| <!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/next_solver/normalize.rs`."><title>normalize.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-e56847b5.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="1.91.1 (ed61e7d7e 2025-11-07)" data-channel="1.91.1" data-search-js="search-e256b49e.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-6dc2a7f3.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/next_solver/</div>normalize.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span>rustc_next_trait_solver::placeholder::BoundVarReplacer; |
| <a href=#2 id=2 data-nosnippet>2</a><span class="kw">use </span>rustc_type_ir::{ |
| <a href=#3 id=3 data-nosnippet>3</a> AliasRelationDirection, FallibleTypeFolder, Flags, Interner, TermKind, TypeFoldable, |
| <a href=#4 id=4 data-nosnippet>4</a> TypeFolder, TypeSuperFoldable, TypeVisitableExt, UniverseIndex, |
| <a href=#5 id=5 data-nosnippet>5</a> inherent::{IntoKind, Term <span class="kw">as _</span>}, |
| <a href=#6 id=6 data-nosnippet>6</a>}; |
| <a href=#7 id=7 data-nosnippet>7</a> |
| <a href=#8 id=8 data-nosnippet>8</a><span class="kw">use </span><span class="kw">crate</span>::next_solver::{ |
| <a href=#9 id=9 data-nosnippet>9</a> Binder, Const, ConstKind, DbInterner, Goal, ParamEnv, Predicate, PredicateKind, Term, Ty, |
| <a href=#10 id=10 data-nosnippet>10</a> TyKind, |
| <a href=#11 id=11 data-nosnippet>11</a> fulfill::{FulfillmentCtxt, NextSolverError}, |
| <a href=#12 id=12 data-nosnippet>12</a> infer::{ |
| <a href=#13 id=13 data-nosnippet>13</a> InferCtxt, |
| <a href=#14 id=14 data-nosnippet>14</a> at::At, |
| <a href=#15 id=15 data-nosnippet>15</a> traits::{Obligation, ObligationCause}, |
| <a href=#16 id=16 data-nosnippet>16</a> }, |
| <a href=#17 id=17 data-nosnippet>17</a> util::PlaceholderReplacer, |
| <a href=#18 id=18 data-nosnippet>18</a>}; |
| <a href=#19 id=19 data-nosnippet>19</a> |
| <a href=#20 id=20 data-nosnippet>20</a><span class="doccomment">/// Deeply normalize all aliases in `value`. This does not handle inference and expects |
| <a href=#21 id=21 data-nosnippet>21</a>/// its input to be already fully resolved. |
| <a href=#22 id=22 data-nosnippet>22</a></span><span class="kw">pub fn </span>deeply_normalize<<span class="lifetime">'db</span>, T>(at: At<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>, value: T) -> <span class="prelude-ty">Result</span><T, Vec<NextSolverError<<span class="lifetime">'db</span>>>> |
| <a href=#23 id=23 data-nosnippet>23</a><span class="kw">where |
| <a href=#24 id=24 data-nosnippet>24</a> </span>T: TypeFoldable<DbInterner<<span class="lifetime">'db</span>>>, |
| <a href=#25 id=25 data-nosnippet>25</a>{ |
| <a href=#26 id=26 data-nosnippet>26</a> <span class="macro">assert!</span>(!value.has_escaping_bound_vars()); |
| <a href=#27 id=27 data-nosnippet>27</a> deeply_normalize_with_skipped_universes(at, value, <span class="macro">vec!</span>[]) |
| <a href=#28 id=28 data-nosnippet>28</a>} |
| <a href=#29 id=29 data-nosnippet>29</a> |
| <a href=#30 id=30 data-nosnippet>30</a><span class="doccomment">/// Deeply normalize all aliases in `value`. This does not handle inference and expects |
| <a href=#31 id=31 data-nosnippet>31</a>/// its input to be already fully resolved. |
| <a href=#32 id=32 data-nosnippet>32</a>/// |
| <a href=#33 id=33 data-nosnippet>33</a>/// Additionally takes a list of universes which represents the binders which have been |
| <a href=#34 id=34 data-nosnippet>34</a>/// entered before passing `value` to the function. This is currently needed for |
| <a href=#35 id=35 data-nosnippet>35</a>/// `normalize_erasing_regions`, which skips binders as it walks through a type. |
| <a href=#36 id=36 data-nosnippet>36</a></span><span class="kw">pub fn </span>deeply_normalize_with_skipped_universes<<span class="lifetime">'db</span>, T>( |
| <a href=#37 id=37 data-nosnippet>37</a> at: At<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>, |
| <a href=#38 id=38 data-nosnippet>38</a> value: T, |
| <a href=#39 id=39 data-nosnippet>39</a> universes: Vec<<span class="prelude-ty">Option</span><UniverseIndex>>, |
| <a href=#40 id=40 data-nosnippet>40</a>) -> <span class="prelude-ty">Result</span><T, Vec<NextSolverError<<span class="lifetime">'db</span>>>> |
| <a href=#41 id=41 data-nosnippet>41</a><span class="kw">where |
| <a href=#42 id=42 data-nosnippet>42</a> </span>T: TypeFoldable<DbInterner<<span class="lifetime">'db</span>>>, |
| <a href=#43 id=43 data-nosnippet>43</a>{ |
| <a href=#44 id=44 data-nosnippet>44</a> <span class="kw">let </span>(value, coroutine_goals) = |
| <a href=#45 id=45 data-nosnippet>45</a> deeply_normalize_with_skipped_universes_and_ambiguous_coroutine_goals( |
| <a href=#46 id=46 data-nosnippet>46</a> at, value, universes, |
| <a href=#47 id=47 data-nosnippet>47</a> )<span class="question-mark">?</span>; |
| <a href=#48 id=48 data-nosnippet>48</a> <span class="macro">assert_eq!</span>(coroutine_goals, <span class="macro">vec!</span>[]); |
| <a href=#49 id=49 data-nosnippet>49</a> |
| <a href=#50 id=50 data-nosnippet>50</a> <span class="prelude-val">Ok</span>(value) |
| <a href=#51 id=51 data-nosnippet>51</a>} |
| <a href=#52 id=52 data-nosnippet>52</a> |
| <a href=#53 id=53 data-nosnippet>53</a><span class="doccomment">/// Deeply normalize all aliases in `value`. This does not handle inference and expects |
| <a href=#54 id=54 data-nosnippet>54</a>/// its input to be already fully resolved. |
| <a href=#55 id=55 data-nosnippet>55</a>/// |
| <a href=#56 id=56 data-nosnippet>56</a>/// Additionally takes a list of universes which represents the binders which have been |
| <a href=#57 id=57 data-nosnippet>57</a>/// entered before passing `value` to the function. This is currently needed for |
| <a href=#58 id=58 data-nosnippet>58</a>/// `normalize_erasing_regions`, which skips binders as it walks through a type. |
| <a href=#59 id=59 data-nosnippet>59</a>/// |
| <a href=#60 id=60 data-nosnippet>60</a>/// This returns a set of stalled obligations involving coroutines if the typing mode of |
| <a href=#61 id=61 data-nosnippet>61</a>/// the underlying infcx has any stalled coroutine def ids. |
| <a href=#62 id=62 data-nosnippet>62</a></span><span class="kw">pub fn </span>deeply_normalize_with_skipped_universes_and_ambiguous_coroutine_goals<<span class="lifetime">'db</span>, T>( |
| <a href=#63 id=63 data-nosnippet>63</a> at: At<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>>, |
| <a href=#64 id=64 data-nosnippet>64</a> value: T, |
| <a href=#65 id=65 data-nosnippet>65</a> universes: Vec<<span class="prelude-ty">Option</span><UniverseIndex>>, |
| <a href=#66 id=66 data-nosnippet>66</a>) -> <span class="prelude-ty">Result</span><(T, Vec<Goal<<span class="lifetime">'db</span>, Predicate<<span class="lifetime">'db</span>>>>), Vec<NextSolverError<<span class="lifetime">'db</span>>>> |
| <a href=#67 id=67 data-nosnippet>67</a><span class="kw">where |
| <a href=#68 id=68 data-nosnippet>68</a> </span>T: TypeFoldable<DbInterner<<span class="lifetime">'db</span>>>, |
| <a href=#69 id=69 data-nosnippet>69</a>{ |
| <a href=#70 id=70 data-nosnippet>70</a> <span class="kw">let </span>fulfill_cx = FulfillmentCtxt::new(at.infcx); |
| <a href=#71 id=71 data-nosnippet>71</a> <span class="kw">let </span><span class="kw-2">mut </span>folder = NormalizationFolder { |
| <a href=#72 id=72 data-nosnippet>72</a> at, |
| <a href=#73 id=73 data-nosnippet>73</a> fulfill_cx, |
| <a href=#74 id=74 data-nosnippet>74</a> depth: <span class="number">0</span>, |
| <a href=#75 id=75 data-nosnippet>75</a> universes, |
| <a href=#76 id=76 data-nosnippet>76</a> stalled_coroutine_goals: <span class="macro">vec!</span>[], |
| <a href=#77 id=77 data-nosnippet>77</a> }; |
| <a href=#78 id=78 data-nosnippet>78</a> <span class="kw">let </span>value = value.try_fold_with(<span class="kw-2">&mut </span>folder)<span class="question-mark">?</span>; |
| <a href=#79 id=79 data-nosnippet>79</a> <span class="kw">let </span>errors = folder.fulfill_cx.evaluate_obligations_error_on_ambiguity(at.infcx); |
| <a href=#80 id=80 data-nosnippet>80</a> <span class="kw">if </span>errors.is_empty() { <span class="prelude-val">Ok</span>((value, folder.stalled_coroutine_goals)) } <span class="kw">else </span>{ <span class="prelude-val">Err</span>(errors) } |
| <a href=#81 id=81 data-nosnippet>81</a>} |
| <a href=#82 id=82 data-nosnippet>82</a> |
| <a href=#83 id=83 data-nosnippet>83</a><span class="kw">struct </span>NormalizationFolder<<span class="lifetime">'me</span>, <span class="lifetime">'db</span>> { |
| <a href=#84 id=84 data-nosnippet>84</a> at: At<<span class="lifetime">'me</span>, <span class="lifetime">'db</span>>, |
| <a href=#85 id=85 data-nosnippet>85</a> fulfill_cx: FulfillmentCtxt<<span class="lifetime">'db</span>>, |
| <a href=#86 id=86 data-nosnippet>86</a> depth: usize, |
| <a href=#87 id=87 data-nosnippet>87</a> universes: Vec<<span class="prelude-ty">Option</span><UniverseIndex>>, |
| <a href=#88 id=88 data-nosnippet>88</a> stalled_coroutine_goals: Vec<Goal<<span class="lifetime">'db</span>, Predicate<<span class="lifetime">'db</span>>>>, |
| <a href=#89 id=89 data-nosnippet>89</a>} |
| <a href=#90 id=90 data-nosnippet>90</a> |
| <a href=#91 id=91 data-nosnippet>91</a><span class="kw">impl</span><<span class="lifetime">'db</span>> NormalizationFolder<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>> { |
| <a href=#92 id=92 data-nosnippet>92</a> <span class="kw">fn </span>normalize_alias_term( |
| <a href=#93 id=93 data-nosnippet>93</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#94 id=94 data-nosnippet>94</a> alias_term: Term<<span class="lifetime">'db</span>>, |
| <a href=#95 id=95 data-nosnippet>95</a> ) -> <span class="prelude-ty">Result</span><Term<<span class="lifetime">'db</span>>, Vec<NextSolverError<<span class="lifetime">'db</span>>>> { |
| <a href=#96 id=96 data-nosnippet>96</a> <span class="kw">let </span>infcx = <span class="self">self</span>.at.infcx; |
| <a href=#97 id=97 data-nosnippet>97</a> <span class="kw">let </span>interner = infcx.interner; |
| <a href=#98 id=98 data-nosnippet>98</a> <span class="kw">let </span>recursion_limit = interner.recursion_limit(); |
| <a href=#99 id=99 data-nosnippet>99</a> |
| <a href=#100 id=100 data-nosnippet>100</a> <span class="self">self</span>.depth += <span class="number">1</span>; |
| <a href=#101 id=101 data-nosnippet>101</a> |
| <a href=#102 id=102 data-nosnippet>102</a> <span class="kw">let </span>infer_term = infcx.next_term_var_of_kind(alias_term); |
| <a href=#103 id=103 data-nosnippet>103</a> <span class="kw">let </span>obligation = Obligation::new( |
| <a href=#104 id=104 data-nosnippet>104</a> interner, |
| <a href=#105 id=105 data-nosnippet>105</a> <span class="self">self</span>.at.cause.clone(), |
| <a href=#106 id=106 data-nosnippet>106</a> <span class="self">self</span>.at.param_env, |
| <a href=#107 id=107 data-nosnippet>107</a> PredicateKind::AliasRelate(alias_term, infer_term, AliasRelationDirection::Equate), |
| <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">if </span><span class="self">self</span>.depth > recursion_limit { |
| <a href=#111 id=111 data-nosnippet>111</a> <span class="comment">// let term = alias_term.to_alias_term().unwrap(); |
| <a href=#112 id=112 data-nosnippet>112</a> // self.at.infcx.err_ctxt().report_overflow_error( |
| <a href=#113 id=113 data-nosnippet>113</a> // OverflowCause::DeeplyNormalize(term), |
| <a href=#114 id=114 data-nosnippet>114</a> // self.at.cause.span, |
| <a href=#115 id=115 data-nosnippet>115</a> // true, |
| <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><span class="kw">return </span><span class="prelude-val">Err</span>(<span class="macro">vec!</span>[NextSolverError::Overflow(obligation)]); |
| <a href=#119 id=119 data-nosnippet>119</a> } |
| <a href=#120 id=120 data-nosnippet>120</a> |
| <a href=#121 id=121 data-nosnippet>121</a> <span class="self">self</span>.fulfill_cx.register_predicate_obligation(infcx, obligation); |
| <a href=#122 id=122 data-nosnippet>122</a> <span class="self">self</span>.select_all_and_stall_coroutine_predicates()<span class="question-mark">?</span>; |
| <a href=#123 id=123 data-nosnippet>123</a> |
| <a href=#124 id=124 data-nosnippet>124</a> <span class="comment">// Alias is guaranteed to be fully structurally resolved, |
| <a href=#125 id=125 data-nosnippet>125</a> // so we can super fold here. |
| <a href=#126 id=126 data-nosnippet>126</a> </span><span class="kw">let </span>term = infcx.resolve_vars_if_possible(infer_term); |
| <a href=#127 id=127 data-nosnippet>127</a> <span class="comment">// super-folding the `term` will directly fold the `Ty` or `Const` so |
| <a href=#128 id=128 data-nosnippet>128</a> // we have to match on the term and super-fold them manually. |
| <a href=#129 id=129 data-nosnippet>129</a> </span><span class="kw">let </span>result = <span class="kw">match </span>term.kind() { |
| <a href=#130 id=130 data-nosnippet>130</a> TermKind::Ty(ty) => ty.try_super_fold_with(<span class="self">self</span>)<span class="question-mark">?</span>.into(), |
| <a href=#131 id=131 data-nosnippet>131</a> TermKind::Const(ct) => ct.try_super_fold_with(<span class="self">self</span>)<span class="question-mark">?</span>.into(), |
| <a href=#132 id=132 data-nosnippet>132</a> }; |
| <a href=#133 id=133 data-nosnippet>133</a> <span class="self">self</span>.depth -= <span class="number">1</span>; |
| <a href=#134 id=134 data-nosnippet>134</a> <span class="prelude-val">Ok</span>(result) |
| <a href=#135 id=135 data-nosnippet>135</a> } |
| <a href=#136 id=136 data-nosnippet>136</a> |
| <a href=#137 id=137 data-nosnippet>137</a> <span class="kw">fn </span>select_all_and_stall_coroutine_predicates( |
| <a href=#138 id=138 data-nosnippet>138</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#139 id=139 data-nosnippet>139</a> ) -> <span class="prelude-ty">Result</span><(), Vec<NextSolverError<<span class="lifetime">'db</span>>>> { |
| <a href=#140 id=140 data-nosnippet>140</a> <span class="kw">let </span>errors = <span class="self">self</span>.fulfill_cx.try_evaluate_obligations(<span class="self">self</span>.at.infcx); |
| <a href=#141 id=141 data-nosnippet>141</a> <span class="kw">if </span>!errors.is_empty() { |
| <a href=#142 id=142 data-nosnippet>142</a> <span class="kw">return </span><span class="prelude-val">Err</span>(errors); |
| <a href=#143 id=143 data-nosnippet>143</a> } |
| <a href=#144 id=144 data-nosnippet>144</a> |
| <a href=#145 id=145 data-nosnippet>145</a> <span class="self">self</span>.stalled_coroutine_goals.extend( |
| <a href=#146 id=146 data-nosnippet>146</a> <span class="self">self</span>.fulfill_cx |
| <a href=#147 id=147 data-nosnippet>147</a> .drain_stalled_obligations_for_coroutines(<span class="self">self</span>.at.infcx) |
| <a href=#148 id=148 data-nosnippet>148</a> .into_iter() |
| <a href=#149 id=149 data-nosnippet>149</a> .map(|obl| obl.as_goal()), |
| <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> <span class="kw">let </span>errors = <span class="self">self</span>.fulfill_cx.collect_remaining_errors(<span class="self">self</span>.at.infcx); |
| <a href=#153 id=153 data-nosnippet>153</a> <span class="kw">if </span>!errors.is_empty() { |
| <a href=#154 id=154 data-nosnippet>154</a> <span class="kw">return </span><span class="prelude-val">Err</span>(errors); |
| <a href=#155 id=155 data-nosnippet>155</a> } |
| <a href=#156 id=156 data-nosnippet>156</a> |
| <a href=#157 id=157 data-nosnippet>157</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#158 id=158 data-nosnippet>158</a> } |
| <a href=#159 id=159 data-nosnippet>159</a>} |
| <a href=#160 id=160 data-nosnippet>160</a> |
| <a href=#161 id=161 data-nosnippet>161</a><span class="kw">impl</span><<span class="lifetime">'db</span>> FallibleTypeFolder<DbInterner<<span class="lifetime">'db</span>>> <span class="kw">for </span>NormalizationFolder<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>> { |
| <a href=#162 id=162 data-nosnippet>162</a> <span class="kw">type </span>Error = Vec<NextSolverError<<span class="lifetime">'db</span>>>; |
| <a href=#163 id=163 data-nosnippet>163</a> |
| <a href=#164 id=164 data-nosnippet>164</a> <span class="kw">fn </span>cx(<span class="kw-2">&</span><span class="self">self</span>) -> DbInterner<<span class="lifetime">'db</span>> { |
| <a href=#165 id=165 data-nosnippet>165</a> <span class="self">self</span>.at.infcx.interner |
| <a href=#166 id=166 data-nosnippet>166</a> } |
| <a href=#167 id=167 data-nosnippet>167</a> |
| <a href=#168 id=168 data-nosnippet>168</a> <span class="kw">fn </span>try_fold_binder<T: TypeFoldable<DbInterner<<span class="lifetime">'db</span>>>>( |
| <a href=#169 id=169 data-nosnippet>169</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#170 id=170 data-nosnippet>170</a> t: Binder<<span class="lifetime">'db</span>, T>, |
| <a href=#171 id=171 data-nosnippet>171</a> ) -> <span class="prelude-ty">Result</span><Binder<<span class="lifetime">'db</span>, T>, <span class="self">Self</span>::Error> { |
| <a href=#172 id=172 data-nosnippet>172</a> <span class="self">self</span>.universes.push(<span class="prelude-val">None</span>); |
| <a href=#173 id=173 data-nosnippet>173</a> <span class="kw">let </span>t = t.try_super_fold_with(<span class="self">self</span>)<span class="question-mark">?</span>; |
| <a href=#174 id=174 data-nosnippet>174</a> <span class="self">self</span>.universes.pop(); |
| <a href=#175 id=175 data-nosnippet>175</a> <span class="prelude-val">Ok</span>(t) |
| <a href=#176 id=176 data-nosnippet>176</a> } |
| <a href=#177 id=177 data-nosnippet>177</a> |
| <a href=#178 id=178 data-nosnippet>178</a> <span class="kw">fn </span>try_fold_ty(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> <span class="prelude-ty">Result</span><Ty<<span class="lifetime">'db</span>>, <span class="self">Self</span>::Error> { |
| <a href=#179 id=179 data-nosnippet>179</a> <span class="kw">let </span>infcx = <span class="self">self</span>.at.infcx; |
| <a href=#180 id=180 data-nosnippet>180</a> <span class="macro">debug_assert_eq!</span>(ty, infcx.shallow_resolve(ty)); |
| <a href=#181 id=181 data-nosnippet>181</a> <span class="kw">if </span>!ty.has_aliases() { |
| <a href=#182 id=182 data-nosnippet>182</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(ty); |
| <a href=#183 id=183 data-nosnippet>183</a> } |
| <a href=#184 id=184 data-nosnippet>184</a> |
| <a href=#185 id=185 data-nosnippet>185</a> <span class="kw">let </span>TyKind::Alias(..) = ty.kind() <span class="kw">else </span>{ <span class="kw">return </span>ty.try_super_fold_with(<span class="self">self</span>) }; |
| <a href=#186 id=186 data-nosnippet>186</a> |
| <a href=#187 id=187 data-nosnippet>187</a> <span class="kw">if </span>ty.has_escaping_bound_vars() { |
| <a href=#188 id=188 data-nosnippet>188</a> <span class="kw">let </span>(ty, mapped_regions, mapped_types, mapped_consts) = |
| <a href=#189 id=189 data-nosnippet>189</a> BoundVarReplacer::replace_bound_vars(infcx, <span class="kw-2">&mut </span><span class="self">self</span>.universes, ty); |
| <a href=#190 id=190 data-nosnippet>190</a> <span class="kw">let </span>result = <span class="self">self</span>.normalize_alias_term(ty.into())<span class="question-mark">?</span>.expect_type(); |
| <a href=#191 id=191 data-nosnippet>191</a> <span class="prelude-val">Ok</span>(PlaceholderReplacer::replace_placeholders( |
| <a href=#192 id=192 data-nosnippet>192</a> infcx, |
| <a href=#193 id=193 data-nosnippet>193</a> mapped_regions, |
| <a href=#194 id=194 data-nosnippet>194</a> mapped_types, |
| <a href=#195 id=195 data-nosnippet>195</a> mapped_consts, |
| <a href=#196 id=196 data-nosnippet>196</a> <span class="kw-2">&</span><span class="self">self</span>.universes, |
| <a href=#197 id=197 data-nosnippet>197</a> result, |
| <a href=#198 id=198 data-nosnippet>198</a> )) |
| <a href=#199 id=199 data-nosnippet>199</a> } <span class="kw">else </span>{ |
| <a href=#200 id=200 data-nosnippet>200</a> <span class="prelude-val">Ok</span>(<span class="self">self</span>.normalize_alias_term(ty.into())<span class="question-mark">?</span>.expect_type()) |
| <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">fn </span>try_fold_const(<span class="kw-2">&mut </span><span class="self">self</span>, ct: Const<<span class="lifetime">'db</span>>) -> <span class="prelude-ty">Result</span><Const<<span class="lifetime">'db</span>>, <span class="self">Self</span>::Error> { |
| <a href=#205 id=205 data-nosnippet>205</a> <span class="kw">let </span>infcx = <span class="self">self</span>.at.infcx; |
| <a href=#206 id=206 data-nosnippet>206</a> <span class="macro">debug_assert_eq!</span>(ct, infcx.shallow_resolve_const(ct)); |
| <a href=#207 id=207 data-nosnippet>207</a> <span class="kw">if </span>!ct.has_aliases() { |
| <a href=#208 id=208 data-nosnippet>208</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(ct); |
| <a href=#209 id=209 data-nosnippet>209</a> } |
| <a href=#210 id=210 data-nosnippet>210</a> |
| <a href=#211 id=211 data-nosnippet>211</a> <span class="kw">let </span>ConstKind::Unevaluated(..) = ct.kind() <span class="kw">else </span>{ <span class="kw">return </span>ct.try_super_fold_with(<span class="self">self</span>) }; |
| <a href=#212 id=212 data-nosnippet>212</a> |
| <a href=#213 id=213 data-nosnippet>213</a> <span class="kw">if </span>ct.has_escaping_bound_vars() { |
| <a href=#214 id=214 data-nosnippet>214</a> <span class="kw">let </span>(ct, mapped_regions, mapped_types, mapped_consts) = |
| <a href=#215 id=215 data-nosnippet>215</a> BoundVarReplacer::replace_bound_vars(infcx, <span class="kw-2">&mut </span><span class="self">self</span>.universes, ct); |
| <a href=#216 id=216 data-nosnippet>216</a> <span class="kw">let </span>result = <span class="self">self</span>.normalize_alias_term(ct.into())<span class="question-mark">?</span>.expect_const(); |
| <a href=#217 id=217 data-nosnippet>217</a> <span class="prelude-val">Ok</span>(PlaceholderReplacer::replace_placeholders( |
| <a href=#218 id=218 data-nosnippet>218</a> infcx, |
| <a href=#219 id=219 data-nosnippet>219</a> mapped_regions, |
| <a href=#220 id=220 data-nosnippet>220</a> mapped_types, |
| <a href=#221 id=221 data-nosnippet>221</a> mapped_consts, |
| <a href=#222 id=222 data-nosnippet>222</a> <span class="kw-2">&</span><span class="self">self</span>.universes, |
| <a href=#223 id=223 data-nosnippet>223</a> result, |
| <a href=#224 id=224 data-nosnippet>224</a> )) |
| <a href=#225 id=225 data-nosnippet>225</a> } <span class="kw">else </span>{ |
| <a href=#226 id=226 data-nosnippet>226</a> <span class="prelude-val">Ok</span>(<span class="self">self</span>.normalize_alias_term(ct.into())<span class="question-mark">?</span>.expect_const()) |
| <a href=#227 id=227 data-nosnippet>227</a> } |
| <a href=#228 id=228 data-nosnippet>228</a> } |
| <a href=#229 id=229 data-nosnippet>229</a>} |
| <a href=#230 id=230 data-nosnippet>230</a> |
| <a href=#231 id=231 data-nosnippet>231</a><span class="comment">// Deeply normalize a value and return it |
| <a href=#232 id=232 data-nosnippet>232</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>deeply_normalize_for_diagnostics<<span class="lifetime">'db</span>, T: TypeFoldable<DbInterner<<span class="lifetime">'db</span>>>>( |
| <a href=#233 id=233 data-nosnippet>233</a> infcx: <span class="kw-2">&</span>InferCtxt<<span class="lifetime">'db</span>>, |
| <a href=#234 id=234 data-nosnippet>234</a> param_env: ParamEnv<<span class="lifetime">'db</span>>, |
| <a href=#235 id=235 data-nosnippet>235</a> t: T, |
| <a href=#236 id=236 data-nosnippet>236</a>) -> T { |
| <a href=#237 id=237 data-nosnippet>237</a> t.fold_with(<span class="kw-2">&mut </span>DeeplyNormalizeForDiagnosticsFolder { |
| <a href=#238 id=238 data-nosnippet>238</a> at: infcx.at(<span class="kw-2">&</span>ObligationCause::dummy(), param_env), |
| <a href=#239 id=239 data-nosnippet>239</a> }) |
| <a href=#240 id=240 data-nosnippet>240</a>} |
| <a href=#241 id=241 data-nosnippet>241</a> |
| <a href=#242 id=242 data-nosnippet>242</a><span class="kw">struct </span>DeeplyNormalizeForDiagnosticsFolder<<span class="lifetime">'a</span>, <span class="lifetime">'tcx</span>> { |
| <a href=#243 id=243 data-nosnippet>243</a> at: At<<span class="lifetime">'a</span>, <span class="lifetime">'tcx</span>>, |
| <a href=#244 id=244 data-nosnippet>244</a>} |
| <a href=#245 id=245 data-nosnippet>245</a> |
| <a href=#246 id=246 data-nosnippet>246</a><span class="kw">impl</span><<span class="lifetime">'db</span>> TypeFolder<DbInterner<<span class="lifetime">'db</span>>> <span class="kw">for </span>DeeplyNormalizeForDiagnosticsFolder<<span class="lifetime">'_</span>, <span class="lifetime">'db</span>> { |
| <a href=#247 id=247 data-nosnippet>247</a> <span class="kw">fn </span>cx(<span class="kw-2">&</span><span class="self">self</span>) -> DbInterner<<span class="lifetime">'db</span>> { |
| <a href=#248 id=248 data-nosnippet>248</a> <span class="self">self</span>.at.infcx.interner |
| <a href=#249 id=249 data-nosnippet>249</a> } |
| <a href=#250 id=250 data-nosnippet>250</a> |
| <a href=#251 id=251 data-nosnippet>251</a> <span class="kw">fn </span>fold_ty(<span class="kw-2">&mut </span><span class="self">self</span>, ty: Ty<<span class="lifetime">'db</span>>) -> Ty<<span class="lifetime">'db</span>> { |
| <a href=#252 id=252 data-nosnippet>252</a> <span class="kw">let </span>infcx = <span class="self">self</span>.at.infcx; |
| <a href=#253 id=253 data-nosnippet>253</a> <span class="kw">let </span>result: <span class="prelude-ty">Result</span><<span class="kw">_</span>, Vec<NextSolverError<<span class="lifetime">'db</span>>>> = infcx.commit_if_ok(|<span class="kw">_</span>| { |
| <a href=#254 id=254 data-nosnippet>254</a> deeply_normalize_with_skipped_universes_and_ambiguous_coroutine_goals( |
| <a href=#255 id=255 data-nosnippet>255</a> <span class="self">self</span>.at, |
| <a href=#256 id=256 data-nosnippet>256</a> ty, |
| <a href=#257 id=257 data-nosnippet>257</a> <span class="macro">vec!</span>[<span class="prelude-val">None</span>; ty.outer_exclusive_binder().as_usize()], |
| <a href=#258 id=258 data-nosnippet>258</a> ) |
| <a href=#259 id=259 data-nosnippet>259</a> }); |
| <a href=#260 id=260 data-nosnippet>260</a> <span class="kw">match </span>result { |
| <a href=#261 id=261 data-nosnippet>261</a> <span class="prelude-val">Ok</span>((ty, <span class="kw">_</span>)) => ty, |
| <a href=#262 id=262 data-nosnippet>262</a> <span class="prelude-val">Err</span>(<span class="kw">_</span>) => ty.super_fold_with(<span class="self">self</span>), |
| <a href=#263 id=263 data-nosnippet>263</a> } |
| <a href=#264 id=264 data-nosnippet>264</a> } |
| <a href=#265 id=265 data-nosnippet>265</a> |
| <a href=#266 id=266 data-nosnippet>266</a> <span class="kw">fn </span>fold_const(<span class="kw-2">&mut </span><span class="self">self</span>, ct: Const<<span class="lifetime">'db</span>>) -> Const<<span class="lifetime">'db</span>> { |
| <a href=#267 id=267 data-nosnippet>267</a> <span class="kw">let </span>infcx = <span class="self">self</span>.at.infcx; |
| <a href=#268 id=268 data-nosnippet>268</a> <span class="kw">let </span>result: <span class="prelude-ty">Result</span><<span class="kw">_</span>, Vec<NextSolverError<<span class="lifetime">'db</span>>>> = infcx.commit_if_ok(|<span class="kw">_</span>| { |
| <a href=#269 id=269 data-nosnippet>269</a> deeply_normalize_with_skipped_universes_and_ambiguous_coroutine_goals( |
| <a href=#270 id=270 data-nosnippet>270</a> <span class="self">self</span>.at, |
| <a href=#271 id=271 data-nosnippet>271</a> ct, |
| <a href=#272 id=272 data-nosnippet>272</a> <span class="macro">vec!</span>[<span class="prelude-val">None</span>; ct.outer_exclusive_binder().as_usize()], |
| <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="kw">match </span>result { |
| <a href=#276 id=276 data-nosnippet>276</a> <span class="prelude-val">Ok</span>((ct, <span class="kw">_</span>)) => ct, |
| <a href=#277 id=277 data-nosnippet>277</a> <span class="prelude-val">Err</span>(<span class="kw">_</span>) => ct.super_fold_with(<span class="self">self</span>), |
| <a href=#278 id=278 data-nosnippet>278</a> } |
| <a href=#279 id=279 data-nosnippet>279</a> } |
| <a href=#280 id=280 data-nosnippet>280</a>}</code></pre></div></section></main></body></html> |
