| <!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/ide-ssr/src/matching.rs`."><title>matching.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-77263533.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="ide_ssr" data-themes="" data-resource-suffix="" data-rustdoc-version="1.94.0 (4a4ef493e 2026-03-02)" data-channel="1.94.0" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-b897f86f.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-7bab91a1.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-ffcac47a.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">ide_ssr/</div>matching.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! This module is responsible for matching a search pattern against a node in the AST. In the |
| <a href=#2 id=2 data-nosnippet>2</a>//! process of matching, placeholder values are recorded. |
| <a href=#3 id=3 data-nosnippet>3</a> |
| <a href=#4 id=4 data-nosnippet>4</a></span><span class="kw">use </span>crate::{ |
| <a href=#5 id=5 data-nosnippet>5</a> SsrMatches, |
| <a href=#6 id=6 data-nosnippet>6</a> parsing::{Constraint, NodeKind, Placeholder, Var}, |
| <a href=#7 id=7 data-nosnippet>7</a> resolving::{ResolvedPattern, ResolvedRule, UfcsCallInfo}, |
| <a href=#8 id=8 data-nosnippet>8</a>}; |
| <a href=#9 id=9 data-nosnippet>9</a><span class="kw">use </span>hir::{FileRange, FindPathConfig, Semantics}; |
| <a href=#10 id=10 data-nosnippet>10</a><span class="kw">use </span>ide_db::{FxHashMap, base_db::RootQueryDb}; |
| <a href=#11 id=11 data-nosnippet>11</a><span class="kw">use </span>std::{cell::Cell, iter::Peekable}; |
| <a href=#12 id=12 data-nosnippet>12</a><span class="kw">use </span>syntax::{ |
| <a href=#13 id=13 data-nosnippet>13</a> SmolStr, SyntaxElement, SyntaxElementChildren, SyntaxKind, SyntaxNode, SyntaxToken, |
| <a href=#14 id=14 data-nosnippet>14</a> ast::{<span class="self">self</span>, AstNode, AstToken, HasGenericArgs}, |
| <a href=#15 id=15 data-nosnippet>15</a>}; |
| <a href=#16 id=16 data-nosnippet>16</a> |
| <a href=#17 id=17 data-nosnippet>17</a><span class="comment">// Creates a match error. If we're currently attempting to match some code that we thought we were |
| <a href=#18 id=18 data-nosnippet>18</a>// going to match, as indicated by the --debug-snippet flag, then populate the reason field. |
| <a href=#19 id=19 data-nosnippet>19</a></span><span class="macro">macro_rules!</span> match_error { |
| <a href=#20 id=20 data-nosnippet>20</a> (<span class="macro-nonterminal">$e</span>:expr) => {{ |
| <a href=#21 id=21 data-nosnippet>21</a> MatchFailed { |
| <a href=#22 id=22 data-nosnippet>22</a> reason: <span class="kw">if </span>recording_match_fail_reasons() { |
| <a href=#23 id=23 data-nosnippet>23</a> <span class="prelude-val">Some</span>(<span class="macro">format!</span>(<span class="string">"{}"</span>, <span class="macro-nonterminal">$e</span>)) |
| <a href=#24 id=24 data-nosnippet>24</a> } <span class="kw">else </span>{ |
| <a href=#25 id=25 data-nosnippet>25</a> <span class="prelude-val">None |
| <a href=#26 id=26 data-nosnippet>26</a> </span>} |
| <a href=#27 id=27 data-nosnippet>27</a> } |
| <a href=#28 id=28 data-nosnippet>28</a> }}; |
| <a href=#29 id=29 data-nosnippet>29</a> (<span class="macro-nonterminal">$fmt</span>:expr, $(<span class="macro-nonterminal">$arg</span>:tt)+) => {{ |
| <a href=#30 id=30 data-nosnippet>30</a> MatchFailed { |
| <a href=#31 id=31 data-nosnippet>31</a> reason: <span class="kw">if </span>recording_match_fail_reasons() { |
| <a href=#32 id=32 data-nosnippet>32</a> <span class="prelude-val">Some</span>(<span class="macro">format!</span>(<span class="macro-nonterminal">$fmt</span>, $(<span class="macro-nonterminal">$arg</span>)+)) |
| <a href=#33 id=33 data-nosnippet>33</a> } <span class="kw">else </span>{ |
| <a href=#34 id=34 data-nosnippet>34</a> <span class="prelude-val">None |
| <a href=#35 id=35 data-nosnippet>35</a> </span>} |
| <a href=#36 id=36 data-nosnippet>36</a> } |
| <a href=#37 id=37 data-nosnippet>37</a> }}; |
| <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="comment">// Fails the current match attempt, recording the supplied reason if we're recording match fail reasons. |
| <a href=#41 id=41 data-nosnippet>41</a></span><span class="macro">macro_rules!</span> fail_match { |
| <a href=#42 id=42 data-nosnippet>42</a> ($(<span class="macro-nonterminal">$args</span>:tt)<span class="kw-2">*</span>) => {<span class="kw">return </span><span class="prelude-val">Err</span>(<span class="macro">match_error!</span>($(<span class="macro-nonterminal">$args</span>)<span class="kw-2">*</span>))}; |
| <a href=#43 id=43 data-nosnippet>43</a>} |
| <a href=#44 id=44 data-nosnippet>44</a> |
| <a href=#45 id=45 data-nosnippet>45</a><span class="doccomment">/// Information about a match that was found. |
| <a href=#46 id=46 data-nosnippet>46</a></span><span class="attr">#[derive(Debug)] |
| <a href=#47 id=47 data-nosnippet>47</a></span><span class="kw">pub struct </span>Match { |
| <a href=#48 id=48 data-nosnippet>48</a> <span class="kw">pub</span>(<span class="kw">crate</span>) range: FileRange, |
| <a href=#49 id=49 data-nosnippet>49</a> <span class="kw">pub</span>(<span class="kw">crate</span>) matched_node: SyntaxNode, |
| <a href=#50 id=50 data-nosnippet>50</a> <span class="kw">pub</span>(<span class="kw">crate</span>) placeholder_values: FxHashMap<Var, PlaceholderMatch>, |
| <a href=#51 id=51 data-nosnippet>51</a> <span class="kw">pub</span>(<span class="kw">crate</span>) ignored_comments: Vec<ast::Comment>, |
| <a href=#52 id=52 data-nosnippet>52</a> <span class="kw">pub</span>(<span class="kw">crate</span>) rule_index: usize, |
| <a href=#53 id=53 data-nosnippet>53</a> <span class="doccomment">/// The depth of matched_node. |
| <a href=#54 id=54 data-nosnippet>54</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) depth: usize, |
| <a href=#55 id=55 data-nosnippet>55</a> <span class="comment">// Each path in the template rendered for the module in which the match was found. |
| <a href=#56 id=56 data-nosnippet>56</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) rendered_template_paths: FxHashMap<SyntaxNode, hir::ModPath>, |
| <a href=#57 id=57 data-nosnippet>57</a>} |
| <a href=#58 id=58 data-nosnippet>58</a> |
| <a href=#59 id=59 data-nosnippet>59</a><span class="doccomment">/// Information about a placeholder bound in a match. |
| <a href=#60 id=60 data-nosnippet>60</a></span><span class="attr">#[derive(Debug)] |
| <a href=#61 id=61 data-nosnippet>61</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>PlaceholderMatch { |
| <a href=#62 id=62 data-nosnippet>62</a> <span class="kw">pub</span>(<span class="kw">crate</span>) range: FileRange, |
| <a href=#63 id=63 data-nosnippet>63</a> <span class="doccomment">/// More matches, found within `node`. |
| <a href=#64 id=64 data-nosnippet>64</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) inner_matches: SsrMatches, |
| <a href=#65 id=65 data-nosnippet>65</a> <span class="doccomment">/// How many times the code that the placeholder matched needed to be dereferenced. Will only be |
| <a href=#66 id=66 data-nosnippet>66</a> /// non-zero if the placeholder matched to the receiver of a method call. |
| <a href=#67 id=67 data-nosnippet>67</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) autoderef_count: usize, |
| <a href=#68 id=68 data-nosnippet>68</a> <span class="kw">pub</span>(<span class="kw">crate</span>) autoref_kind: ast::SelfParamKind, |
| <a href=#69 id=69 data-nosnippet>69</a>} |
| <a href=#70 id=70 data-nosnippet>70</a> |
| <a href=#71 id=71 data-nosnippet>71</a><span class="attr">#[derive(Debug)] |
| <a href=#72 id=72 data-nosnippet>72</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>MatchFailureReason { |
| <a href=#73 id=73 data-nosnippet>73</a> <span class="kw">pub</span>(<span class="kw">crate</span>) reason: String, |
| <a href=#74 id=74 data-nosnippet>74</a>} |
| <a href=#75 id=75 data-nosnippet>75</a> |
| <a href=#76 id=76 data-nosnippet>76</a><span class="doccomment">/// An "error" indicating that matching failed. Use the fail_match! macro to create and return this. |
| <a href=#77 id=77 data-nosnippet>77</a></span><span class="attr">#[derive(Clone)] |
| <a href=#78 id=78 data-nosnippet>78</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>MatchFailed { |
| <a href=#79 id=79 data-nosnippet>79</a> <span class="doccomment">/// The reason why we failed to match. Only present when debug_active true in call to |
| <a href=#80 id=80 data-nosnippet>80</a> /// `get_match`. |
| <a href=#81 id=81 data-nosnippet>81</a> </span><span class="kw">pub</span>(<span class="kw">crate</span>) reason: <span class="prelude-ty">Option</span><String>, |
| <a href=#82 id=82 data-nosnippet>82</a>} |
| <a href=#83 id=83 data-nosnippet>83</a> |
| <a href=#84 id=84 data-nosnippet>84</a><span class="doccomment">/// Checks if `code` matches the search pattern found in `search_scope`, returning information about |
| <a href=#85 id=85 data-nosnippet>85</a>/// the match, if it does. Since we only do matching in this module and searching is done by the |
| <a href=#86 id=86 data-nosnippet>86</a>/// parent module, we don't populate nested matches. |
| <a href=#87 id=87 data-nosnippet>87</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>get_match<<span class="lifetime">'db</span>>( |
| <a href=#88 id=88 data-nosnippet>88</a> debug_active: bool, |
| <a href=#89 id=89 data-nosnippet>89</a> rule: <span class="kw-2">&</span>ResolvedRule<<span class="lifetime">'db</span>>, |
| <a href=#90 id=90 data-nosnippet>90</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#91 id=91 data-nosnippet>91</a> restrict_range: <span class="kw-2">&</span><span class="prelude-ty">Option</span><FileRange>, |
| <a href=#92 id=92 data-nosnippet>92</a> sema: <span class="kw-2">&</span>Semantics<<span class="lifetime">'db</span>, ide_db::RootDatabase>, |
| <a href=#93 id=93 data-nosnippet>93</a>) -> <span class="prelude-ty">Result</span><Match, MatchFailed> { |
| <a href=#94 id=94 data-nosnippet>94</a> record_match_fails_reasons_scope(debug_active, || { |
| <a href=#95 id=95 data-nosnippet>95</a> Matcher::try_match(rule, code, restrict_range, sema) |
| <a href=#96 id=96 data-nosnippet>96</a> }) |
| <a href=#97 id=97 data-nosnippet>97</a>} |
| <a href=#98 id=98 data-nosnippet>98</a> |
| <a href=#99 id=99 data-nosnippet>99</a><span class="doccomment">/// Checks if our search pattern matches a particular node of the AST. |
| <a href=#100 id=100 data-nosnippet>100</a></span><span class="kw">struct </span>Matcher<<span class="lifetime">'db</span>, <span class="lifetime">'sema</span>> { |
| <a href=#101 id=101 data-nosnippet>101</a> sema: <span class="kw-2">&</span><span class="lifetime">'sema </span>Semantics<<span class="lifetime">'db</span>, ide_db::RootDatabase>, |
| <a href=#102 id=102 data-nosnippet>102</a> <span class="doccomment">/// If any placeholders come from anywhere outside of this range, then the match will be |
| <a href=#103 id=103 data-nosnippet>103</a> /// rejected. |
| <a href=#104 id=104 data-nosnippet>104</a> </span>restrict_range: <span class="prelude-ty">Option</span><FileRange>, |
| <a href=#105 id=105 data-nosnippet>105</a> rule: <span class="kw-2">&</span><span class="lifetime">'sema </span>ResolvedRule<<span class="lifetime">'db</span>>, |
| <a href=#106 id=106 data-nosnippet>106</a>} |
| <a href=#107 id=107 data-nosnippet>107</a> |
| <a href=#108 id=108 data-nosnippet>108</a><span class="doccomment">/// Which phase of matching we're currently performing. We do two phases because most attempted |
| <a href=#109 id=109 data-nosnippet>109</a>/// matches will fail and it means we can defer more expensive checks to the second phase. |
| <a href=#110 id=110 data-nosnippet>110</a></span><span class="kw">enum </span>Phase<<span class="lifetime">'a</span>> { |
| <a href=#111 id=111 data-nosnippet>111</a> <span class="doccomment">/// On the first phase, we perform cheap checks. No state is mutated and nothing is recorded. |
| <a href=#112 id=112 data-nosnippet>112</a> </span>First, |
| <a href=#113 id=113 data-nosnippet>113</a> <span class="doccomment">/// On the second phase, we construct the `Match`. Things like what placeholders bind to is |
| <a href=#114 id=114 data-nosnippet>114</a> /// recorded. |
| <a href=#115 id=115 data-nosnippet>115</a> </span>Second(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Match), |
| <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="kw">impl</span><<span class="lifetime">'db</span>, <span class="lifetime">'sema</span>> Matcher<<span class="lifetime">'db</span>, <span class="lifetime">'sema</span>> { |
| <a href=#119 id=119 data-nosnippet>119</a> <span class="kw">fn </span>try_match( |
| <a href=#120 id=120 data-nosnippet>120</a> rule: <span class="kw-2">&</span>ResolvedRule<<span class="lifetime">'db</span>>, |
| <a href=#121 id=121 data-nosnippet>121</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#122 id=122 data-nosnippet>122</a> restrict_range: <span class="kw-2">&</span><span class="prelude-ty">Option</span><FileRange>, |
| <a href=#123 id=123 data-nosnippet>123</a> sema: <span class="kw-2">&</span><span class="lifetime">'sema </span>Semantics<<span class="lifetime">'db</span>, ide_db::RootDatabase>, |
| <a href=#124 id=124 data-nosnippet>124</a> ) -> <span class="prelude-ty">Result</span><Match, MatchFailed> { |
| <a href=#125 id=125 data-nosnippet>125</a> <span class="kw">let </span>match_state = Matcher { sema, restrict_range: <span class="kw-2">*</span>restrict_range, rule }; |
| <a href=#126 id=126 data-nosnippet>126</a> <span class="comment">// First pass at matching, where we check that node types and idents match. |
| <a href=#127 id=127 data-nosnippet>127</a> </span>match_state.attempt_match_node(<span class="kw-2">&mut </span>Phase::First, <span class="kw-2">&</span>rule.pattern.node, code)<span class="question-mark">?</span>; |
| <a href=#128 id=128 data-nosnippet>128</a> <span class="kw">let </span>file_range = sema |
| <a href=#129 id=129 data-nosnippet>129</a> .original_range_opt(code) |
| <a href=#130 id=130 data-nosnippet>130</a> .ok_or(MatchFailed { reason: <span class="prelude-val">Some</span>(<span class="string">"def site definition"</span>.to_owned()) })<span class="question-mark">?</span>; |
| <a href=#131 id=131 data-nosnippet>131</a> match_state.validate_range(<span class="kw-2">&</span>file_range)<span class="question-mark">?</span>; |
| <a href=#132 id=132 data-nosnippet>132</a> <span class="kw">let </span><span class="kw-2">mut </span>the_match = Match { |
| <a href=#133 id=133 data-nosnippet>133</a> range: file_range, |
| <a href=#134 id=134 data-nosnippet>134</a> matched_node: code.clone(), |
| <a href=#135 id=135 data-nosnippet>135</a> placeholder_values: FxHashMap::default(), |
| <a href=#136 id=136 data-nosnippet>136</a> ignored_comments: Vec::new(), |
| <a href=#137 id=137 data-nosnippet>137</a> rule_index: rule.index, |
| <a href=#138 id=138 data-nosnippet>138</a> depth: <span class="number">0</span>, |
| <a href=#139 id=139 data-nosnippet>139</a> rendered_template_paths: FxHashMap::default(), |
| <a href=#140 id=140 data-nosnippet>140</a> }; |
| <a href=#141 id=141 data-nosnippet>141</a> <span class="comment">// Second matching pass, where we record placeholder matches, ignored comments and maybe do |
| <a href=#142 id=142 data-nosnippet>142</a> // any other more expensive checks that we didn't want to do on the first pass. |
| <a href=#143 id=143 data-nosnippet>143</a> </span>match_state.attempt_match_node( |
| <a href=#144 id=144 data-nosnippet>144</a> <span class="kw-2">&mut </span>Phase::Second(<span class="kw-2">&mut </span>the_match), |
| <a href=#145 id=145 data-nosnippet>145</a> <span class="kw-2">&</span>rule.pattern.node, |
| <a href=#146 id=146 data-nosnippet>146</a> code, |
| <a href=#147 id=147 data-nosnippet>147</a> )<span class="question-mark">?</span>; |
| <a href=#148 id=148 data-nosnippet>148</a> the_match.depth = sema.ancestors_with_macros(the_match.matched_node.clone()).count(); |
| <a href=#149 id=149 data-nosnippet>149</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(template) = <span class="kw-2">&</span>rule.template { |
| <a href=#150 id=150 data-nosnippet>150</a> the_match.render_template_paths(template, sema)<span class="question-mark">?</span>; |
| <a href=#151 id=151 data-nosnippet>151</a> } |
| <a href=#152 id=152 data-nosnippet>152</a> <span class="prelude-val">Ok</span>(the_match) |
| <a href=#153 id=153 data-nosnippet>153</a> } |
| <a href=#154 id=154 data-nosnippet>154</a> |
| <a href=#155 id=155 data-nosnippet>155</a> <span class="doccomment">/// Checks that `range` is within the permitted range if any. This is applicable when we're |
| <a href=#156 id=156 data-nosnippet>156</a> /// processing a macro expansion and we want to fail the match if we're working with a node that |
| <a href=#157 id=157 data-nosnippet>157</a> /// didn't originate from the token tree of the macro call. |
| <a href=#158 id=158 data-nosnippet>158</a> </span><span class="kw">fn </span>validate_range(<span class="kw-2">&</span><span class="self">self</span>, range: <span class="kw-2">&</span>FileRange) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#159 id=159 data-nosnippet>159</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(restrict_range) = <span class="kw-2">&</span><span class="self">self</span>.restrict_range |
| <a href=#160 id=160 data-nosnippet>160</a> && (restrict_range.<span class="macro">file_id !</span>= range.file_id |
| <a href=#161 id=161 data-nosnippet>161</a> || !restrict_range.range.contains_range(range.range)) |
| <a href=#162 id=162 data-nosnippet>162</a> { |
| <a href=#163 id=163 data-nosnippet>163</a> <span class="macro">fail_match!</span>(<span class="string">"Node originated from a macro"</span>); |
| <a href=#164 id=164 data-nosnippet>164</a> } |
| <a href=#165 id=165 data-nosnippet>165</a> <span class="prelude-val">Ok</span>(()) |
| <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>attempt_match_node( |
| <a href=#169 id=169 data-nosnippet>169</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#170 id=170 data-nosnippet>170</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#171 id=171 data-nosnippet>171</a> pattern: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#172 id=172 data-nosnippet>172</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#173 id=173 data-nosnippet>173</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#174 id=174 data-nosnippet>174</a> <span class="comment">// Handle placeholders. |
| <a href=#175 id=175 data-nosnippet>175</a> </span><span class="kw">if let </span><span class="prelude-val">Some</span>(placeholder) = <span class="self">self</span>.get_placeholder_for_node(pattern) { |
| <a href=#176 id=176 data-nosnippet>176</a> <span class="kw">for </span>constraint <span class="kw">in </span><span class="kw-2">&</span>placeholder.constraints { |
| <a href=#177 id=177 data-nosnippet>177</a> <span class="self">self</span>.check_constraint(constraint, code)<span class="question-mark">?</span>; |
| <a href=#178 id=178 data-nosnippet>178</a> } |
| <a href=#179 id=179 data-nosnippet>179</a> <span class="kw">if let </span>Phase::Second(matches_out) = phase { |
| <a href=#180 id=180 data-nosnippet>180</a> <span class="kw">let </span>original_range = <span class="self">self |
| <a href=#181 id=181 data-nosnippet>181</a> </span>.sema |
| <a href=#182 id=182 data-nosnippet>182</a> .original_range_opt(code) |
| <a href=#183 id=183 data-nosnippet>183</a> .ok_or(MatchFailed { reason: <span class="prelude-val">Some</span>(<span class="string">"def site definition"</span>.to_owned()) })<span class="question-mark">?</span>; |
| <a href=#184 id=184 data-nosnippet>184</a> <span class="comment">// We validated the range for the node when we started the match, so the placeholder |
| <a href=#185 id=185 data-nosnippet>185</a> // probably can't fail range validation, but just to be safe... |
| <a href=#186 id=186 data-nosnippet>186</a> </span><span class="self">self</span>.validate_range(<span class="kw-2">&</span>original_range)<span class="question-mark">?</span>; |
| <a href=#187 id=187 data-nosnippet>187</a> matches_out.placeholder_values.insert( |
| <a href=#188 id=188 data-nosnippet>188</a> placeholder.ident.clone(), |
| <a href=#189 id=189 data-nosnippet>189</a> PlaceholderMatch::from_range(original_range), |
| <a href=#190 id=190 data-nosnippet>190</a> ); |
| <a href=#191 id=191 data-nosnippet>191</a> } |
| <a href=#192 id=192 data-nosnippet>192</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| <a href=#193 id=193 data-nosnippet>193</a> } |
| <a href=#194 id=194 data-nosnippet>194</a> <span class="comment">// We allow a UFCS call to match a method call, provided they resolve to the same function. |
| <a href=#195 id=195 data-nosnippet>195</a> </span><span class="kw">if let </span><span class="prelude-val">Some</span>(pattern_ufcs) = <span class="self">self</span>.rule.pattern.ufcs_function_calls.get(pattern) { |
| <a href=#196 id=196 data-nosnippet>196</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(code) = ast::MethodCallExpr::cast(code.clone()) { |
| <a href=#197 id=197 data-nosnippet>197</a> <span class="kw">return </span><span class="self">self</span>.attempt_match_ufcs_to_method_call(phase, pattern_ufcs, <span class="kw-2">&</span>code); |
| <a href=#198 id=198 data-nosnippet>198</a> } |
| <a href=#199 id=199 data-nosnippet>199</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(code) = ast::CallExpr::cast(code.clone()) { |
| <a href=#200 id=200 data-nosnippet>200</a> <span class="kw">return </span><span class="self">self</span>.attempt_match_ufcs_to_ufcs(phase, pattern_ufcs, <span class="kw-2">&</span>code); |
| <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> <span class="kw">if </span>pattern.kind() != code.kind() { |
| <a href=#204 id=204 data-nosnippet>204</a> <span class="macro">fail_match!</span>( |
| <a href=#205 id=205 data-nosnippet>205</a> <span class="string">"Pattern had `{}` ({:?}), code had `{}` ({:?})"</span>, |
| <a href=#206 id=206 data-nosnippet>206</a> pattern.text(), |
| <a href=#207 id=207 data-nosnippet>207</a> pattern.kind(), |
| <a href=#208 id=208 data-nosnippet>208</a> code.text(), |
| <a href=#209 id=209 data-nosnippet>209</a> code.kind() |
| <a href=#210 id=210 data-nosnippet>210</a> ); |
| <a href=#211 id=211 data-nosnippet>211</a> } |
| <a href=#212 id=212 data-nosnippet>212</a> <span class="comment">// Some kinds of nodes have special handling. For everything else, we fall back to default |
| <a href=#213 id=213 data-nosnippet>213</a> // matching. |
| <a href=#214 id=214 data-nosnippet>214</a> </span><span class="kw">match </span>code.kind() { |
| <a href=#215 id=215 data-nosnippet>215</a> SyntaxKind::RECORD_EXPR_FIELD_LIST => { |
| <a href=#216 id=216 data-nosnippet>216</a> <span class="self">self</span>.attempt_match_record_field_list(phase, pattern, code) |
| <a href=#217 id=217 data-nosnippet>217</a> } |
| <a href=#218 id=218 data-nosnippet>218</a> SyntaxKind::TOKEN_TREE => <span class="self">self</span>.attempt_match_token_tree(phase, pattern, code), |
| <a href=#219 id=219 data-nosnippet>219</a> SyntaxKind::PATH => <span class="self">self</span>.attempt_match_path(phase, pattern, code), |
| <a href=#220 id=220 data-nosnippet>220</a> <span class="kw">_ </span>=> <span class="self">self</span>.attempt_match_node_children(phase, pattern, code), |
| <a href=#221 id=221 data-nosnippet>221</a> } |
| <a href=#222 id=222 data-nosnippet>222</a> } |
| <a href=#223 id=223 data-nosnippet>223</a> |
| <a href=#224 id=224 data-nosnippet>224</a> <span class="kw">fn </span>attempt_match_node_children( |
| <a href=#225 id=225 data-nosnippet>225</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#226 id=226 data-nosnippet>226</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#227 id=227 data-nosnippet>227</a> pattern: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#228 id=228 data-nosnippet>228</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#229 id=229 data-nosnippet>229</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#230 id=230 data-nosnippet>230</a> <span class="self">self</span>.attempt_match_sequences( |
| <a href=#231 id=231 data-nosnippet>231</a> phase, |
| <a href=#232 id=232 data-nosnippet>232</a> PatternIterator::new(pattern), |
| <a href=#233 id=233 data-nosnippet>233</a> code.children_with_tokens(), |
| <a href=#234 id=234 data-nosnippet>234</a> ) |
| <a href=#235 id=235 data-nosnippet>235</a> } |
| <a href=#236 id=236 data-nosnippet>236</a> |
| <a href=#237 id=237 data-nosnippet>237</a> <span class="kw">fn </span>attempt_match_sequences( |
| <a href=#238 id=238 data-nosnippet>238</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#239 id=239 data-nosnippet>239</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#240 id=240 data-nosnippet>240</a> pattern_it: PatternIterator, |
| <a href=#241 id=241 data-nosnippet>241</a> <span class="kw-2">mut </span>code_it: SyntaxElementChildren, |
| <a href=#242 id=242 data-nosnippet>242</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#243 id=243 data-nosnippet>243</a> <span class="kw">let </span><span class="kw-2">mut </span>pattern_it = pattern_it.peekable(); |
| <a href=#244 id=244 data-nosnippet>244</a> <span class="kw">loop </span>{ |
| <a href=#245 id=245 data-nosnippet>245</a> <span class="kw">match </span>phase.next_non_trivial(<span class="kw-2">&mut </span>code_it) { |
| <a href=#246 id=246 data-nosnippet>246</a> <span class="prelude-val">None </span>=> { |
| <a href=#247 id=247 data-nosnippet>247</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(p) = pattern_it.next() { |
| <a href=#248 id=248 data-nosnippet>248</a> <span class="macro">fail_match!</span>(<span class="string">"Part of the pattern was unmatched: {:?}"</span>, p); |
| <a href=#249 id=249 data-nosnippet>249</a> } |
| <a href=#250 id=250 data-nosnippet>250</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| <a href=#251 id=251 data-nosnippet>251</a> } |
| <a href=#252 id=252 data-nosnippet>252</a> <span class="prelude-val">Some</span>(SyntaxElement::Token(c)) => { |
| <a href=#253 id=253 data-nosnippet>253</a> <span class="self">self</span>.attempt_match_token(phase, <span class="kw-2">&mut </span>pattern_it, <span class="kw-2">&</span>c)<span class="question-mark">?</span>; |
| <a href=#254 id=254 data-nosnippet>254</a> } |
| <a href=#255 id=255 data-nosnippet>255</a> <span class="prelude-val">Some</span>(SyntaxElement::Node(c)) => <span class="kw">match </span>pattern_it.next() { |
| <a href=#256 id=256 data-nosnippet>256</a> <span class="prelude-val">Some</span>(SyntaxElement::Node(p)) => { |
| <a href=#257 id=257 data-nosnippet>257</a> <span class="self">self</span>.attempt_match_node(phase, <span class="kw-2">&</span>p, <span class="kw-2">&</span>c)<span class="question-mark">?</span>; |
| <a href=#258 id=258 data-nosnippet>258</a> } |
| <a href=#259 id=259 data-nosnippet>259</a> <span class="prelude-val">Some</span>(p) => <span class="macro">fail_match!</span>(<span class="string">"Pattern wanted '{}', code has {}"</span>, p, c.text()), |
| <a href=#260 id=260 data-nosnippet>260</a> <span class="prelude-val">None </span>=> <span class="macro">fail_match!</span>(<span class="string">"Pattern reached end, code has {}"</span>, c.text()), |
| <a href=#261 id=261 data-nosnippet>261</a> }, |
| <a href=#262 id=262 data-nosnippet>262</a> } |
| <a href=#263 id=263 data-nosnippet>263</a> } |
| <a href=#264 id=264 data-nosnippet>264</a> } |
| <a href=#265 id=265 data-nosnippet>265</a> |
| <a href=#266 id=266 data-nosnippet>266</a> <span class="kw">fn </span>attempt_match_token( |
| <a href=#267 id=267 data-nosnippet>267</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#268 id=268 data-nosnippet>268</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#269 id=269 data-nosnippet>269</a> pattern: <span class="kw-2">&mut </span>Peekable<PatternIterator>, |
| <a href=#270 id=270 data-nosnippet>270</a> code: <span class="kw-2">&</span>syntax::SyntaxToken, |
| <a href=#271 id=271 data-nosnippet>271</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#272 id=272 data-nosnippet>272</a> phase.record_ignored_comments(code); |
| <a href=#273 id=273 data-nosnippet>273</a> <span class="comment">// Ignore whitespace and comments. |
| <a href=#274 id=274 data-nosnippet>274</a> </span><span class="kw">if </span>code.kind().is_trivia() { |
| <a href=#275 id=275 data-nosnippet>275</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| <a href=#276 id=276 data-nosnippet>276</a> } |
| <a href=#277 id=277 data-nosnippet>277</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(SyntaxElement::Token(p)) = pattern.peek() { |
| <a href=#278 id=278 data-nosnippet>278</a> <span class="comment">// If the code has a comma and the pattern is about to close something, then accept the |
| <a href=#279 id=279 data-nosnippet>279</a> // comma without advancing the pattern. i.e. ignore trailing commas. |
| <a href=#280 id=280 data-nosnippet>280</a> </span><span class="kw">if </span>code.kind() == SyntaxKind::COMMA && is_closing_token(p.kind()) { |
| <a href=#281 id=281 data-nosnippet>281</a> <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| <a href=#282 id=282 data-nosnippet>282</a> } |
| <a href=#283 id=283 data-nosnippet>283</a> <span class="comment">// Conversely, if the pattern has a comma and the code doesn't, skip that part of the |
| <a href=#284 id=284 data-nosnippet>284</a> // pattern and continue to match the code. |
| <a href=#285 id=285 data-nosnippet>285</a> </span><span class="kw">if </span>p.kind() == SyntaxKind::COMMA && is_closing_token(code.kind()) { |
| <a href=#286 id=286 data-nosnippet>286</a> pattern.next(); |
| <a href=#287 id=287 data-nosnippet>287</a> } |
| <a href=#288 id=288 data-nosnippet>288</a> } |
| <a href=#289 id=289 data-nosnippet>289</a> <span class="comment">// Consume an element from the pattern and make sure it matches. |
| <a href=#290 id=290 data-nosnippet>290</a> </span><span class="kw">match </span>pattern.next() { |
| <a href=#291 id=291 data-nosnippet>291</a> <span class="prelude-val">Some</span>(SyntaxElement::Token(p)) => { |
| <a href=#292 id=292 data-nosnippet>292</a> <span class="kw">if </span>p.kind() != code.kind() || p.text() != code.text() { |
| <a href=#293 id=293 data-nosnippet>293</a> <span class="macro">fail_match!</span>( |
| <a href=#294 id=294 data-nosnippet>294</a> <span class="string">"Pattern wanted token '{}' ({:?}), but code had token '{}' ({:?})"</span>, |
| <a href=#295 id=295 data-nosnippet>295</a> p.text(), |
| <a href=#296 id=296 data-nosnippet>296</a> p.kind(), |
| <a href=#297 id=297 data-nosnippet>297</a> code.text(), |
| <a href=#298 id=298 data-nosnippet>298</a> code.kind() |
| <a href=#299 id=299 data-nosnippet>299</a> ) |
| <a href=#300 id=300 data-nosnippet>300</a> } |
| <a href=#301 id=301 data-nosnippet>301</a> } |
| <a href=#302 id=302 data-nosnippet>302</a> <span class="prelude-val">Some</span>(SyntaxElement::Node(p)) => { |
| <a href=#303 id=303 data-nosnippet>303</a> <span class="comment">// Not sure if this is actually reachable. |
| <a href=#304 id=304 data-nosnippet>304</a> </span><span class="macro">fail_match!</span>( |
| <a href=#305 id=305 data-nosnippet>305</a> <span class="string">"Pattern wanted {:?}, but code had token '{}' ({:?})"</span>, |
| <a href=#306 id=306 data-nosnippet>306</a> p, |
| <a href=#307 id=307 data-nosnippet>307</a> code.text(), |
| <a href=#308 id=308 data-nosnippet>308</a> code.kind() |
| <a href=#309 id=309 data-nosnippet>309</a> ); |
| <a href=#310 id=310 data-nosnippet>310</a> } |
| <a href=#311 id=311 data-nosnippet>311</a> <span class="prelude-val">None </span>=> { |
| <a href=#312 id=312 data-nosnippet>312</a> <span class="macro">fail_match!</span>(<span class="string">"Pattern exhausted, while code remains: `{}`"</span>, code.text()); |
| <a href=#313 id=313 data-nosnippet>313</a> } |
| <a href=#314 id=314 data-nosnippet>314</a> } |
| <a href=#315 id=315 data-nosnippet>315</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#316 id=316 data-nosnippet>316</a> } |
| <a href=#317 id=317 data-nosnippet>317</a> |
| <a href=#318 id=318 data-nosnippet>318</a> <span class="attr">#[allow(clippy::only_used_in_recursion)] |
| <a href=#319 id=319 data-nosnippet>319</a> </span><span class="kw">fn </span>check_constraint( |
| <a href=#320 id=320 data-nosnippet>320</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#321 id=321 data-nosnippet>321</a> constraint: <span class="kw-2">&</span>Constraint, |
| <a href=#322 id=322 data-nosnippet>322</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#323 id=323 data-nosnippet>323</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#324 id=324 data-nosnippet>324</a> <span class="kw">match </span>constraint { |
| <a href=#325 id=325 data-nosnippet>325</a> Constraint::Kind(kind) => { |
| <a href=#326 id=326 data-nosnippet>326</a> kind.matches(code)<span class="question-mark">?</span>; |
| <a href=#327 id=327 data-nosnippet>327</a> } |
| <a href=#328 id=328 data-nosnippet>328</a> Constraint::Not(sub) => { |
| <a href=#329 id=329 data-nosnippet>329</a> <span class="kw">if </span><span class="self">self</span>.check_constraint(sub, code).is_ok() { |
| <a href=#330 id=330 data-nosnippet>330</a> <span class="macro">fail_match!</span>(<span class="string">"Constraint {:?} failed for '{}'"</span>, constraint, code.text()); |
| <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="prelude-val">Ok</span>(()) |
| <a href=#335 id=335 data-nosnippet>335</a> } |
| <a href=#336 id=336 data-nosnippet>336</a> |
| <a href=#337 id=337 data-nosnippet>337</a> <span class="doccomment">/// Paths are matched based on whether they refer to the same thing, even if they're written |
| <a href=#338 id=338 data-nosnippet>338</a> /// differently. |
| <a href=#339 id=339 data-nosnippet>339</a> </span><span class="kw">fn </span>attempt_match_path( |
| <a href=#340 id=340 data-nosnippet>340</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#341 id=341 data-nosnippet>341</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#342 id=342 data-nosnippet>342</a> pattern: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#343 id=343 data-nosnippet>343</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#344 id=344 data-nosnippet>344</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#345 id=345 data-nosnippet>345</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(pattern_resolved) = <span class="self">self</span>.rule.pattern.resolved_paths.get(pattern) { |
| <a href=#346 id=346 data-nosnippet>346</a> <span class="kw">let </span>pattern_path = ast::Path::cast(pattern.clone()).unwrap(); |
| <a href=#347 id=347 data-nosnippet>347</a> <span class="kw">let </span>code_path = ast::Path::cast(code.clone()).unwrap(); |
| <a href=#348 id=348 data-nosnippet>348</a> <span class="kw">if let </span>(<span class="prelude-val">Some</span>(pattern_segment), <span class="prelude-val">Some</span>(code_segment)) = |
| <a href=#349 id=349 data-nosnippet>349</a> (pattern_path.segment(), code_path.segment()) |
| <a href=#350 id=350 data-nosnippet>350</a> { |
| <a href=#351 id=351 data-nosnippet>351</a> <span class="comment">// Match everything within the segment except for the name-ref, which is handled |
| <a href=#352 id=352 data-nosnippet>352</a> // separately via comparing what the path resolves to below. |
| <a href=#353 id=353 data-nosnippet>353</a> </span><span class="self">self</span>.attempt_match_opt( |
| <a href=#354 id=354 data-nosnippet>354</a> phase, |
| <a href=#355 id=355 data-nosnippet>355</a> pattern_segment.generic_arg_list(), |
| <a href=#356 id=356 data-nosnippet>356</a> code_segment.generic_arg_list(), |
| <a href=#357 id=357 data-nosnippet>357</a> )<span class="question-mark">?</span>; |
| <a href=#358 id=358 data-nosnippet>358</a> <span class="self">self</span>.attempt_match_opt( |
| <a href=#359 id=359 data-nosnippet>359</a> phase, |
| <a href=#360 id=360 data-nosnippet>360</a> pattern_segment.parenthesized_arg_list(), |
| <a href=#361 id=361 data-nosnippet>361</a> code_segment.parenthesized_arg_list(), |
| <a href=#362 id=362 data-nosnippet>362</a> )<span class="question-mark">?</span>; |
| <a href=#363 id=363 data-nosnippet>363</a> } |
| <a href=#364 id=364 data-nosnippet>364</a> <span class="kw">if </span><span class="macro">matches!</span>(phase, Phase::Second(<span class="kw">_</span>)) { |
| <a href=#365 id=365 data-nosnippet>365</a> <span class="kw">let </span>resolution = <span class="self">self |
| <a href=#366 id=366 data-nosnippet>366</a> </span>.sema |
| <a href=#367 id=367 data-nosnippet>367</a> .resolve_path(<span class="kw-2">&</span>code_path) |
| <a href=#368 id=368 data-nosnippet>368</a> .ok_or_else(|| <span class="macro">match_error!</span>(<span class="string">"Failed to resolve path `{}`"</span>, code.text()))<span class="question-mark">?</span>; |
| <a href=#369 id=369 data-nosnippet>369</a> <span class="kw">if </span>pattern_resolved.<span class="macro">resolution !</span>= resolution { |
| <a href=#370 id=370 data-nosnippet>370</a> <span class="macro">fail_match!</span>(<span class="string">"Pattern had path `{}` code had `{}`"</span>, pattern.text(), code.text()); |
| <a href=#371 id=371 data-nosnippet>371</a> } |
| <a href=#372 id=372 data-nosnippet>372</a> } |
| <a href=#373 id=373 data-nosnippet>373</a> } <span class="kw">else </span>{ |
| <a href=#374 id=374 data-nosnippet>374</a> <span class="kw">return </span><span class="self">self</span>.attempt_match_node_children(phase, pattern, code); |
| <a href=#375 id=375 data-nosnippet>375</a> } |
| <a href=#376 id=376 data-nosnippet>376</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#377 id=377 data-nosnippet>377</a> } |
| <a href=#378 id=378 data-nosnippet>378</a> |
| <a href=#379 id=379 data-nosnippet>379</a> <span class="kw">fn </span>attempt_match_opt<T: AstNode>( |
| <a href=#380 id=380 data-nosnippet>380</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#381 id=381 data-nosnippet>381</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#382 id=382 data-nosnippet>382</a> pattern: <span class="prelude-ty">Option</span><T>, |
| <a href=#383 id=383 data-nosnippet>383</a> code: <span class="prelude-ty">Option</span><T>, |
| <a href=#384 id=384 data-nosnippet>384</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#385 id=385 data-nosnippet>385</a> <span class="kw">match </span>(pattern, code) { |
| <a href=#386 id=386 data-nosnippet>386</a> (<span class="prelude-val">Some</span>(p), <span class="prelude-val">Some</span>(c)) => <span class="self">self</span>.attempt_match_node(phase, p.syntax(), c.syntax()), |
| <a href=#387 id=387 data-nosnippet>387</a> (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="prelude-val">Ok</span>(()), |
| <a href=#388 id=388 data-nosnippet>388</a> (<span class="prelude-val">Some</span>(p), <span class="prelude-val">None</span>) => <span class="macro">fail_match!</span>(<span class="string">"Pattern `{}` had nothing to match"</span>, p.syntax().text()), |
| <a href=#389 id=389 data-nosnippet>389</a> (<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(c)) => { |
| <a href=#390 id=390 data-nosnippet>390</a> <span class="macro">fail_match!</span>(<span class="string">"Nothing in pattern to match code `{}`"</span>, c.syntax().text()) |
| <a href=#391 id=391 data-nosnippet>391</a> } |
| <a href=#392 id=392 data-nosnippet>392</a> } |
| <a href=#393 id=393 data-nosnippet>393</a> } |
| <a href=#394 id=394 data-nosnippet>394</a> |
| <a href=#395 id=395 data-nosnippet>395</a> <span class="doccomment">/// We want to allow the records to match in any order, so we have special matching logic for |
| <a href=#396 id=396 data-nosnippet>396</a> /// them. |
| <a href=#397 id=397 data-nosnippet>397</a> </span><span class="kw">fn </span>attempt_match_record_field_list( |
| <a href=#398 id=398 data-nosnippet>398</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#399 id=399 data-nosnippet>399</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#400 id=400 data-nosnippet>400</a> pattern: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#401 id=401 data-nosnippet>401</a> code: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#402 id=402 data-nosnippet>402</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#403 id=403 data-nosnippet>403</a> <span class="comment">// Build a map keyed by field name. |
| <a href=#404 id=404 data-nosnippet>404</a> </span><span class="kw">let </span><span class="kw-2">mut </span>fields_by_name: FxHashMap<SmolStr, SyntaxNode> = FxHashMap::default(); |
| <a href=#405 id=405 data-nosnippet>405</a> <span class="kw">for </span>child <span class="kw">in </span>code.children() { |
| <a href=#406 id=406 data-nosnippet>406</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(record) = ast::RecordExprField::cast(child.clone()) |
| <a href=#407 id=407 data-nosnippet>407</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(name) = record.field_name() |
| <a href=#408 id=408 data-nosnippet>408</a> { |
| <a href=#409 id=409 data-nosnippet>409</a> fields_by_name.insert(name.text().into(), child.clone()); |
| <a href=#410 id=410 data-nosnippet>410</a> } |
| <a href=#411 id=411 data-nosnippet>411</a> } |
| <a href=#412 id=412 data-nosnippet>412</a> <span class="kw">for </span>p <span class="kw">in </span>pattern.children_with_tokens() { |
| <a href=#413 id=413 data-nosnippet>413</a> <span class="kw">if let </span>SyntaxElement::Node(p) = p |
| <a href=#414 id=414 data-nosnippet>414</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(name_element) = p.first_child_or_token() |
| <a href=#415 id=415 data-nosnippet>415</a> { |
| <a href=#416 id=416 data-nosnippet>416</a> <span class="kw">if </span><span class="self">self</span>.get_placeholder(<span class="kw-2">&</span>name_element).is_some() { |
| <a href=#417 id=417 data-nosnippet>417</a> <span class="comment">// If the pattern is using placeholders for field names then order |
| <a href=#418 id=418 data-nosnippet>418</a> // independence doesn't make sense. Fall back to regular ordered |
| <a href=#419 id=419 data-nosnippet>419</a> // matching. |
| <a href=#420 id=420 data-nosnippet>420</a> </span><span class="kw">return </span><span class="self">self</span>.attempt_match_node_children(phase, pattern, code); |
| <a href=#421 id=421 data-nosnippet>421</a> } |
| <a href=#422 id=422 data-nosnippet>422</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(ident) = only_ident(name_element) { |
| <a href=#423 id=423 data-nosnippet>423</a> <span class="kw">let </span>code_record = fields_by_name.remove(ident.text()).ok_or_else(|| { |
| <a href=#424 id=424 data-nosnippet>424</a> <span class="macro">match_error!</span>(<span class="string">"Placeholder has record field '{}', but code doesn't"</span>, ident) |
| <a href=#425 id=425 data-nosnippet>425</a> })<span class="question-mark">?</span>; |
| <a href=#426 id=426 data-nosnippet>426</a> <span class="self">self</span>.attempt_match_node(phase, <span class="kw-2">&</span>p, <span class="kw-2">&</span>code_record)<span class="question-mark">?</span>; |
| <a href=#427 id=427 data-nosnippet>427</a> } |
| <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">if let </span><span class="prelude-val">Some</span>(unmatched_fields) = fields_by_name.keys().next() { |
| <a href=#431 id=431 data-nosnippet>431</a> <span class="macro">fail_match!</span>( |
| <a href=#432 id=432 data-nosnippet>432</a> <span class="string">"{} field(s) of a record literal failed to match, starting with {}"</span>, |
| <a href=#433 id=433 data-nosnippet>433</a> fields_by_name.len(), |
| <a href=#434 id=434 data-nosnippet>434</a> unmatched_fields |
| <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="prelude-val">Ok</span>(()) |
| <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="doccomment">/// Outside of token trees, a placeholder can only match a single AST node, whereas in a token |
| <a href=#441 id=441 data-nosnippet>441</a> /// tree it can match a sequence of tokens. Note, that this code will only be used when the |
| <a href=#442 id=442 data-nosnippet>442</a> /// pattern matches the macro invocation. For matches within the macro call, we'll already have |
| <a href=#443 id=443 data-nosnippet>443</a> /// expanded the macro. |
| <a href=#444 id=444 data-nosnippet>444</a> </span><span class="kw">fn </span>attempt_match_token_tree( |
| <a href=#445 id=445 data-nosnippet>445</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#446 id=446 data-nosnippet>446</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#447 id=447 data-nosnippet>447</a> pattern: <span class="kw-2">&</span>SyntaxNode, |
| <a href=#448 id=448 data-nosnippet>448</a> code: <span class="kw-2">&</span>syntax::SyntaxNode, |
| <a href=#449 id=449 data-nosnippet>449</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#450 id=450 data-nosnippet>450</a> <span class="kw">let </span><span class="kw-2">mut </span>pattern = PatternIterator::new(pattern).peekable(); |
| <a href=#451 id=451 data-nosnippet>451</a> <span class="kw">let </span><span class="kw-2">mut </span>children = code.children_with_tokens(); |
| <a href=#452 id=452 data-nosnippet>452</a> <span class="kw">while let </span><span class="prelude-val">Some</span>(child) = children.next() { |
| <a href=#453 id=453 data-nosnippet>453</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(placeholder) = pattern.peek().and_then(|p| <span class="self">self</span>.get_placeholder(p)) { |
| <a href=#454 id=454 data-nosnippet>454</a> pattern.next(); |
| <a href=#455 id=455 data-nosnippet>455</a> <span class="kw">let </span>next_pattern_token = pattern |
| <a href=#456 id=456 data-nosnippet>456</a> .peek() |
| <a href=#457 id=457 data-nosnippet>457</a> .and_then(|p| <span class="kw">match </span>p { |
| <a href=#458 id=458 data-nosnippet>458</a> SyntaxElement::Token(t) => <span class="prelude-val">Some</span>(t.clone()), |
| <a href=#459 id=459 data-nosnippet>459</a> SyntaxElement::Node(n) => n.first_token(), |
| <a href=#460 id=460 data-nosnippet>460</a> }) |
| <a href=#461 id=461 data-nosnippet>461</a> .map(|p| p.text().to_owned()); |
| <a href=#462 id=462 data-nosnippet>462</a> <span class="kw">let </span>first_matched_token = child.clone(); |
| <a href=#463 id=463 data-nosnippet>463</a> <span class="kw">let </span><span class="kw-2">mut </span>last_matched_token = child; |
| <a href=#464 id=464 data-nosnippet>464</a> <span class="comment">// Read code tokens util we reach one equal to the next token from our pattern |
| <a href=#465 id=465 data-nosnippet>465</a> // or we reach the end of the token tree. |
| <a href=#466 id=466 data-nosnippet>466</a> </span><span class="kw">for </span>next <span class="kw">in </span><span class="kw-2">&mut </span>children { |
| <a href=#467 id=467 data-nosnippet>467</a> <span class="kw">match </span><span class="kw-2">&</span>next { |
| <a href=#468 id=468 data-nosnippet>468</a> SyntaxElement::Token(t) => { |
| <a href=#469 id=469 data-nosnippet>469</a> <span class="kw">if </span><span class="prelude-val">Some</span>(t.to_string()) == next_pattern_token { |
| <a href=#470 id=470 data-nosnippet>470</a> pattern.next(); |
| <a href=#471 id=471 data-nosnippet>471</a> <span class="kw">break</span>; |
| <a href=#472 id=472 data-nosnippet>472</a> } |
| <a href=#473 id=473 data-nosnippet>473</a> } |
| <a href=#474 id=474 data-nosnippet>474</a> SyntaxElement::Node(n) => { |
| <a href=#475 id=475 data-nosnippet>475</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(first_token) = n.first_token() |
| <a href=#476 id=476 data-nosnippet>476</a> && <span class="prelude-val">Some</span>(first_token.text()) == next_pattern_token.as_deref() |
| <a href=#477 id=477 data-nosnippet>477</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(SyntaxElement::Node(p)) = pattern.next() |
| <a href=#478 id=478 data-nosnippet>478</a> { |
| <a href=#479 id=479 data-nosnippet>479</a> <span class="comment">// We have a subtree that starts with the next token in our pattern. |
| <a href=#480 id=480 data-nosnippet>480</a> </span><span class="self">self</span>.attempt_match_token_tree(phase, <span class="kw-2">&</span>p, n)<span class="question-mark">?</span>; |
| <a href=#481 id=481 data-nosnippet>481</a> <span class="kw">break</span>; |
| <a href=#482 id=482 data-nosnippet>482</a> } |
| <a href=#483 id=483 data-nosnippet>483</a> } |
| <a href=#484 id=484 data-nosnippet>484</a> }; |
| <a href=#485 id=485 data-nosnippet>485</a> last_matched_token = next; |
| <a href=#486 id=486 data-nosnippet>486</a> } |
| <a href=#487 id=487 data-nosnippet>487</a> <span class="kw">if let </span>Phase::Second(match_out) = phase { |
| <a href=#488 id=488 data-nosnippet>488</a> match_out.placeholder_values.insert( |
| <a href=#489 id=489 data-nosnippet>489</a> placeholder.ident.clone(), |
| <a href=#490 id=490 data-nosnippet>490</a> PlaceholderMatch::from_range(FileRange { |
| <a href=#491 id=491 data-nosnippet>491</a> file_id: <span class="self">self |
| <a href=#492 id=492 data-nosnippet>492</a> </span>.sema |
| <a href=#493 id=493 data-nosnippet>493</a> .original_range_opt(code) |
| <a href=#494 id=494 data-nosnippet>494</a> .ok_or(MatchFailed { |
| <a href=#495 id=495 data-nosnippet>495</a> reason: <span class="prelude-val">Some</span>(<span class="string">"def site definition"</span>.to_owned()), |
| <a href=#496 id=496 data-nosnippet>496</a> })<span class="question-mark">? |
| <a href=#497 id=497 data-nosnippet>497</a> </span>.file_id, |
| <a href=#498 id=498 data-nosnippet>498</a> range: first_matched_token |
| <a href=#499 id=499 data-nosnippet>499</a> .text_range() |
| <a href=#500 id=500 data-nosnippet>500</a> .cover(last_matched_token.text_range()), |
| <a href=#501 id=501 data-nosnippet>501</a> }), |
| <a href=#502 id=502 data-nosnippet>502</a> ); |
| <a href=#503 id=503 data-nosnippet>503</a> } |
| <a href=#504 id=504 data-nosnippet>504</a> <span class="kw">continue</span>; |
| <a href=#505 id=505 data-nosnippet>505</a> } |
| <a href=#506 id=506 data-nosnippet>506</a> <span class="comment">// Match literal (non-placeholder) tokens. |
| <a href=#507 id=507 data-nosnippet>507</a> </span><span class="kw">match </span>child { |
| <a href=#508 id=508 data-nosnippet>508</a> SyntaxElement::Token(token) => { |
| <a href=#509 id=509 data-nosnippet>509</a> <span class="self">self</span>.attempt_match_token(phase, <span class="kw-2">&mut </span>pattern, <span class="kw-2">&</span>token)<span class="question-mark">?</span>; |
| <a href=#510 id=510 data-nosnippet>510</a> } |
| <a href=#511 id=511 data-nosnippet>511</a> SyntaxElement::Node(node) => <span class="kw">match </span>pattern.next() { |
| <a href=#512 id=512 data-nosnippet>512</a> <span class="prelude-val">Some</span>(SyntaxElement::Node(p)) => { |
| <a href=#513 id=513 data-nosnippet>513</a> <span class="self">self</span>.attempt_match_token_tree(phase, <span class="kw-2">&</span>p, <span class="kw-2">&</span>node)<span class="question-mark">?</span>; |
| <a href=#514 id=514 data-nosnippet>514</a> } |
| <a href=#515 id=515 data-nosnippet>515</a> <span class="prelude-val">Some</span>(SyntaxElement::Token(p)) => <span class="macro">fail_match!</span>( |
| <a href=#516 id=516 data-nosnippet>516</a> <span class="string">"Pattern has token '{}', code has subtree '{}'"</span>, |
| <a href=#517 id=517 data-nosnippet>517</a> p.text(), |
| <a href=#518 id=518 data-nosnippet>518</a> node.text() |
| <a href=#519 id=519 data-nosnippet>519</a> ), |
| <a href=#520 id=520 data-nosnippet>520</a> <span class="prelude-val">None </span>=> <span class="macro">fail_match!</span>(<span class="string">"Pattern has nothing, code has '{}'"</span>, node.text()), |
| <a href=#521 id=521 data-nosnippet>521</a> }, |
| <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> <span class="kw">if let </span><span class="prelude-val">Some</span>(p) = pattern.next() { |
| <a href=#525 id=525 data-nosnippet>525</a> <span class="macro">fail_match!</span>(<span class="string">"Reached end of token tree in code, but pattern still has {:?}"</span>, p); |
| <a href=#526 id=526 data-nosnippet>526</a> } |
| <a href=#527 id=527 data-nosnippet>527</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#528 id=528 data-nosnippet>528</a> } |
| <a href=#529 id=529 data-nosnippet>529</a> |
| <a href=#530 id=530 data-nosnippet>530</a> <span class="kw">fn </span>attempt_match_ufcs_to_method_call( |
| <a href=#531 id=531 data-nosnippet>531</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#532 id=532 data-nosnippet>532</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#533 id=533 data-nosnippet>533</a> pattern_ufcs: <span class="kw-2">&</span>UfcsCallInfo<<span class="lifetime">'db</span>>, |
| <a href=#534 id=534 data-nosnippet>534</a> code: <span class="kw-2">&</span>ast::MethodCallExpr, |
| <a href=#535 id=535 data-nosnippet>535</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#536 id=536 data-nosnippet>536</a> <span class="kw">use </span>ast::HasArgList; |
| <a href=#537 id=537 data-nosnippet>537</a> <span class="kw">let </span>code_resolved_function = <span class="self">self |
| <a href=#538 id=538 data-nosnippet>538</a> </span>.sema |
| <a href=#539 id=539 data-nosnippet>539</a> .resolve_method_call(code) |
| <a href=#540 id=540 data-nosnippet>540</a> .ok_or_else(|| <span class="macro">match_error!</span>(<span class="string">"Failed to resolve method call"</span>))<span class="question-mark">?</span>; |
| <a href=#541 id=541 data-nosnippet>541</a> <span class="kw">if </span>pattern_ufcs.<span class="macro">function !</span>= code_resolved_function { |
| <a href=#542 id=542 data-nosnippet>542</a> <span class="macro">fail_match!</span>(<span class="string">"Method call resolved to a different function"</span>); |
| <a href=#543 id=543 data-nosnippet>543</a> } |
| <a href=#544 id=544 data-nosnippet>544</a> <span class="comment">// Check arguments. |
| <a href=#545 id=545 data-nosnippet>545</a> </span><span class="kw">let </span><span class="kw-2">mut </span>pattern_args = pattern_ufcs |
| <a href=#546 id=546 data-nosnippet>546</a> .call_expr |
| <a href=#547 id=547 data-nosnippet>547</a> .arg_list() |
| <a href=#548 id=548 data-nosnippet>548</a> .ok_or_else(|| <span class="macro">match_error!</span>(<span class="string">"Pattern function call has no args"</span>))<span class="question-mark">? |
| <a href=#549 id=549 data-nosnippet>549</a> </span>.args(); |
| <a href=#550 id=550 data-nosnippet>550</a> <span class="comment">// If the function we're calling takes a self parameter, then we store additional |
| <a href=#551 id=551 data-nosnippet>551</a> // information on the placeholder match about autoderef and autoref. This allows us to use |
| <a href=#552 id=552 data-nosnippet>552</a> // the placeholder in a context where autoderef and autoref don't apply. |
| <a href=#553 id=553 data-nosnippet>553</a> </span><span class="kw">if </span>code_resolved_function.self_param(<span class="self">self</span>.sema.db).is_some() { |
| <a href=#554 id=554 data-nosnippet>554</a> <span class="kw">if let </span>(<span class="prelude-val">Some</span>(pattern_type), <span class="prelude-val">Some</span>(expr)) = |
| <a href=#555 id=555 data-nosnippet>555</a> (<span class="kw-2">&</span>pattern_ufcs.qualifier_type, <span class="kw-2">&</span>code.receiver()) |
| <a href=#556 id=556 data-nosnippet>556</a> { |
| <a href=#557 id=557 data-nosnippet>557</a> <span class="kw">let </span>deref_count = <span class="self">self</span>.check_expr_type(pattern_type, expr)<span class="question-mark">?</span>; |
| <a href=#558 id=558 data-nosnippet>558</a> <span class="kw">let </span>pattern_receiver = pattern_args.next(); |
| <a href=#559 id=559 data-nosnippet>559</a> <span class="self">self</span>.attempt_match_opt(phase, pattern_receiver.clone(), code.receiver())<span class="question-mark">?</span>; |
| <a href=#560 id=560 data-nosnippet>560</a> <span class="kw">if let </span>Phase::Second(match_out) = phase |
| <a href=#561 id=561 data-nosnippet>561</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(placeholder_value) = pattern_receiver |
| <a href=#562 id=562 data-nosnippet>562</a> .and_then(|n| <span class="self">self</span>.get_placeholder_for_node(n.syntax())) |
| <a href=#563 id=563 data-nosnippet>563</a> .and_then(|placeholder| { |
| <a href=#564 id=564 data-nosnippet>564</a> match_out.placeholder_values.get_mut(<span class="kw-2">&</span>placeholder.ident) |
| <a href=#565 id=565 data-nosnippet>565</a> }) |
| <a href=#566 id=566 data-nosnippet>566</a> { |
| <a href=#567 id=567 data-nosnippet>567</a> placeholder_value.autoderef_count = deref_count; |
| <a href=#568 id=568 data-nosnippet>568</a> placeholder_value.autoref_kind = <span class="self">self |
| <a href=#569 id=569 data-nosnippet>569</a> </span>.sema |
| <a href=#570 id=570 data-nosnippet>570</a> .resolve_method_call_as_callable(code) |
| <a href=#571 id=571 data-nosnippet>571</a> .and_then(|callable| { |
| <a href=#572 id=572 data-nosnippet>572</a> <span class="kw">let </span>(self_param, <span class="kw">_</span>) = callable.receiver_param(<span class="self">self</span>.sema.db)<span class="question-mark">?</span>; |
| <a href=#573 id=573 data-nosnippet>573</a> <span class="prelude-val">Some</span>(<span class="self">self</span>.sema.source(self_param)<span class="question-mark">?</span>.value.kind()) |
| <a href=#574 id=574 data-nosnippet>574</a> }) |
| <a href=#575 id=575 data-nosnippet>575</a> .unwrap_or(ast::SelfParamKind::Owned); |
| <a href=#576 id=576 data-nosnippet>576</a> } |
| <a href=#577 id=577 data-nosnippet>577</a> } |
| <a href=#578 id=578 data-nosnippet>578</a> } <span class="kw">else </span>{ |
| <a href=#579 id=579 data-nosnippet>579</a> <span class="self">self</span>.attempt_match_opt(phase, pattern_args.next(), code.receiver())<span class="question-mark">?</span>; |
| <a href=#580 id=580 data-nosnippet>580</a> } |
| <a href=#581 id=581 data-nosnippet>581</a> <span class="kw">let </span><span class="kw-2">mut </span>code_args = |
| <a href=#582 id=582 data-nosnippet>582</a> code.arg_list().ok_or_else(|| <span class="macro">match_error!</span>(<span class="string">"Code method call has no args"</span>))<span class="question-mark">?</span>.args(); |
| <a href=#583 id=583 data-nosnippet>583</a> <span class="kw">loop </span>{ |
| <a href=#584 id=584 data-nosnippet>584</a> <span class="kw">match </span>(pattern_args.next(), code_args.next()) { |
| <a href=#585 id=585 data-nosnippet>585</a> (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="kw">return </span><span class="prelude-val">Ok</span>(()), |
| <a href=#586 id=586 data-nosnippet>586</a> (p, c) => <span class="self">self</span>.attempt_match_opt(phase, p, c)<span class="question-mark">?</span>, |
| <a href=#587 id=587 data-nosnippet>587</a> } |
| <a href=#588 id=588 data-nosnippet>588</a> } |
| <a href=#589 id=589 data-nosnippet>589</a> } |
| <a href=#590 id=590 data-nosnippet>590</a> |
| <a href=#591 id=591 data-nosnippet>591</a> <span class="kw">fn </span>attempt_match_ufcs_to_ufcs( |
| <a href=#592 id=592 data-nosnippet>592</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#593 id=593 data-nosnippet>593</a> phase: <span class="kw-2">&mut </span>Phase<<span class="lifetime">'_</span>>, |
| <a href=#594 id=594 data-nosnippet>594</a> pattern_ufcs: <span class="kw-2">&</span>UfcsCallInfo<<span class="lifetime">'db</span>>, |
| <a href=#595 id=595 data-nosnippet>595</a> code: <span class="kw-2">&</span>ast::CallExpr, |
| <a href=#596 id=596 data-nosnippet>596</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#597 id=597 data-nosnippet>597</a> <span class="kw">use </span>ast::HasArgList; |
| <a href=#598 id=598 data-nosnippet>598</a> <span class="comment">// Check that the first argument is the expected type. |
| <a href=#599 id=599 data-nosnippet>599</a> </span><span class="kw">if let </span>(<span class="prelude-val">Some</span>(pattern_type), <span class="prelude-val">Some</span>(expr)) = ( |
| <a href=#600 id=600 data-nosnippet>600</a> <span class="kw-2">&</span>pattern_ufcs.qualifier_type, |
| <a href=#601 id=601 data-nosnippet>601</a> <span class="kw-2">&</span>code.arg_list().and_then(|code_args| code_args.args().next()), |
| <a href=#602 id=602 data-nosnippet>602</a> ) { |
| <a href=#603 id=603 data-nosnippet>603</a> <span class="self">self</span>.check_expr_type(pattern_type, expr)<span class="question-mark">?</span>; |
| <a href=#604 id=604 data-nosnippet>604</a> } |
| <a href=#605 id=605 data-nosnippet>605</a> <span class="self">self</span>.attempt_match_node_children(phase, pattern_ufcs.call_expr.syntax(), code.syntax()) |
| <a href=#606 id=606 data-nosnippet>606</a> } |
| <a href=#607 id=607 data-nosnippet>607</a> |
| <a href=#608 id=608 data-nosnippet>608</a> <span class="doccomment">/// Verifies that `expr` matches `pattern_type`, possibly after dereferencing some number of |
| <a href=#609 id=609 data-nosnippet>609</a> /// times. Returns the number of times it needed to be dereferenced. |
| <a href=#610 id=610 data-nosnippet>610</a> </span><span class="kw">fn </span>check_expr_type( |
| <a href=#611 id=611 data-nosnippet>611</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#612 id=612 data-nosnippet>612</a> pattern_type: <span class="kw-2">&</span>hir::Type<<span class="lifetime">'db</span>>, |
| <a href=#613 id=613 data-nosnippet>613</a> expr: <span class="kw-2">&</span>ast::Expr, |
| <a href=#614 id=614 data-nosnippet>614</a> ) -> <span class="prelude-ty">Result</span><usize, MatchFailed> { |
| <a href=#615 id=615 data-nosnippet>615</a> <span class="kw">use </span>hir::HirDisplay; |
| <a href=#616 id=616 data-nosnippet>616</a> <span class="kw">let </span>code_type = <span class="self">self |
| <a href=#617 id=617 data-nosnippet>617</a> </span>.sema |
| <a href=#618 id=618 data-nosnippet>618</a> .type_of_expr(expr) |
| <a href=#619 id=619 data-nosnippet>619</a> .ok_or_else(|| { |
| <a href=#620 id=620 data-nosnippet>620</a> <span class="macro">match_error!</span>(<span class="string">"Failed to get receiver type for `{}`"</span>, expr.syntax().text()) |
| <a href=#621 id=621 data-nosnippet>621</a> })<span class="question-mark">? |
| <a href=#622 id=622 data-nosnippet>622</a> </span>.original; |
| <a href=#623 id=623 data-nosnippet>623</a> <span class="kw">let </span>krate = <span class="self">self</span>.sema.scope(expr.syntax()).map(|it| it.krate()).unwrap_or_else(|| { |
| <a href=#624 id=624 data-nosnippet>624</a> hir::Crate::from(<span class="kw-2">*</span><span class="self">self</span>.sema.db.all_crates().last().expect(<span class="string">"no crate graph present"</span>)) |
| <a href=#625 id=625 data-nosnippet>625</a> }); |
| <a href=#626 id=626 data-nosnippet>626</a> |
| <a href=#627 id=627 data-nosnippet>627</a> code_type |
| <a href=#628 id=628 data-nosnippet>628</a> .autoderef(<span class="self">self</span>.sema.db) |
| <a href=#629 id=629 data-nosnippet>629</a> .enumerate() |
| <a href=#630 id=630 data-nosnippet>630</a> .find(|(<span class="kw">_</span>, deref_code_type)| pattern_type == deref_code_type) |
| <a href=#631 id=631 data-nosnippet>631</a> .map(|(count, <span class="kw">_</span>)| count) |
| <a href=#632 id=632 data-nosnippet>632</a> .ok_or_else(|| { |
| <a href=#633 id=633 data-nosnippet>633</a> <span class="kw">let </span>display_target = krate.to_display_target(<span class="self">self</span>.sema.db); |
| <a href=#634 id=634 data-nosnippet>634</a> <span class="comment">// Temporary needed to make the borrow checker happy. |
| <a href=#635 id=635 data-nosnippet>635</a> </span><span class="macro">match_error!</span>( |
| <a href=#636 id=636 data-nosnippet>636</a> <span class="string">"Pattern type `{}` didn't match code type `{}`"</span>, |
| <a href=#637 id=637 data-nosnippet>637</a> pattern_type.display(<span class="self">self</span>.sema.db, display_target), |
| <a href=#638 id=638 data-nosnippet>638</a> code_type.display(<span class="self">self</span>.sema.db, display_target) |
| <a href=#639 id=639 data-nosnippet>639</a> ) |
| <a href=#640 id=640 data-nosnippet>640</a> }) |
| <a href=#641 id=641 data-nosnippet>641</a> } |
| <a href=#642 id=642 data-nosnippet>642</a> |
| <a href=#643 id=643 data-nosnippet>643</a> <span class="kw">fn </span>get_placeholder_for_node(<span class="kw-2">&</span><span class="self">self</span>, node: <span class="kw-2">&</span>SyntaxNode) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>Placeholder> { |
| <a href=#644 id=644 data-nosnippet>644</a> <span class="self">self</span>.get_placeholder(<span class="kw-2">&</span>SyntaxElement::Node(node.clone())) |
| <a href=#645 id=645 data-nosnippet>645</a> } |
| <a href=#646 id=646 data-nosnippet>646</a> |
| <a href=#647 id=647 data-nosnippet>647</a> <span class="kw">fn </span>get_placeholder(<span class="kw-2">&</span><span class="self">self</span>, element: <span class="kw-2">&</span>SyntaxElement) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>Placeholder> { |
| <a href=#648 id=648 data-nosnippet>648</a> only_ident(element.clone()).and_then(|ident| <span class="self">self</span>.rule.get_placeholder(<span class="kw-2">&</span>ident)) |
| <a href=#649 id=649 data-nosnippet>649</a> } |
| <a href=#650 id=650 data-nosnippet>650</a>} |
| <a href=#651 id=651 data-nosnippet>651</a> |
| <a href=#652 id=652 data-nosnippet>652</a><span class="kw">impl </span>Match { |
| <a href=#653 id=653 data-nosnippet>653</a> <span class="kw">fn </span>render_template_paths<<span class="lifetime">'db</span>>( |
| <a href=#654 id=654 data-nosnippet>654</a> <span class="kw-2">&mut </span><span class="self">self</span>, |
| <a href=#655 id=655 data-nosnippet>655</a> template: <span class="kw-2">&</span>ResolvedPattern<<span class="lifetime">'db</span>>, |
| <a href=#656 id=656 data-nosnippet>656</a> sema: <span class="kw-2">&</span>Semantics<<span class="lifetime">'db</span>, ide_db::RootDatabase>, |
| <a href=#657 id=657 data-nosnippet>657</a> ) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#658 id=658 data-nosnippet>658</a> <span class="kw">let </span>module = sema |
| <a href=#659 id=659 data-nosnippet>659</a> .scope(<span class="kw-2">&</span><span class="self">self</span>.matched_node) |
| <a href=#660 id=660 data-nosnippet>660</a> .ok_or_else(|| <span class="macro">match_error!</span>(<span class="string">"Matched node isn't in a module"</span>))<span class="question-mark">? |
| <a href=#661 id=661 data-nosnippet>661</a> </span>.module(); |
| <a href=#662 id=662 data-nosnippet>662</a> <span class="kw">for </span>(path, resolved_path) <span class="kw">in </span><span class="kw-2">&</span>template.resolved_paths { |
| <a href=#663 id=663 data-nosnippet>663</a> <span class="kw">if let </span>hir::PathResolution::Def(module_def) = resolved_path.resolution { |
| <a href=#664 id=664 data-nosnippet>664</a> <span class="kw">let </span>cfg = FindPathConfig { |
| <a href=#665 id=665 data-nosnippet>665</a> prefer_no_std: <span class="bool-val">false</span>, |
| <a href=#666 id=666 data-nosnippet>666</a> prefer_prelude: <span class="bool-val">true</span>, |
| <a href=#667 id=667 data-nosnippet>667</a> prefer_absolute: <span class="bool-val">false</span>, |
| <a href=#668 id=668 data-nosnippet>668</a> allow_unstable: <span class="bool-val">true</span>, |
| <a href=#669 id=669 data-nosnippet>669</a> }; |
| <a href=#670 id=670 data-nosnippet>670</a> <span class="kw">let </span>mod_path = module.find_path(sema.db, module_def, cfg).ok_or_else(|| { |
| <a href=#671 id=671 data-nosnippet>671</a> <span class="macro">match_error!</span>(<span class="string">"Failed to render template path `{}` at match location"</span>) |
| <a href=#672 id=672 data-nosnippet>672</a> })<span class="question-mark">?</span>; |
| <a href=#673 id=673 data-nosnippet>673</a> <span class="self">self</span>.rendered_template_paths.insert(path.clone(), mod_path); |
| <a href=#674 id=674 data-nosnippet>674</a> } |
| <a href=#675 id=675 data-nosnippet>675</a> } |
| <a href=#676 id=676 data-nosnippet>676</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#677 id=677 data-nosnippet>677</a> } |
| <a href=#678 id=678 data-nosnippet>678</a>} |
| <a href=#679 id=679 data-nosnippet>679</a> |
| <a href=#680 id=680 data-nosnippet>680</a><span class="kw">impl </span>Phase<<span class="lifetime">'_</span>> { |
| <a href=#681 id=681 data-nosnippet>681</a> <span class="kw">fn </span>next_non_trivial(<span class="kw-2">&mut </span><span class="self">self</span>, code_it: <span class="kw-2">&mut </span>SyntaxElementChildren) -> <span class="prelude-ty">Option</span><SyntaxElement> { |
| <a href=#682 id=682 data-nosnippet>682</a> <span class="kw">loop </span>{ |
| <a href=#683 id=683 data-nosnippet>683</a> <span class="kw">let </span>c = code_it.next(); |
| <a href=#684 id=684 data-nosnippet>684</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(SyntaxElement::Token(t)) = <span class="kw-2">&</span>c { |
| <a href=#685 id=685 data-nosnippet>685</a> <span class="self">self</span>.record_ignored_comments(t); |
| <a href=#686 id=686 data-nosnippet>686</a> <span class="kw">if </span>t.kind().is_trivia() { |
| <a href=#687 id=687 data-nosnippet>687</a> <span class="kw">continue</span>; |
| <a href=#688 id=688 data-nosnippet>688</a> } |
| <a href=#689 id=689 data-nosnippet>689</a> } |
| <a href=#690 id=690 data-nosnippet>690</a> <span class="kw">return </span>c; |
| <a href=#691 id=691 data-nosnippet>691</a> } |
| <a href=#692 id=692 data-nosnippet>692</a> } |
| <a href=#693 id=693 data-nosnippet>693</a> |
| <a href=#694 id=694 data-nosnippet>694</a> <span class="kw">fn </span>record_ignored_comments(<span class="kw-2">&mut </span><span class="self">self</span>, token: <span class="kw-2">&</span>SyntaxToken) { |
| <a href=#695 id=695 data-nosnippet>695</a> <span class="kw">if </span>token.kind() == SyntaxKind::COMMENT |
| <a href=#696 id=696 data-nosnippet>696</a> && <span class="kw">let </span>Phase::Second(match_out) = <span class="self">self |
| <a href=#697 id=697 data-nosnippet>697</a> </span>&& <span class="kw">let </span><span class="prelude-val">Some</span>(comment) = ast::Comment::cast(token.clone()) |
| <a href=#698 id=698 data-nosnippet>698</a> { |
| <a href=#699 id=699 data-nosnippet>699</a> match_out.ignored_comments.push(comment); |
| <a href=#700 id=700 data-nosnippet>700</a> } |
| <a href=#701 id=701 data-nosnippet>701</a> } |
| <a href=#702 id=702 data-nosnippet>702</a>} |
| <a href=#703 id=703 data-nosnippet>703</a> |
| <a href=#704 id=704 data-nosnippet>704</a><span class="kw">fn </span>is_closing_token(kind: SyntaxKind) -> bool { |
| <a href=#705 id=705 data-nosnippet>705</a> kind == SyntaxKind::R_PAREN || kind == SyntaxKind::R_CURLY || kind == SyntaxKind::R_BRACK |
| <a href=#706 id=706 data-nosnippet>706</a>} |
| <a href=#707 id=707 data-nosnippet>707</a> |
| <a href=#708 id=708 data-nosnippet>708</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>record_match_fails_reasons_scope<F, T>(debug_active: bool, f: F) -> T |
| <a href=#709 id=709 data-nosnippet>709</a><span class="kw">where |
| <a href=#710 id=710 data-nosnippet>710</a> </span>F: Fn() -> T, |
| <a href=#711 id=711 data-nosnippet>711</a>{ |
| <a href=#712 id=712 data-nosnippet>712</a> RECORDING_MATCH_FAIL_REASONS.with(|c| c.set(debug_active)); |
| <a href=#713 id=713 data-nosnippet>713</a> <span class="kw">let </span>res = f(); |
| <a href=#714 id=714 data-nosnippet>714</a> RECORDING_MATCH_FAIL_REASONS.with(|c| c.set(<span class="bool-val">false</span>)); |
| <a href=#715 id=715 data-nosnippet>715</a> res |
| <a href=#716 id=716 data-nosnippet>716</a>} |
| <a href=#717 id=717 data-nosnippet>717</a> |
| <a href=#718 id=718 data-nosnippet>718</a><span class="comment">// For performance reasons, we don't want to record the reason why every match fails, only the bit |
| <a href=#719 id=719 data-nosnippet>719</a>// of code that the user indicated they thought would match. We use a thread local to indicate when |
| <a href=#720 id=720 data-nosnippet>720</a>// we are trying to match that bit of code. This saves us having to pass a boolean into all the bits |
| <a href=#721 id=721 data-nosnippet>721</a>// of code that can make the decision to not match. |
| <a href=#722 id=722 data-nosnippet>722</a></span><span class="macro">thread_local!</span> { |
| <a href=#723 id=723 data-nosnippet>723</a> <span class="kw">pub static </span>RECORDING_MATCH_FAIL_REASONS: Cell<bool> = <span class="kw">const </span>{ Cell::new(<span class="bool-val">false</span>) }; |
| <a href=#724 id=724 data-nosnippet>724</a>} |
| <a href=#725 id=725 data-nosnippet>725</a> |
| <a href=#726 id=726 data-nosnippet>726</a><span class="kw">fn </span>recording_match_fail_reasons() -> bool { |
| <a href=#727 id=727 data-nosnippet>727</a> RECORDING_MATCH_FAIL_REASONS.with(|c| c.get()) |
| <a href=#728 id=728 data-nosnippet>728</a>} |
| <a href=#729 id=729 data-nosnippet>729</a> |
| <a href=#730 id=730 data-nosnippet>730</a><span class="kw">impl </span>PlaceholderMatch { |
| <a href=#731 id=731 data-nosnippet>731</a> <span class="kw">fn </span>from_range(range: FileRange) -> <span class="self">Self </span>{ |
| <a href=#732 id=732 data-nosnippet>732</a> <span class="self">Self </span>{ |
| <a href=#733 id=733 data-nosnippet>733</a> range, |
| <a href=#734 id=734 data-nosnippet>734</a> inner_matches: SsrMatches::default(), |
| <a href=#735 id=735 data-nosnippet>735</a> autoderef_count: <span class="number">0</span>, |
| <a href=#736 id=736 data-nosnippet>736</a> autoref_kind: ast::SelfParamKind::Owned, |
| <a href=#737 id=737 data-nosnippet>737</a> } |
| <a href=#738 id=738 data-nosnippet>738</a> } |
| <a href=#739 id=739 data-nosnippet>739</a>} |
| <a href=#740 id=740 data-nosnippet>740</a> |
| <a href=#741 id=741 data-nosnippet>741</a><span class="kw">impl </span>NodeKind { |
| <a href=#742 id=742 data-nosnippet>742</a> <span class="kw">fn </span>matches(<span class="kw-2">&</span><span class="self">self</span>, node: <span class="kw-2">&</span>SyntaxNode) -> <span class="prelude-ty">Result</span><(), MatchFailed> { |
| <a href=#743 id=743 data-nosnippet>743</a> <span class="kw">let </span>ok = <span class="kw">match </span><span class="self">self </span>{ |
| <a href=#744 id=744 data-nosnippet>744</a> <span class="self">Self</span>::Literal => { |
| <a href=#745 id=745 data-nosnippet>745</a> <span class="macro">cov_mark::hit!</span>(literal_constraint); |
| <a href=#746 id=746 data-nosnippet>746</a> ast::Literal::can_cast(node.kind()) |
| <a href=#747 id=747 data-nosnippet>747</a> } |
| <a href=#748 id=748 data-nosnippet>748</a> }; |
| <a href=#749 id=749 data-nosnippet>749</a> <span class="kw">if </span>!ok { |
| <a href=#750 id=750 data-nosnippet>750</a> <span class="macro">fail_match!</span>(<span class="string">"Code '{}' isn't of kind {:?}"</span>, node.text(), <span class="self">self</span>); |
| <a href=#751 id=751 data-nosnippet>751</a> } |
| <a href=#752 id=752 data-nosnippet>752</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#753 id=753 data-nosnippet>753</a> } |
| <a href=#754 id=754 data-nosnippet>754</a>} |
| <a href=#755 id=755 data-nosnippet>755</a> |
| <a href=#756 id=756 data-nosnippet>756</a><span class="comment">// If `node` contains nothing but an ident then return it, otherwise return None. |
| <a href=#757 id=757 data-nosnippet>757</a></span><span class="kw">fn </span>only_ident(element: SyntaxElement) -> <span class="prelude-ty">Option</span><SyntaxToken> { |
| <a href=#758 id=758 data-nosnippet>758</a> <span class="kw">match </span>element { |
| <a href=#759 id=759 data-nosnippet>759</a> SyntaxElement::Token(t) => { |
| <a href=#760 id=760 data-nosnippet>760</a> <span class="kw">if </span>t.kind() == SyntaxKind::IDENT { |
| <a href=#761 id=761 data-nosnippet>761</a> <span class="kw">return </span><span class="prelude-val">Some</span>(t); |
| <a href=#762 id=762 data-nosnippet>762</a> } |
| <a href=#763 id=763 data-nosnippet>763</a> } |
| <a href=#764 id=764 data-nosnippet>764</a> SyntaxElement::Node(n) => { |
| <a href=#765 id=765 data-nosnippet>765</a> <span class="kw">let </span><span class="kw-2">mut </span>children = n.children_with_tokens(); |
| <a href=#766 id=766 data-nosnippet>766</a> <span class="kw">if let </span>(<span class="prelude-val">Some</span>(only_child), <span class="prelude-val">None</span>) = (children.next(), children.next()) { |
| <a href=#767 id=767 data-nosnippet>767</a> <span class="kw">return </span>only_ident(only_child); |
| <a href=#768 id=768 data-nosnippet>768</a> } |
| <a href=#769 id=769 data-nosnippet>769</a> } |
| <a href=#770 id=770 data-nosnippet>770</a> } |
| <a href=#771 id=771 data-nosnippet>771</a> <span class="prelude-val">None |
| <a href=#772 id=772 data-nosnippet>772</a></span>} |
| <a href=#773 id=773 data-nosnippet>773</a> |
| <a href=#774 id=774 data-nosnippet>774</a><span class="kw">struct </span>PatternIterator { |
| <a href=#775 id=775 data-nosnippet>775</a> iter: SyntaxElementChildren, |
| <a href=#776 id=776 data-nosnippet>776</a>} |
| <a href=#777 id=777 data-nosnippet>777</a> |
| <a href=#778 id=778 data-nosnippet>778</a><span class="kw">impl </span>Iterator <span class="kw">for </span>PatternIterator { |
| <a href=#779 id=779 data-nosnippet>779</a> <span class="kw">type </span>Item = SyntaxElement; |
| <a href=#780 id=780 data-nosnippet>780</a> |
| <a href=#781 id=781 data-nosnippet>781</a> <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><SyntaxElement> { |
| <a href=#782 id=782 data-nosnippet>782</a> <span class="self">self</span>.iter.find(|element| !element.kind().is_trivia()) |
| <a href=#783 id=783 data-nosnippet>783</a> } |
| <a href=#784 id=784 data-nosnippet>784</a>} |
| <a href=#785 id=785 data-nosnippet>785</a> |
| <a href=#786 id=786 data-nosnippet>786</a><span class="kw">impl </span>PatternIterator { |
| <a href=#787 id=787 data-nosnippet>787</a> <span class="kw">fn </span>new(parent: <span class="kw-2">&</span>SyntaxNode) -> <span class="self">Self </span>{ |
| <a href=#788 id=788 data-nosnippet>788</a> <span class="self">Self </span>{ iter: parent.children_with_tokens() } |
| <a href=#789 id=789 data-nosnippet>789</a> } |
| <a href=#790 id=790 data-nosnippet>790</a>} |
| <a href=#791 id=791 data-nosnippet>791</a> |
| <a href=#792 id=792 data-nosnippet>792</a><span class="attr">#[cfg(test)] |
| <a href=#793 id=793 data-nosnippet>793</a></span><span class="kw">mod </span>tests { |
| <a href=#794 id=794 data-nosnippet>794</a> <span class="kw">use </span>crate::{MatchFinder, SsrRule}; |
| <a href=#795 id=795 data-nosnippet>795</a> |
| <a href=#796 id=796 data-nosnippet>796</a> <span class="attr">#[test] |
| <a href=#797 id=797 data-nosnippet>797</a> </span><span class="kw">fn </span>parse_match_replace() { |
| <a href=#798 id=798 data-nosnippet>798</a> <span class="kw">let </span>rule: SsrRule = <span class="string">"foo($x) ==>> bar($x)"</span>.parse().unwrap(); |
| <a href=#799 id=799 data-nosnippet>799</a> <span class="kw">let </span>input = <span class="string">"fn foo() {} fn bar() {} fn main() { foo(1+2); }"</span>; |
| <a href=#800 id=800 data-nosnippet>800</a> |
| <a href=#801 id=801 data-nosnippet>801</a> <span class="kw">let </span>(db, position, selections) = <span class="kw">crate</span>::tests::single_file(input); |
| <a href=#802 id=802 data-nosnippet>802</a> hir::attach_db(<span class="kw-2">&</span>db, || { |
| <a href=#803 id=803 data-nosnippet>803</a> <span class="kw">let </span>position = ide_db::FilePosition { |
| <a href=#804 id=804 data-nosnippet>804</a> file_id: position.file_id.file_id(<span class="kw-2">&</span>db), |
| <a href=#805 id=805 data-nosnippet>805</a> offset: position.offset, |
| <a href=#806 id=806 data-nosnippet>806</a> }; |
| <a href=#807 id=807 data-nosnippet>807</a> <span class="kw">let </span><span class="kw-2">mut </span>match_finder = MatchFinder::in_context( |
| <a href=#808 id=808 data-nosnippet>808</a> <span class="kw-2">&</span>db, |
| <a href=#809 id=809 data-nosnippet>809</a> position, |
| <a href=#810 id=810 data-nosnippet>810</a> selections |
| <a href=#811 id=811 data-nosnippet>811</a> .into_iter() |
| <a href=#812 id=812 data-nosnippet>812</a> .map(|frange| ide_db::FileRange { |
| <a href=#813 id=813 data-nosnippet>813</a> file_id: frange.file_id.file_id(<span class="kw-2">&</span>db), |
| <a href=#814 id=814 data-nosnippet>814</a> range: frange.range, |
| <a href=#815 id=815 data-nosnippet>815</a> }) |
| <a href=#816 id=816 data-nosnippet>816</a> .collect(), |
| <a href=#817 id=817 data-nosnippet>817</a> ) |
| <a href=#818 id=818 data-nosnippet>818</a> .unwrap(); |
| <a href=#819 id=819 data-nosnippet>819</a> match_finder.add_rule(rule).unwrap(); |
| <a href=#820 id=820 data-nosnippet>820</a> <span class="kw">let </span>matches = match_finder.matches(); |
| <a href=#821 id=821 data-nosnippet>821</a> <span class="macro">assert_eq!</span>(matches.matches.len(), <span class="number">1</span>); |
| <a href=#822 id=822 data-nosnippet>822</a> <span class="macro">assert_eq!</span>(matches.matches[<span class="number">0</span>].matched_node.text(), <span class="string">"foo(1+2)"</span>); |
| <a href=#823 id=823 data-nosnippet>823</a> <span class="macro">assert_eq!</span>(matches.matches[<span class="number">0</span>].placeholder_values.len(), <span class="number">1</span>); |
| <a href=#824 id=824 data-nosnippet>824</a> |
| <a href=#825 id=825 data-nosnippet>825</a> <span class="kw">let </span>edits = match_finder.edits(); |
| <a href=#826 id=826 data-nosnippet>826</a> <span class="macro">assert_eq!</span>(edits.len(), <span class="number">1</span>); |
| <a href=#827 id=827 data-nosnippet>827</a> <span class="kw">let </span>edit = <span class="kw-2">&</span>edits[<span class="kw-2">&</span>position.file_id]; |
| <a href=#828 id=828 data-nosnippet>828</a> <span class="kw">let </span><span class="kw-2">mut </span>after = input.to_owned(); |
| <a href=#829 id=829 data-nosnippet>829</a> edit.apply(<span class="kw-2">&mut </span>after); |
| <a href=#830 id=830 data-nosnippet>830</a> <span class="macro">assert_eq!</span>(after, <span class="string">"fn foo() {} fn bar() {} fn main() { bar(1+2); }"</span>); |
| <a href=#831 id=831 data-nosnippet>831</a> }); |
| <a href=#832 id=832 data-nosnippet>832</a> } |
| <a href=#833 id=833 data-nosnippet>833</a>} |
| </code></pre></div></section></main></body></html> |
