| <!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/closure/analysis.rs`."><title>analysis.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-ca0dd0c4.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="1.92.0 (ded5c06cf 2025-12-08)" data-channel="1.92.0" data-search-js="search-d69d8955.js" data-stringdex-js="stringdex-c3e638e9.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-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../../../static.files/noscript-263c88ec.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/infer/closure/</div>analysis.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">//! Post-inference closure analysis: captures and closure kind. |
| <a href=#2 id=2 data-nosnippet>2</a> |
| <a href=#3 id=3 data-nosnippet>3</a></span><span class="kw">use </span>std::{cmp, convert::Infallible, mem}; |
| <a href=#4 id=4 data-nosnippet>4</a> |
| <a href=#5 id=5 data-nosnippet>5</a><span class="kw">use </span>either::Either; |
| <a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>hir_def::{ |
| <a href=#7 id=7 data-nosnippet>7</a> DefWithBodyId, FieldId, HasModule, TupleFieldId, TupleId, VariantId, |
| <a href=#8 id=8 data-nosnippet>8</a> expr_store::path::Path, |
| <a href=#9 id=9 data-nosnippet>9</a> hir::{ |
| <a href=#10 id=10 data-nosnippet>10</a> Array, AsmOperand, BinaryOp, BindingId, CaptureBy, Expr, ExprId, ExprOrPatId, Pat, PatId, |
| <a href=#11 id=11 data-nosnippet>11</a> Statement, UnaryOp, |
| <a href=#12 id=12 data-nosnippet>12</a> }, |
| <a href=#13 id=13 data-nosnippet>13</a> item_tree::FieldsShape, |
| <a href=#14 id=14 data-nosnippet>14</a> resolver::ValueNs, |
| <a href=#15 id=15 data-nosnippet>15</a>}; |
| <a href=#16 id=16 data-nosnippet>16</a><span class="kw">use </span>rustc_ast_ir::Mutability; |
| <a href=#17 id=17 data-nosnippet>17</a><span class="kw">use </span>rustc_hash::{FxHashMap, FxHashSet}; |
| <a href=#18 id=18 data-nosnippet>18</a><span class="kw">use </span>rustc_type_ir::inherent::{IntoKind, SliceLike, Ty <span class="kw">as _</span>}; |
| <a href=#19 id=19 data-nosnippet>19</a><span class="kw">use </span>smallvec::{SmallVec, smallvec}; |
| <a href=#20 id=20 data-nosnippet>20</a><span class="kw">use </span>stdx::{format_to, never}; |
| <a href=#21 id=21 data-nosnippet>21</a><span class="kw">use </span>syntax::utils::is_raw_identifier; |
| <a href=#22 id=22 data-nosnippet>22</a> |
| <a href=#23 id=23 data-nosnippet>23</a><span class="kw">use crate</span>::{ |
| <a href=#24 id=24 data-nosnippet>24</a> Adjust, Adjustment, BindingMode, |
| <a href=#25 id=25 data-nosnippet>25</a> db::{HirDatabase, InternedClosure, InternedClosureId}, |
| <a href=#26 id=26 data-nosnippet>26</a> infer::InferenceContext, |
| <a href=#27 id=27 data-nosnippet>27</a> mir::{BorrowKind, MirSpan, MutBorrowKind, ProjectionElem}, |
| <a href=#28 id=28 data-nosnippet>28</a> next_solver::{DbInterner, EarlyBinder, GenericArgs, Ty, TyKind}, |
| <a href=#29 id=29 data-nosnippet>29</a> traits::FnTrait, |
| <a href=#30 id=30 data-nosnippet>30</a>}; |
| <a href=#31 id=31 data-nosnippet>31</a> |
| <a href=#32 id=32 data-nosnippet>32</a><span class="comment">// The below functions handle capture and closure kind (Fn, FnMut, ..) |
| <a href=#33 id=33 data-nosnippet>33</a> |
| <a href=#34 id=34 data-nosnippet>34</a></span><span class="attr">#[derive(Debug, Clone, PartialEq, Eq, Hash, salsa::Update)] |
| <a href=#35 id=35 data-nosnippet>35</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>HirPlace<<span class="lifetime">'db</span>> { |
| <a href=#36 id=36 data-nosnippet>36</a> <span class="kw">pub</span>(<span class="kw">crate</span>) local: BindingId, |
| <a href=#37 id=37 data-nosnippet>37</a> <span class="kw">pub</span>(<span class="kw">crate</span>) projections: Vec<ProjectionElem<<span class="lifetime">'db</span>, Infallible>>, |
| <a href=#38 id=38 data-nosnippet>38</a>} |
| <a href=#39 id=39 data-nosnippet>39</a> |
| <a href=#40 id=40 data-nosnippet>40</a><span class="kw">impl</span><<span class="lifetime">'db</span>> HirPlace<<span class="lifetime">'db</span>> { |
| <a href=#41 id=41 data-nosnippet>41</a> <span class="kw">fn </span>ty(<span class="kw-2">&</span><span class="self">self</span>, ctx: <span class="kw-2">&mut </span>InferenceContext<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#42 id=42 data-nosnippet>42</a> <span class="kw">let </span><span class="kw-2">mut </span>ty = ctx.table.resolve_completely(ctx.result[<span class="self">self</span>.local]); |
| <a href=#43 id=43 data-nosnippet>43</a> <span class="kw">for </span>p <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.projections { |
| <a href=#44 id=44 data-nosnippet>44</a> ty = p.projected_ty( |
| <a href=#45 id=45 data-nosnippet>45</a> <span class="kw-2">&</span>ctx.table.infer_ctxt, |
| <a href=#46 id=46 data-nosnippet>46</a> ctx.table.param_env, |
| <a href=#47 id=47 data-nosnippet>47</a> ty, |
| <a href=#48 id=48 data-nosnippet>48</a> |<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>| { |
| <a href=#49 id=49 data-nosnippet>49</a> <span class="macro">unreachable!</span>(<span class="string">"Closure field only happens in MIR"</span>); |
| <a href=#50 id=50 data-nosnippet>50</a> }, |
| <a href=#51 id=51 data-nosnippet>51</a> ctx.owner.module(ctx.db).krate(ctx.db), |
| <a href=#52 id=52 data-nosnippet>52</a> ); |
| <a href=#53 id=53 data-nosnippet>53</a> } |
| <a href=#54 id=54 data-nosnippet>54</a> ty |
| <a href=#55 id=55 data-nosnippet>55</a> } |
| <a href=#56 id=56 data-nosnippet>56</a> |
| <a href=#57 id=57 data-nosnippet>57</a> <span class="kw">fn </span>capture_kind_of_truncated_place( |
| <a href=#58 id=58 data-nosnippet>58</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#59 id=59 data-nosnippet>59</a> <span class="kw-2">mut </span>current_capture: CaptureKind, |
| <a href=#60 id=60 data-nosnippet>60</a> len: usize, |
| <a href=#61 id=61 data-nosnippet>61</a> ) -> CaptureKind { |
| <a href=#62 id=62 data-nosnippet>62</a> <span class="kw">if let </span>CaptureKind::ByRef(BorrowKind::Mut { |
| <a href=#63 id=63 data-nosnippet>63</a> kind: MutBorrowKind::Default | MutBorrowKind::TwoPhasedBorrow, |
| <a href=#64 id=64 data-nosnippet>64</a> }) = current_capture |
| <a href=#65 id=65 data-nosnippet>65</a> && <span class="self">self</span>.projections[len..].contains(<span class="kw-2">&</span>ProjectionElem::Deref) |
| <a href=#66 id=66 data-nosnippet>66</a> { |
| <a href=#67 id=67 data-nosnippet>67</a> current_capture = |
| <a href=#68 id=68 data-nosnippet>68</a> CaptureKind::ByRef(BorrowKind::Mut { kind: MutBorrowKind::ClosureCapture }); |
| <a href=#69 id=69 data-nosnippet>69</a> } |
| <a href=#70 id=70 data-nosnippet>70</a> current_capture |
| <a href=#71 id=71 data-nosnippet>71</a> } |
| <a href=#72 id=72 data-nosnippet>72</a>} |
| <a href=#73 id=73 data-nosnippet>73</a> |
| <a href=#74 id=74 data-nosnippet>74</a><span class="attr">#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)] |
| <a href=#75 id=75 data-nosnippet>75</a></span><span class="kw">pub enum </span>CaptureKind { |
| <a href=#76 id=76 data-nosnippet>76</a> ByRef(BorrowKind), |
| <a href=#77 id=77 data-nosnippet>77</a> ByValue, |
| <a href=#78 id=78 data-nosnippet>78</a>} |
| <a href=#79 id=79 data-nosnippet>79</a> |
| <a href=#80 id=80 data-nosnippet>80</a><span class="attr">#[derive(Debug, Clone, PartialEq, Eq, salsa::Update)] |
| <a href=#81 id=81 data-nosnippet>81</a></span><span class="kw">pub struct </span>CapturedItem<<span class="lifetime">'db</span>> { |
| <a href=#82 id=82 data-nosnippet>82</a> <span class="kw">pub</span>(<span class="kw">crate</span>) place: HirPlace<<span class="lifetime">'db</span>>, |
| <a href=#83 id=83 data-nosnippet>83</a> <span class="kw">pub</span>(<span class="kw">crate</span>) kind: CaptureKind, |
| <a href=#84 id=84 data-nosnippet>84</a> <span class="doccomment">/// The inner vec is the stacks; the outer vec is for each capture reference. |
| <a href=#85 id=85 data-nosnippet>85</a> /// |
| <a href=#86 id=86 data-nosnippet>86</a> /// Even though we always report only the last span (i.e. the most inclusive span), |
| <a href=#87 id=87 data-nosnippet>87</a> /// we need to keep them all, since when a closure occurs inside a closure, we |
| <a href=#88 id=88 data-nosnippet>88</a> /// copy all captures of the inner closure to the outer closure, and then we may |
| <a href=#89 id=89 data-nosnippet>89</a> /// truncate them, and we want the correct span to be reported. |
| <a href=#90 id=90 data-nosnippet>90</a> </span>span_stacks: SmallVec<[SmallVec<[MirSpan; <span class="number">3</span>]>; <span class="number">3</span>]>, |
| <a href=#91 id=91 data-nosnippet>91</a> <span class="attr">#[update(<span class="kw">unsafe</span>(with(<span class="kw">crate</span>::utils::unsafe_update_eq)))] |
| <a href=#92 id=92 data-nosnippet>92</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) ty: EarlyBinder<<span class="lifetime">'db</span>, Ty<<span class="lifetime">'db</span>>>, |
| <a href=#93 id=93 data-nosnippet>93</a>} |
| <a href=#94 id=94 data-nosnippet>94</a> |
| <a href=#95 id=95 data-nosnippet>95</a><span class="kw">impl</span><<span class="lifetime">'db</span>> CapturedItem<<span class="lifetime">'db</span>> { |
| <a href=#96 id=96 data-nosnippet>96</a> <span class="kw">pub fn </span>local(<span class="kw-2">&</span><span class="self">self</span>) -> BindingId { |
| <a href=#97 id=97 data-nosnippet>97</a> <span class="self">self</span>.place.local |
| <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="doccomment">/// Returns whether this place has any field (aka. non-deref) projections. |
| <a href=#101 id=101 data-nosnippet>101</a> </span><span class="kw">pub fn </span>has_field_projections(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <a href=#102 id=102 data-nosnippet>102</a> <span class="self">self</span>.place.projections.iter().any(|it| !<span class="macro">matches!</span>(it, ProjectionElem::Deref)) |
| <a href=#103 id=103 data-nosnippet>103</a> } |
| <a href=#104 id=104 data-nosnippet>104</a> |
| <a href=#105 id=105 data-nosnippet>105</a> <span class="kw">pub fn </span>ty(<span class="kw-2">&</span><span class="self">self</span>, db: <span class="kw-2">&</span><span class="lifetime">'db </span><span class="kw">dyn </span>HirDatabase, subst: GenericArgs<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#106 id=106 data-nosnippet>106</a> <span class="kw">let </span>interner = DbInterner::new_no_crate(db); |
| <a href=#107 id=107 data-nosnippet>107</a> <span class="self">self</span>.ty.instantiate(interner, subst.split_closure_args_untupled().parent_args) |
| <a href=#108 id=108 data-nosnippet>108</a> } |
| <a href=#109 id=109 data-nosnippet>109</a> |
| <a href=#110 id=110 data-nosnippet>110</a> <span class="kw">pub fn </span>kind(<span class="kw-2">&</span><span class="self">self</span>) -> CaptureKind { |
| <a href=#111 id=111 data-nosnippet>111</a> <span class="self">self</span>.kind |
| <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">pub fn </span>spans(<span class="kw-2">&</span><span class="self">self</span>) -> SmallVec<[MirSpan; <span class="number">3</span>]> { |
| <a href=#115 id=115 data-nosnippet>115</a> <span class="self">self</span>.span_stacks.iter().map(|stack| <span class="kw-2">*</span>stack.last().expect(<span class="string">"empty span stack"</span>)).collect() |
| <a href=#116 id=116 data-nosnippet>116</a> } |
| <a href=#117 id=117 data-nosnippet>117</a> |
| <a href=#118 id=118 data-nosnippet>118</a> <span class="doccomment">/// Converts the place to a name that can be inserted into source code. |
| <a href=#119 id=119 data-nosnippet>119</a> </span><span class="kw">pub fn </span>place_to_name(<span class="kw-2">&</span><span class="self">self</span>, owner: DefWithBodyId, db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase) -> String { |
| <a href=#120 id=120 data-nosnippet>120</a> <span class="kw">let </span>body = db.body(owner); |
| <a href=#121 id=121 data-nosnippet>121</a> <span class="kw">let </span><span class="kw-2">mut </span>result = body[<span class="self">self</span>.place.local].name.as_str().to_owned(); |
| <a href=#122 id=122 data-nosnippet>122</a> <span class="kw">for </span>proj <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.place.projections { |
| <a href=#123 id=123 data-nosnippet>123</a> <span class="kw">match </span>proj { |
| <a href=#124 id=124 data-nosnippet>124</a> ProjectionElem::Deref => {} |
| <a href=#125 id=125 data-nosnippet>125</a> ProjectionElem::Field(Either::Left(f)) => { |
| <a href=#126 id=126 data-nosnippet>126</a> <span class="kw">let </span>variant_data = f.parent.fields(db); |
| <a href=#127 id=127 data-nosnippet>127</a> <span class="kw">match </span>variant_data.shape { |
| <a href=#128 id=128 data-nosnippet>128</a> FieldsShape::Record => { |
| <a href=#129 id=129 data-nosnippet>129</a> result.push(<span class="string">'_'</span>); |
| <a href=#130 id=130 data-nosnippet>130</a> result.push_str(variant_data.fields()[f.local_id].name.as_str()) |
| <a href=#131 id=131 data-nosnippet>131</a> } |
| <a href=#132 id=132 data-nosnippet>132</a> FieldsShape::Tuple => { |
| <a href=#133 id=133 data-nosnippet>133</a> <span class="kw">let </span>index = |
| <a href=#134 id=134 data-nosnippet>134</a> variant_data.fields().iter().position(|it| it.<span class="number">0 </span>== f.local_id); |
| <a href=#135 id=135 data-nosnippet>135</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(index) = index { |
| <a href=#136 id=136 data-nosnippet>136</a> <span class="macro">format_to!</span>(result, <span class="string">"_{index}"</span>); |
| <a href=#137 id=137 data-nosnippet>137</a> } |
| <a href=#138 id=138 data-nosnippet>138</a> } |
| <a href=#139 id=139 data-nosnippet>139</a> FieldsShape::Unit => {} |
| <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> ProjectionElem::Field(Either::Right(f)) => <span class="macro">format_to!</span>(result, <span class="string">"_{}"</span>, f.index), |
| <a href=#143 id=143 data-nosnippet>143</a> <span class="kw-2">&</span>ProjectionElem::ClosureField(field) => <span class="macro">format_to!</span>(result, <span class="string">"_{field}"</span>), |
| <a href=#144 id=144 data-nosnippet>144</a> ProjectionElem::Index(<span class="kw">_</span>) |
| <a href=#145 id=145 data-nosnippet>145</a> | ProjectionElem::ConstantIndex { .. } |
| <a href=#146 id=146 data-nosnippet>146</a> | ProjectionElem::Subslice { .. } |
| <a href=#147 id=147 data-nosnippet>147</a> | ProjectionElem::OpaqueCast(<span class="kw">_</span>) => { |
| <a href=#148 id=148 data-nosnippet>148</a> <span class="macro">never!</span>(<span class="string">"Not happen in closure capture"</span>); |
| <a href=#149 id=149 data-nosnippet>149</a> <span class="kw">continue</span>; |
| <a href=#150 id=150 data-nosnippet>150</a> } |
| <a href=#151 id=151 data-nosnippet>151</a> } |
| <a href=#152 id=152 data-nosnippet>152</a> } |
| <a href=#153 id=153 data-nosnippet>153</a> <span class="kw">if </span>is_raw_identifier(<span class="kw-2">&</span>result, owner.module(db).krate(db).data(db).edition) { |
| <a href=#154 id=154 data-nosnippet>154</a> result.insert_str(<span class="number">0</span>, <span class="string">"r#"</span>); |
| <a href=#155 id=155 data-nosnippet>155</a> } |
| <a href=#156 id=156 data-nosnippet>156</a> result |
| <a href=#157 id=157 data-nosnippet>157</a> } |
| <a href=#158 id=158 data-nosnippet>158</a> |
| <a href=#159 id=159 data-nosnippet>159</a> <span class="kw">pub fn </span>display_place_source_code(<span class="kw-2">&</span><span class="self">self</span>, owner: DefWithBodyId, db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase) -> String { |
| <a href=#160 id=160 data-nosnippet>160</a> <span class="kw">let </span>body = db.body(owner); |
| <a href=#161 id=161 data-nosnippet>161</a> <span class="kw">let </span>krate = owner.krate(db); |
| <a href=#162 id=162 data-nosnippet>162</a> <span class="kw">let </span>edition = krate.data(db).edition; |
| <a href=#163 id=163 data-nosnippet>163</a> <span class="kw">let </span><span class="kw-2">mut </span>result = body[<span class="self">self</span>.place.local].name.display(db, edition).to_string(); |
| <a href=#164 id=164 data-nosnippet>164</a> <span class="kw">for </span>proj <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.place.projections { |
| <a href=#165 id=165 data-nosnippet>165</a> <span class="kw">match </span>proj { |
| <a href=#166 id=166 data-nosnippet>166</a> <span class="comment">// In source code autoderef kicks in. |
| <a href=#167 id=167 data-nosnippet>167</a> </span>ProjectionElem::Deref => {} |
| <a href=#168 id=168 data-nosnippet>168</a> ProjectionElem::Field(Either::Left(f)) => { |
| <a href=#169 id=169 data-nosnippet>169</a> <span class="kw">let </span>variant_data = f.parent.fields(db); |
| <a href=#170 id=170 data-nosnippet>170</a> <span class="kw">match </span>variant_data.shape { |
| <a href=#171 id=171 data-nosnippet>171</a> FieldsShape::Record => <span class="macro">format_to!</span>( |
| <a href=#172 id=172 data-nosnippet>172</a> result, |
| <a href=#173 id=173 data-nosnippet>173</a> <span class="string">".{}"</span>, |
| <a href=#174 id=174 data-nosnippet>174</a> variant_data.fields()[f.local_id].name.display(db, edition) |
| <a href=#175 id=175 data-nosnippet>175</a> ), |
| <a href=#176 id=176 data-nosnippet>176</a> FieldsShape::Tuple => <span class="macro">format_to!</span>( |
| <a href=#177 id=177 data-nosnippet>177</a> result, |
| <a href=#178 id=178 data-nosnippet>178</a> <span class="string">".{}"</span>, |
| <a href=#179 id=179 data-nosnippet>179</a> variant_data |
| <a href=#180 id=180 data-nosnippet>180</a> .fields() |
| <a href=#181 id=181 data-nosnippet>181</a> .iter() |
| <a href=#182 id=182 data-nosnippet>182</a> .position(|it| it.<span class="number">0 </span>== f.local_id) |
| <a href=#183 id=183 data-nosnippet>183</a> .unwrap_or_default() |
| <a href=#184 id=184 data-nosnippet>184</a> ), |
| <a href=#185 id=185 data-nosnippet>185</a> FieldsShape::Unit => {} |
| <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> ProjectionElem::Field(Either::Right(f)) => { |
| <a href=#189 id=189 data-nosnippet>189</a> <span class="kw">let </span>field = f.index; |
| <a href=#190 id=190 data-nosnippet>190</a> <span class="macro">format_to!</span>(result, <span class="string">".{field}"</span>); |
| <a href=#191 id=191 data-nosnippet>191</a> } |
| <a href=#192 id=192 data-nosnippet>192</a> <span class="kw-2">&</span>ProjectionElem::ClosureField(field) => { |
| <a href=#193 id=193 data-nosnippet>193</a> <span class="macro">format_to!</span>(result, <span class="string">".{field}"</span>); |
| <a href=#194 id=194 data-nosnippet>194</a> } |
| <a href=#195 id=195 data-nosnippet>195</a> ProjectionElem::Index(<span class="kw">_</span>) |
| <a href=#196 id=196 data-nosnippet>196</a> | ProjectionElem::ConstantIndex { .. } |
| <a href=#197 id=197 data-nosnippet>197</a> | ProjectionElem::Subslice { .. } |
| <a href=#198 id=198 data-nosnippet>198</a> | ProjectionElem::OpaqueCast(<span class="kw">_</span>) => { |
| <a href=#199 id=199 data-nosnippet>199</a> <span class="macro">never!</span>(<span class="string">"Not happen in closure capture"</span>); |
| <a href=#200 id=200 data-nosnippet>200</a> <span class="kw">continue</span>; |
| <a href=#201 id=201 data-nosnippet>201</a> } |
| <a href=#202 id=202 data-nosnippet>202</a> } |
| <a href=#203 id=203 data-nosnippet>203</a> } |
| <a href=#204 id=204 data-nosnippet>204</a> <span class="kw">let </span>final_derefs_count = <span class="self">self |
| <a href=#205 id=205 data-nosnippet>205</a> </span>.place |
| <a href=#206 id=206 data-nosnippet>206</a> .projections |
| <a href=#207 id=207 data-nosnippet>207</a> .iter() |
| <a href=#208 id=208 data-nosnippet>208</a> .rev() |
| <a href=#209 id=209 data-nosnippet>209</a> .take_while(|proj| <span class="macro">matches!</span>(proj, ProjectionElem::Deref)) |
| <a href=#210 id=210 data-nosnippet>210</a> .count(); |
| <a href=#211 id=211 data-nosnippet>211</a> result.insert_str(<span class="number">0</span>, <span class="kw-2">&</span><span class="string">"*"</span>.repeat(final_derefs_count)); |
| <a href=#212 id=212 data-nosnippet>212</a> result |
| <a href=#213 id=213 data-nosnippet>213</a> } |
| <a href=#214 id=214 data-nosnippet>214</a> |
| <a href=#215 id=215 data-nosnippet>215</a> <span class="kw">pub fn </span>display_place(<span class="kw-2">&</span><span class="self">self</span>, owner: DefWithBodyId, db: <span class="kw-2">&</span><span class="kw">dyn </span>HirDatabase) -> String { |
| <a href=#216 id=216 data-nosnippet>216</a> <span class="kw">let </span>body = db.body(owner); |
| <a href=#217 id=217 data-nosnippet>217</a> <span class="kw">let </span>krate = owner.krate(db); |
| <a href=#218 id=218 data-nosnippet>218</a> <span class="kw">let </span>edition = krate.data(db).edition; |
| <a href=#219 id=219 data-nosnippet>219</a> <span class="kw">let </span><span class="kw-2">mut </span>result = body[<span class="self">self</span>.place.local].name.display(db, edition).to_string(); |
| <a href=#220 id=220 data-nosnippet>220</a> <span class="kw">let </span><span class="kw-2">mut </span>field_need_paren = <span class="bool-val">false</span>; |
| <a href=#221 id=221 data-nosnippet>221</a> <span class="kw">for </span>proj <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.place.projections { |
| <a href=#222 id=222 data-nosnippet>222</a> <span class="kw">match </span>proj { |
| <a href=#223 id=223 data-nosnippet>223</a> ProjectionElem::Deref => { |
| <a href=#224 id=224 data-nosnippet>224</a> result = <span class="macro">format!</span>(<span class="string">"*{result}"</span>); |
| <a href=#225 id=225 data-nosnippet>225</a> field_need_paren = <span class="bool-val">true</span>; |
| <a href=#226 id=226 data-nosnippet>226</a> } |
| <a href=#227 id=227 data-nosnippet>227</a> ProjectionElem::Field(Either::Left(f)) => { |
| <a href=#228 id=228 data-nosnippet>228</a> <span class="kw">if </span>field_need_paren { |
| <a href=#229 id=229 data-nosnippet>229</a> result = <span class="macro">format!</span>(<span class="string">"({result})"</span>); |
| <a href=#230 id=230 data-nosnippet>230</a> } |
| <a href=#231 id=231 data-nosnippet>231</a> <span class="kw">let </span>variant_data = f.parent.fields(db); |
| <a href=#232 id=232 data-nosnippet>232</a> <span class="kw">let </span>field = <span class="kw">match </span>variant_data.shape { |
| <a href=#233 id=233 data-nosnippet>233</a> FieldsShape::Record => { |
| <a href=#234 id=234 data-nosnippet>234</a> variant_data.fields()[f.local_id].name.as_str().to_owned() |
| <a href=#235 id=235 data-nosnippet>235</a> } |
| <a href=#236 id=236 data-nosnippet>236</a> FieldsShape::Tuple => variant_data |
| <a href=#237 id=237 data-nosnippet>237</a> .fields() |
| <a href=#238 id=238 data-nosnippet>238</a> .iter() |
| <a href=#239 id=239 data-nosnippet>239</a> .position(|it| it.<span class="number">0 </span>== f.local_id) |
| <a href=#240 id=240 data-nosnippet>240</a> .unwrap_or_default() |
| <a href=#241 id=241 data-nosnippet>241</a> .to_string(), |
| <a href=#242 id=242 data-nosnippet>242</a> FieldsShape::Unit => <span class="string">"[missing field]"</span>.to_owned(), |
| <a href=#243 id=243 data-nosnippet>243</a> }; |
| <a href=#244 id=244 data-nosnippet>244</a> result = <span class="macro">format!</span>(<span class="string">"{result}.{field}"</span>); |
| <a href=#245 id=245 data-nosnippet>245</a> field_need_paren = <span class="bool-val">false</span>; |
| <a href=#246 id=246 data-nosnippet>246</a> } |
| <a href=#247 id=247 data-nosnippet>247</a> ProjectionElem::Field(Either::Right(f)) => { |
| <a href=#248 id=248 data-nosnippet>248</a> <span class="kw">let </span>field = f.index; |
| <a href=#249 id=249 data-nosnippet>249</a> <span class="kw">if </span>field_need_paren { |
| <a href=#250 id=250 data-nosnippet>250</a> result = <span class="macro">format!</span>(<span class="string">"({result})"</span>); |
| <a href=#251 id=251 data-nosnippet>251</a> } |
| <a href=#252 id=252 data-nosnippet>252</a> result = <span class="macro">format!</span>(<span class="string">"{result}.{field}"</span>); |
| <a href=#253 id=253 data-nosnippet>253</a> field_need_paren = <span class="bool-val">false</span>; |
| <a href=#254 id=254 data-nosnippet>254</a> } |
| <a href=#255 id=255 data-nosnippet>255</a> <span class="kw-2">&</span>ProjectionElem::ClosureField(field) => { |
| <a href=#256 id=256 data-nosnippet>256</a> <span class="kw">if </span>field_need_paren { |
| <a href=#257 id=257 data-nosnippet>257</a> result = <span class="macro">format!</span>(<span class="string">"({result})"</span>); |
| <a href=#258 id=258 data-nosnippet>258</a> } |
| <a href=#259 id=259 data-nosnippet>259</a> result = <span class="macro">format!</span>(<span class="string">"{result}.{field}"</span>); |
| <a href=#260 id=260 data-nosnippet>260</a> field_need_paren = <span class="bool-val">false</span>; |
| <a href=#261 id=261 data-nosnippet>261</a> } |
| <a href=#262 id=262 data-nosnippet>262</a> ProjectionElem::Index(<span class="kw">_</span>) |
| <a href=#263 id=263 data-nosnippet>263</a> | ProjectionElem::ConstantIndex { .. } |
| <a href=#264 id=264 data-nosnippet>264</a> | ProjectionElem::Subslice { .. } |
| <a href=#265 id=265 data-nosnippet>265</a> | ProjectionElem::OpaqueCast(<span class="kw">_</span>) => { |
| <a href=#266 id=266 data-nosnippet>266</a> <span class="macro">never!</span>(<span class="string">"Not happen in closure capture"</span>); |
| <a href=#267 id=267 data-nosnippet>267</a> <span class="kw">continue</span>; |
| <a href=#268 id=268 data-nosnippet>268</a> } |
| <a href=#269 id=269 data-nosnippet>269</a> } |
| <a href=#270 id=270 data-nosnippet>270</a> } |
| <a href=#271 id=271 data-nosnippet>271</a> result |
| <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> |
| <a href=#275 id=275 data-nosnippet>275</a><span class="attr">#[derive(Debug, Clone, PartialEq, Eq)] |
| <a href=#276 id=276 data-nosnippet>276</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>CapturedItemWithoutTy<<span class="lifetime">'db</span>> { |
| <a href=#277 id=277 data-nosnippet>277</a> <span class="kw">pub</span>(<span class="kw">crate</span>) place: HirPlace<<span class="lifetime">'db</span>>, |
| <a href=#278 id=278 data-nosnippet>278</a> <span class="kw">pub</span>(<span class="kw">crate</span>) kind: CaptureKind, |
| <a href=#279 id=279 data-nosnippet>279</a> <span class="doccomment">/// The inner vec is the stacks; the outer vec is for each capture reference. |
| <a href=#280 id=280 data-nosnippet>280</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) span_stacks: SmallVec<[SmallVec<[MirSpan; <span class="number">3</span>]>; <span class="number">3</span>]>, |
| <a href=#281 id=281 data-nosnippet>281</a>} |
| <a href=#282 id=282 data-nosnippet>282</a> |
| <a href=#283 id=283 data-nosnippet>283</a><span class="kw">impl</span><<span class="lifetime">'db</span>> CapturedItemWithoutTy<<span class="lifetime">'db</span>> { |
| <a href=#284 id=284 data-nosnippet>284</a> <span class="kw">fn </span>with_ty(<span class="self">self</span>, ctx: <span class="kw-2">&mut </span>InferenceContext<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>) -> CapturedItem<<span class="lifetime">'db</span>> { |
| <a href=#285 id=285 data-nosnippet>285</a> <span class="kw">let </span>ty = <span class="self">self</span>.place.ty(ctx); |
| <a href=#286 id=286 data-nosnippet>286</a> <span class="kw">let </span>ty = <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.kind { |
| <a href=#287 id=287 data-nosnippet>287</a> CaptureKind::ByValue => ty, |
| <a href=#288 id=288 data-nosnippet>288</a> CaptureKind::ByRef(bk) => { |
| <a href=#289 id=289 data-nosnippet>289</a> <span class="kw">let </span>m = <span class="kw">match </span>bk { |
| <a href=#290 id=290 data-nosnippet>290</a> BorrowKind::Mut { .. } => Mutability::Mut, |
| <a href=#291 id=291 data-nosnippet>291</a> <span class="kw">_ </span>=> Mutability::Not, |
| <a href=#292 id=292 data-nosnippet>292</a> }; |
| <a href=#293 id=293 data-nosnippet>293</a> Ty::new_ref(ctx.interner(), ctx.types.re_error, ty, m) |
| <a href=#294 id=294 data-nosnippet>294</a> } |
| <a href=#295 id=295 data-nosnippet>295</a> }; |
| <a href=#296 id=296 data-nosnippet>296</a> CapturedItem { |
| <a href=#297 id=297 data-nosnippet>297</a> place: <span class="self">self</span>.place, |
| <a href=#298 id=298 data-nosnippet>298</a> kind: <span class="self">self</span>.kind, |
| <a href=#299 id=299 data-nosnippet>299</a> span_stacks: <span class="self">self</span>.span_stacks, |
| <a href=#300 id=300 data-nosnippet>300</a> ty: EarlyBinder::bind(ty), |
| <a href=#301 id=301 data-nosnippet>301</a> } |
| <a href=#302 id=302 data-nosnippet>302</a> } |
| <a href=#303 id=303 data-nosnippet>303</a>} |
| <a href=#304 id=304 data-nosnippet>304</a> |
| <a href=#305 id=305 data-nosnippet>305</a><span class="kw">impl</span><<span class="lifetime">'db</span>> InferenceContext<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>> { |
| <a href=#306 id=306 data-nosnippet>306</a> <span class="kw">fn </span>place_of_expr(<span class="kw-2">&mut </span><span class="self">self</span>, tgt_expr: ExprId) -> <span class="prelude-ty">Option</span><HirPlace<<span class="lifetime">'db</span>>> { |
| <a href=#307 id=307 data-nosnippet>307</a> <span class="kw">let </span>r = <span class="self">self</span>.place_of_expr_without_adjust(tgt_expr)<span class="question-mark">?</span>; |
| <a href=#308 id=308 data-nosnippet>308</a> <span class="kw">let </span>adjustments = |
| <a href=#309 id=309 data-nosnippet>309</a> <span class="self">self</span>.result.expr_adjustments.get(<span class="kw-2">&</span>tgt_expr).map(|it| <span class="kw-2">&**</span>it).unwrap_or_default(); |
| <a href=#310 id=310 data-nosnippet>310</a> apply_adjusts_to_place(<span class="kw-2">&mut </span><span class="self">self</span>.current_capture_span_stack, r, adjustments) |
| <a href=#311 id=311 data-nosnippet>311</a> } |
| <a href=#312 id=312 data-nosnippet>312</a> |
| <a href=#313 id=313 data-nosnippet>313</a> <span class="doccomment">/// Pushes the span into `current_capture_span_stack`, *without clearing it first*. |
| <a href=#314 id=314 data-nosnippet>314</a> </span><span class="kw">fn </span>path_place(<span class="kw-2">&mut </span><span class="self">self</span>, path: <span class="kw-2">&</span>Path, id: ExprOrPatId) -> <span class="prelude-ty">Option</span><HirPlace<<span class="lifetime">'db</span>>> { |
| <a href=#315 id=315 data-nosnippet>315</a> <span class="kw">if </span>path.type_anchor().is_some() { |
| <a href=#316 id=316 data-nosnippet>316</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#317 id=317 data-nosnippet>317</a> } |
| <a href=#318 id=318 data-nosnippet>318</a> <span class="kw">let </span>hygiene = <span class="self">self</span>.body.expr_or_pat_path_hygiene(id); |
| <a href=#319 id=319 data-nosnippet>319</a> <span class="self">self</span>.resolver.resolve_path_in_value_ns_fully(<span class="self">self</span>.db, path, hygiene).and_then(|result| { |
| <a href=#320 id=320 data-nosnippet>320</a> <span class="kw">match </span>result { |
| <a href=#321 id=321 data-nosnippet>321</a> ValueNs::LocalBinding(binding) => { |
| <a href=#322 id=322 data-nosnippet>322</a> <span class="kw">let </span>mir_span = <span class="kw">match </span>id { |
| <a href=#323 id=323 data-nosnippet>323</a> ExprOrPatId::ExprId(id) => MirSpan::ExprId(id), |
| <a href=#324 id=324 data-nosnippet>324</a> ExprOrPatId::PatId(id) => MirSpan::PatId(id), |
| <a href=#325 id=325 data-nosnippet>325</a> }; |
| <a href=#326 id=326 data-nosnippet>326</a> <span class="self">self</span>.current_capture_span_stack.push(mir_span); |
| <a href=#327 id=327 data-nosnippet>327</a> <span class="prelude-val">Some</span>(HirPlace { local: binding, projections: Vec::new() }) |
| <a href=#328 id=328 data-nosnippet>328</a> } |
| <a href=#329 id=329 data-nosnippet>329</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#330 id=330 data-nosnippet>330</a> } |
| <a href=#331 id=331 data-nosnippet>331</a> }) |
| <a href=#332 id=332 data-nosnippet>332</a> } |
| <a href=#333 id=333 data-nosnippet>333</a> |
| <a href=#334 id=334 data-nosnippet>334</a> <span class="doccomment">/// Changes `current_capture_span_stack` to contain the stack of spans for this expr. |
| <a href=#335 id=335 data-nosnippet>335</a> </span><span class="kw">fn </span>place_of_expr_without_adjust(<span class="kw-2">&mut </span><span class="self">self</span>, tgt_expr: ExprId) -> <span class="prelude-ty">Option</span><HirPlace<<span class="lifetime">'db</span>>> { |
| <a href=#336 id=336 data-nosnippet>336</a> <span class="self">self</span>.current_capture_span_stack.clear(); |
| <a href=#337 id=337 data-nosnippet>337</a> <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.body[tgt_expr] { |
| <a href=#338 id=338 data-nosnippet>338</a> Expr::Path(p) => { |
| <a href=#339 id=339 data-nosnippet>339</a> <span class="kw">let </span>resolver_guard = |
| <a href=#340 id=340 data-nosnippet>340</a> <span class="self">self</span>.resolver.update_to_inner_scope(<span class="self">self</span>.db, <span class="self">self</span>.owner, tgt_expr); |
| <a href=#341 id=341 data-nosnippet>341</a> <span class="kw">let </span>result = <span class="self">self</span>.path_place(p, tgt_expr.into()); |
| <a href=#342 id=342 data-nosnippet>342</a> <span class="self">self</span>.resolver.reset_to_guard(resolver_guard); |
| <a href=#343 id=343 data-nosnippet>343</a> <span class="kw">return </span>result; |
| <a href=#344 id=344 data-nosnippet>344</a> } |
| <a href=#345 id=345 data-nosnippet>345</a> Expr::Field { expr, name: <span class="kw">_ </span>} => { |
| <a href=#346 id=346 data-nosnippet>346</a> <span class="kw">let </span><span class="kw-2">mut </span>place = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>expr)<span class="question-mark">?</span>; |
| <a href=#347 id=347 data-nosnippet>347</a> <span class="kw">let </span>field = <span class="self">self</span>.result.field_resolution(tgt_expr)<span class="question-mark">?</span>; |
| <a href=#348 id=348 data-nosnippet>348</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::ExprId(tgt_expr)); |
| <a href=#349 id=349 data-nosnippet>349</a> place.projections.push(ProjectionElem::Field(field)); |
| <a href=#350 id=350 data-nosnippet>350</a> <span class="kw">return </span><span class="prelude-val">Some</span>(place); |
| <a href=#351 id=351 data-nosnippet>351</a> } |
| <a href=#352 id=352 data-nosnippet>352</a> Expr::UnaryOp { expr, op: UnaryOp::Deref } => { |
| <a href=#353 id=353 data-nosnippet>353</a> <span class="kw">let </span>is_builtin_deref = <span class="kw">match </span><span class="self">self</span>.expr_ty(<span class="kw-2">*</span>expr).kind() { |
| <a href=#354 id=354 data-nosnippet>354</a> TyKind::Ref(..) | TyKind::RawPtr(..) => <span class="bool-val">true</span>, |
| <a href=#355 id=355 data-nosnippet>355</a> TyKind::Adt(adt_def, <span class="kw">_</span>) <span class="kw">if </span>adt_def.is_box() => <span class="bool-val">true</span>, |
| <a href=#356 id=356 data-nosnippet>356</a> <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| <a href=#357 id=357 data-nosnippet>357</a> }; |
| <a href=#358 id=358 data-nosnippet>358</a> <span class="kw">if </span>is_builtin_deref { |
| <a href=#359 id=359 data-nosnippet>359</a> <span class="kw">let </span><span class="kw-2">mut </span>place = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>expr)<span class="question-mark">?</span>; |
| <a href=#360 id=360 data-nosnippet>360</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::ExprId(tgt_expr)); |
| <a href=#361 id=361 data-nosnippet>361</a> place.projections.push(ProjectionElem::Deref); |
| <a href=#362 id=362 data-nosnippet>362</a> <span class="kw">return </span><span class="prelude-val">Some</span>(place); |
| <a href=#363 id=363 data-nosnippet>363</a> } |
| <a href=#364 id=364 data-nosnippet>364</a> } |
| <a href=#365 id=365 data-nosnippet>365</a> <span class="kw">_ </span>=> (), |
| <a href=#366 id=366 data-nosnippet>366</a> } |
| <a href=#367 id=367 data-nosnippet>367</a> <span class="prelude-val">None |
| <a href=#368 id=368 data-nosnippet>368</a> </span>} |
| <a href=#369 id=369 data-nosnippet>369</a> |
| <a href=#370 id=370 data-nosnippet>370</a> <span class="kw">fn </span>push_capture(<span class="kw-2">&mut </span><span class="self">self</span>, place: HirPlace<<span class="lifetime">'db</span>>, kind: CaptureKind) { |
| <a href=#371 id=371 data-nosnippet>371</a> <span class="self">self</span>.current_captures.push(CapturedItemWithoutTy { |
| <a href=#372 id=372 data-nosnippet>372</a> place, |
| <a href=#373 id=373 data-nosnippet>373</a> kind, |
| <a href=#374 id=374 data-nosnippet>374</a> span_stacks: <span class="macro">smallvec!</span>[<span class="self">self</span>.current_capture_span_stack.iter().copied().collect()], |
| <a href=#375 id=375 data-nosnippet>375</a> }); |
| <a href=#376 id=376 data-nosnippet>376</a> } |
| <a href=#377 id=377 data-nosnippet>377</a> |
| <a href=#378 id=378 data-nosnippet>378</a> <span class="kw">fn </span>truncate_capture_spans( |
| <a href=#379 id=379 data-nosnippet>379</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#380 id=380 data-nosnippet>380</a> capture: <span class="kw-2">&mut </span>CapturedItemWithoutTy<<span class="lifetime">'db</span>>, |
| <a href=#381 id=381 data-nosnippet>381</a> <span class="kw-2">mut </span>truncate_to: usize, |
| <a href=#382 id=382 data-nosnippet>382</a> ) { |
| <a href=#383 id=383 data-nosnippet>383</a> <span class="comment">// The first span is the identifier, and it must always remain. |
| <a href=#384 id=384 data-nosnippet>384</a> </span>truncate_to += <span class="number">1</span>; |
| <a href=#385 id=385 data-nosnippet>385</a> <span class="kw">for </span>span_stack <span class="kw">in </span><span class="kw-2">&mut </span>capture.span_stacks { |
| <a href=#386 id=386 data-nosnippet>386</a> <span class="kw">let </span><span class="kw-2">mut </span>remained = truncate_to; |
| <a href=#387 id=387 data-nosnippet>387</a> <span class="kw">let </span><span class="kw-2">mut </span>actual_truncate_to = <span class="number">0</span>; |
| <a href=#388 id=388 data-nosnippet>388</a> <span class="kw">for </span><span class="kw-2">&</span>span <span class="kw">in </span><span class="kw-2">&*</span>span_stack { |
| <a href=#389 id=389 data-nosnippet>389</a> actual_truncate_to += <span class="number">1</span>; |
| <a href=#390 id=390 data-nosnippet>390</a> <span class="kw">if </span>!span.is_ref_span(<span class="self">self</span>.body) { |
| <a href=#391 id=391 data-nosnippet>391</a> remained -= <span class="number">1</span>; |
| <a href=#392 id=392 data-nosnippet>392</a> <span class="kw">if </span>remained == <span class="number">0 </span>{ |
| <a href=#393 id=393 data-nosnippet>393</a> <span class="kw">break</span>; |
| <a href=#394 id=394 data-nosnippet>394</a> } |
| <a href=#395 id=395 data-nosnippet>395</a> } |
| <a href=#396 id=396 data-nosnippet>396</a> } |
| <a href=#397 id=397 data-nosnippet>397</a> <span class="kw">if </span>actual_truncate_to < span_stack.len() |
| <a href=#398 id=398 data-nosnippet>398</a> && span_stack[actual_truncate_to].is_ref_span(<span class="self">self</span>.body) |
| <a href=#399 id=399 data-nosnippet>399</a> { |
| <a href=#400 id=400 data-nosnippet>400</a> <span class="comment">// Include the ref operator if there is one, we will fix it later (in `strip_captures_ref_span()`) if it's incorrect. |
| <a href=#401 id=401 data-nosnippet>401</a> </span>actual_truncate_to += <span class="number">1</span>; |
| <a href=#402 id=402 data-nosnippet>402</a> } |
| <a href=#403 id=403 data-nosnippet>403</a> span_stack.truncate(actual_truncate_to); |
| <a href=#404 id=404 data-nosnippet>404</a> } |
| <a href=#405 id=405 data-nosnippet>405</a> } |
| <a href=#406 id=406 data-nosnippet>406</a> |
| <a href=#407 id=407 data-nosnippet>407</a> <span class="kw">fn </span>ref_expr(<span class="kw-2">&mut </span><span class="self">self</span>, expr: ExprId, place: <span class="prelude-ty">Option</span><HirPlace<<span class="lifetime">'db</span>>>) { |
| <a href=#408 id=408 data-nosnippet>408</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = place { |
| <a href=#409 id=409 data-nosnippet>409</a> <span class="self">self</span>.add_capture(place, CaptureKind::ByRef(BorrowKind::Shared)); |
| <a href=#410 id=410 data-nosnippet>410</a> } |
| <a href=#411 id=411 data-nosnippet>411</a> <span class="self">self</span>.walk_expr(expr); |
| <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">fn </span>add_capture(<span class="kw-2">&mut </span><span class="self">self</span>, place: HirPlace<<span class="lifetime">'db</span>>, kind: CaptureKind) { |
| <a href=#415 id=415 data-nosnippet>415</a> <span class="kw">if </span><span class="self">self</span>.is_upvar(<span class="kw-2">&</span>place) { |
| <a href=#416 id=416 data-nosnippet>416</a> <span class="self">self</span>.push_capture(place, kind); |
| <a href=#417 id=417 data-nosnippet>417</a> } |
| <a href=#418 id=418 data-nosnippet>418</a> } |
| <a href=#419 id=419 data-nosnippet>419</a> |
| <a href=#420 id=420 data-nosnippet>420</a> <span class="kw">fn </span>mutate_path_pat(<span class="kw-2">&mut </span><span class="self">self</span>, path: <span class="kw-2">&</span>Path, id: PatId) { |
| <a href=#421 id=421 data-nosnippet>421</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = <span class="self">self</span>.path_place(path, id.into()) { |
| <a href=#422 id=422 data-nosnippet>422</a> <span class="self">self</span>.add_capture( |
| <a href=#423 id=423 data-nosnippet>423</a> place, |
| <a href=#424 id=424 data-nosnippet>424</a> CaptureKind::ByRef(BorrowKind::Mut { kind: MutBorrowKind::Default }), |
| <a href=#425 id=425 data-nosnippet>425</a> ); |
| <a href=#426 id=426 data-nosnippet>426</a> <span class="self">self</span>.current_capture_span_stack.pop(); <span class="comment">// Remove the pattern span. |
| <a href=#427 id=427 data-nosnippet>427</a> </span>} |
| <a href=#428 id=428 data-nosnippet>428</a> } |
| <a href=#429 id=429 data-nosnippet>429</a> |
| <a href=#430 id=430 data-nosnippet>430</a> <span class="kw">fn </span>mutate_expr(<span class="kw-2">&mut </span><span class="self">self</span>, expr: ExprId, place: <span class="prelude-ty">Option</span><HirPlace<<span class="lifetime">'db</span>>>) { |
| <a href=#431 id=431 data-nosnippet>431</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = place { |
| <a href=#432 id=432 data-nosnippet>432</a> <span class="self">self</span>.add_capture( |
| <a href=#433 id=433 data-nosnippet>433</a> place, |
| <a href=#434 id=434 data-nosnippet>434</a> CaptureKind::ByRef(BorrowKind::Mut { kind: MutBorrowKind::Default }), |
| <a href=#435 id=435 data-nosnippet>435</a> ); |
| <a href=#436 id=436 data-nosnippet>436</a> } |
| <a href=#437 id=437 data-nosnippet>437</a> <span class="self">self</span>.walk_expr(expr); |
| <a href=#438 id=438 data-nosnippet>438</a> } |
| <a href=#439 id=439 data-nosnippet>439</a> |
| <a href=#440 id=440 data-nosnippet>440</a> <span class="kw">fn </span>consume_expr(<span class="kw-2">&mut </span><span class="self">self</span>, expr: ExprId) { |
| <a href=#441 id=441 data-nosnippet>441</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = <span class="self">self</span>.place_of_expr(expr) { |
| <a href=#442 id=442 data-nosnippet>442</a> <span class="self">self</span>.consume_place(place); |
| <a href=#443 id=443 data-nosnippet>443</a> } |
| <a href=#444 id=444 data-nosnippet>444</a> <span class="self">self</span>.walk_expr(expr); |
| <a href=#445 id=445 data-nosnippet>445</a> } |
| <a href=#446 id=446 data-nosnippet>446</a> |
| <a href=#447 id=447 data-nosnippet>447</a> <span class="kw">fn </span>consume_place(<span class="kw-2">&mut </span><span class="self">self</span>, place: HirPlace<<span class="lifetime">'db</span>>) { |
| <a href=#448 id=448 data-nosnippet>448</a> <span class="kw">if </span><span class="self">self</span>.is_upvar(<span class="kw-2">&</span>place) { |
| <a href=#449 id=449 data-nosnippet>449</a> <span class="kw">let </span>ty = place.ty(<span class="self">self</span>); |
| <a href=#450 id=450 data-nosnippet>450</a> <span class="kw">let </span>kind = <span class="kw">if </span><span class="self">self</span>.is_ty_copy(ty) { |
| <a href=#451 id=451 data-nosnippet>451</a> CaptureKind::ByRef(BorrowKind::Shared) |
| <a href=#452 id=452 data-nosnippet>452</a> } <span class="kw">else </span>{ |
| <a href=#453 id=453 data-nosnippet>453</a> CaptureKind::ByValue |
| <a href=#454 id=454 data-nosnippet>454</a> }; |
| <a href=#455 id=455 data-nosnippet>455</a> <span class="self">self</span>.push_capture(place, kind); |
| <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> <span class="kw">fn </span>walk_expr_with_adjust(<span class="kw-2">&mut </span><span class="self">self</span>, tgt_expr: ExprId, adjustment: <span class="kw-2">&</span>[Adjustment<<span class="lifetime">'db</span>>]) { |
| <a href=#460 id=460 data-nosnippet>460</a> <span class="kw">if let </span><span class="prelude-val">Some</span>((last, rest)) = adjustment.split_last() { |
| <a href=#461 id=461 data-nosnippet>461</a> <span class="kw">match </span><span class="kw-2">&</span>last.kind { |
| <a href=#462 id=462 data-nosnippet>462</a> Adjust::NeverToAny | Adjust::Deref(<span class="prelude-val">None</span>) | Adjust::Pointer(<span class="kw">_</span>) => { |
| <a href=#463 id=463 data-nosnippet>463</a> <span class="self">self</span>.walk_expr_with_adjust(tgt_expr, rest) |
| <a href=#464 id=464 data-nosnippet>464</a> } |
| <a href=#465 id=465 data-nosnippet>465</a> Adjust::Deref(<span class="prelude-val">Some</span>(m)) => <span class="kw">match </span>m.<span class="number">0 </span>{ |
| <a href=#466 id=466 data-nosnippet>466</a> <span class="prelude-val">Some</span>(m) => { |
| <a href=#467 id=467 data-nosnippet>467</a> <span class="self">self</span>.ref_capture_with_adjusts(m, tgt_expr, rest); |
| <a href=#468 id=468 data-nosnippet>468</a> } |
| <a href=#469 id=469 data-nosnippet>469</a> <span class="prelude-val">None </span>=> <span class="macro">unreachable!</span>(), |
| <a href=#470 id=470 data-nosnippet>470</a> }, |
| <a href=#471 id=471 data-nosnippet>471</a> Adjust::Borrow(b) => { |
| <a href=#472 id=472 data-nosnippet>472</a> <span class="self">self</span>.ref_capture_with_adjusts(b.mutability(), tgt_expr, rest); |
| <a href=#473 id=473 data-nosnippet>473</a> } |
| <a href=#474 id=474 data-nosnippet>474</a> } |
| <a href=#475 id=475 data-nosnippet>475</a> } <span class="kw">else </span>{ |
| <a href=#476 id=476 data-nosnippet>476</a> <span class="self">self</span>.walk_expr_without_adjust(tgt_expr); |
| <a href=#477 id=477 data-nosnippet>477</a> } |
| <a href=#478 id=478 data-nosnippet>478</a> } |
| <a href=#479 id=479 data-nosnippet>479</a> |
| <a href=#480 id=480 data-nosnippet>480</a> <span class="kw">fn </span>ref_capture_with_adjusts( |
| <a href=#481 id=481 data-nosnippet>481</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#482 id=482 data-nosnippet>482</a> m: Mutability, |
| <a href=#483 id=483 data-nosnippet>483</a> tgt_expr: ExprId, |
| <a href=#484 id=484 data-nosnippet>484</a> rest: <span class="kw-2">&</span>[Adjustment<<span class="lifetime">'db</span>>], |
| <a href=#485 id=485 data-nosnippet>485</a> ) { |
| <a href=#486 id=486 data-nosnippet>486</a> <span class="kw">let </span>capture_kind = <span class="kw">match </span>m { |
| <a href=#487 id=487 data-nosnippet>487</a> Mutability::Mut => CaptureKind::ByRef(BorrowKind::Mut { kind: MutBorrowKind::Default }), |
| <a href=#488 id=488 data-nosnippet>488</a> Mutability::Not => CaptureKind::ByRef(BorrowKind::Shared), |
| <a href=#489 id=489 data-nosnippet>489</a> }; |
| <a href=#490 id=490 data-nosnippet>490</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = <span class="self">self</span>.place_of_expr_without_adjust(tgt_expr) |
| <a href=#491 id=491 data-nosnippet>491</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(place) = |
| <a href=#492 id=492 data-nosnippet>492</a> apply_adjusts_to_place(<span class="kw-2">&mut </span><span class="self">self</span>.current_capture_span_stack, place, rest) |
| <a href=#493 id=493 data-nosnippet>493</a> { |
| <a href=#494 id=494 data-nosnippet>494</a> <span class="self">self</span>.add_capture(place, capture_kind); |
| <a href=#495 id=495 data-nosnippet>495</a> } |
| <a href=#496 id=496 data-nosnippet>496</a> <span class="self">self</span>.walk_expr_with_adjust(tgt_expr, rest); |
| <a href=#497 id=497 data-nosnippet>497</a> } |
| <a href=#498 id=498 data-nosnippet>498</a> |
| <a href=#499 id=499 data-nosnippet>499</a> <span class="kw">fn </span>walk_expr(<span class="kw-2">&mut </span><span class="self">self</span>, tgt_expr: ExprId) { |
| <a href=#500 id=500 data-nosnippet>500</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(it) = <span class="self">self</span>.result.expr_adjustments.get_mut(<span class="kw-2">&</span>tgt_expr) { |
| <a href=#501 id=501 data-nosnippet>501</a> <span class="comment">// FIXME: this take is completely unneeded, and just is here to make borrow checker |
| <a href=#502 id=502 data-nosnippet>502</a> // happy. Remove it if you can. |
| <a href=#503 id=503 data-nosnippet>503</a> </span><span class="kw">let </span>x_taken = mem::take(it); |
| <a href=#504 id=504 data-nosnippet>504</a> <span class="self">self</span>.walk_expr_with_adjust(tgt_expr, <span class="kw-2">&</span>x_taken); |
| <a href=#505 id=505 data-nosnippet>505</a> <span class="kw-2">*</span><span class="self">self</span>.result.expr_adjustments.get_mut(<span class="kw-2">&</span>tgt_expr).unwrap() = x_taken; |
| <a href=#506 id=506 data-nosnippet>506</a> } <span class="kw">else </span>{ |
| <a href=#507 id=507 data-nosnippet>507</a> <span class="self">self</span>.walk_expr_without_adjust(tgt_expr); |
| <a href=#508 id=508 data-nosnippet>508</a> } |
| <a href=#509 id=509 data-nosnippet>509</a> } |
| <a href=#510 id=510 data-nosnippet>510</a> |
| <a href=#511 id=511 data-nosnippet>511</a> <span class="kw">fn </span>walk_expr_without_adjust(<span class="kw-2">&mut </span><span class="self">self</span>, tgt_expr: ExprId) { |
| <a href=#512 id=512 data-nosnippet>512</a> <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.body[tgt_expr] { |
| <a href=#513 id=513 data-nosnippet>513</a> Expr::OffsetOf(<span class="kw">_</span>) => (), |
| <a href=#514 id=514 data-nosnippet>514</a> Expr::InlineAsm(e) => e.operands.iter().for_each(|(<span class="kw">_</span>, op)| <span class="kw">match </span>op { |
| <a href=#515 id=515 data-nosnippet>515</a> AsmOperand::In { expr, .. } |
| <a href=#516 id=516 data-nosnippet>516</a> | AsmOperand::Out { expr: <span class="prelude-val">Some</span>(expr), .. } |
| <a href=#517 id=517 data-nosnippet>517</a> | AsmOperand::InOut { expr, .. } => <span class="self">self</span>.walk_expr_without_adjust(<span class="kw-2">*</span>expr), |
| <a href=#518 id=518 data-nosnippet>518</a> AsmOperand::SplitInOut { in_expr, out_expr, .. } => { |
| <a href=#519 id=519 data-nosnippet>519</a> <span class="self">self</span>.walk_expr_without_adjust(<span class="kw-2">*</span>in_expr); |
| <a href=#520 id=520 data-nosnippet>520</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(out_expr) = out_expr { |
| <a href=#521 id=521 data-nosnippet>521</a> <span class="self">self</span>.walk_expr_without_adjust(<span class="kw-2">*</span>out_expr); |
| <a href=#522 id=522 data-nosnippet>522</a> } |
| <a href=#523 id=523 data-nosnippet>523</a> } |
| <a href=#524 id=524 data-nosnippet>524</a> AsmOperand::Out { expr: <span class="prelude-val">None</span>, .. } |
| <a href=#525 id=525 data-nosnippet>525</a> | AsmOperand::Const(<span class="kw">_</span>) |
| <a href=#526 id=526 data-nosnippet>526</a> | AsmOperand::Label(<span class="kw">_</span>) |
| <a href=#527 id=527 data-nosnippet>527</a> | AsmOperand::Sym(<span class="kw">_</span>) => (), |
| <a href=#528 id=528 data-nosnippet>528</a> }), |
| <a href=#529 id=529 data-nosnippet>529</a> Expr::If { condition, then_branch, else_branch } => { |
| <a href=#530 id=530 data-nosnippet>530</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>condition); |
| <a href=#531 id=531 data-nosnippet>531</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>then_branch); |
| <a href=#532 id=532 data-nosnippet>532</a> <span class="kw">if let </span><span class="kw-2">&</span><span class="prelude-val">Some</span>(expr) = else_branch { |
| <a href=#533 id=533 data-nosnippet>533</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#534 id=534 data-nosnippet>534</a> } |
| <a href=#535 id=535 data-nosnippet>535</a> } |
| <a href=#536 id=536 data-nosnippet>536</a> Expr::Async { statements, tail, .. } |
| <a href=#537 id=537 data-nosnippet>537</a> | Expr::Unsafe { statements, tail, .. } |
| <a href=#538 id=538 data-nosnippet>538</a> | Expr::Block { statements, tail, .. } => { |
| <a href=#539 id=539 data-nosnippet>539</a> <span class="kw">for </span>s <span class="kw">in </span>statements.iter() { |
| <a href=#540 id=540 data-nosnippet>540</a> <span class="kw">match </span>s { |
| <a href=#541 id=541 data-nosnippet>541</a> Statement::Let { pat, type_ref: <span class="kw">_</span>, initializer, else_branch } => { |
| <a href=#542 id=542 data-nosnippet>542</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(else_branch) = else_branch { |
| <a href=#543 id=543 data-nosnippet>543</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>else_branch); |
| <a href=#544 id=544 data-nosnippet>544</a> } |
| <a href=#545 id=545 data-nosnippet>545</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(initializer) = initializer { |
| <a href=#546 id=546 data-nosnippet>546</a> <span class="kw">if </span>else_branch.is_some() { |
| <a href=#547 id=547 data-nosnippet>547</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>initializer); |
| <a href=#548 id=548 data-nosnippet>548</a> } <span class="kw">else </span>{ |
| <a href=#549 id=549 data-nosnippet>549</a> <span class="self">self</span>.walk_expr(<span class="kw-2">*</span>initializer); |
| <a href=#550 id=550 data-nosnippet>550</a> } |
| <a href=#551 id=551 data-nosnippet>551</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>initializer) { |
| <a href=#552 id=552 data-nosnippet>552</a> <span class="self">self</span>.consume_with_pat(place, <span class="kw-2">*</span>pat); |
| <a href=#553 id=553 data-nosnippet>553</a> } |
| <a href=#554 id=554 data-nosnippet>554</a> } |
| <a href=#555 id=555 data-nosnippet>555</a> } |
| <a href=#556 id=556 data-nosnippet>556</a> Statement::Expr { expr, has_semi: <span class="kw">_ </span>} => { |
| <a href=#557 id=557 data-nosnippet>557</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>expr); |
| <a href=#558 id=558 data-nosnippet>558</a> } |
| <a href=#559 id=559 data-nosnippet>559</a> Statement::Item(<span class="kw">_</span>) => (), |
| <a href=#560 id=560 data-nosnippet>560</a> } |
| <a href=#561 id=561 data-nosnippet>561</a> } |
| <a href=#562 id=562 data-nosnippet>562</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(tail) = tail { |
| <a href=#563 id=563 data-nosnippet>563</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>tail); |
| <a href=#564 id=564 data-nosnippet>564</a> } |
| <a href=#565 id=565 data-nosnippet>565</a> } |
| <a href=#566 id=566 data-nosnippet>566</a> Expr::Call { callee, args } => { |
| <a href=#567 id=567 data-nosnippet>567</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>callee); |
| <a href=#568 id=568 data-nosnippet>568</a> <span class="self">self</span>.consume_exprs(args.iter().copied()); |
| <a href=#569 id=569 data-nosnippet>569</a> } |
| <a href=#570 id=570 data-nosnippet>570</a> Expr::MethodCall { receiver, args, .. } => { |
| <a href=#571 id=571 data-nosnippet>571</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>receiver); |
| <a href=#572 id=572 data-nosnippet>572</a> <span class="self">self</span>.consume_exprs(args.iter().copied()); |
| <a href=#573 id=573 data-nosnippet>573</a> } |
| <a href=#574 id=574 data-nosnippet>574</a> Expr::Match { expr, arms } => { |
| <a href=#575 id=575 data-nosnippet>575</a> <span class="kw">for </span>arm <span class="kw">in </span>arms.iter() { |
| <a href=#576 id=576 data-nosnippet>576</a> <span class="self">self</span>.consume_expr(arm.expr); |
| <a href=#577 id=577 data-nosnippet>577</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(guard) = arm.guard { |
| <a href=#578 id=578 data-nosnippet>578</a> <span class="self">self</span>.consume_expr(guard); |
| <a href=#579 id=579 data-nosnippet>579</a> } |
| <a href=#580 id=580 data-nosnippet>580</a> } |
| <a href=#581 id=581 data-nosnippet>581</a> <span class="self">self</span>.walk_expr(<span class="kw-2">*</span>expr); |
| <a href=#582 id=582 data-nosnippet>582</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(discr_place) = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>expr) |
| <a href=#583 id=583 data-nosnippet>583</a> && <span class="self">self</span>.is_upvar(<span class="kw-2">&</span>discr_place) |
| <a href=#584 id=584 data-nosnippet>584</a> { |
| <a href=#585 id=585 data-nosnippet>585</a> <span class="kw">let </span><span class="kw-2">mut </span>capture_mode = <span class="prelude-val">None</span>; |
| <a href=#586 id=586 data-nosnippet>586</a> <span class="kw">for </span>arm <span class="kw">in </span>arms.iter() { |
| <a href=#587 id=587 data-nosnippet>587</a> <span class="self">self</span>.walk_pat(<span class="kw-2">&mut </span>capture_mode, arm.pat); |
| <a href=#588 id=588 data-nosnippet>588</a> } |
| <a href=#589 id=589 data-nosnippet>589</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(c) = capture_mode { |
| <a href=#590 id=590 data-nosnippet>590</a> <span class="self">self</span>.push_capture(discr_place, c); |
| <a href=#591 id=591 data-nosnippet>591</a> } |
| <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> Expr::Break { expr, label: <span class="kw">_ </span>} |
| <a href=#595 id=595 data-nosnippet>595</a> | Expr::Return { expr } |
| <a href=#596 id=596 data-nosnippet>596</a> | Expr::Yield { expr } |
| <a href=#597 id=597 data-nosnippet>597</a> | Expr::Yeet { expr } => { |
| <a href=#598 id=598 data-nosnippet>598</a> <span class="kw">if let </span><span class="kw-2">&</span><span class="prelude-val">Some</span>(expr) = expr { |
| <a href=#599 id=599 data-nosnippet>599</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#600 id=600 data-nosnippet>600</a> } |
| <a href=#601 id=601 data-nosnippet>601</a> } |
| <a href=#602 id=602 data-nosnippet>602</a> <span class="kw-2">&</span>Expr::Become { expr } => { |
| <a href=#603 id=603 data-nosnippet>603</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#604 id=604 data-nosnippet>604</a> } |
| <a href=#605 id=605 data-nosnippet>605</a> Expr::RecordLit { fields, spread, .. } => { |
| <a href=#606 id=606 data-nosnippet>606</a> <span class="kw">if let </span><span class="kw-2">&</span><span class="prelude-val">Some</span>(expr) = spread { |
| <a href=#607 id=607 data-nosnippet>607</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#608 id=608 data-nosnippet>608</a> } |
| <a href=#609 id=609 data-nosnippet>609</a> <span class="self">self</span>.consume_exprs(fields.iter().map(|it| it.expr)); |
| <a href=#610 id=610 data-nosnippet>610</a> } |
| <a href=#611 id=611 data-nosnippet>611</a> Expr::Field { expr, name: <span class="kw">_ </span>} => <span class="self">self</span>.select_from_expr(<span class="kw-2">*</span>expr), |
| <a href=#612 id=612 data-nosnippet>612</a> Expr::UnaryOp { expr, op: UnaryOp::Deref } => { |
| <a href=#613 id=613 data-nosnippet>613</a> <span class="kw">if </span><span class="self">self</span>.result.method_resolution(tgt_expr).is_some() { |
| <a href=#614 id=614 data-nosnippet>614</a> <span class="comment">// Overloaded deref. |
| <a href=#615 id=615 data-nosnippet>615</a> </span><span class="kw">match </span><span class="self">self</span>.expr_ty_after_adjustments(<span class="kw-2">*</span>expr).kind() { |
| <a href=#616 id=616 data-nosnippet>616</a> TyKind::Ref(<span class="kw">_</span>, <span class="kw">_</span>, mutability) => { |
| <a href=#617 id=617 data-nosnippet>617</a> <span class="kw">let </span>place = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>expr); |
| <a href=#618 id=618 data-nosnippet>618</a> <span class="kw">match </span>mutability { |
| <a href=#619 id=619 data-nosnippet>619</a> Mutability::Mut => <span class="self">self</span>.mutate_expr(<span class="kw-2">*</span>expr, place), |
| <a href=#620 id=620 data-nosnippet>620</a> Mutability::Not => <span class="self">self</span>.ref_expr(<span class="kw-2">*</span>expr, place), |
| <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">// FIXME: Is this correct wrt. raw pointer derefs? |
| <a href=#624 id=624 data-nosnippet>624</a> </span>TyKind::RawPtr(..) => <span class="self">self</span>.select_from_expr(<span class="kw-2">*</span>expr), |
| <a href=#625 id=625 data-nosnippet>625</a> <span class="kw">_ </span>=> <span class="macro">never!</span>(<span class="string">"deref adjustments should include taking a mutable reference"</span>), |
| <a href=#626 id=626 data-nosnippet>626</a> } |
| <a href=#627 id=627 data-nosnippet>627</a> } <span class="kw">else </span>{ |
| <a href=#628 id=628 data-nosnippet>628</a> <span class="self">self</span>.select_from_expr(<span class="kw-2">*</span>expr); |
| <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> Expr::Let { pat, expr } => { |
| <a href=#632 id=632 data-nosnippet>632</a> <span class="self">self</span>.walk_expr(<span class="kw-2">*</span>expr); |
| <a href=#633 id=633 data-nosnippet>633</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(place) = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>expr) { |
| <a href=#634 id=634 data-nosnippet>634</a> <span class="self">self</span>.consume_with_pat(place, <span class="kw-2">*</span>pat); |
| <a href=#635 id=635 data-nosnippet>635</a> } |
| <a href=#636 id=636 data-nosnippet>636</a> } |
| <a href=#637 id=637 data-nosnippet>637</a> Expr::UnaryOp { expr, op: <span class="kw">_ </span>} |
| <a href=#638 id=638 data-nosnippet>638</a> | Expr::Array(Array::Repeat { initializer: expr, repeat: <span class="kw">_ </span>}) |
| <a href=#639 id=639 data-nosnippet>639</a> | Expr::Await { expr } |
| <a href=#640 id=640 data-nosnippet>640</a> | Expr::Loop { body: expr, label: <span class="kw">_ </span>} |
| <a href=#641 id=641 data-nosnippet>641</a> | Expr::Box { expr } |
| <a href=#642 id=642 data-nosnippet>642</a> | Expr::Cast { expr, type_ref: <span class="kw">_ </span>} => { |
| <a href=#643 id=643 data-nosnippet>643</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>expr); |
| <a href=#644 id=644 data-nosnippet>644</a> } |
| <a href=#645 id=645 data-nosnippet>645</a> Expr::Ref { expr, rawness: <span class="kw">_</span>, mutability } => { |
| <a href=#646 id=646 data-nosnippet>646</a> <span class="comment">// We need to do this before we push the span so the order will be correct. |
| <a href=#647 id=647 data-nosnippet>647</a> </span><span class="kw">let </span>place = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>expr); |
| <a href=#648 id=648 data-nosnippet>648</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::ExprId(tgt_expr)); |
| <a href=#649 id=649 data-nosnippet>649</a> <span class="kw">match </span>mutability { |
| <a href=#650 id=650 data-nosnippet>650</a> hir_def::type_ref::Mutability::Shared => <span class="self">self</span>.ref_expr(<span class="kw-2">*</span>expr, place), |
| <a href=#651 id=651 data-nosnippet>651</a> hir_def::type_ref::Mutability::Mut => <span class="self">self</span>.mutate_expr(<span class="kw-2">*</span>expr, place), |
| <a href=#652 id=652 data-nosnippet>652</a> } |
| <a href=#653 id=653 data-nosnippet>653</a> } |
| <a href=#654 id=654 data-nosnippet>654</a> Expr::BinaryOp { lhs, rhs, op } => { |
| <a href=#655 id=655 data-nosnippet>655</a> <span class="kw">let </span><span class="prelude-val">Some</span>(op) = op <span class="kw">else </span>{ |
| <a href=#656 id=656 data-nosnippet>656</a> <span class="kw">return</span>; |
| <a href=#657 id=657 data-nosnippet>657</a> }; |
| <a href=#658 id=658 data-nosnippet>658</a> <span class="kw">if </span><span class="macro">matches!</span>(op, BinaryOp::Assignment { .. }) { |
| <a href=#659 id=659 data-nosnippet>659</a> <span class="kw">let </span>place = <span class="self">self</span>.place_of_expr(<span class="kw-2">*</span>lhs); |
| <a href=#660 id=660 data-nosnippet>660</a> <span class="self">self</span>.mutate_expr(<span class="kw-2">*</span>lhs, place); |
| <a href=#661 id=661 data-nosnippet>661</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>rhs); |
| <a href=#662 id=662 data-nosnippet>662</a> <span class="kw">return</span>; |
| <a href=#663 id=663 data-nosnippet>663</a> } |
| <a href=#664 id=664 data-nosnippet>664</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>lhs); |
| <a href=#665 id=665 data-nosnippet>665</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>rhs); |
| <a href=#666 id=666 data-nosnippet>666</a> } |
| <a href=#667 id=667 data-nosnippet>667</a> Expr::Range { lhs, rhs, range_type: <span class="kw">_ </span>} => { |
| <a href=#668 id=668 data-nosnippet>668</a> <span class="kw">if let </span><span class="kw-2">&</span><span class="prelude-val">Some</span>(expr) = lhs { |
| <a href=#669 id=669 data-nosnippet>669</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#670 id=670 data-nosnippet>670</a> } |
| <a href=#671 id=671 data-nosnippet>671</a> <span class="kw">if let </span><span class="kw-2">&</span><span class="prelude-val">Some</span>(expr) = rhs { |
| <a href=#672 id=672 data-nosnippet>672</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#673 id=673 data-nosnippet>673</a> } |
| <a href=#674 id=674 data-nosnippet>674</a> } |
| <a href=#675 id=675 data-nosnippet>675</a> Expr::Index { base, index } => { |
| <a href=#676 id=676 data-nosnippet>676</a> <span class="self">self</span>.select_from_expr(<span class="kw-2">*</span>base); |
| <a href=#677 id=677 data-nosnippet>677</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>index); |
| <a href=#678 id=678 data-nosnippet>678</a> } |
| <a href=#679 id=679 data-nosnippet>679</a> Expr::Closure { .. } => { |
| <a href=#680 id=680 data-nosnippet>680</a> <span class="kw">let </span>ty = <span class="self">self</span>.expr_ty(tgt_expr); |
| <a href=#681 id=681 data-nosnippet>681</a> <span class="kw">let </span>TyKind::Closure(id, <span class="kw">_</span>) = ty.kind() <span class="kw">else </span>{ |
| <a href=#682 id=682 data-nosnippet>682</a> <span class="macro">never!</span>(<span class="string">"closure type is always closure"</span>); |
| <a href=#683 id=683 data-nosnippet>683</a> <span class="kw">return</span>; |
| <a href=#684 id=684 data-nosnippet>684</a> }; |
| <a href=#685 id=685 data-nosnippet>685</a> <span class="kw">let </span>(captures, <span class="kw">_</span>) = |
| <a href=#686 id=686 data-nosnippet>686</a> <span class="self">self</span>.result.closure_info.get(<span class="kw-2">&</span>id.<span class="number">0</span>).expect( |
| <a href=#687 id=687 data-nosnippet>687</a> <span class="string">"We sort closures, so we should always have data for inner closures"</span>, |
| <a href=#688 id=688 data-nosnippet>688</a> ); |
| <a href=#689 id=689 data-nosnippet>689</a> <span class="kw">let </span><span class="kw-2">mut </span>cc = mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_captures); |
| <a href=#690 id=690 data-nosnippet>690</a> cc.extend(captures.iter().filter(|it| <span class="self">self</span>.is_upvar(<span class="kw-2">&</span>it.place)).map(|it| { |
| <a href=#691 id=691 data-nosnippet>691</a> CapturedItemWithoutTy { |
| <a href=#692 id=692 data-nosnippet>692</a> place: it.place.clone(), |
| <a href=#693 id=693 data-nosnippet>693</a> kind: it.kind, |
| <a href=#694 id=694 data-nosnippet>694</a> span_stacks: it.span_stacks.clone(), |
| <a href=#695 id=695 data-nosnippet>695</a> } |
| <a href=#696 id=696 data-nosnippet>696</a> })); |
| <a href=#697 id=697 data-nosnippet>697</a> <span class="self">self</span>.current_captures = cc; |
| <a href=#698 id=698 data-nosnippet>698</a> } |
| <a href=#699 id=699 data-nosnippet>699</a> Expr::Array(Array::ElementList { elements: exprs }) | Expr::Tuple { exprs } => { |
| <a href=#700 id=700 data-nosnippet>700</a> <span class="self">self</span>.consume_exprs(exprs.iter().copied()) |
| <a href=#701 id=701 data-nosnippet>701</a> } |
| <a href=#702 id=702 data-nosnippet>702</a> <span class="kw-2">&</span>Expr::Assignment { target, value } => { |
| <a href=#703 id=703 data-nosnippet>703</a> <span class="self">self</span>.walk_expr(value); |
| <a href=#704 id=704 data-nosnippet>704</a> <span class="kw">let </span>resolver_guard = |
| <a href=#705 id=705 data-nosnippet>705</a> <span class="self">self</span>.resolver.update_to_inner_scope(<span class="self">self</span>.db, <span class="self">self</span>.owner, tgt_expr); |
| <a href=#706 id=706 data-nosnippet>706</a> <span class="kw">match </span><span class="self">self</span>.place_of_expr(value) { |
| <a href=#707 id=707 data-nosnippet>707</a> <span class="prelude-val">Some</span>(rhs_place) => { |
| <a href=#708 id=708 data-nosnippet>708</a> <span class="self">self</span>.inside_assignment = <span class="bool-val">true</span>; |
| <a href=#709 id=709 data-nosnippet>709</a> <span class="self">self</span>.consume_with_pat(rhs_place, target); |
| <a href=#710 id=710 data-nosnippet>710</a> <span class="self">self</span>.inside_assignment = <span class="bool-val">false</span>; |
| <a href=#711 id=711 data-nosnippet>711</a> } |
| <a href=#712 id=712 data-nosnippet>712</a> <span class="prelude-val">None </span>=> <span class="self">self</span>.body.walk_pats(target, <span class="kw-2">&mut </span>|pat| <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.body[pat] { |
| <a href=#713 id=713 data-nosnippet>713</a> Pat::Path(path) => <span class="self">self</span>.mutate_path_pat(path, pat), |
| <a href=#714 id=714 data-nosnippet>714</a> <span class="kw-2">&</span>Pat::Expr(expr) => { |
| <a href=#715 id=715 data-nosnippet>715</a> <span class="kw">let </span>place = <span class="self">self</span>.place_of_expr(expr); |
| <a href=#716 id=716 data-nosnippet>716</a> <span class="self">self</span>.mutate_expr(expr, place); |
| <a href=#717 id=717 data-nosnippet>717</a> } |
| <a href=#718 id=718 data-nosnippet>718</a> <span class="kw">_ </span>=> {} |
| <a href=#719 id=719 data-nosnippet>719</a> }), |
| <a href=#720 id=720 data-nosnippet>720</a> } |
| <a href=#721 id=721 data-nosnippet>721</a> <span class="self">self</span>.resolver.reset_to_guard(resolver_guard); |
| <a href=#722 id=722 data-nosnippet>722</a> } |
| <a href=#723 id=723 data-nosnippet>723</a> |
| <a href=#724 id=724 data-nosnippet>724</a> Expr::Missing |
| <a href=#725 id=725 data-nosnippet>725</a> | Expr::Continue { .. } |
| <a href=#726 id=726 data-nosnippet>726</a> | Expr::Path(<span class="kw">_</span>) |
| <a href=#727 id=727 data-nosnippet>727</a> | Expr::Literal(<span class="kw">_</span>) |
| <a href=#728 id=728 data-nosnippet>728</a> | Expr::Const(<span class="kw">_</span>) |
| <a href=#729 id=729 data-nosnippet>729</a> | Expr::Underscore => (), |
| <a href=#730 id=730 data-nosnippet>730</a> } |
| <a href=#731 id=731 data-nosnippet>731</a> } |
| <a href=#732 id=732 data-nosnippet>732</a> |
| <a href=#733 id=733 data-nosnippet>733</a> <span class="kw">fn </span>walk_pat(<span class="kw-2">&mut </span><span class="self">self</span>, result: <span class="kw-2">&mut </span><span class="prelude-ty">Option</span><CaptureKind>, pat: PatId) { |
| <a href=#734 id=734 data-nosnippet>734</a> <span class="kw">let </span><span class="kw-2">mut </span>update_result = |ck: CaptureKind| <span class="kw">match </span>result { |
| <a href=#735 id=735 data-nosnippet>735</a> <span class="prelude-val">Some</span>(r) => { |
| <a href=#736 id=736 data-nosnippet>736</a> <span class="kw-2">*</span>r = cmp::max(<span class="kw-2">*</span>r, ck); |
| <a href=#737 id=737 data-nosnippet>737</a> } |
| <a href=#738 id=738 data-nosnippet>738</a> <span class="prelude-val">None </span>=> <span class="kw-2">*</span>result = <span class="prelude-val">Some</span>(ck), |
| <a href=#739 id=739 data-nosnippet>739</a> }; |
| <a href=#740 id=740 data-nosnippet>740</a> |
| <a href=#741 id=741 data-nosnippet>741</a> <span class="self">self</span>.walk_pat_inner( |
| <a href=#742 id=742 data-nosnippet>742</a> pat, |
| <a href=#743 id=743 data-nosnippet>743</a> <span class="kw-2">&mut </span>update_result, |
| <a href=#744 id=744 data-nosnippet>744</a> BorrowKind::Mut { kind: MutBorrowKind::Default }, |
| <a href=#745 id=745 data-nosnippet>745</a> ); |
| <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">fn </span>walk_pat_inner( |
| <a href=#749 id=749 data-nosnippet>749</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#750 id=750 data-nosnippet>750</a> p: PatId, |
| <a href=#751 id=751 data-nosnippet>751</a> update_result: <span class="kw-2">&mut </span><span class="kw">impl </span>FnMut(CaptureKind), |
| <a href=#752 id=752 data-nosnippet>752</a> <span class="kw-2">mut </span>for_mut: BorrowKind, |
| <a href=#753 id=753 data-nosnippet>753</a> ) { |
| <a href=#754 id=754 data-nosnippet>754</a> <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.body[p] { |
| <a href=#755 id=755 data-nosnippet>755</a> Pat::Ref { .. } |
| <a href=#756 id=756 data-nosnippet>756</a> | Pat::Box { .. } |
| <a href=#757 id=757 data-nosnippet>757</a> | Pat::Missing |
| <a href=#758 id=758 data-nosnippet>758</a> | Pat::Wild |
| <a href=#759 id=759 data-nosnippet>759</a> | Pat::Tuple { .. } |
| <a href=#760 id=760 data-nosnippet>760</a> | Pat::Expr(<span class="kw">_</span>) |
| <a href=#761 id=761 data-nosnippet>761</a> | Pat::Or(<span class="kw">_</span>) => (), |
| <a href=#762 id=762 data-nosnippet>762</a> Pat::TupleStruct { .. } | Pat::Record { .. } => { |
| <a href=#763 id=763 data-nosnippet>763</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(variant) = <span class="self">self</span>.result.variant_resolution_for_pat(p) { |
| <a href=#764 id=764 data-nosnippet>764</a> <span class="kw">let </span>adt = variant.adt_id(<span class="self">self</span>.db); |
| <a href=#765 id=765 data-nosnippet>765</a> <span class="kw">let </span>is_multivariant = <span class="kw">match </span>adt { |
| <a href=#766 id=766 data-nosnippet>766</a> hir_def::AdtId::EnumId(e) => e.enum_variants(<span class="self">self</span>.db).variants.len() != <span class="number">1</span>, |
| <a href=#767 id=767 data-nosnippet>767</a> <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| <a href=#768 id=768 data-nosnippet>768</a> }; |
| <a href=#769 id=769 data-nosnippet>769</a> <span class="kw">if </span>is_multivariant { |
| <a href=#770 id=770 data-nosnippet>770</a> update_result(CaptureKind::ByRef(BorrowKind::Shared)); |
| <a href=#771 id=771 data-nosnippet>771</a> } |
| <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> Pat::Slice { .. } |
| <a href=#775 id=775 data-nosnippet>775</a> | Pat::ConstBlock(<span class="kw">_</span>) |
| <a href=#776 id=776 data-nosnippet>776</a> | Pat::Path(<span class="kw">_</span>) |
| <a href=#777 id=777 data-nosnippet>777</a> | Pat::Lit(<span class="kw">_</span>) |
| <a href=#778 id=778 data-nosnippet>778</a> | Pat::Range { .. } => { |
| <a href=#779 id=779 data-nosnippet>779</a> update_result(CaptureKind::ByRef(BorrowKind::Shared)); |
| <a href=#780 id=780 data-nosnippet>780</a> } |
| <a href=#781 id=781 data-nosnippet>781</a> Pat::Bind { id, .. } => <span class="kw">match </span><span class="self">self</span>.result.binding_modes[p] { |
| <a href=#782 id=782 data-nosnippet>782</a> <span class="kw">crate</span>::BindingMode::Move => { |
| <a href=#783 id=783 data-nosnippet>783</a> <span class="kw">if </span><span class="self">self</span>.is_ty_copy(<span class="self">self</span>.result.type_of_binding[<span class="kw-2">*</span>id]) { |
| <a href=#784 id=784 data-nosnippet>784</a> update_result(CaptureKind::ByRef(BorrowKind::Shared)); |
| <a href=#785 id=785 data-nosnippet>785</a> } <span class="kw">else </span>{ |
| <a href=#786 id=786 data-nosnippet>786</a> update_result(CaptureKind::ByValue); |
| <a href=#787 id=787 data-nosnippet>787</a> } |
| <a href=#788 id=788 data-nosnippet>788</a> } |
| <a href=#789 id=789 data-nosnippet>789</a> <span class="kw">crate</span>::BindingMode::Ref(r) => <span class="kw">match </span>r { |
| <a href=#790 id=790 data-nosnippet>790</a> Mutability::Mut => update_result(CaptureKind::ByRef(for_mut)), |
| <a href=#791 id=791 data-nosnippet>791</a> Mutability::Not => update_result(CaptureKind::ByRef(BorrowKind::Shared)), |
| <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> } |
| <a href=#795 id=795 data-nosnippet>795</a> <span class="kw">if </span><span class="self">self</span>.result.pat_adjustments.get(<span class="kw-2">&</span>p).is_some_and(|it| !it.is_empty()) { |
| <a href=#796 id=796 data-nosnippet>796</a> for_mut = BorrowKind::Mut { kind: MutBorrowKind::ClosureCapture }; |
| <a href=#797 id=797 data-nosnippet>797</a> } |
| <a href=#798 id=798 data-nosnippet>798</a> <span class="self">self</span>.body.walk_pats_shallow(p, |p| <span class="self">self</span>.walk_pat_inner(p, update_result, for_mut)); |
| <a href=#799 id=799 data-nosnippet>799</a> } |
| <a href=#800 id=800 data-nosnippet>800</a> |
| <a href=#801 id=801 data-nosnippet>801</a> <span class="kw">fn </span>is_upvar(<span class="kw-2">&</span><span class="self">self</span>, place: <span class="kw-2">&</span>HirPlace<<span class="lifetime">'db</span>>) -> bool { |
| <a href=#802 id=802 data-nosnippet>802</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(c) = <span class="self">self</span>.current_closure { |
| <a href=#803 id=803 data-nosnippet>803</a> <span class="kw">let </span>InternedClosure(<span class="kw">_</span>, root) = <span class="self">self</span>.db.lookup_intern_closure(c); |
| <a href=#804 id=804 data-nosnippet>804</a> <span class="kw">return </span><span class="self">self</span>.body.is_binding_upvar(place.local, root); |
| <a href=#805 id=805 data-nosnippet>805</a> } |
| <a href=#806 id=806 data-nosnippet>806</a> <span class="bool-val">false |
| <a href=#807 id=807 data-nosnippet>807</a> </span>} |
| <a href=#808 id=808 data-nosnippet>808</a> |
| <a href=#809 id=809 data-nosnippet>809</a> <span class="kw">fn </span>is_ty_copy(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> bool { |
| <a href=#810 id=810 data-nosnippet>810</a> <span class="kw">if let </span>TyKind::Closure(id, <span class="kw">_</span>) = ty.kind() { |
| <a href=#811 id=811 data-nosnippet>811</a> <span class="comment">// FIXME: We handle closure as a special case, since chalk consider every closure as copy. We |
| <a href=#812 id=812 data-nosnippet>812</a> // should probably let chalk know which closures are copy, but I don't know how doing it |
| <a href=#813 id=813 data-nosnippet>813</a> // without creating query cycles. |
| <a href=#814 id=814 data-nosnippet>814</a> </span><span class="kw">return </span><span class="self">self |
| <a href=#815 id=815 data-nosnippet>815</a> </span>.result |
| <a href=#816 id=816 data-nosnippet>816</a> .closure_info |
| <a href=#817 id=817 data-nosnippet>817</a> .get(<span class="kw-2">&</span>id.<span class="number">0</span>) |
| <a href=#818 id=818 data-nosnippet>818</a> .map(|it| it.<span class="number">1 </span>== FnTrait::Fn) |
| <a href=#819 id=819 data-nosnippet>819</a> .unwrap_or(<span class="bool-val">true</span>); |
| <a href=#820 id=820 data-nosnippet>820</a> } |
| <a href=#821 id=821 data-nosnippet>821</a> <span class="kw">let </span>ty = <span class="self">self</span>.table.resolve_completely(ty); |
| <a href=#822 id=822 data-nosnippet>822</a> <span class="self">self</span>.table.type_is_copy_modulo_regions(ty) |
| <a href=#823 id=823 data-nosnippet>823</a> } |
| <a href=#824 id=824 data-nosnippet>824</a> |
| <a href=#825 id=825 data-nosnippet>825</a> <span class="kw">fn </span>select_from_expr(<span class="kw-2">&mut </span><span class="self">self</span>, expr: ExprId) { |
| <a href=#826 id=826 data-nosnippet>826</a> <span class="self">self</span>.walk_expr(expr); |
| <a href=#827 id=827 data-nosnippet>827</a> } |
| <a href=#828 id=828 data-nosnippet>828</a> |
| <a href=#829 id=829 data-nosnippet>829</a> <span class="kw">fn </span>restrict_precision_for_unsafe(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#830 id=830 data-nosnippet>830</a> <span class="comment">// FIXME: Borrow checker problems without this. |
| <a href=#831 id=831 data-nosnippet>831</a> </span><span class="kw">let </span><span class="kw-2">mut </span>current_captures = std::mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_captures); |
| <a href=#832 id=832 data-nosnippet>832</a> <span class="kw">for </span>capture <span class="kw">in </span><span class="kw-2">&mut </span>current_captures { |
| <a href=#833 id=833 data-nosnippet>833</a> <span class="kw">let </span><span class="kw-2">mut </span>ty = <span class="self">self</span>.table.resolve_completely(<span class="self">self</span>.result[capture.place.local]); |
| <a href=#834 id=834 data-nosnippet>834</a> <span class="kw">if </span>ty.is_raw_ptr() || ty.is_union() { |
| <a href=#835 id=835 data-nosnippet>835</a> capture.kind = CaptureKind::ByRef(BorrowKind::Shared); |
| <a href=#836 id=836 data-nosnippet>836</a> <span class="self">self</span>.truncate_capture_spans(capture, <span class="number">0</span>); |
| <a href=#837 id=837 data-nosnippet>837</a> capture.place.projections.truncate(<span class="number">0</span>); |
| <a href=#838 id=838 data-nosnippet>838</a> <span class="kw">continue</span>; |
| <a href=#839 id=839 data-nosnippet>839</a> } |
| <a href=#840 id=840 data-nosnippet>840</a> <span class="kw">for </span>(i, p) <span class="kw">in </span>capture.place.projections.iter().enumerate() { |
| <a href=#841 id=841 data-nosnippet>841</a> ty = p.projected_ty( |
| <a href=#842 id=842 data-nosnippet>842</a> <span class="kw-2">&</span><span class="self">self</span>.table.infer_ctxt, |
| <a href=#843 id=843 data-nosnippet>843</a> <span class="self">self</span>.table.param_env, |
| <a href=#844 id=844 data-nosnippet>844</a> ty, |
| <a href=#845 id=845 data-nosnippet>845</a> |<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>| { |
| <a href=#846 id=846 data-nosnippet>846</a> <span class="macro">unreachable!</span>(<span class="string">"Closure field only happens in MIR"</span>); |
| <a href=#847 id=847 data-nosnippet>847</a> }, |
| <a href=#848 id=848 data-nosnippet>848</a> <span class="self">self</span>.owner.module(<span class="self">self</span>.db).krate(<span class="self">self</span>.db), |
| <a href=#849 id=849 data-nosnippet>849</a> ); |
| <a href=#850 id=850 data-nosnippet>850</a> <span class="kw">if </span>ty.is_raw_ptr() || ty.is_union() { |
| <a href=#851 id=851 data-nosnippet>851</a> capture.kind = CaptureKind::ByRef(BorrowKind::Shared); |
| <a href=#852 id=852 data-nosnippet>852</a> <span class="self">self</span>.truncate_capture_spans(capture, i + <span class="number">1</span>); |
| <a href=#853 id=853 data-nosnippet>853</a> capture.place.projections.truncate(i + <span class="number">1</span>); |
| <a href=#854 id=854 data-nosnippet>854</a> <span class="kw">break</span>; |
| <a href=#855 id=855 data-nosnippet>855</a> } |
| <a href=#856 id=856 data-nosnippet>856</a> } |
| <a href=#857 id=857 data-nosnippet>857</a> } |
| <a href=#858 id=858 data-nosnippet>858</a> <span class="self">self</span>.current_captures = current_captures; |
| <a href=#859 id=859 data-nosnippet>859</a> } |
| <a href=#860 id=860 data-nosnippet>860</a> |
| <a href=#861 id=861 data-nosnippet>861</a> <span class="kw">fn </span>adjust_for_move_closure(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#862 id=862 data-nosnippet>862</a> <span class="comment">// FIXME: Borrow checker won't allow without this. |
| <a href=#863 id=863 data-nosnippet>863</a> </span><span class="kw">let </span><span class="kw-2">mut </span>current_captures = std::mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_captures); |
| <a href=#864 id=864 data-nosnippet>864</a> <span class="kw">for </span>capture <span class="kw">in </span><span class="kw-2">&mut </span>current_captures { |
| <a href=#865 id=865 data-nosnippet>865</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(first_deref) = |
| <a href=#866 id=866 data-nosnippet>866</a> capture.place.projections.iter().position(|proj| <span class="kw-2">*</span>proj == ProjectionElem::Deref) |
| <a href=#867 id=867 data-nosnippet>867</a> { |
| <a href=#868 id=868 data-nosnippet>868</a> <span class="self">self</span>.truncate_capture_spans(capture, first_deref); |
| <a href=#869 id=869 data-nosnippet>869</a> capture.place.projections.truncate(first_deref); |
| <a href=#870 id=870 data-nosnippet>870</a> } |
| <a href=#871 id=871 data-nosnippet>871</a> capture.kind = CaptureKind::ByValue; |
| <a href=#872 id=872 data-nosnippet>872</a> } |
| <a href=#873 id=873 data-nosnippet>873</a> <span class="self">self</span>.current_captures = current_captures; |
| <a href=#874 id=874 data-nosnippet>874</a> } |
| <a href=#875 id=875 data-nosnippet>875</a> |
| <a href=#876 id=876 data-nosnippet>876</a> <span class="kw">fn </span>minimize_captures(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#877 id=877 data-nosnippet>877</a> <span class="self">self</span>.current_captures.sort_unstable_by_key(|it| it.place.projections.len()); |
| <a href=#878 id=878 data-nosnippet>878</a> <span class="kw">let </span><span class="kw-2">mut </span>hash_map = FxHashMap::<HirPlace<<span class="lifetime">'db</span>>, usize>::default(); |
| <a href=#879 id=879 data-nosnippet>879</a> <span class="kw">let </span>result = mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_captures); |
| <a href=#880 id=880 data-nosnippet>880</a> <span class="kw">for </span><span class="kw-2">mut </span>item <span class="kw">in </span>result { |
| <a href=#881 id=881 data-nosnippet>881</a> <span class="kw">let </span><span class="kw-2">mut </span>lookup_place = HirPlace { local: item.place.local, projections: <span class="macro">vec!</span>[] }; |
| <a href=#882 id=882 data-nosnippet>882</a> <span class="kw">let </span><span class="kw-2">mut </span>it = item.place.projections.iter(); |
| <a href=#883 id=883 data-nosnippet>883</a> <span class="kw">let </span>prev_index = <span class="kw">loop </span>{ |
| <a href=#884 id=884 data-nosnippet>884</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(k) = hash_map.get(<span class="kw-2">&</span>lookup_place) { |
| <a href=#885 id=885 data-nosnippet>885</a> <span class="kw">break </span><span class="prelude-val">Some</span>(<span class="kw-2">*</span>k); |
| <a href=#886 id=886 data-nosnippet>886</a> } |
| <a href=#887 id=887 data-nosnippet>887</a> <span class="kw">match </span>it.next() { |
| <a href=#888 id=888 data-nosnippet>888</a> <span class="prelude-val">Some</span>(it) => { |
| <a href=#889 id=889 data-nosnippet>889</a> lookup_place.projections.push(it.clone()); |
| <a href=#890 id=890 data-nosnippet>890</a> } |
| <a href=#891 id=891 data-nosnippet>891</a> <span class="prelude-val">None </span>=> <span class="kw">break </span><span class="prelude-val">None</span>, |
| <a href=#892 id=892 data-nosnippet>892</a> } |
| <a href=#893 id=893 data-nosnippet>893</a> }; |
| <a href=#894 id=894 data-nosnippet>894</a> <span class="kw">match </span>prev_index { |
| <a href=#895 id=895 data-nosnippet>895</a> <span class="prelude-val">Some</span>(p) => { |
| <a href=#896 id=896 data-nosnippet>896</a> <span class="kw">let </span>prev_projections_len = <span class="self">self</span>.current_captures[p].place.projections.len(); |
| <a href=#897 id=897 data-nosnippet>897</a> <span class="self">self</span>.truncate_capture_spans(<span class="kw-2">&mut </span>item, prev_projections_len); |
| <a href=#898 id=898 data-nosnippet>898</a> <span class="self">self</span>.current_captures[p].span_stacks.extend(item.span_stacks); |
| <a href=#899 id=899 data-nosnippet>899</a> <span class="kw">let </span>len = <span class="self">self</span>.current_captures[p].place.projections.len(); |
| <a href=#900 id=900 data-nosnippet>900</a> <span class="kw">let </span>kind_after_truncate = |
| <a href=#901 id=901 data-nosnippet>901</a> item.place.capture_kind_of_truncated_place(item.kind, len); |
| <a href=#902 id=902 data-nosnippet>902</a> <span class="self">self</span>.current_captures[p].kind = |
| <a href=#903 id=903 data-nosnippet>903</a> cmp::max(kind_after_truncate, <span class="self">self</span>.current_captures[p].kind); |
| <a href=#904 id=904 data-nosnippet>904</a> } |
| <a href=#905 id=905 data-nosnippet>905</a> <span class="prelude-val">None </span>=> { |
| <a href=#906 id=906 data-nosnippet>906</a> hash_map.insert(item.place.clone(), <span class="self">self</span>.current_captures.len()); |
| <a href=#907 id=907 data-nosnippet>907</a> <span class="self">self</span>.current_captures.push(item); |
| <a href=#908 id=908 data-nosnippet>908</a> } |
| <a href=#909 id=909 data-nosnippet>909</a> } |
| <a href=#910 id=910 data-nosnippet>910</a> } |
| <a href=#911 id=911 data-nosnippet>911</a> } |
| <a href=#912 id=912 data-nosnippet>912</a> |
| <a href=#913 id=913 data-nosnippet>913</a> <span class="kw">fn </span>consume_with_pat(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>place: HirPlace<<span class="lifetime">'db</span>>, tgt_pat: PatId) { |
| <a href=#914 id=914 data-nosnippet>914</a> <span class="kw">let </span>adjustments_count = |
| <a href=#915 id=915 data-nosnippet>915</a> <span class="self">self</span>.result.pat_adjustments.get(<span class="kw-2">&</span>tgt_pat).map(|it| it.len()).unwrap_or_default(); |
| <a href=#916 id=916 data-nosnippet>916</a> place.projections.extend((<span class="number">0</span>..adjustments_count).map(|<span class="kw">_</span>| ProjectionElem::Deref)); |
| <a href=#917 id=917 data-nosnippet>917</a> <span class="self">self</span>.current_capture_span_stack |
| <a href=#918 id=918 data-nosnippet>918</a> .extend((<span class="number">0</span>..adjustments_count).map(|<span class="kw">_</span>| MirSpan::PatId(tgt_pat))); |
| <a href=#919 id=919 data-nosnippet>919</a> <span class="lifetime">'reset_span_stack</span>: { |
| <a href=#920 id=920 data-nosnippet>920</a> <span class="kw">match </span><span class="kw-2">&</span><span class="self">self</span>.body[tgt_pat] { |
| <a href=#921 id=921 data-nosnippet>921</a> Pat::Missing | Pat::Wild => (), |
| <a href=#922 id=922 data-nosnippet>922</a> Pat::Tuple { args, ellipsis } => { |
| <a href=#923 id=923 data-nosnippet>923</a> <span class="kw">let </span>(al, ar) = args.split_at(ellipsis.map_or(args.len(), |it| it <span class="kw">as </span>usize)); |
| <a href=#924 id=924 data-nosnippet>924</a> <span class="kw">let </span>field_count = <span class="kw">match </span><span class="self">self</span>.result[tgt_pat].kind() { |
| <a href=#925 id=925 data-nosnippet>925</a> TyKind::Tuple(s) => s.len(), |
| <a href=#926 id=926 data-nosnippet>926</a> <span class="kw">_ </span>=> <span class="kw">break </span><span class="lifetime">'reset_span_stack</span>, |
| <a href=#927 id=927 data-nosnippet>927</a> }; |
| <a href=#928 id=928 data-nosnippet>928</a> <span class="kw">let </span>fields = <span class="number">0</span>..field_count; |
| <a href=#929 id=929 data-nosnippet>929</a> <span class="kw">let </span>it = al.iter().zip(fields.clone()).chain(ar.iter().rev().zip(fields.rev())); |
| <a href=#930 id=930 data-nosnippet>930</a> <span class="kw">for </span>(<span class="kw-2">&</span>arg, i) <span class="kw">in </span>it { |
| <a href=#931 id=931 data-nosnippet>931</a> <span class="kw">let </span><span class="kw-2">mut </span>p = place.clone(); |
| <a href=#932 id=932 data-nosnippet>932</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::PatId(arg)); |
| <a href=#933 id=933 data-nosnippet>933</a> p.projections.push(ProjectionElem::Field(Either::Right(TupleFieldId { |
| <a href=#934 id=934 data-nosnippet>934</a> tuple: TupleId(!<span class="number">0</span>), <span class="comment">// dummy this, as its unused anyways |
| <a href=#935 id=935 data-nosnippet>935</a> </span>index: i <span class="kw">as </span>u32, |
| <a href=#936 id=936 data-nosnippet>936</a> }))); |
| <a href=#937 id=937 data-nosnippet>937</a> <span class="self">self</span>.consume_with_pat(p, arg); |
| <a href=#938 id=938 data-nosnippet>938</a> <span class="self">self</span>.current_capture_span_stack.pop(); |
| <a href=#939 id=939 data-nosnippet>939</a> } |
| <a href=#940 id=940 data-nosnippet>940</a> } |
| <a href=#941 id=941 data-nosnippet>941</a> Pat::Or(pats) => { |
| <a href=#942 id=942 data-nosnippet>942</a> <span class="kw">for </span>pat <span class="kw">in </span>pats.iter() { |
| <a href=#943 id=943 data-nosnippet>943</a> <span class="self">self</span>.consume_with_pat(place.clone(), <span class="kw-2">*</span>pat); |
| <a href=#944 id=944 data-nosnippet>944</a> } |
| <a href=#945 id=945 data-nosnippet>945</a> } |
| <a href=#946 id=946 data-nosnippet>946</a> Pat::Record { args, .. } => { |
| <a href=#947 id=947 data-nosnippet>947</a> <span class="kw">let </span><span class="prelude-val">Some</span>(variant) = <span class="self">self</span>.result.variant_resolution_for_pat(tgt_pat) <span class="kw">else </span>{ |
| <a href=#948 id=948 data-nosnippet>948</a> <span class="kw">break </span><span class="lifetime">'reset_span_stack</span>; |
| <a href=#949 id=949 data-nosnippet>949</a> }; |
| <a href=#950 id=950 data-nosnippet>950</a> <span class="kw">match </span>variant { |
| <a href=#951 id=951 data-nosnippet>951</a> VariantId::EnumVariantId(<span class="kw">_</span>) | VariantId::UnionId(<span class="kw">_</span>) => { |
| <a href=#952 id=952 data-nosnippet>952</a> <span class="self">self</span>.consume_place(place) |
| <a href=#953 id=953 data-nosnippet>953</a> } |
| <a href=#954 id=954 data-nosnippet>954</a> VariantId::StructId(s) => { |
| <a href=#955 id=955 data-nosnippet>955</a> <span class="kw">let </span>vd = s.fields(<span class="self">self</span>.db); |
| <a href=#956 id=956 data-nosnippet>956</a> <span class="kw">for </span>field_pat <span class="kw">in </span>args.iter() { |
| <a href=#957 id=957 data-nosnippet>957</a> <span class="kw">let </span>arg = field_pat.pat; |
| <a href=#958 id=958 data-nosnippet>958</a> <span class="kw">let </span><span class="prelude-val">Some</span>(local_id) = vd.field(<span class="kw-2">&</span>field_pat.name) <span class="kw">else </span>{ |
| <a href=#959 id=959 data-nosnippet>959</a> <span class="kw">continue</span>; |
| <a href=#960 id=960 data-nosnippet>960</a> }; |
| <a href=#961 id=961 data-nosnippet>961</a> <span class="kw">let </span><span class="kw-2">mut </span>p = place.clone(); |
| <a href=#962 id=962 data-nosnippet>962</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::PatId(arg)); |
| <a href=#963 id=963 data-nosnippet>963</a> p.projections.push(ProjectionElem::Field(Either::Left(FieldId { |
| <a href=#964 id=964 data-nosnippet>964</a> parent: variant, |
| <a href=#965 id=965 data-nosnippet>965</a> local_id, |
| <a href=#966 id=966 data-nosnippet>966</a> }))); |
| <a href=#967 id=967 data-nosnippet>967</a> <span class="self">self</span>.consume_with_pat(p, arg); |
| <a href=#968 id=968 data-nosnippet>968</a> <span class="self">self</span>.current_capture_span_stack.pop(); |
| <a href=#969 id=969 data-nosnippet>969</a> } |
| <a href=#970 id=970 data-nosnippet>970</a> } |
| <a href=#971 id=971 data-nosnippet>971</a> } |
| <a href=#972 id=972 data-nosnippet>972</a> } |
| <a href=#973 id=973 data-nosnippet>973</a> Pat::Range { .. } | Pat::Slice { .. } | Pat::ConstBlock(<span class="kw">_</span>) | Pat::Lit(<span class="kw">_</span>) => { |
| <a href=#974 id=974 data-nosnippet>974</a> <span class="self">self</span>.consume_place(place) |
| <a href=#975 id=975 data-nosnippet>975</a> } |
| <a href=#976 id=976 data-nosnippet>976</a> Pat::Path(path) => { |
| <a href=#977 id=977 data-nosnippet>977</a> <span class="kw">if </span><span class="self">self</span>.inside_assignment { |
| <a href=#978 id=978 data-nosnippet>978</a> <span class="self">self</span>.mutate_path_pat(path, tgt_pat); |
| <a href=#979 id=979 data-nosnippet>979</a> } |
| <a href=#980 id=980 data-nosnippet>980</a> <span class="self">self</span>.consume_place(place); |
| <a href=#981 id=981 data-nosnippet>981</a> } |
| <a href=#982 id=982 data-nosnippet>982</a> <span class="kw-2">&</span>Pat::Bind { id, subpat: <span class="kw">_ </span>} => { |
| <a href=#983 id=983 data-nosnippet>983</a> <span class="kw">let </span>mode = <span class="self">self</span>.result.binding_modes[tgt_pat]; |
| <a href=#984 id=984 data-nosnippet>984</a> <span class="kw">let </span>capture_kind = <span class="kw">match </span>mode { |
| <a href=#985 id=985 data-nosnippet>985</a> BindingMode::Move => { |
| <a href=#986 id=986 data-nosnippet>986</a> <span class="self">self</span>.consume_place(place); |
| <a href=#987 id=987 data-nosnippet>987</a> <span class="kw">break </span><span class="lifetime">'reset_span_stack</span>; |
| <a href=#988 id=988 data-nosnippet>988</a> } |
| <a href=#989 id=989 data-nosnippet>989</a> BindingMode::Ref(Mutability::Not) => BorrowKind::Shared, |
| <a href=#990 id=990 data-nosnippet>990</a> BindingMode::Ref(Mutability::Mut) => { |
| <a href=#991 id=991 data-nosnippet>991</a> BorrowKind::Mut { kind: MutBorrowKind::Default } |
| <a href=#992 id=992 data-nosnippet>992</a> } |
| <a href=#993 id=993 data-nosnippet>993</a> }; |
| <a href=#994 id=994 data-nosnippet>994</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::BindingId(id)); |
| <a href=#995 id=995 data-nosnippet>995</a> <span class="self">self</span>.add_capture(place, CaptureKind::ByRef(capture_kind)); |
| <a href=#996 id=996 data-nosnippet>996</a> <span class="self">self</span>.current_capture_span_stack.pop(); |
| <a href=#997 id=997 data-nosnippet>997</a> } |
| <a href=#998 id=998 data-nosnippet>998</a> Pat::TupleStruct { path: <span class="kw">_</span>, args, ellipsis } => { |
| <a href=#999 id=999 data-nosnippet>999</a> <span class="kw">let </span><span class="prelude-val">Some</span>(variant) = <span class="self">self</span>.result.variant_resolution_for_pat(tgt_pat) <span class="kw">else </span>{ |
| <a href=#1000 id=1000 data-nosnippet>1000</a> <span class="kw">break </span><span class="lifetime">'reset_span_stack</span>; |
| <a href=#1001 id=1001 data-nosnippet>1001</a> }; |
| <a href=#1002 id=1002 data-nosnippet>1002</a> <span class="kw">match </span>variant { |
| <a href=#1003 id=1003 data-nosnippet>1003</a> VariantId::EnumVariantId(<span class="kw">_</span>) | VariantId::UnionId(<span class="kw">_</span>) => { |
| <a href=#1004 id=1004 data-nosnippet>1004</a> <span class="self">self</span>.consume_place(place) |
| <a href=#1005 id=1005 data-nosnippet>1005</a> } |
| <a href=#1006 id=1006 data-nosnippet>1006</a> VariantId::StructId(s) => { |
| <a href=#1007 id=1007 data-nosnippet>1007</a> <span class="kw">let </span>vd = s.fields(<span class="self">self</span>.db); |
| <a href=#1008 id=1008 data-nosnippet>1008</a> <span class="kw">let </span>(al, ar) = |
| <a href=#1009 id=1009 data-nosnippet>1009</a> args.split_at(ellipsis.map_or(args.len(), |it| it <span class="kw">as </span>usize)); |
| <a href=#1010 id=1010 data-nosnippet>1010</a> <span class="kw">let </span>fields = vd.fields().iter(); |
| <a href=#1011 id=1011 data-nosnippet>1011</a> <span class="kw">let </span>it = al |
| <a href=#1012 id=1012 data-nosnippet>1012</a> .iter() |
| <a href=#1013 id=1013 data-nosnippet>1013</a> .zip(fields.clone()) |
| <a href=#1014 id=1014 data-nosnippet>1014</a> .chain(ar.iter().rev().zip(fields.rev())); |
| <a href=#1015 id=1015 data-nosnippet>1015</a> <span class="kw">for </span>(<span class="kw-2">&</span>arg, (i, <span class="kw">_</span>)) <span class="kw">in </span>it { |
| <a href=#1016 id=1016 data-nosnippet>1016</a> <span class="kw">let </span><span class="kw-2">mut </span>p = place.clone(); |
| <a href=#1017 id=1017 data-nosnippet>1017</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::PatId(arg)); |
| <a href=#1018 id=1018 data-nosnippet>1018</a> p.projections.push(ProjectionElem::Field(Either::Left(FieldId { |
| <a href=#1019 id=1019 data-nosnippet>1019</a> parent: variant, |
| <a href=#1020 id=1020 data-nosnippet>1020</a> local_id: i, |
| <a href=#1021 id=1021 data-nosnippet>1021</a> }))); |
| <a href=#1022 id=1022 data-nosnippet>1022</a> <span class="self">self</span>.consume_with_pat(p, arg); |
| <a href=#1023 id=1023 data-nosnippet>1023</a> <span class="self">self</span>.current_capture_span_stack.pop(); |
| <a href=#1024 id=1024 data-nosnippet>1024</a> } |
| <a href=#1025 id=1025 data-nosnippet>1025</a> } |
| <a href=#1026 id=1026 data-nosnippet>1026</a> } |
| <a href=#1027 id=1027 data-nosnippet>1027</a> } |
| <a href=#1028 id=1028 data-nosnippet>1028</a> Pat::Ref { pat, mutability: <span class="kw">_ </span>} => { |
| <a href=#1029 id=1029 data-nosnippet>1029</a> <span class="self">self</span>.current_capture_span_stack.push(MirSpan::PatId(tgt_pat)); |
| <a href=#1030 id=1030 data-nosnippet>1030</a> place.projections.push(ProjectionElem::Deref); |
| <a href=#1031 id=1031 data-nosnippet>1031</a> <span class="self">self</span>.consume_with_pat(place, <span class="kw-2">*</span>pat); |
| <a href=#1032 id=1032 data-nosnippet>1032</a> <span class="self">self</span>.current_capture_span_stack.pop(); |
| <a href=#1033 id=1033 data-nosnippet>1033</a> } |
| <a href=#1034 id=1034 data-nosnippet>1034</a> Pat::Box { .. } => (), <span class="comment">// not supported |
| <a href=#1035 id=1035 data-nosnippet>1035</a> </span><span class="kw-2">&</span>Pat::Expr(expr) => { |
| <a href=#1036 id=1036 data-nosnippet>1036</a> <span class="self">self</span>.consume_place(place); |
| <a href=#1037 id=1037 data-nosnippet>1037</a> <span class="kw">let </span>pat_capture_span_stack = mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_capture_span_stack); |
| <a href=#1038 id=1038 data-nosnippet>1038</a> <span class="kw">let </span>old_inside_assignment = mem::replace(<span class="kw-2">&mut </span><span class="self">self</span>.inside_assignment, <span class="bool-val">false</span>); |
| <a href=#1039 id=1039 data-nosnippet>1039</a> <span class="kw">let </span>lhs_place = <span class="self">self</span>.place_of_expr(expr); |
| <a href=#1040 id=1040 data-nosnippet>1040</a> <span class="self">self</span>.mutate_expr(expr, lhs_place); |
| <a href=#1041 id=1041 data-nosnippet>1041</a> <span class="self">self</span>.inside_assignment = old_inside_assignment; |
| <a href=#1042 id=1042 data-nosnippet>1042</a> <span class="self">self</span>.current_capture_span_stack = pat_capture_span_stack; |
| <a href=#1043 id=1043 data-nosnippet>1043</a> } |
| <a href=#1044 id=1044 data-nosnippet>1044</a> } |
| <a href=#1045 id=1045 data-nosnippet>1045</a> } |
| <a href=#1046 id=1046 data-nosnippet>1046</a> <span class="self">self</span>.current_capture_span_stack |
| <a href=#1047 id=1047 data-nosnippet>1047</a> .truncate(<span class="self">self</span>.current_capture_span_stack.len() - adjustments_count); |
| <a href=#1048 id=1048 data-nosnippet>1048</a> } |
| <a href=#1049 id=1049 data-nosnippet>1049</a> |
| <a href=#1050 id=1050 data-nosnippet>1050</a> <span class="kw">fn </span>consume_exprs(<span class="kw-2">&mut </span><span class="self">self</span>, exprs: <span class="kw">impl </span>Iterator<Item = ExprId>) { |
| <a href=#1051 id=1051 data-nosnippet>1051</a> <span class="kw">for </span>expr <span class="kw">in </span>exprs { |
| <a href=#1052 id=1052 data-nosnippet>1052</a> <span class="self">self</span>.consume_expr(expr); |
| <a href=#1053 id=1053 data-nosnippet>1053</a> } |
| <a href=#1054 id=1054 data-nosnippet>1054</a> } |
| <a href=#1055 id=1055 data-nosnippet>1055</a> |
| <a href=#1056 id=1056 data-nosnippet>1056</a> <span class="kw">fn </span>closure_kind(<span class="kw-2">&</span><span class="self">self</span>) -> FnTrait { |
| <a href=#1057 id=1057 data-nosnippet>1057</a> <span class="kw">let </span><span class="kw-2">mut </span>r = FnTrait::Fn; |
| <a href=#1058 id=1058 data-nosnippet>1058</a> <span class="kw">for </span>it <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.current_captures { |
| <a href=#1059 id=1059 data-nosnippet>1059</a> r = cmp::min( |
| <a href=#1060 id=1060 data-nosnippet>1060</a> r, |
| <a href=#1061 id=1061 data-nosnippet>1061</a> <span class="kw">match </span><span class="kw-2">&</span>it.kind { |
| <a href=#1062 id=1062 data-nosnippet>1062</a> CaptureKind::ByRef(BorrowKind::Mut { .. }) => FnTrait::FnMut, |
| <a href=#1063 id=1063 data-nosnippet>1063</a> CaptureKind::ByRef(BorrowKind::Shallow | BorrowKind::Shared) => FnTrait::Fn, |
| <a href=#1064 id=1064 data-nosnippet>1064</a> CaptureKind::ByValue => FnTrait::FnOnce, |
| <a href=#1065 id=1065 data-nosnippet>1065</a> }, |
| <a href=#1066 id=1066 data-nosnippet>1066</a> ) |
| <a href=#1067 id=1067 data-nosnippet>1067</a> } |
| <a href=#1068 id=1068 data-nosnippet>1068</a> r |
| <a href=#1069 id=1069 data-nosnippet>1069</a> } |
| <a href=#1070 id=1070 data-nosnippet>1070</a> |
| <a href=#1071 id=1071 data-nosnippet>1071</a> <span class="kw">fn </span>analyze_closure(<span class="kw-2">&mut </span><span class="self">self</span>, closure: InternedClosureId) -> FnTrait { |
| <a href=#1072 id=1072 data-nosnippet>1072</a> <span class="kw">let </span>InternedClosure(<span class="kw">_</span>, root) = <span class="self">self</span>.db.lookup_intern_closure(closure); |
| <a href=#1073 id=1073 data-nosnippet>1073</a> <span class="self">self</span>.current_closure = <span class="prelude-val">Some</span>(closure); |
| <a href=#1074 id=1074 data-nosnippet>1074</a> <span class="kw">let </span>Expr::Closure { body, capture_by, .. } = <span class="kw-2">&</span><span class="self">self</span>.body[root] <span class="kw">else </span>{ |
| <a href=#1075 id=1075 data-nosnippet>1075</a> <span class="macro">unreachable!</span>(<span class="string">"Closure expression id is always closure"</span>); |
| <a href=#1076 id=1076 data-nosnippet>1076</a> }; |
| <a href=#1077 id=1077 data-nosnippet>1077</a> <span class="self">self</span>.consume_expr(<span class="kw-2">*</span>body); |
| <a href=#1078 id=1078 data-nosnippet>1078</a> <span class="kw">for </span>item <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.current_captures { |
| <a href=#1079 id=1079 data-nosnippet>1079</a> <span class="kw">if </span><span class="macro">matches!</span>( |
| <a href=#1080 id=1080 data-nosnippet>1080</a> item.kind, |
| <a href=#1081 id=1081 data-nosnippet>1081</a> CaptureKind::ByRef(BorrowKind::Mut { |
| <a href=#1082 id=1082 data-nosnippet>1082</a> kind: MutBorrowKind::Default | MutBorrowKind::TwoPhasedBorrow |
| <a href=#1083 id=1083 data-nosnippet>1083</a> }) |
| <a href=#1084 id=1084 data-nosnippet>1084</a> ) && !item.place.projections.contains(<span class="kw-2">&</span>ProjectionElem::Deref) |
| <a href=#1085 id=1085 data-nosnippet>1085</a> { |
| <a href=#1086 id=1086 data-nosnippet>1086</a> <span class="comment">// FIXME: remove the `mutated_bindings_in_closure` completely and add proper fake reads in |
| <a href=#1087 id=1087 data-nosnippet>1087</a> // MIR. I didn't do that due duplicate diagnostics. |
| <a href=#1088 id=1088 data-nosnippet>1088</a> </span><span class="self">self</span>.result.mutated_bindings_in_closure.insert(item.place.local); |
| <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>.restrict_precision_for_unsafe(); |
| <a href=#1092 id=1092 data-nosnippet>1092</a> <span class="comment">// `closure_kind` should be done before adjust_for_move_closure |
| <a href=#1093 id=1093 data-nosnippet>1093</a> // If there exists pre-deduced kind of a closure, use it instead of one determined by capture, as rustc does. |
| <a href=#1094 id=1094 data-nosnippet>1094</a> // rustc also does diagnostics here if the latter is not a subtype of the former. |
| <a href=#1095 id=1095 data-nosnippet>1095</a> </span><span class="kw">let </span>closure_kind = <span class="self">self |
| <a href=#1096 id=1096 data-nosnippet>1096</a> </span>.result |
| <a href=#1097 id=1097 data-nosnippet>1097</a> .closure_info |
| <a href=#1098 id=1098 data-nosnippet>1098</a> .get(<span class="kw-2">&</span>closure) |
| <a href=#1099 id=1099 data-nosnippet>1099</a> .map_or_else(|| <span class="self">self</span>.closure_kind(), |info| info.<span class="number">1</span>); |
| <a href=#1100 id=1100 data-nosnippet>1100</a> <span class="kw">match </span>capture_by { |
| <a href=#1101 id=1101 data-nosnippet>1101</a> CaptureBy::Value => <span class="self">self</span>.adjust_for_move_closure(), |
| <a href=#1102 id=1102 data-nosnippet>1102</a> CaptureBy::Ref => (), |
| <a href=#1103 id=1103 data-nosnippet>1103</a> } |
| <a href=#1104 id=1104 data-nosnippet>1104</a> <span class="self">self</span>.minimize_captures(); |
| <a href=#1105 id=1105 data-nosnippet>1105</a> <span class="self">self</span>.strip_captures_ref_span(); |
| <a href=#1106 id=1106 data-nosnippet>1106</a> <span class="kw">let </span>result = mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_captures); |
| <a href=#1107 id=1107 data-nosnippet>1107</a> <span class="kw">let </span>captures = result.into_iter().map(|it| it.with_ty(<span class="self">self</span>)).collect::<Vec<<span class="kw">_</span>>>(); |
| <a href=#1108 id=1108 data-nosnippet>1108</a> <span class="self">self</span>.result.closure_info.insert(closure, (captures, closure_kind)); |
| <a href=#1109 id=1109 data-nosnippet>1109</a> closure_kind |
| <a href=#1110 id=1110 data-nosnippet>1110</a> } |
| <a href=#1111 id=1111 data-nosnippet>1111</a> |
| <a href=#1112 id=1112 data-nosnippet>1112</a> <span class="kw">fn </span>strip_captures_ref_span(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#1113 id=1113 data-nosnippet>1113</a> <span class="comment">// FIXME: Borrow checker won't allow without this. |
| <a href=#1114 id=1114 data-nosnippet>1114</a> </span><span class="kw">let </span><span class="kw-2">mut </span>captures = std::mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.current_captures); |
| <a href=#1115 id=1115 data-nosnippet>1115</a> <span class="kw">for </span>capture <span class="kw">in </span><span class="kw-2">&mut </span>captures { |
| <a href=#1116 id=1116 data-nosnippet>1116</a> <span class="kw">if </span><span class="macro">matches!</span>(capture.kind, CaptureKind::ByValue) { |
| <a href=#1117 id=1117 data-nosnippet>1117</a> <span class="kw">for </span>span_stack <span class="kw">in </span><span class="kw-2">&mut </span>capture.span_stacks { |
| <a href=#1118 id=1118 data-nosnippet>1118</a> <span class="kw">if </span>span_stack[span_stack.len() - <span class="number">1</span>].is_ref_span(<span class="self">self</span>.body) { |
| <a href=#1119 id=1119 data-nosnippet>1119</a> span_stack.truncate(span_stack.len() - <span class="number">1</span>); |
| <a href=#1120 id=1120 data-nosnippet>1120</a> } |
| <a href=#1121 id=1121 data-nosnippet>1121</a> } |
| <a href=#1122 id=1122 data-nosnippet>1122</a> } |
| <a href=#1123 id=1123 data-nosnippet>1123</a> } |
| <a href=#1124 id=1124 data-nosnippet>1124</a> <span class="self">self</span>.current_captures = captures; |
| <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="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>infer_closures(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#1128 id=1128 data-nosnippet>1128</a> <span class="kw">let </span>deferred_closures = <span class="self">self</span>.sort_closures(); |
| <a href=#1129 id=1129 data-nosnippet>1129</a> <span class="kw">for </span>(closure, exprs) <span class="kw">in </span>deferred_closures.into_iter().rev() { |
| <a href=#1130 id=1130 data-nosnippet>1130</a> <span class="self">self</span>.current_captures = <span class="macro">vec!</span>[]; |
| <a href=#1131 id=1131 data-nosnippet>1131</a> <span class="kw">let </span>kind = <span class="self">self</span>.analyze_closure(closure); |
| <a href=#1132 id=1132 data-nosnippet>1132</a> |
| <a href=#1133 id=1133 data-nosnippet>1133</a> <span class="kw">for </span>(derefed_callee, callee_ty, params, expr) <span class="kw">in </span>exprs { |
| <a href=#1134 id=1134 data-nosnippet>1134</a> <span class="kw">if let </span><span class="kw-2">&</span>Expr::Call { callee, .. } = <span class="kw-2">&</span><span class="self">self</span>.body[expr] { |
| <a href=#1135 id=1135 data-nosnippet>1135</a> <span class="kw">let </span><span class="kw-2">mut </span>adjustments = |
| <a href=#1136 id=1136 data-nosnippet>1136</a> <span class="self">self</span>.result.expr_adjustments.remove(<span class="kw-2">&</span>callee).unwrap_or_default().into_vec(); |
| <a href=#1137 id=1137 data-nosnippet>1137</a> <span class="self">self</span>.write_fn_trait_method_resolution( |
| <a href=#1138 id=1138 data-nosnippet>1138</a> kind, |
| <a href=#1139 id=1139 data-nosnippet>1139</a> derefed_callee, |
| <a href=#1140 id=1140 data-nosnippet>1140</a> <span class="kw-2">&mut </span>adjustments, |
| <a href=#1141 id=1141 data-nosnippet>1141</a> callee_ty, |
| <a href=#1142 id=1142 data-nosnippet>1142</a> <span class="kw-2">&</span>params, |
| <a href=#1143 id=1143 data-nosnippet>1143</a> expr, |
| <a href=#1144 id=1144 data-nosnippet>1144</a> ); |
| <a href=#1145 id=1145 data-nosnippet>1145</a> <span class="self">self</span>.result.expr_adjustments.insert(callee, adjustments.into_boxed_slice()); |
| <a href=#1146 id=1146 data-nosnippet>1146</a> } |
| <a href=#1147 id=1147 data-nosnippet>1147</a> } |
| <a href=#1148 id=1148 data-nosnippet>1148</a> } |
| <a href=#1149 id=1149 data-nosnippet>1149</a> } |
| <a href=#1150 id=1150 data-nosnippet>1150</a> |
| <a href=#1151 id=1151 data-nosnippet>1151</a> <span class="doccomment">/// We want to analyze some closures before others, to have a correct analysis: |
| <a href=#1152 id=1152 data-nosnippet>1152</a> /// * We should analyze nested closures before the parent, since the parent should capture some of |
| <a href=#1153 id=1153 data-nosnippet>1153</a> /// the things that its children captures. |
| <a href=#1154 id=1154 data-nosnippet>1154</a> /// * If a closure calls another closure, we need to analyze the callee, to find out how we should |
| <a href=#1155 id=1155 data-nosnippet>1155</a> /// capture it (e.g. by move for FnOnce) |
| <a href=#1156 id=1156 data-nosnippet>1156</a> /// |
| <a href=#1157 id=1157 data-nosnippet>1157</a> /// These dependencies are collected in the main inference. We do a topological sort in this function. It |
| <a href=#1158 id=1158 data-nosnippet>1158</a> /// will consume the `deferred_closures` field and return its content in a sorted vector. |
| <a href=#1159 id=1159 data-nosnippet>1159</a> </span><span class="kw">fn </span>sort_closures( |
| <a href=#1160 id=1160 data-nosnippet>1160</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#1161 id=1161 data-nosnippet>1161</a> ) -> Vec<(InternedClosureId, Vec<(Ty<<span class="lifetime">'db</span>>, Ty<<span class="lifetime">'db</span>>, Vec<Ty<<span class="lifetime">'db</span>>>, ExprId)>)> { |
| <a href=#1162 id=1162 data-nosnippet>1162</a> <span class="kw">let </span><span class="kw-2">mut </span>deferred_closures = mem::take(<span class="kw-2">&mut </span><span class="self">self</span>.deferred_closures); |
| <a href=#1163 id=1163 data-nosnippet>1163</a> <span class="kw">let </span><span class="kw-2">mut </span>dependents_count: FxHashMap<InternedClosureId, usize> = |
| <a href=#1164 id=1164 data-nosnippet>1164</a> deferred_closures.keys().map(|it| (<span class="kw-2">*</span>it, <span class="number">0</span>)).collect(); |
| <a href=#1165 id=1165 data-nosnippet>1165</a> <span class="kw">for </span>deps <span class="kw">in </span><span class="self">self</span>.closure_dependencies.values() { |
| <a href=#1166 id=1166 data-nosnippet>1166</a> <span class="kw">for </span>dep <span class="kw">in </span>deps { |
| <a href=#1167 id=1167 data-nosnippet>1167</a> <span class="kw-2">*</span>dependents_count.entry(<span class="kw-2">*</span>dep).or_default() += <span class="number">1</span>; |
| <a href=#1168 id=1168 data-nosnippet>1168</a> } |
| <a href=#1169 id=1169 data-nosnippet>1169</a> } |
| <a href=#1170 id=1170 data-nosnippet>1170</a> <span class="kw">let </span><span class="kw-2">mut </span>queue: Vec<<span class="kw">_</span>> = |
| <a href=#1171 id=1171 data-nosnippet>1171</a> deferred_closures.keys().copied().filter(|<span class="kw-2">&</span>it| dependents_count[<span class="kw-2">&</span>it] == <span class="number">0</span>).collect(); |
| <a href=#1172 id=1172 data-nosnippet>1172</a> <span class="kw">let </span><span class="kw-2">mut </span>result = <span class="macro">vec!</span>[]; |
| <a href=#1173 id=1173 data-nosnippet>1173</a> <span class="kw">while let </span><span class="prelude-val">Some</span>(it) = queue.pop() { |
| <a href=#1174 id=1174 data-nosnippet>1174</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(d) = deferred_closures.remove(<span class="kw-2">&</span>it) { |
| <a href=#1175 id=1175 data-nosnippet>1175</a> result.push((it, d)); |
| <a href=#1176 id=1176 data-nosnippet>1176</a> } |
| <a href=#1177 id=1177 data-nosnippet>1177</a> <span class="kw">for </span><span class="kw-2">&</span>dep <span class="kw">in </span><span class="self">self</span>.closure_dependencies.get(<span class="kw-2">&</span>it).into_iter().flat_map(|it| it.iter()) { |
| <a href=#1178 id=1178 data-nosnippet>1178</a> <span class="kw">let </span>cnt = dependents_count.get_mut(<span class="kw-2">&</span>dep).unwrap(); |
| <a href=#1179 id=1179 data-nosnippet>1179</a> <span class="kw-2">*</span>cnt -= <span class="number">1</span>; |
| <a href=#1180 id=1180 data-nosnippet>1180</a> <span class="kw">if </span><span class="kw-2">*</span>cnt == <span class="number">0 </span>{ |
| <a href=#1181 id=1181 data-nosnippet>1181</a> queue.push(dep); |
| <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> <span class="macro">assert!</span>(deferred_closures.is_empty(), <span class="string">"we should have analyzed all closures"</span>); |
| <a href=#1186 id=1186 data-nosnippet>1186</a> result |
| <a href=#1187 id=1187 data-nosnippet>1187</a> } |
| <a href=#1188 id=1188 data-nosnippet>1188</a> |
| <a href=#1189 id=1189 data-nosnippet>1189</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>add_current_closure_dependency(<span class="kw-2">&mut </span><span class="self">self</span>, dep: InternedClosureId) { |
| <a href=#1190 id=1190 data-nosnippet>1190</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(c) = <span class="self">self</span>.current_closure |
| <a href=#1191 id=1191 data-nosnippet>1191</a> && !dep_creates_cycle(<span class="kw-2">&</span><span class="self">self</span>.closure_dependencies, <span class="kw-2">&mut </span>FxHashSet::default(), c, dep) |
| <a href=#1192 id=1192 data-nosnippet>1192</a> { |
| <a href=#1193 id=1193 data-nosnippet>1193</a> <span class="self">self</span>.closure_dependencies.entry(c).or_default().push(dep); |
| <a href=#1194 id=1194 data-nosnippet>1194</a> } |
| <a href=#1195 id=1195 data-nosnippet>1195</a> |
| <a href=#1196 id=1196 data-nosnippet>1196</a> <span class="kw">fn </span>dep_creates_cycle( |
| <a href=#1197 id=1197 data-nosnippet>1197</a> closure_dependencies: <span class="kw-2">&</span>FxHashMap<InternedClosureId, Vec<InternedClosureId>>, |
| <a href=#1198 id=1198 data-nosnippet>1198</a> visited: <span class="kw-2">&mut </span>FxHashSet<InternedClosureId>, |
| <a href=#1199 id=1199 data-nosnippet>1199</a> from: InternedClosureId, |
| <a href=#1200 id=1200 data-nosnippet>1200</a> to: InternedClosureId, |
| <a href=#1201 id=1201 data-nosnippet>1201</a> ) -> bool { |
| <a href=#1202 id=1202 data-nosnippet>1202</a> <span class="kw">if </span>!visited.insert(from) { |
| <a href=#1203 id=1203 data-nosnippet>1203</a> <span class="kw">return </span><span class="bool-val">false</span>; |
| <a href=#1204 id=1204 data-nosnippet>1204</a> } |
| <a href=#1205 id=1205 data-nosnippet>1205</a> |
| <a href=#1206 id=1206 data-nosnippet>1206</a> <span class="kw">if </span>from == to { |
| <a href=#1207 id=1207 data-nosnippet>1207</a> <span class="kw">return </span><span class="bool-val">true</span>; |
| <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> <span class="kw">if let </span><span class="prelude-val">Some</span>(deps) = closure_dependencies.get(<span class="kw-2">&</span>to) { |
| <a href=#1211 id=1211 data-nosnippet>1211</a> <span class="kw">for </span>dep <span class="kw">in </span>deps { |
| <a href=#1212 id=1212 data-nosnippet>1212</a> <span class="kw">if </span>dep_creates_cycle(closure_dependencies, visited, from, <span class="kw-2">*</span>dep) { |
| <a href=#1213 id=1213 data-nosnippet>1213</a> <span class="kw">return </span><span class="bool-val">true</span>; |
| <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> } |
| <a href=#1217 id=1217 data-nosnippet>1217</a> |
| <a href=#1218 id=1218 data-nosnippet>1218</a> <span class="bool-val">false |
| <a href=#1219 id=1219 data-nosnippet>1219</a> </span>} |
| <a href=#1220 id=1220 data-nosnippet>1220</a> } |
| <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="doccomment">/// Call this only when the last span in the stack isn't a split. |
| <a href=#1224 id=1224 data-nosnippet>1224</a></span><span class="kw">fn </span>apply_adjusts_to_place<<span class="lifetime">'db</span>>( |
| <a href=#1225 id=1225 data-nosnippet>1225</a> current_capture_span_stack: <span class="kw-2">&mut </span>Vec<MirSpan>, |
| <a href=#1226 id=1226 data-nosnippet>1226</a> <span class="kw-2">mut </span>r: HirPlace<<span class="lifetime">'db</span>>, |
| <a href=#1227 id=1227 data-nosnippet>1227</a> adjustments: <span class="kw-2">&</span>[Adjustment<<span class="lifetime">'db</span>>], |
| <a href=#1228 id=1228 data-nosnippet>1228</a>) -> <span class="prelude-ty">Option</span><HirPlace<<span class="lifetime">'db</span>>> { |
| <a href=#1229 id=1229 data-nosnippet>1229</a> <span class="kw">let </span>span = <span class="kw-2">*</span>current_capture_span_stack.last().expect(<span class="string">"empty capture span stack"</span>); |
| <a href=#1230 id=1230 data-nosnippet>1230</a> <span class="kw">for </span>adj <span class="kw">in </span>adjustments { |
| <a href=#1231 id=1231 data-nosnippet>1231</a> <span class="kw">match </span><span class="kw-2">&</span>adj.kind { |
| <a href=#1232 id=1232 data-nosnippet>1232</a> Adjust::Deref(<span class="prelude-val">None</span>) => { |
| <a href=#1233 id=1233 data-nosnippet>1233</a> current_capture_span_stack.push(span); |
| <a href=#1234 id=1234 data-nosnippet>1234</a> r.projections.push(ProjectionElem::Deref); |
| <a href=#1235 id=1235 data-nosnippet>1235</a> } |
| <a href=#1236 id=1236 data-nosnippet>1236</a> <span class="kw">_ </span>=> <span class="kw">return </span><span class="prelude-val">None</span>, |
| <a href=#1237 id=1237 data-nosnippet>1237</a> } |
| <a href=#1238 id=1238 data-nosnippet>1238</a> } |
| <a href=#1239 id=1239 data-nosnippet>1239</a> <span class="prelude-val">Some</span>(r) |
| <a href=#1240 id=1240 data-nosnippet>1240</a>}</code></pre></div></section></main></body></html> |
