplId]>>, |
| <a href=#572 id=572 data-nosnippet>572</a>} |
| <a href=#573 id=573 data-nosnippet>573</a> |
| <a href=#574 id=574 data-nosnippet>574</a><span class="attr">#[salsa::tracked] |
| <a href=#575 id=575 data-nosnippet>575</a></span><span class="kw">impl </span>InherentImpls { |
| <a href=#576 id=576 data-nosnippet>576</a> <span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>))] |
| <a href=#577 id=577 data-nosnippet>577</a> </span><span class="kw">pub fn </span>for_crate(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, krate: Crate) -> <span class="self">Self </span>{ |
| <a href=#578 id=578 data-nosnippet>578</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"inherent_impls_in_crate_query"</span>, <span class="question-mark">?</span>krate).entered(); |
| <a href=#579 id=579 data-nosnippet>579</a> |
| <a href=#580 id=580 data-nosnippet>580</a> <span class="kw">let </span>crate_def_map = crate_def_map(db, krate); |
| <a href=#581 id=581 data-nosnippet>581</a> |
| <a href=#582 id=582 data-nosnippet>582</a> <span class="self">Self</span>::collect_def_map(db, crate_def_map) |
| <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> <span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>))] |
| <a href=#586 id=586 data-nosnippet>586</a> </span><span class="kw">pub fn </span>for_block(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, block: BlockId) -> <span class="prelude-ty">Option</span><Box<<span class="self">Self</span>>> { |
| <a href=#587 id=587 data-nosnippet>587</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"inherent_impls_in_block_query"</span>).entered(); |
| <a href=#588 id=588 data-nosnippet>588</a> |
| <a href=#589 id=589 data-nosnippet>589</a> <span class="kw">let </span>block_def_map = block_def_map(db, block); |
| <a href=#590 id=590 data-nosnippet>590</a> <span class="kw">let </span>result = <span class="self">Self</span>::collect_def_map(db, block_def_map); |
| <a href=#591 id=591 data-nosnippet>591</a> <span class="kw">if </span>result.map.is_empty() { <span class="prelude-val">None </span>} <span class="kw">else </span>{ <span class="prelude-val">Some</span>(Box::new(result)) } |
| <a href=#592 id=592 data-nosnippet>592</a> } |
| <a href=#593 id=593 data-nosnippet>593</a>} |
| <a href=#594 id=594 data-nosnippet>594</a> |
| <a href=#595 id=595 data-nosnippet>595</a><span class="kw">impl </span>InherentImpls { |
| <a href=#596 id=596 data-nosnippet>596</a> <span class="kw">fn </span>collect_def_map(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, def_map: <span class="kw-2">&</span>DefMap) -> <span class="self">Self </span>{ |
| <a href=#597 id=597 data-nosnippet>597</a> <span class="kw">let </span><span class="kw-2">mut </span>map = FxHashMap::default(); |
| <a href=#598 id=598 data-nosnippet>598</a> collect(db, def_map, <span class="kw-2">&mut </span>map); |
| <a href=#599 id=599 data-nosnippet>599</a> <span class="kw">let </span><span class="kw-2">mut </span>map = map |
| <a href=#600 id=600 data-nosnippet>600</a> .into_iter() |
| <a href=#601 id=601 data-nosnippet>601</a> .map(|(self_ty, impls)| (self_ty, impls.into_boxed_slice())) |
| <a href=#602 id=602 data-nosnippet>602</a> .collect::<FxHashMap<<span class="kw">_</span>, <span class="kw">_</span>>>(); |
| <a href=#603 id=603 data-nosnippet>603</a> map.shrink_to_fit(); |
| <a href=#604 id=604 data-nosnippet>604</a> <span class="kw">return </span><span class="self">Self </span>{ map }; |
| <a href=#605 id=605 data-nosnippet>605</a> |
| <a href=#606 id=606 data-nosnippet>606</a> <span class="kw">fn </span>collect( |
| <a href=#607 id=607 data-nosnippet>607</a> db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, |
| <a href=#608 id=608 data-nosnippet>608</a> def_map: <span class="kw-2">&</span>DefMap, |
| <a href=#609 id=609 data-nosnippet>609</a> map: <span class="kw-2">&mut </span>FxHashMap<SimplifiedType, Vec<ImplId>>, |
| <a href=#610 id=610 data-nosnippet>610</a> ) { |
| <a href=#611 id=611 data-nosnippet>611</a> <span class="kw">for </span>(_module_id, module_data) <span class="kw">in </span>def_map.modules() { |
| <a href=#612 id=612 data-nosnippet>612</a> <span class="kw">for </span>impl_id <span class="kw">in </span>module_data.scope.inherent_impls() { |
| <a href=#613 id=613 data-nosnippet>613</a> <span class="kw">let </span>interner = DbInterner::new_no_crate(db); |
| <a href=#614 id=614 data-nosnippet>614</a> <span class="kw">let </span>self_ty = db.impl_self_ty(impl_id); |
| <a href=#615 id=615 data-nosnippet>615</a> <span class="kw">let </span>self_ty = self_ty.instantiate_identity(); |
| <a href=#616 id=616 data-nosnippet>616</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(self_ty) = |
| <a href=#617 id=617 data-nosnippet>617</a> simplify_type(interner, self_ty, TreatParams::InstantiateWithInfer) |
| <a href=#618 id=618 data-nosnippet>618</a> { |
| <a href=#619 id=619 data-nosnippet>619</a> map.entry(self_ty).or_default().push(impl_id); |
| <a href=#620 id=620 data-nosnippet>620</a> } |
| <a href=#621 id=621 data-nosnippet>621</a> } |
| <a href=#622 id=622 data-nosnippet>622</a> |
| <a href=#623 id=623 data-nosnippet>623</a> <span class="comment">// To better support custom derives, collect impls in all unnamed const items. |
| <a href=#624 id=624 data-nosnippet>624</a> // const _: () = { ... }; |
| <a href=#625 id=625 data-nosnippet>625</a> </span><span class="kw">for </span>konst <span class="kw">in </span>module_data.scope.unnamed_consts() { |
| <a href=#626 id=626 data-nosnippet>626</a> <span class="kw">let </span>body = db.body(konst.into()); |
| <a href=#627 id=627 data-nosnippet>627</a> <span class="kw">for </span>(<span class="kw">_</span>, block_def_map) <span class="kw">in </span>body.blocks(db) { |
| <a href=#628 id=628 data-nosnippet>628</a> collect(db, block_def_map, map); |
| <a href=#629 id=629 data-nosnippet>629</a> } |
| <a href=#630 id=630 data-nosnippet>630</a> } |
| <a href=#631 id=631 data-nosnippet>631</a> } |
| <a href=#632 id=632 data-nosnippet>632</a> } |
| <a href=#633 id=633 data-nosnippet>633</a> } |
| <a href=#634 id=634 data-nosnippet>634</a> |
| <a href=#635 id=635 data-nosnippet>635</a> <span class="kw">pub fn </span>for_self_ty(<span class="kw-2">&</span><span class="self">self</span>, self_ty: <span class="kw-2">&</span>SimplifiedType) -> <span class="kw-2">&</span>[ImplId] { |
| <a href=#636 id=636 data-nosnippet>636</a> <span class="self">self</span>.map.get(self_ty).map(|it| <span class="kw-2">&**</span>it).unwrap_or_default() |
| <a href=#637 id=637 data-nosnippet>637</a> } |
| <a href=#638 id=638 data-nosnippet>638</a> |
| <a href=#639 id=639 data-nosnippet>639</a> <span class="kw">pub fn </span>for_each_crate_and_block( |
| <a href=#640 id=640 data-nosnippet>640</a> db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, |
| <a href=#641 id=641 data-nosnippet>641</a> krate: Crate, |
| <a href=#642 id=642 data-nosnippet>642</a> block: <span class="prelude-ty">Option</span><BlockId>, |
| <a href=#643 id=643 data-nosnippet>643</a> for_each: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>InherentImpls), |
| <a href=#644 id=644 data-nosnippet>644</a> ) { |
| <a href=#645 id=645 data-nosnippet>645</a> <span class="kw">let </span>blocks = std::iter::successors(block, |block| block.loc(db).module.block(db)); |
| <a href=#646 id=646 data-nosnippet>646</a> blocks.filter_map(|block| <span class="self">Self</span>::for_block(db, block).as_deref()).for_each(<span class="kw-2">&mut *</span>for_each); |
| <a href=#647 id=647 data-nosnippet>647</a> for_each(<span class="self">Self</span>::for_crate(db, krate)); |
| <a href=#648 id=648 data-nosnippet>648</a> } |
| <a href=#649 id=649 data-nosnippet>649</a>} |
| <a href=#650 id=650 data-nosnippet>650</a> |
| <a href=#651 id=651 data-nosnippet>651</a><span class="attr">#[derive(Debug, PartialEq)] |
| <a href=#652 id=652 data-nosnippet>652</a></span><span class="kw">struct </span>OneTraitImpls { |
| <a href=#653 id=653 data-nosnippet>653</a> non_blanket_impls: FxHashMap<SimplifiedType, (Box<[ImplId]>, Box<[BuiltinDeriveImplId]>)>, |
| <a href=#654 id=654 data-nosnippet>654</a> blanket_impls: Box<[ImplId]>, |
| <a href=#655 id=655 data-nosnippet>655</a>} |
| <a href=#656 id=656 data-nosnippet>656</a> |
| <a href=#657 id=657 data-nosnippet>657</a><span class="attr">#[derive(Default)] |
| <a href=#658 id=658 data-nosnippet>658</a></span><span class="kw">struct </span>OneTraitImplsBuilder { |
| <a href=#659 id=659 data-nosnippet>659</a> non_blanket_impls: FxHashMap<SimplifiedType, (Vec<ImplId>, Vec<BuiltinDeriveImplId>)>, |
| <a href=#660 id=660 data-nosnippet>660</a> blanket_impls: Vec<ImplId>, |
| <a href=#661 id=661 data-nosnippet>661</a>} |
| <a href=#662 id=662 data-nosnippet>662</a> |
| <a href=#663 id=663 data-nosnippet>663</a><span class="kw">impl </span>OneTraitImplsBuilder { |
| <a href=#664 id=664 data-nosnippet>664</a> <span class="kw">fn </span>finish(<span class="self">self</span>) -> OneTraitImpls { |
| <a href=#665 id=665 data-nosnippet>665</a> <span class="kw">let </span><span class="kw-2">mut </span>non_blanket_impls = <span class="self">self |
| <a href=#666 id=666 data-nosnippet>666</a> </span>.non_blanket_impls |
| <a href=#667 id=667 data-nosnippet>667</a> .into_iter() |
| <a href=#668 id=668 data-nosnippet>668</a> .map(|(self_ty, (impls, builtin_derive_impls))| { |
| <a href=#669 id=669 data-nosnippet>669</a> (self_ty, (impls.into_boxed_slice(), builtin_derive_impls.into_boxed_slice())) |
| <a href=#670 id=670 data-nosnippet>670</a> }) |
| <a href=#671 id=671 data-nosnippet>671</a> .collect::<FxHashMap<<span class="kw">_</span>, <span class="kw">_</span>>>(); |
| <a href=#672 id=672 data-nosnippet>672</a> non_blanket_impls.shrink_to_fit(); |
| <a href=#673 id=673 data-nosnippet>673</a> <span class="kw">let </span>blanket_impls = <span class="self">self</span>.blanket_impls.into_boxed_slice(); |
| <a href=#674 id=674 data-nosnippet>674</a> OneTraitImpls { non_blanket_impls, blanket_impls } |
| <a href=#675 id=675 data-nosnippet>675</a> } |
| <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="attr">#[derive(Debug, PartialEq)] |
| <a href=#679 id=679 data-nosnippet>679</a></span><span class="kw">pub struct </span>TraitImpls { |
| <a href=#680 id=680 data-nosnippet>680</a> map: FxHashMap<TraitId, OneTraitImpls>, |
| <a href=#681 id=681 data-nosnippet>681</a>} |
| <a href=#682 id=682 data-nosnippet>682</a> |
| <a href=#683 id=683 data-nosnippet>683</a><span class="attr">#[salsa::tracked] |
| <a href=#684 id=684 data-nosnippet>684</a></span><span class="kw">impl </span>TraitImpls { |
| <a href=#685 id=685 data-nosnippet>685</a> <span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>))] |
| <a href=#686 id=686 data-nosnippet>686</a> </span><span class="kw">pub fn </span>for_crate(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, krate: Crate) -> Arc<<span class="self">Self</span>> { |
| <a href=#687 id=687 data-nosnippet>687</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"inherent_impls_in_crate_query"</span>, <span class="question-mark">?</span>krate).entered(); |
| <a href=#688 id=688 data-nosnippet>688</a> |
| <a href=#689 id=689 data-nosnippet>689</a> <span class="kw">let </span>crate_def_map = crate_def_map(db, krate); |
| <a href=#690 id=690 data-nosnippet>690</a> <span class="kw">let </span>result = <span class="self">Self</span>::collect_def_map(db, crate_def_map); |
| <a href=#691 id=691 data-nosnippet>691</a> Arc::new(result) |
| <a href=#692 id=692 data-nosnippet>692</a> } |
| <a href=#693 id=693 data-nosnippet>693</a> |
| <a href=#694 id=694 data-nosnippet>694</a> <span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>))] |
| <a href=#695 id=695 data-nosnippet>695</a> </span><span class="kw">pub fn </span>for_block(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, block: BlockId) -> <span class="prelude-ty">Option</span><Box<<span class="self">Self</span>>> { |
| <a href=#696 id=696 data-nosnippet>696</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"inherent_impls_in_block_query"</span>).entered(); |
| <a href=#697 id=697 data-nosnippet>697</a> |
| <a href=#698 id=698 data-nosnippet>698</a> <span class="kw">let </span>block_def_map = block_def_map(db, block); |
| <a href=#699 id=699 data-nosnippet>699</a> <span class="kw">let </span>result = <span class="self">Self</span>::collect_def_map(db, block_def_map); |
| <a href=#700 id=700 data-nosnippet>700</a> <span class="kw">if </span>result.map.is_empty() { <span class="prelude-val">None </span>} <span class="kw">else </span>{ <span class="prelude-val">Some</span>(Box::new(result)) } |
| <a href=#701 id=701 data-nosnippet>701</a> } |
| <a href=#702 id=702 data-nosnippet>702</a> |
| <a href=#703 id=703 data-nosnippet>703</a> <span class="attr">#[salsa::tracked(returns(<span class="kw-2">ref</span>))] |
| <a href=#704 id=704 data-nosnippet>704</a> </span><span class="kw">pub fn </span>for_crate_and_deps(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, krate: Crate) -> Box<[Arc<<span class="self">Self</span>>]> { |
| <a href=#705 id=705 data-nosnippet>705</a> krate.transitive_deps(db).iter().map(|<span class="kw-2">&</span>dep| <span class="self">Self</span>::for_crate(db, dep).clone()).collect() |
| <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> |
| <a href=#709 id=709 data-nosnippet>709</a><span class="kw">impl </span>TraitImpls { |
| <a href=#710 id=710 data-nosnippet>710</a> <span class="kw">fn </span>collect_def_map(db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, def_map: <span class="kw-2">&</span>DefMap) -> <span class="self">Self </span>{ |
| <a href=#711 id=711 data-nosnippet>711</a> <span class="kw">let </span>lang_items = hir_def::lang_item::lang_items(db, def_map.krate()); |
| <a href=#712 id=712 data-nosnippet>712</a> <span class="kw">let </span><span class="kw-2">mut </span>map = FxHashMap::default(); |
| <a href=#713 id=713 data-nosnippet>713</a> collect(db, def_map, lang_items, <span class="kw-2">&mut </span>map); |
| <a href=#714 id=714 data-nosnippet>714</a> <span class="kw">let </span><span class="kw-2">mut </span>map = map |
| <a href=#715 id=715 data-nosnippet>715</a> .into_iter() |
| <a href=#716 id=716 data-nosnippet>716</a> .map(|(trait_id, trait_map)| (trait_id, trait_map.finish())) |
| <a href=#717 id=717 data-nosnippet>717</a> .collect::<FxHashMap<<span class="kw">_</span>, <span class="kw">_</span>>>(); |
| <a href=#718 id=718 data-nosnippet>718</a> map.shrink_to_fit(); |
| <a href=#719 id=719 data-nosnippet>719</a> <span class="kw">return </span><span class="self">Self </span>{ map }; |
| <a href=#720 id=720 data-nosnippet>720</a> |
| <a href=#721 id=721 data-nosnippet>721</a> <span class="kw">fn </span>collect( |
| <a href=#722 id=722 data-nosnippet>722</a> db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, |
| <a href=#723 id=723 data-nosnippet>723</a> def_map: <span class="kw-2">&</span>DefMap, |
| <a href=#724 id=724 data-nosnippet>724</a> lang_items: <span class="kw-2">&</span>LangItems, |
| <a href=#725 id=725 data-nosnippet>725</a> map: <span class="kw-2">&mut </span>FxHashMap<TraitId, OneTraitImplsBuilder>, |
| <a href=#726 id=726 data-nosnippet>726</a> ) { |
| <a href=#727 id=727 data-nosnippet>727</a> <span class="kw">for </span>(_module_id, module_data) <span class="kw">in </span>def_map.modules() { |
| <a href=#728 id=728 data-nosnippet>728</a> <span class="kw">for </span>impl_id <span class="kw">in </span>module_data.scope.trait_impls() { |
| <a href=#729 id=729 data-nosnippet>729</a> <span class="kw">let </span>trait_ref = <span class="kw">match </span>db.impl_trait(impl_id) { |
| <a href=#730 id=730 data-nosnippet>730</a> <span class="prelude-val">Some</span>(tr) => tr.instantiate_identity(), |
| <a href=#731 id=731 data-nosnippet>731</a> <span class="prelude-val">None </span>=> <span class="kw">continue</span>, |
| <a href=#732 id=732 data-nosnippet>732</a> }; |
| <a href=#733 id=733 data-nosnippet>733</a> <span class="comment">// Reservation impls should be ignored during trait resolution, so we never need |
| <a href=#734 id=734 data-nosnippet>734</a> // them during type analysis. See rust-lang/rust#64631 for details. |
| <a href=#735 id=735 data-nosnippet>735</a> // |
| <a href=#736 id=736 data-nosnippet>736</a> // FIXME: Reservation impls should be considered during coherence checks. If we are |
| <a href=#737 id=737 data-nosnippet>737</a> // (ever) to implement coherence checks, this filtering should be done by the trait |
| <a href=#738 id=738 data-nosnippet>738</a> // solver. |
| <a href=#739 id=739 data-nosnippet>739</a> </span><span class="kw">if </span>AttrFlags::query(db, impl_id.into()) |
| <a href=#740 id=740 data-nosnippet>740</a> .contains(AttrFlags::RUSTC_RESERVATION_IMPL) |
| <a href=#741 id=741 data-nosnippet>741</a> { |
| <a href=#742 id=742 data-nosnippet>742</a> <span class="kw">continue</span>; |
| <a href=#743 id=743 data-nosnippet>743</a> } |
| <a href=#744 id=744 data-nosnippet>744</a> <span class="kw">let </span>self_ty = trait_ref.self_ty(); |
| <a href=#745 id=745 data-nosnippet>745</a> <span class="kw">let </span>interner = DbInterner::new_no_crate(db); |
| <a href=#746 id=746 data-nosnippet>746</a> <span class="kw">let </span>entry = map.entry(trait_ref.def_id.<span class="number">0</span>).or_default(); |
| <a href=#747 id=747 data-nosnippet>747</a> <span class="kw">match </span>simplify_type(interner, self_ty, TreatParams::InstantiateWithInfer) { |
| <a href=#748 id=748 data-nosnippet>748</a> <span class="prelude-val">Some</span>(self_ty) => { |
| <a href=#749 id=749 data-nosnippet>749</a> entry.non_blanket_impls.entry(self_ty).or_default().<span class="number">0</span>.push(impl_id) |
| <a href=#750 id=750 data-nosnippet>750</a> } |
| <a href=#751 id=751 data-nosnippet>751</a> <span class="prelude-val">None </span>=> entry.blanket_impls.push(impl_id), |
| <a href=#752 id=752 data-nosnippet>752</a> } |
| <a href=#753 id=753 data-nosnippet>753</a> } |
| <a href=#754 id=754 data-nosnippet>754</a> |
| <a href=#755 id=755 data-nosnippet>755</a> <span class="kw">for </span>impl_id <span class="kw">in </span>module_data.scope.builtin_derive_impls() { |
| <a href=#756 id=756 data-nosnippet>756</a> <span class="kw">let </span>loc = impl_id.loc(db); |
| <a href=#757 id=757 data-nosnippet>757</a> <span class="kw">let </span><span class="prelude-val">Some</span>(trait_id) = loc.trait_.get_id(lang_items) <span class="kw">else </span>{ <span class="kw">continue </span>}; |
| <a href=#758 id=758 data-nosnippet>758</a> <span class="kw">let </span>entry = map.entry(trait_id).or_default(); |
| <a href=#759 id=759 data-nosnippet>759</a> <span class="kw">let </span>entry = entry |
| <a href=#760 id=760 data-nosnippet>760</a> .non_blanket_impls |
| <a href=#761 id=761 data-nosnippet>761</a> .entry(SimplifiedType::Adt(loc.adt.into())) |
| <a href=#762 id=762 data-nosnippet>762</a> .or_default(); |
| <a href=#763 id=763 data-nosnippet>763</a> entry.<span class="number">1</span>.push(impl_id); |
| <a href=#764 id=764 data-nosnippet>764</a> } |
| <a href=#765 id=765 data-nosnippet>765</a> |
| <a href=#766 id=766 data-nosnippet>766</a> <span class="comment">// To better support custom derives, collect impls in all unnamed const items. |
| <a href=#767 id=767 data-nosnippet>767</a> // const _: () = { ... }; |
| <a href=#768 id=768 data-nosnippet>768</a> </span><span class="kw">for </span>konst <span class="kw">in </span>module_data.scope.unnamed_consts() { |
| <a href=#769 id=769 data-nosnippet>769</a> <span class="kw">let </span>body = db.body(konst.into()); |
| <a href=#770 id=770 data-nosnippet>770</a> <span class="kw">for </span>(<span class="kw">_</span>, block_def_map) <span class="kw">in </span>body.blocks(db) { |
| <a href=#771 id=771 data-nosnippet>771</a> collect(db, block_def_map, lang_items, map); |
| <a href=#772 id=772 data-nosnippet>772</a> } |
| <a href=#773 id=773 data-nosnippet>773</a> } |
| <a href=#774 id=774 data-nosnippet>774</a> } |
| <a href=#775 id=775 data-nosnippet>775</a> } |
| <a href=#776 id=776 data-nosnippet>776</a> } |
| <a href=#777 id=777 data-nosnippet>777</a> |
| <a href=#778 id=778 data-nosnippet>778</a> <span class="kw">pub fn </span>blanket_impls(<span class="kw-2">&</span><span class="self">self</span>, for_trait: TraitId) -> <span class="kw-2">&</span>[ImplId] { |
| <a href=#779 id=779 data-nosnippet>779</a> <span class="self">self</span>.map.get(<span class="kw-2">&</span>for_trait).map(|it| <span class="kw-2">&*</span>it.blanket_impls).unwrap_or_default() |
| <a href=#780 id=780 data-nosnippet>780</a> } |
| <a href=#781 id=781 data-nosnippet>781</a> |
| <a href=#782 id=782 data-nosnippet>782</a> <span class="doccomment">/// Queries whether `self_ty` has potentially applicable implementations of `trait_`. |
| <a href=#783 id=783 data-nosnippet>783</a> </span><span class="kw">pub fn </span>has_impls_for_trait_and_self_ty( |
| <a href=#784 id=784 data-nosnippet>784</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#785 id=785 data-nosnippet>785</a> trait_: TraitId, |
| <a href=#786 id=786 data-nosnippet>786</a> self_ty: <span class="kw-2">&</span>SimplifiedType, |
| <a href=#787 id=787 data-nosnippet>787</a> ) -> bool { |
| <a href=#788 id=788 data-nosnippet>788</a> <span class="self">self</span>.map.get(<span class="kw-2">&</span>trait_).is_some_and(|trait_impls| { |
| <a href=#789 id=789 data-nosnippet>789</a> trait_impls.non_blanket_impls.contains_key(self_ty) |
| <a href=#790 id=790 data-nosnippet>790</a> || !trait_impls.blanket_impls.is_empty() |
| <a href=#791 id=791 data-nosnippet>791</a> }) |
| <a href=#792 id=792 data-nosnippet>792</a> } |
| <a href=#793 id=793 data-nosnippet>793</a> |
| <a href=#794 id=794 data-nosnippet>794</a> <span class="kw">pub fn </span>for_trait_and_self_ty( |
| <a href=#795 id=795 data-nosnippet>795</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#796 id=796 data-nosnippet>796</a> trait_: TraitId, |
| <a href=#797 id=797 data-nosnippet>797</a> self_ty: <span class="kw-2">&</span>SimplifiedType, |
| <a href=#798 id=798 data-nosnippet>798</a> ) -> (<span class="kw-2">&</span>[ImplId], <span class="kw-2">&</span>[BuiltinDeriveImplId]) { |
| <a href=#799 id=799 data-nosnippet>799</a> <span class="self">self</span>.map |
| <a href=#800 id=800 data-nosnippet>800</a> .get(<span class="kw-2">&</span>trait_) |
| <a href=#801 id=801 data-nosnippet>801</a> .and_then(|map| map.non_blanket_impls.get(self_ty)) |
| <a href=#802 id=802 data-nosnippet>802</a> .map(|it| (<span class="kw-2">&*</span>it.<span class="number">0</span>, <span class="kw-2">&*</span>it.<span class="number">1</span>)) |
| <a href=#803 id=803 data-nosnippet>803</a> .unwrap_or_default() |
| <a href=#804 id=804 data-nosnippet>804</a> } |
| <a href=#805 id=805 data-nosnippet>805</a> |
| <a href=#806 id=806 data-nosnippet>806</a> <span class="kw">pub fn </span>for_trait( |
| <a href=#807 id=807 data-nosnippet>807</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#808 id=808 data-nosnippet>808</a> trait_: TraitId, |
| <a href=#809 id=809 data-nosnippet>809</a> <span class="kw-2">mut </span>callback: <span class="kw">impl </span>FnMut(Either<<span class="kw-2">&</span>[ImplId], <span class="kw-2">&</span>[BuiltinDeriveImplId]>), |
| <a href=#810 id=810 data-nosnippet>810</a> ) { |
| <a href=#811 id=811 data-nosnippet>811</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(impls) = <span class="self">self</span>.map.get(<span class="kw-2">&</span>trait_) { |
| <a href=#812 id=812 data-nosnippet>812</a> callback(Either::Left(<span class="kw-2">&</span>impls.blanket_impls)); |
| <a href=#813 id=813 data-nosnippet>813</a> <span class="kw">for </span>impls <span class="kw">in </span>impls.non_blanket_impls.values() { |
| <a href=#814 id=814 data-nosnippet>814</a> callback(Either::Left(<span class="kw-2">&</span>impls.<span class="number">0</span>)); |
| <a href=#815 id=815 data-nosnippet>815</a> callback(Either::Right(<span class="kw-2">&</span>impls.<span class="number">1</span>)); |
| <a href=#816 id=816 data-nosnippet>816</a> } |
| <a href=#817 id=817 data-nosnippet>817</a> } |
| <a href=#818 id=818 data-nosnippet>818</a> } |
| <a href=#819 id=819 data-nosnippet>819</a> |
| <a href=#820 id=820 data-nosnippet>820</a> <span class="kw">pub fn </span>for_self_ty( |
| <a href=#821 id=821 data-nosnippet>821</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#822 id=822 data-nosnippet>822</a> self_ty: <span class="kw-2">&</span>SimplifiedType, |
| <a href=#823 id=823 data-nosnippet>823</a> <span class="kw-2">mut </span>callback: <span class="kw">impl </span>FnMut(Either<<span class="kw-2">&</span>[ImplId], <span class="kw-2">&</span>[BuiltinDeriveImplId]>), |
| <a href=#824 id=824 data-nosnippet>824</a> ) { |
| <a href=#825 id=825 data-nosnippet>825</a> <span class="kw">for </span>for_trait <span class="kw">in </span><span class="self">self</span>.map.values() { |
| <a href=#826 id=826 data-nosnippet>826</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(for_ty) = for_trait.non_blanket_impls.get(self_ty) { |
| <a href=#827 id=827 data-nosnippet>827</a> callback(Either::Left(<span class="kw-2">&</span>for_ty.<span class="number">0</span>)); |
| <a href=#828 id=828 data-nosnippet>828</a> callback(Either::Right(<span class="kw-2">&</span>for_ty.<span class="number">1</span>)); |
| <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> } |
| <a href=#832 id=832 data-nosnippet>832</a> |
| <a href=#833 id=833 data-nosnippet>833</a> <span class="kw">pub fn </span>for_each_crate_and_block( |
| <a href=#834 id=834 data-nosnippet>834</a> db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, |
| <a href=#835 id=835 data-nosnippet>835</a> krate: Crate, |
| <a href=#836 id=836 data-nosnippet>836</a> block: <span class="prelude-ty">Option</span><BlockId>, |
| <a href=#837 id=837 data-nosnippet>837</a> for_each: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>TraitImpls), |
| <a href=#838 id=838 data-nosnippet>838</a> ) { |
| <a href=#839 id=839 data-nosnippet>839</a> <span class="kw">let </span>blocks = std::iter::successors(block, |block| block.loc(db).module.block(db)); |
| <a href=#840 id=840 data-nosnippet>840</a> blocks.filter_map(|block| <span class="self">Self</span>::for_block(db, block).as_deref()).for_each(<span class="kw-2">&mut *</span>for_each); |
| <a href=#841 id=841 data-nosnippet>841</a> <span class="self">Self</span>::for_crate_and_deps(db, krate).iter().map(|it| <span class="kw-2">&**</span>it).for_each(for_each); |
| <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> <span class="doccomment">/// Like [`Self::for_each_crate_and_block()`], but takes in account two blocks, one for a trait and one for a self type. |
| <a href=#845 id=845 data-nosnippet>845</a> </span><span class="kw">pub fn </span>for_each_crate_and_block_trait_and_type( |
| <a href=#846 id=846 data-nosnippet>846</a> db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase, |
| <a href=#847 id=847 data-nosnippet>847</a> krate: Crate, |
| <a href=#848 id=848 data-nosnippet>848</a> type_block: <span class="prelude-ty">Option</span><BlockId>, |
| <a href=#849 id=849 data-nosnippet>849</a> trait_block: <span class="prelude-ty">Option</span><BlockId>, |
| <a href=#850 id=850 data-nosnippet>850</a> for_each: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>TraitImpls), |
| <a href=#851 id=851 data-nosnippet>851</a> ) { |
| <a href=#852 id=852 data-nosnippet>852</a> <span class="kw">let </span>in_self_and_deps = TraitImpls::for_crate_and_deps(db, krate); |
| <a href=#853 id=853 data-nosnippet>853</a> in_self_and_deps.iter().for_each(|impls| for_each(impls)); |
| <a href=#854 id=854 data-nosnippet>854</a> |
| <a href=#855 id=855 data-nosnippet>855</a> <span class="comment">// We must not provide duplicate impls to the solver. Therefore we work with the following strategy: |
| <a href=#856 id=856 data-nosnippet>856</a> // start from each block, and walk ancestors until you meet the other block. If they never meet, |
| <a href=#857 id=857 data-nosnippet>857</a> // that means there can't be duplicate impls; if they meet, we stop the search of the deeper block. |
| <a href=#858 id=858 data-nosnippet>858</a> // This breaks when they are equal (both will stop immediately), therefore we handle this case |
| <a href=#859 id=859 data-nosnippet>859</a> // specifically. |
| <a href=#860 id=860 data-nosnippet>860</a> </span><span class="kw">let </span>blocks_iter = |block: <span class="prelude-ty">Option</span><BlockId>| { |
| <a href=#861 id=861 data-nosnippet>861</a> std::iter::successors(block, |block| block.loc(db).module.block(db)) |
| <a href=#862 id=862 data-nosnippet>862</a> }; |
| <a href=#863 id=863 data-nosnippet>863</a> <span class="kw">let </span>for_each_block = |current_block: <span class="prelude-ty">Option</span><BlockId>, other_block: <span class="prelude-ty">Option</span><BlockId>| { |
| <a href=#864 id=864 data-nosnippet>864</a> blocks_iter(current_block) |
| <a href=#865 id=865 data-nosnippet>865</a> .take_while(<span class="kw">move </span>|<span class="kw-2">&</span>block| { |
| <a href=#866 id=866 data-nosnippet>866</a> other_block.is_none_or(|other_block| <span class="macro">other_block !</span>= block) |
| <a href=#867 id=867 data-nosnippet>867</a> }) |
| <a href=#868 id=868 data-nosnippet>868</a> .filter_map(<span class="kw">move </span>|block| TraitImpls::for_block(db, block).as_deref()) |
| <a href=#869 id=869 data-nosnippet>869</a> }; |
| <a href=#870 id=870 data-nosnippet>870</a> <span class="kw">if </span>trait_block == type_block { |
| <a href=#871 id=871 data-nosnippet>871</a> blocks_iter(trait_block) |
| <a href=#872 id=872 data-nosnippet>872</a> .filter_map(|block| TraitImpls::for_block(db, block).as_deref()) |
| <a href=#873 id=873 data-nosnippet>873</a> .for_each(for_each); |
| <a href=#874 id=874 data-nosnippet>874</a> } <span class="kw">else </span>{ |
| <a href=#875 id=875 data-nosnippet>875</a> for_each_block(trait_block, type_block).for_each(<span class="kw-2">&mut *</span>for_each); |
| <a href=#876 id=876 data-nosnippet>876</a> for_each_block(type_block, trait_block).for_each(for_each); |
| <a href=#877 id=877 data-nosnippet>877</a> } |
| <a href=#878 id=878 data-nosnippet>878</a> } |
| <a href=#879 id=879 data-nosnippet>879</a>} |
| </code></pre></div></section></main></body></html> |
