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<!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/src/inlay_hints.rs`."><title>inlay_hints.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" 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/</div>inlay_hints.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-4"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span>std::{
<a href=#2 id=2 data-nosnippet>2</a> fmt::{<span class="self">self</span>, Write},
<a href=#3 id=3 data-nosnippet>3</a> mem::{<span class="self">self</span>, take},
<a href=#4 id=4 data-nosnippet>4</a>};
<a href=#5 id=5 data-nosnippet>5</a>
<a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>either::Either;
<a href=#7 id=7 data-nosnippet>7</a><span class="kw">use </span>hir::{
<a href=#8 id=8 data-nosnippet>8</a> ClosureStyle, DisplayTarget, EditionedFileId, GenericParam, GenericParamId, HasVisibility,
<a href=#9 id=9 data-nosnippet>9</a> HirDisplay, HirDisplayError, HirWrite, InRealFile, ModuleDef, ModuleDefId, Semantics, sym,
<a href=#10 id=10 data-nosnippet>10</a>};
<a href=#11 id=11 data-nosnippet>11</a><span class="kw">use </span>ide_db::{
<a href=#12 id=12 data-nosnippet>12</a> FileRange, MiniCore, RootDatabase, famous_defs::FamousDefs, text_edit::TextEditBuilder,
<a href=#13 id=13 data-nosnippet>13</a>};
<a href=#14 id=14 data-nosnippet>14</a><span class="kw">use </span>ide_db::{FxHashSet, text_edit::TextEdit};
<a href=#15 id=15 data-nosnippet>15</a><span class="kw">use </span>itertools::Itertools;
<a href=#16 id=16 data-nosnippet>16</a><span class="kw">use </span>macros::UpmapFromRaFixture;
<a href=#17 id=17 data-nosnippet>17</a><span class="kw">use </span>smallvec::{SmallVec, smallvec};
<a href=#18 id=18 data-nosnippet>18</a><span class="kw">use </span>stdx::never;
<a href=#19 id=19 data-nosnippet>19</a><span class="kw">use </span>syntax::{
<a href=#20 id=20 data-nosnippet>20</a> SmolStr, SyntaxNode, TextRange, TextSize, WalkEvent,
<a href=#21 id=21 data-nosnippet>21</a> ast::{<span class="self">self</span>, AstNode, HasGenericParams},
<a href=#22 id=22 data-nosnippet>22</a> format_smolstr, match_ast,
<a href=#23 id=23 data-nosnippet>23</a>};
<a href=#24 id=24 data-nosnippet>24</a>
<a href=#25 id=25 data-nosnippet>25</a><span class="kw">use </span>crate::{FileId, navigation_target::TryToNav};
<a href=#26 id=26 data-nosnippet>26</a>
<a href=#27 id=27 data-nosnippet>27</a><span class="kw">mod </span>adjustment;
<a href=#28 id=28 data-nosnippet>28</a><span class="kw">mod </span>bind_pat;
<a href=#29 id=29 data-nosnippet>29</a><span class="kw">mod </span>binding_mode;
<a href=#30 id=30 data-nosnippet>30</a><span class="kw">mod </span>bounds;
<a href=#31 id=31 data-nosnippet>31</a><span class="kw">mod </span>chaining;
<a href=#32 id=32 data-nosnippet>32</a><span class="kw">mod </span>closing_brace;
<a href=#33 id=33 data-nosnippet>33</a><span class="kw">mod </span>closure_captures;
<a href=#34 id=34 data-nosnippet>34</a><span class="kw">mod </span>closure_ret;
<a href=#35 id=35 data-nosnippet>35</a><span class="kw">mod </span>discriminant;
<a href=#36 id=36 data-nosnippet>36</a><span class="kw">mod </span>extern_block;
<a href=#37 id=37 data-nosnippet>37</a><span class="kw">mod </span>generic_param;
<a href=#38 id=38 data-nosnippet>38</a><span class="kw">mod </span>implicit_drop;
<a href=#39 id=39 data-nosnippet>39</a><span class="kw">mod </span>implicit_static;
<a href=#40 id=40 data-nosnippet>40</a><span class="kw">mod </span>implied_dyn_trait;
<a href=#41 id=41 data-nosnippet>41</a><span class="kw">mod </span>lifetime;
<a href=#42 id=42 data-nosnippet>42</a><span class="kw">mod </span>param_name;
<a href=#43 id=43 data-nosnippet>43</a><span class="kw">mod </span>placeholders;
<a href=#44 id=44 data-nosnippet>44</a><span class="kw">mod </span>ra_fixture;
<a href=#45 id=45 data-nosnippet>45</a><span class="kw">mod </span>range_exclusive;
<a href=#46 id=46 data-nosnippet>46</a>
<a href=#47 id=47 data-nosnippet>47</a><span class="comment">// Feature: Inlay Hints
<a href=#48 id=48 data-nosnippet>48</a>//
<a href=#49 id=49 data-nosnippet>49</a>// rust-analyzer shows additional information inline with the source code.
<a href=#50 id=50 data-nosnippet>50</a>// Editors usually render this using read-only virtual text snippets interspersed with code.
<a href=#51 id=51 data-nosnippet>51</a>//
<a href=#52 id=52 data-nosnippet>52</a>// rust-analyzer by default shows hints for
<a href=#53 id=53 data-nosnippet>53</a>//
<a href=#54 id=54 data-nosnippet>54</a>// * types of local variables
<a href=#55 id=55 data-nosnippet>55</a>// * names of function arguments
<a href=#56 id=56 data-nosnippet>56</a>// * names of const generic parameters
<a href=#57 id=57 data-nosnippet>57</a>// * types of chained expressions
<a href=#58 id=58 data-nosnippet>58</a>//
<a href=#59 id=59 data-nosnippet>59</a>// Optionally, one can enable additional hints for
<a href=#60 id=60 data-nosnippet>60</a>//
<a href=#61 id=61 data-nosnippet>61</a>// * return types of closure expressions
<a href=#62 id=62 data-nosnippet>62</a>// * elided lifetimes
<a href=#63 id=63 data-nosnippet>63</a>// * compiler inserted reborrows
<a href=#64 id=64 data-nosnippet>64</a>// * names of generic type and lifetime parameters
<a href=#65 id=65 data-nosnippet>65</a>//
<a href=#66 id=66 data-nosnippet>66</a>// Note: inlay hints for function argument names are heuristically omitted to reduce noise and will not appear if
<a href=#67 id=67 data-nosnippet>67</a>// any of the
<a href=#68 id=68 data-nosnippet>68</a>// [following criteria](https://github.com/rust-lang/rust-analyzer/blob/6b8b8ff4c56118ddee6c531cde06add1aad4a6af/crates/ide/src/inlay_hints/param_name.rs#L92-L99)
<a href=#69 id=69 data-nosnippet>69</a>// are met:
<a href=#70 id=70 data-nosnippet>70</a>//
<a href=#71 id=71 data-nosnippet>71</a>// * the parameter name is a suffix of the function's name
<a href=#72 id=72 data-nosnippet>72</a>// * the argument is a qualified constructing or call expression where the qualifier is an ADT
<a href=#73 id=73 data-nosnippet>73</a>// * exact argument&lt;-&gt;parameter match(ignoring leading underscore) or parameter is a prefix/suffix
<a href=#74 id=74 data-nosnippet>74</a>// of argument with _ splitting it off
<a href=#75 id=75 data-nosnippet>75</a>// * the parameter name starts with `ra_fixture`
<a href=#76 id=76 data-nosnippet>76</a>// * the parameter name is a
<a href=#77 id=77 data-nosnippet>77</a>// [well known name](https://github.com/rust-lang/rust-analyzer/blob/6b8b8ff4c56118ddee6c531cde06add1aad4a6af/crates/ide/src/inlay_hints/param_name.rs#L200)
<a href=#78 id=78 data-nosnippet>78</a>// in a unary function
<a href=#79 id=79 data-nosnippet>79</a>// * the parameter name is a
<a href=#80 id=80 data-nosnippet>80</a>// [single character](https://github.com/rust-lang/rust-analyzer/blob/6b8b8ff4c56118ddee6c531cde06add1aad4a6af/crates/ide/src/inlay_hints/param_name.rs#L201)
<a href=#81 id=81 data-nosnippet>81</a>// in a unary function
<a href=#82 id=82 data-nosnippet>82</a>//
<a href=#83 id=83 data-nosnippet>83</a>// ![Inlay hints](https://user-images.githubusercontent.com/48062697/113020660-b5f98b80-917a-11eb-8d70-3be3fd558cdd.png)
<a href=#84 id=84 data-nosnippet>84</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>inlay_hints(
<a href=#85 id=85 data-nosnippet>85</a> db: <span class="kw-2">&amp;</span>RootDatabase,
<a href=#86 id=86 data-nosnippet>86</a> file_id: FileId,
<a href=#87 id=87 data-nosnippet>87</a> range_limit: <span class="prelude-ty">Option</span>&lt;TextRange&gt;,
<a href=#88 id=88 data-nosnippet>88</a> config: <span class="kw-2">&amp;</span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#89 id=89 data-nosnippet>89</a>) -&gt; Vec&lt;InlayHint&gt; {
<a href=#90 id=90 data-nosnippet>90</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"inlay_hints"</span>).entered();
<a href=#91 id=91 data-nosnippet>91</a> <span class="kw">let </span>sema = Semantics::new(db);
<a href=#92 id=92 data-nosnippet>92</a> <span class="kw">let </span>file_id = sema.attach_first_edition(file_id);
<a href=#93 id=93 data-nosnippet>93</a> <span class="kw">let </span>file = sema.parse(file_id);
<a href=#94 id=94 data-nosnippet>94</a> <span class="kw">let </span>file = file.syntax();
<a href=#95 id=95 data-nosnippet>95</a>
<a href=#96 id=96 data-nosnippet>96</a> <span class="kw">let </span><span class="kw-2">mut </span>acc = Vec::new();
<a href=#97 id=97 data-nosnippet>97</a>
<a href=#98 id=98 data-nosnippet>98</a> <span class="kw">let </span><span class="prelude-val">Some</span>(scope) = sema.scope(file) <span class="kw">else </span>{
<a href=#99 id=99 data-nosnippet>99</a> <span class="kw">return </span>acc;
<a href=#100 id=100 data-nosnippet>100</a> };
<a href=#101 id=101 data-nosnippet>101</a> <span class="kw">let </span>famous_defs = FamousDefs(<span class="kw-2">&amp;</span>sema, scope.krate());
<a href=#102 id=102 data-nosnippet>102</a> <span class="kw">let </span>display_target = famous_defs.<span class="number">1</span>.to_display_target(sema.db);
<a href=#103 id=103 data-nosnippet>103</a>
<a href=#104 id=104 data-nosnippet>104</a> <span class="kw">let </span>ctx = <span class="kw-2">&amp;mut </span>InlayHintCtx::default();
<a href=#105 id=105 data-nosnippet>105</a> <span class="kw">let </span><span class="kw-2">mut </span>hints = |event| {
<a href=#106 id=106 data-nosnippet>106</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(node) = handle_event(ctx, event) {
<a href=#107 id=107 data-nosnippet>107</a> hints(<span class="kw-2">&amp;mut </span>acc, ctx, <span class="kw-2">&amp;</span>famous_defs, config, file_id, display_target, node);
<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">let </span><span class="kw-2">mut </span>preorder = file.preorder();
<a href=#111 id=111 data-nosnippet>111</a> <span class="kw">while let </span><span class="prelude-val">Some</span>(event) = preorder.next() {
<a href=#112 id=112 data-nosnippet>112</a> <span class="kw">if </span><span class="macro">matches!</span>((<span class="kw-2">&amp;</span>event, range_limit), (WalkEvent::Enter(node), <span class="prelude-val">Some</span>(range)) <span class="kw">if </span>range.intersect(node.text_range()).is_none())
<a href=#113 id=113 data-nosnippet>113</a> {
<a href=#114 id=114 data-nosnippet>114</a> preorder.skip_subtree();
<a href=#115 id=115 data-nosnippet>115</a> <span class="kw">continue</span>;
<a href=#116 id=116 data-nosnippet>116</a> }
<a href=#117 id=117 data-nosnippet>117</a> hints(event);
<a href=#118 id=118 data-nosnippet>118</a> }
<a href=#119 id=119 data-nosnippet>119</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range_limit) = range_limit {
<a href=#120 id=120 data-nosnippet>120</a> acc.retain(|hint| range_limit.contains_range(hint.range));
<a href=#121 id=121 data-nosnippet>121</a> }
<a href=#122 id=122 data-nosnippet>122</a> acc
<a href=#123 id=123 data-nosnippet>123</a>}
<a href=#124 id=124 data-nosnippet>124</a>
<a href=#125 id=125 data-nosnippet>125</a><span class="attr">#[derive(Default)]
<a href=#126 id=126 data-nosnippet>126</a></span><span class="kw">struct </span>InlayHintCtx {
<a href=#127 id=127 data-nosnippet>127</a> lifetime_stacks: Vec&lt;Vec&lt;SmolStr&gt;&gt;,
<a href=#128 id=128 data-nosnippet>128</a> extern_block_parent: <span class="prelude-ty">Option</span>&lt;ast::ExternBlock&gt;,
<a href=#129 id=129 data-nosnippet>129</a>}
<a href=#130 id=130 data-nosnippet>130</a>
<a href=#131 id=131 data-nosnippet>131</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>inlay_hints_resolve(
<a href=#132 id=132 data-nosnippet>132</a> db: <span class="kw-2">&amp;</span>RootDatabase,
<a href=#133 id=133 data-nosnippet>133</a> file_id: FileId,
<a href=#134 id=134 data-nosnippet>134</a> resolve_range: TextRange,
<a href=#135 id=135 data-nosnippet>135</a> hash: u64,
<a href=#136 id=136 data-nosnippet>136</a> config: <span class="kw-2">&amp;</span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#137 id=137 data-nosnippet>137</a> hasher: <span class="kw">impl </span>Fn(<span class="kw-2">&amp;</span>InlayHint) -&gt; u64,
<a href=#138 id=138 data-nosnippet>138</a>) -&gt; <span class="prelude-ty">Option</span>&lt;InlayHint&gt; {
<a href=#139 id=139 data-nosnippet>139</a> <span class="kw">let </span>_p = <span class="macro">tracing::info_span!</span>(<span class="string">"inlay_hints_resolve"</span>).entered();
<a href=#140 id=140 data-nosnippet>140</a> <span class="kw">let </span>sema = Semantics::new(db);
<a href=#141 id=141 data-nosnippet>141</a> <span class="kw">let </span>file_id = sema.attach_first_edition(file_id);
<a href=#142 id=142 data-nosnippet>142</a> <span class="kw">let </span>file = sema.parse(file_id);
<a href=#143 id=143 data-nosnippet>143</a> <span class="kw">let </span>file = file.syntax();
<a href=#144 id=144 data-nosnippet>144</a>
<a href=#145 id=145 data-nosnippet>145</a> <span class="kw">let </span>scope = sema.scope(file)<span class="question-mark">?</span>;
<a href=#146 id=146 data-nosnippet>146</a> <span class="kw">let </span>famous_defs = FamousDefs(<span class="kw-2">&amp;</span>sema, scope.krate());
<a href=#147 id=147 data-nosnippet>147</a> <span class="kw">let </span><span class="kw-2">mut </span>acc = Vec::new();
<a href=#148 id=148 data-nosnippet>148</a>
<a href=#149 id=149 data-nosnippet>149</a> <span class="kw">let </span>display_target = famous_defs.<span class="number">1</span>.to_display_target(sema.db);
<a href=#150 id=150 data-nosnippet>150</a>
<a href=#151 id=151 data-nosnippet>151</a> <span class="kw">let </span>ctx = <span class="kw-2">&amp;mut </span>InlayHintCtx::default();
<a href=#152 id=152 data-nosnippet>152</a> <span class="kw">let </span><span class="kw-2">mut </span>hints = |event| {
<a href=#153 id=153 data-nosnippet>153</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(node) = handle_event(ctx, event) {
<a href=#154 id=154 data-nosnippet>154</a> hints(<span class="kw-2">&amp;mut </span>acc, ctx, <span class="kw-2">&amp;</span>famous_defs, config, file_id, display_target, node);
<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>
<a href=#158 id=158 data-nosnippet>158</a> <span class="kw">let </span><span class="kw-2">mut </span>preorder = file.preorder();
<a href=#159 id=159 data-nosnippet>159</a> <span class="kw">while let </span><span class="prelude-val">Some</span>(event) = preorder.next() {
<a href=#160 id=160 data-nosnippet>160</a> <span class="comment">// FIXME: This can miss some hints that require the parent of the range to calculate
<a href=#161 id=161 data-nosnippet>161</a> </span><span class="kw">if </span><span class="macro">matches!</span>(<span class="kw-2">&amp;</span>event, WalkEvent::Enter(node) <span class="kw">if </span>resolve_range.intersect(node.text_range()).is_none())
<a href=#162 id=162 data-nosnippet>162</a> {
<a href=#163 id=163 data-nosnippet>163</a> preorder.skip_subtree();
<a href=#164 id=164 data-nosnippet>164</a> <span class="kw">continue</span>;
<a href=#165 id=165 data-nosnippet>165</a> }
<a href=#166 id=166 data-nosnippet>166</a> hints(event);
<a href=#167 id=167 data-nosnippet>167</a> }
<a href=#168 id=168 data-nosnippet>168</a> acc.into_iter().find(|hint| hasher(hint) == hash)
<a href=#169 id=169 data-nosnippet>169</a>}
<a href=#170 id=170 data-nosnippet>170</a>
<a href=#171 id=171 data-nosnippet>171</a><span class="kw">fn </span>handle_event(ctx: <span class="kw-2">&amp;mut </span>InlayHintCtx, node: WalkEvent&lt;SyntaxNode&gt;) -&gt; <span class="prelude-ty">Option</span>&lt;SyntaxNode&gt; {
<a href=#172 id=172 data-nosnippet>172</a> <span class="kw">match </span>node {
<a href=#173 id=173 data-nosnippet>173</a> WalkEvent::Enter(node) =&gt; {
<a href=#174 id=174 data-nosnippet>174</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(node) = ast::AnyHasGenericParams::cast(node.clone()) {
<a href=#175 id=175 data-nosnippet>175</a> <span class="kw">let </span>params = node
<a href=#176 id=176 data-nosnippet>176</a> .generic_param_list()
<a href=#177 id=177 data-nosnippet>177</a> .map(|it| {
<a href=#178 id=178 data-nosnippet>178</a> it.lifetime_params()
<a href=#179 id=179 data-nosnippet>179</a> .filter_map(|it| {
<a href=#180 id=180 data-nosnippet>180</a> it.lifetime().map(|it| <span class="macro">format_smolstr!</span>(<span class="string">"{}"</span>, <span class="kw-2">&amp;</span>it.text()[<span class="number">1</span>..]))
<a href=#181 id=181 data-nosnippet>181</a> })
<a href=#182 id=182 data-nosnippet>182</a> .collect()
<a href=#183 id=183 data-nosnippet>183</a> })
<a href=#184 id=184 data-nosnippet>184</a> .unwrap_or_default();
<a href=#185 id=185 data-nosnippet>185</a> ctx.lifetime_stacks.push(params);
<a href=#186 id=186 data-nosnippet>186</a> }
<a href=#187 id=187 data-nosnippet>187</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(node) = ast::ExternBlock::cast(node.clone()) {
<a href=#188 id=188 data-nosnippet>188</a> ctx.extern_block_parent = <span class="prelude-val">Some</span>(node);
<a href=#189 id=189 data-nosnippet>189</a> }
<a href=#190 id=190 data-nosnippet>190</a> <span class="prelude-val">Some</span>(node)
<a href=#191 id=191 data-nosnippet>191</a> }
<a href=#192 id=192 data-nosnippet>192</a> WalkEvent::Leave(n) =&gt; {
<a href=#193 id=193 data-nosnippet>193</a> <span class="kw">if </span>ast::AnyHasGenericParams::can_cast(n.kind()) {
<a href=#194 id=194 data-nosnippet>194</a> ctx.lifetime_stacks.pop();
<a href=#195 id=195 data-nosnippet>195</a> }
<a href=#196 id=196 data-nosnippet>196</a> <span class="kw">if </span>ast::ExternBlock::can_cast(n.kind()) {
<a href=#197 id=197 data-nosnippet>197</a> ctx.extern_block_parent = <span class="prelude-val">None</span>;
<a href=#198 id=198 data-nosnippet>198</a> }
<a href=#199 id=199 data-nosnippet>199</a> <span class="prelude-val">None
<a href=#200 id=200 data-nosnippet>200</a> </span>}
<a href=#201 id=201 data-nosnippet>201</a> }
<a href=#202 id=202 data-nosnippet>202</a>}
<a href=#203 id=203 data-nosnippet>203</a>
<a href=#204 id=204 data-nosnippet>204</a><span class="comment">// FIXME: At some point when our hir infra is fleshed out enough we should flip this and traverse the
<a href=#205 id=205 data-nosnippet>205</a>// HIR instead of the syntax tree.
<a href=#206 id=206 data-nosnippet>206</a></span><span class="kw">fn </span>hints(
<a href=#207 id=207 data-nosnippet>207</a> hints: <span class="kw-2">&amp;mut </span>Vec&lt;InlayHint&gt;,
<a href=#208 id=208 data-nosnippet>208</a> ctx: <span class="kw-2">&amp;mut </span>InlayHintCtx,
<a href=#209 id=209 data-nosnippet>209</a> famous_defs @ FamousDefs(sema, _krate): <span class="kw-2">&amp;</span>FamousDefs&lt;<span class="lifetime">'_</span>, <span class="lifetime">'_</span>&gt;,
<a href=#210 id=210 data-nosnippet>210</a> config: <span class="kw-2">&amp;</span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#211 id=211 data-nosnippet>211</a> file_id: EditionedFileId,
<a href=#212 id=212 data-nosnippet>212</a> display_target: DisplayTarget,
<a href=#213 id=213 data-nosnippet>213</a> node: SyntaxNode,
<a href=#214 id=214 data-nosnippet>214</a>) {
<a href=#215 id=215 data-nosnippet>215</a> closing_brace::hints(
<a href=#216 id=216 data-nosnippet>216</a> hints,
<a href=#217 id=217 data-nosnippet>217</a> sema,
<a href=#218 id=218 data-nosnippet>218</a> config,
<a href=#219 id=219 data-nosnippet>219</a> display_target,
<a href=#220 id=220 data-nosnippet>220</a> InRealFile { file_id, value: node.clone() },
<a href=#221 id=221 data-nosnippet>221</a> );
<a href=#222 id=222 data-nosnippet>222</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(any_has_generic_args) = ast::AnyHasGenericArgs::cast(node.clone()) {
<a href=#223 id=223 data-nosnippet>223</a> generic_param::hints(hints, famous_defs, config, any_has_generic_args);
<a href=#224 id=224 data-nosnippet>224</a> }
<a href=#225 id=225 data-nosnippet>225</a>
<a href=#226 id=226 data-nosnippet>226</a> <span class="macro">match_ast!</span> {
<a href=#227 id=227 data-nosnippet>227</a> <span class="kw">match </span>node {
<a href=#228 id=228 data-nosnippet>228</a> ast::Expr(expr) =&gt; {
<a href=#229 id=229 data-nosnippet>229</a> chaining::hints(hints, famous_defs, config, display_target, <span class="kw-2">&amp;</span>expr);
<a href=#230 id=230 data-nosnippet>230</a> adjustment::hints(hints, famous_defs, config, display_target, <span class="kw-2">&amp;</span>expr);
<a href=#231 id=231 data-nosnippet>231</a> <span class="kw">match </span>expr {
<a href=#232 id=232 data-nosnippet>232</a> ast::Expr::CallExpr(it) =&gt; param_name::hints(hints, famous_defs, config, file_id, ast::Expr::from(it)),
<a href=#233 id=233 data-nosnippet>233</a> ast::Expr::MethodCallExpr(it) =&gt; {
<a href=#234 id=234 data-nosnippet>234</a> param_name::hints(hints, famous_defs, config, file_id, ast::Expr::from(it))
<a href=#235 id=235 data-nosnippet>235</a> }
<a href=#236 id=236 data-nosnippet>236</a> ast::Expr::ClosureExpr(it) =&gt; {
<a href=#237 id=237 data-nosnippet>237</a> closure_captures::hints(hints, famous_defs, config, it.clone());
<a href=#238 id=238 data-nosnippet>238</a> closure_ret::hints(hints, famous_defs, config, display_target, it)
<a href=#239 id=239 data-nosnippet>239</a> },
<a href=#240 id=240 data-nosnippet>240</a> ast::Expr::RangeExpr(it) =&gt; range_exclusive::hints(hints, famous_defs, config, it),
<a href=#241 id=241 data-nosnippet>241</a> ast::Expr::Literal(it) =&gt; ra_fixture::hints(hints, famous_defs.<span class="number">0</span>, file_id, config, it),
<a href=#242 id=242 data-nosnippet>242</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">Some</span>(()),
<a href=#243 id=243 data-nosnippet>243</a> }
<a href=#244 id=244 data-nosnippet>244</a> },
<a href=#245 id=245 data-nosnippet>245</a> ast::Pat(it) =&gt; {
<a href=#246 id=246 data-nosnippet>246</a> binding_mode::hints(hints, famous_defs, config, <span class="kw-2">&amp;</span>it);
<a href=#247 id=247 data-nosnippet>247</a> <span class="kw">match </span>it {
<a href=#248 id=248 data-nosnippet>248</a> ast::Pat::IdentPat(it) =&gt; {
<a href=#249 id=249 data-nosnippet>249</a> bind_pat::hints(hints, famous_defs, config, display_target, <span class="kw-2">&amp;</span>it);
<a href=#250 id=250 data-nosnippet>250</a> }
<a href=#251 id=251 data-nosnippet>251</a> ast::Pat::RangePat(it) =&gt; {
<a href=#252 id=252 data-nosnippet>252</a> range_exclusive::hints(hints, famous_defs, config, it);
<a href=#253 id=253 data-nosnippet>253</a> }
<a href=#254 id=254 data-nosnippet>254</a> <span class="kw">_ </span>=&gt; {}
<a href=#255 id=255 data-nosnippet>255</a> }
<a href=#256 id=256 data-nosnippet>256</a> <span class="prelude-val">Some</span>(())
<a href=#257 id=257 data-nosnippet>257</a> },
<a href=#258 id=258 data-nosnippet>258</a> ast::Item(it) =&gt; <span class="kw">match </span>it {
<a href=#259 id=259 data-nosnippet>259</a> ast::Item::Fn(it) =&gt; {
<a href=#260 id=260 data-nosnippet>260</a> implicit_drop::hints(hints, famous_defs, config, display_target, <span class="kw-2">&amp;</span>it);
<a href=#261 id=261 data-nosnippet>261</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(extern_block) = <span class="kw-2">&amp;</span>ctx.extern_block_parent {
<a href=#262 id=262 data-nosnippet>262</a> extern_block::fn_hints(hints, famous_defs, config, <span class="kw-2">&amp;</span>it, extern_block);
<a href=#263 id=263 data-nosnippet>263</a> }
<a href=#264 id=264 data-nosnippet>264</a> lifetime::fn_hints(hints, ctx, famous_defs, config, it)
<a href=#265 id=265 data-nosnippet>265</a> },
<a href=#266 id=266 data-nosnippet>266</a> ast::Item::Static(it) =&gt; {
<a href=#267 id=267 data-nosnippet>267</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(extern_block) = <span class="kw-2">&amp;</span>ctx.extern_block_parent {
<a href=#268 id=268 data-nosnippet>268</a> extern_block::static_hints(hints, famous_defs, config, <span class="kw-2">&amp;</span>it, extern_block);
<a href=#269 id=269 data-nosnippet>269</a> }
<a href=#270 id=270 data-nosnippet>270</a> implicit_static::hints(hints, famous_defs, config, Either::Left(it))
<a href=#271 id=271 data-nosnippet>271</a> },
<a href=#272 id=272 data-nosnippet>272</a> ast::Item::Const(it) =&gt; implicit_static::hints(hints, famous_defs, config, Either::Right(it)),
<a href=#273 id=273 data-nosnippet>273</a> ast::Item::Enum(it) =&gt; discriminant::enum_hints(hints, famous_defs, config, it),
<a href=#274 id=274 data-nosnippet>274</a> ast::Item::ExternBlock(it) =&gt; extern_block::extern_block_hints(hints, famous_defs, config, it),
<a href=#275 id=275 data-nosnippet>275</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#276 id=276 data-nosnippet>276</a> },
<a href=#277 id=277 data-nosnippet>277</a> <span class="comment">// FIXME: trait object type elisions
<a href=#278 id=278 data-nosnippet>278</a> </span>ast::Type(ty) =&gt; <span class="kw">match </span>ty {
<a href=#279 id=279 data-nosnippet>279</a> ast::Type::FnPtrType(ptr) =&gt; lifetime::fn_ptr_hints(hints, ctx, famous_defs, config, ptr),
<a href=#280 id=280 data-nosnippet>280</a> ast::Type::PathType(path) =&gt; {
<a href=#281 id=281 data-nosnippet>281</a> lifetime::fn_path_hints(hints, ctx, famous_defs, config, <span class="kw-2">&amp;</span>path);
<a href=#282 id=282 data-nosnippet>282</a> implied_dyn_trait::hints(hints, famous_defs, config, Either::Left(path));
<a href=#283 id=283 data-nosnippet>283</a> <span class="prelude-val">Some</span>(())
<a href=#284 id=284 data-nosnippet>284</a> },
<a href=#285 id=285 data-nosnippet>285</a> ast::Type::DynTraitType(dyn_) =&gt; {
<a href=#286 id=286 data-nosnippet>286</a> implied_dyn_trait::hints(hints, famous_defs, config, Either::Right(dyn_));
<a href=#287 id=287 data-nosnippet>287</a> <span class="prelude-val">Some</span>(())
<a href=#288 id=288 data-nosnippet>288</a> },
<a href=#289 id=289 data-nosnippet>289</a> ast::Type::InferType(placeholder) =&gt; {
<a href=#290 id=290 data-nosnippet>290</a> placeholders::type_hints(hints, famous_defs, config, display_target, placeholder);
<a href=#291 id=291 data-nosnippet>291</a> <span class="prelude-val">Some</span>(())
<a href=#292 id=292 data-nosnippet>292</a> },
<a href=#293 id=293 data-nosnippet>293</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">Some</span>(()),
<a href=#294 id=294 data-nosnippet>294</a> },
<a href=#295 id=295 data-nosnippet>295</a> ast::GenericParamList(it) =&gt; bounds::hints(hints, famous_defs, config, it),
<a href=#296 id=296 data-nosnippet>296</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">Some</span>(()),
<a href=#297 id=297 data-nosnippet>297</a> }
<a href=#298 id=298 data-nosnippet>298</a> };
<a href=#299 id=299 data-nosnippet>299</a>}
<a href=#300 id=300 data-nosnippet>300</a>
<a href=#301 id=301 data-nosnippet>301</a><span class="attr">#[derive(Clone, Debug)]
<a href=#302 id=302 data-nosnippet>302</a></span><span class="kw">pub struct </span>InlayHintsConfig&lt;<span class="lifetime">'a</span>&gt; {
<a href=#303 id=303 data-nosnippet>303</a> <span class="kw">pub </span>render_colons: bool,
<a href=#304 id=304 data-nosnippet>304</a> <span class="kw">pub </span>type_hints: bool,
<a href=#305 id=305 data-nosnippet>305</a> <span class="kw">pub </span>sized_bound: bool,
<a href=#306 id=306 data-nosnippet>306</a> <span class="kw">pub </span>discriminant_hints: DiscriminantHints,
<a href=#307 id=307 data-nosnippet>307</a> <span class="kw">pub </span>parameter_hints: bool,
<a href=#308 id=308 data-nosnippet>308</a> <span class="kw">pub </span>parameter_hints_for_missing_arguments: bool,
<a href=#309 id=309 data-nosnippet>309</a> <span class="kw">pub </span>generic_parameter_hints: GenericParameterHints,
<a href=#310 id=310 data-nosnippet>310</a> <span class="kw">pub </span>chaining_hints: bool,
<a href=#311 id=311 data-nosnippet>311</a> <span class="kw">pub </span>adjustment_hints: AdjustmentHints,
<a href=#312 id=312 data-nosnippet>312</a> <span class="kw">pub </span>adjustment_hints_disable_reborrows: bool,
<a href=#313 id=313 data-nosnippet>313</a> <span class="kw">pub </span>adjustment_hints_mode: AdjustmentHintsMode,
<a href=#314 id=314 data-nosnippet>314</a> <span class="kw">pub </span>adjustment_hints_hide_outside_unsafe: bool,
<a href=#315 id=315 data-nosnippet>315</a> <span class="kw">pub </span>closure_return_type_hints: ClosureReturnTypeHints,
<a href=#316 id=316 data-nosnippet>316</a> <span class="kw">pub </span>closure_capture_hints: bool,
<a href=#317 id=317 data-nosnippet>317</a> <span class="kw">pub </span>binding_mode_hints: bool,
<a href=#318 id=318 data-nosnippet>318</a> <span class="kw">pub </span>implicit_drop_hints: bool,
<a href=#319 id=319 data-nosnippet>319</a> <span class="kw">pub </span>implied_dyn_trait_hints: bool,
<a href=#320 id=320 data-nosnippet>320</a> <span class="kw">pub </span>lifetime_elision_hints: LifetimeElisionHints,
<a href=#321 id=321 data-nosnippet>321</a> <span class="kw">pub </span>param_names_for_lifetime_elision_hints: bool,
<a href=#322 id=322 data-nosnippet>322</a> <span class="kw">pub </span>hide_inferred_type_hints: bool,
<a href=#323 id=323 data-nosnippet>323</a> <span class="kw">pub </span>hide_named_constructor_hints: bool,
<a href=#324 id=324 data-nosnippet>324</a> <span class="kw">pub </span>hide_closure_initialization_hints: bool,
<a href=#325 id=325 data-nosnippet>325</a> <span class="kw">pub </span>hide_closure_parameter_hints: bool,
<a href=#326 id=326 data-nosnippet>326</a> <span class="kw">pub </span>range_exclusive_hints: bool,
<a href=#327 id=327 data-nosnippet>327</a> <span class="kw">pub </span>closure_style: ClosureStyle,
<a href=#328 id=328 data-nosnippet>328</a> <span class="kw">pub </span>max_length: <span class="prelude-ty">Option</span>&lt;usize&gt;,
<a href=#329 id=329 data-nosnippet>329</a> <span class="kw">pub </span>closing_brace_hints_min_lines: <span class="prelude-ty">Option</span>&lt;usize&gt;,
<a href=#330 id=330 data-nosnippet>330</a> <span class="kw">pub </span>fields_to_resolve: InlayFieldsToResolve,
<a href=#331 id=331 data-nosnippet>331</a> <span class="kw">pub </span>minicore: MiniCore&lt;<span class="lifetime">'a</span>&gt;,
<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="kw">impl </span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt; {
<a href=#335 id=335 data-nosnippet>335</a> <span class="kw">fn </span>lazy_text_edit(<span class="kw-2">&amp;</span><span class="self">self</span>, finish: <span class="kw">impl </span>FnOnce() -&gt; TextEdit) -&gt; LazyProperty&lt;TextEdit&gt; {
<a href=#336 id=336 data-nosnippet>336</a> <span class="kw">if </span><span class="self">self</span>.fields_to_resolve.resolve_text_edits {
<a href=#337 id=337 data-nosnippet>337</a> LazyProperty::Lazy
<a href=#338 id=338 data-nosnippet>338</a> } <span class="kw">else </span>{
<a href=#339 id=339 data-nosnippet>339</a> <span class="kw">let </span>edit = finish();
<a href=#340 id=340 data-nosnippet>340</a> <span class="macro">never!</span>(edit.is_empty(), <span class="string">"inlay hint produced an empty text edit"</span>);
<a href=#341 id=341 data-nosnippet>341</a> LazyProperty::Computed(edit)
<a href=#342 id=342 data-nosnippet>342</a> }
<a href=#343 id=343 data-nosnippet>343</a> }
<a href=#344 id=344 data-nosnippet>344</a>
<a href=#345 id=345 data-nosnippet>345</a> <span class="kw">fn </span>lazy_tooltip(<span class="kw-2">&amp;</span><span class="self">self</span>, finish: <span class="kw">impl </span>FnOnce() -&gt; InlayTooltip) -&gt; LazyProperty&lt;InlayTooltip&gt; {
<a href=#346 id=346 data-nosnippet>346</a> <span class="kw">if </span><span class="self">self</span>.fields_to_resolve.resolve_hint_tooltip
<a href=#347 id=347 data-nosnippet>347</a> &amp;&amp; <span class="self">self</span>.fields_to_resolve.resolve_label_tooltip
<a href=#348 id=348 data-nosnippet>348</a> {
<a href=#349 id=349 data-nosnippet>349</a> LazyProperty::Lazy
<a href=#350 id=350 data-nosnippet>350</a> } <span class="kw">else </span>{
<a href=#351 id=351 data-nosnippet>351</a> <span class="kw">let </span>tooltip = finish();
<a href=#352 id=352 data-nosnippet>352</a> <span class="macro">never!</span>(
<a href=#353 id=353 data-nosnippet>353</a> <span class="kw">match </span><span class="kw-2">&amp;</span>tooltip {
<a href=#354 id=354 data-nosnippet>354</a> InlayTooltip::String(s) =&gt; s,
<a href=#355 id=355 data-nosnippet>355</a> InlayTooltip::Markdown(s) =&gt; s,
<a href=#356 id=356 data-nosnippet>356</a> }
<a href=#357 id=357 data-nosnippet>357</a> .is_empty(),
<a href=#358 id=358 data-nosnippet>358</a> <span class="string">"inlay hint produced an empty tooltip"
<a href=#359 id=359 data-nosnippet>359</a> </span>);
<a href=#360 id=360 data-nosnippet>360</a> LazyProperty::Computed(tooltip)
<a href=#361 id=361 data-nosnippet>361</a> }
<a href=#362 id=362 data-nosnippet>362</a> }
<a href=#363 id=363 data-nosnippet>363</a>
<a href=#364 id=364 data-nosnippet>364</a> <span class="doccomment">/// This always reports a resolvable location, so only use this when it is very likely for a
<a href=#365 id=365 data-nosnippet>365</a> /// location link to actually resolve but where computing `finish` would be costly.
<a href=#366 id=366 data-nosnippet>366</a> </span><span class="kw">fn </span>lazy_location_opt(
<a href=#367 id=367 data-nosnippet>367</a> <span class="kw-2">&amp;</span><span class="self">self</span>,
<a href=#368 id=368 data-nosnippet>368</a> finish: <span class="kw">impl </span>FnOnce() -&gt; <span class="prelude-ty">Option</span>&lt;FileRange&gt;,
<a href=#369 id=369 data-nosnippet>369</a> ) -&gt; <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;FileRange&gt;&gt; {
<a href=#370 id=370 data-nosnippet>370</a> <span class="kw">if </span><span class="self">self</span>.fields_to_resolve.resolve_label_location {
<a href=#371 id=371 data-nosnippet>371</a> <span class="prelude-val">Some</span>(LazyProperty::Lazy)
<a href=#372 id=372 data-nosnippet>372</a> } <span class="kw">else </span>{
<a href=#373 id=373 data-nosnippet>373</a> finish().map(LazyProperty::Computed)
<a href=#374 id=374 data-nosnippet>374</a> }
<a href=#375 id=375 data-nosnippet>375</a> }
<a href=#376 id=376 data-nosnippet>376</a>}
<a href=#377 id=377 data-nosnippet>377</a>
<a href=#378 id=378 data-nosnippet>378</a><span class="attr">#[derive(Copy, Clone, Debug, PartialEq, Eq)]
<a href=#379 id=379 data-nosnippet>379</a></span><span class="kw">pub struct </span>InlayFieldsToResolve {
<a href=#380 id=380 data-nosnippet>380</a> <span class="kw">pub </span>resolve_text_edits: bool,
<a href=#381 id=381 data-nosnippet>381</a> <span class="kw">pub </span>resolve_hint_tooltip: bool,
<a href=#382 id=382 data-nosnippet>382</a> <span class="kw">pub </span>resolve_label_tooltip: bool,
<a href=#383 id=383 data-nosnippet>383</a> <span class="kw">pub </span>resolve_label_location: bool,
<a href=#384 id=384 data-nosnippet>384</a> <span class="kw">pub </span>resolve_label_command: bool,
<a href=#385 id=385 data-nosnippet>385</a>}
<a href=#386 id=386 data-nosnippet>386</a>
<a href=#387 id=387 data-nosnippet>387</a><span class="kw">impl </span>InlayFieldsToResolve {
<a href=#388 id=388 data-nosnippet>388</a> <span class="kw">pub fn </span>from_client_capabilities(client_capability_fields: <span class="kw-2">&amp;</span>FxHashSet&lt;<span class="kw-2">&amp;</span>str&gt;) -&gt; <span class="self">Self </span>{
<a href=#389 id=389 data-nosnippet>389</a> <span class="self">Self </span>{
<a href=#390 id=390 data-nosnippet>390</a> resolve_text_edits: client_capability_fields.contains(<span class="string">"textEdits"</span>),
<a href=#391 id=391 data-nosnippet>391</a> resolve_hint_tooltip: client_capability_fields.contains(<span class="string">"tooltip"</span>),
<a href=#392 id=392 data-nosnippet>392</a> resolve_label_tooltip: client_capability_fields.contains(<span class="string">"label.tooltip"</span>),
<a href=#393 id=393 data-nosnippet>393</a> resolve_label_location: client_capability_fields.contains(<span class="string">"label.location"</span>),
<a href=#394 id=394 data-nosnippet>394</a> resolve_label_command: client_capability_fields.contains(<span class="string">"label.command"</span>),
<a href=#395 id=395 data-nosnippet>395</a> }
<a href=#396 id=396 data-nosnippet>396</a> }
<a href=#397 id=397 data-nosnippet>397</a>
<a href=#398 id=398 data-nosnippet>398</a> <span class="kw">pub const fn </span>empty() -&gt; <span class="self">Self </span>{
<a href=#399 id=399 data-nosnippet>399</a> <span class="self">Self </span>{
<a href=#400 id=400 data-nosnippet>400</a> resolve_text_edits: <span class="bool-val">false</span>,
<a href=#401 id=401 data-nosnippet>401</a> resolve_hint_tooltip: <span class="bool-val">false</span>,
<a href=#402 id=402 data-nosnippet>402</a> resolve_label_tooltip: <span class="bool-val">false</span>,
<a href=#403 id=403 data-nosnippet>403</a> resolve_label_location: <span class="bool-val">false</span>,
<a href=#404 id=404 data-nosnippet>404</a> resolve_label_command: <span class="bool-val">false</span>,
<a href=#405 id=405 data-nosnippet>405</a> }
<a href=#406 id=406 data-nosnippet>406</a> }
<a href=#407 id=407 data-nosnippet>407</a>}
<a href=#408 id=408 data-nosnippet>408</a>
<a href=#409 id=409 data-nosnippet>409</a><span class="attr">#[derive(Clone, Debug, PartialEq, Eq)]
<a href=#410 id=410 data-nosnippet>410</a></span><span class="kw">pub enum </span>ClosureReturnTypeHints {
<a href=#411 id=411 data-nosnippet>411</a> Always,
<a href=#412 id=412 data-nosnippet>412</a> WithBlock,
<a href=#413 id=413 data-nosnippet>413</a> Never,
<a href=#414 id=414 data-nosnippet>414</a>}
<a href=#415 id=415 data-nosnippet>415</a>
<a href=#416 id=416 data-nosnippet>416</a><span class="attr">#[derive(Clone, Debug, PartialEq, Eq)]
<a href=#417 id=417 data-nosnippet>417</a></span><span class="kw">pub enum </span>DiscriminantHints {
<a href=#418 id=418 data-nosnippet>418</a> Always,
<a href=#419 id=419 data-nosnippet>419</a> Never,
<a href=#420 id=420 data-nosnippet>420</a> Fieldless,
<a href=#421 id=421 data-nosnippet>421</a>}
<a href=#422 id=422 data-nosnippet>422</a>
<a href=#423 id=423 data-nosnippet>423</a><span class="attr">#[derive(Clone, Debug, PartialEq, Eq)]
<a href=#424 id=424 data-nosnippet>424</a></span><span class="kw">pub struct </span>GenericParameterHints {
<a href=#425 id=425 data-nosnippet>425</a> <span class="kw">pub </span>type_hints: bool,
<a href=#426 id=426 data-nosnippet>426</a> <span class="kw">pub </span>lifetime_hints: bool,
<a href=#427 id=427 data-nosnippet>427</a> <span class="kw">pub </span>const_hints: bool,
<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="attr">#[derive(Clone, Debug, PartialEq, Eq)]
<a href=#431 id=431 data-nosnippet>431</a></span><span class="kw">pub enum </span>LifetimeElisionHints {
<a href=#432 id=432 data-nosnippet>432</a> Always,
<a href=#433 id=433 data-nosnippet>433</a> SkipTrivial,
<a href=#434 id=434 data-nosnippet>434</a> Never,
<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="attr">#[derive(Clone, Debug, PartialEq, Eq)]
<a href=#438 id=438 data-nosnippet>438</a></span><span class="kw">pub enum </span>AdjustmentHints {
<a href=#439 id=439 data-nosnippet>439</a> Always,
<a href=#440 id=440 data-nosnippet>440</a> BorrowsOnly,
<a href=#441 id=441 data-nosnippet>441</a> Never,
<a href=#442 id=442 data-nosnippet>442</a>}
<a href=#443 id=443 data-nosnippet>443</a>
<a href=#444 id=444 data-nosnippet>444</a><span class="attr">#[derive(Copy, Clone, Debug, PartialEq, Eq)]
<a href=#445 id=445 data-nosnippet>445</a></span><span class="kw">pub enum </span>AdjustmentHintsMode {
<a href=#446 id=446 data-nosnippet>446</a> Prefix,
<a href=#447 id=447 data-nosnippet>447</a> Postfix,
<a href=#448 id=448 data-nosnippet>448</a> PreferPrefix,
<a href=#449 id=449 data-nosnippet>449</a> PreferPostfix,
<a href=#450 id=450 data-nosnippet>450</a>}
<a href=#451 id=451 data-nosnippet>451</a>
<a href=#452 id=452 data-nosnippet>452</a><span class="attr">#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
<a href=#453 id=453 data-nosnippet>453</a></span><span class="kw">pub enum </span>InlayKind {
<a href=#454 id=454 data-nosnippet>454</a> Adjustment,
<a href=#455 id=455 data-nosnippet>455</a> BindingMode,
<a href=#456 id=456 data-nosnippet>456</a> Chaining,
<a href=#457 id=457 data-nosnippet>457</a> ClosingBrace,
<a href=#458 id=458 data-nosnippet>458</a> ClosureCapture,
<a href=#459 id=459 data-nosnippet>459</a> Discriminant,
<a href=#460 id=460 data-nosnippet>460</a> GenericParamList,
<a href=#461 id=461 data-nosnippet>461</a> Lifetime,
<a href=#462 id=462 data-nosnippet>462</a> Parameter,
<a href=#463 id=463 data-nosnippet>463</a> GenericParameter,
<a href=#464 id=464 data-nosnippet>464</a> Type,
<a href=#465 id=465 data-nosnippet>465</a> Dyn,
<a href=#466 id=466 data-nosnippet>466</a> Drop,
<a href=#467 id=467 data-nosnippet>467</a> RangeExclusive,
<a href=#468 id=468 data-nosnippet>468</a> ExternUnsafety,
<a href=#469 id=469 data-nosnippet>469</a>}
<a href=#470 id=470 data-nosnippet>470</a>
<a href=#471 id=471 data-nosnippet>471</a><span class="attr">#[derive(Debug, Hash)]
<a href=#472 id=472 data-nosnippet>472</a></span><span class="kw">pub enum </span>InlayHintPosition {
<a href=#473 id=473 data-nosnippet>473</a> Before,
<a href=#474 id=474 data-nosnippet>474</a> After,
<a href=#475 id=475 data-nosnippet>475</a>}
<a href=#476 id=476 data-nosnippet>476</a>
<a href=#477 id=477 data-nosnippet>477</a><span class="attr">#[derive(Debug, UpmapFromRaFixture)]
<a href=#478 id=478 data-nosnippet>478</a></span><span class="kw">pub struct </span>InlayHint {
<a href=#479 id=479 data-nosnippet>479</a> <span class="doccomment">/// The text range this inlay hint applies to.
<a href=#480 id=480 data-nosnippet>480</a> </span><span class="kw">pub </span>range: TextRange,
<a href=#481 id=481 data-nosnippet>481</a> <span class="kw">pub </span>position: InlayHintPosition,
<a href=#482 id=482 data-nosnippet>482</a> <span class="kw">pub </span>pad_left: bool,
<a href=#483 id=483 data-nosnippet>483</a> <span class="kw">pub </span>pad_right: bool,
<a href=#484 id=484 data-nosnippet>484</a> <span class="doccomment">/// The kind of this inlay hint.
<a href=#485 id=485 data-nosnippet>485</a> </span><span class="kw">pub </span>kind: InlayKind,
<a href=#486 id=486 data-nosnippet>486</a> <span class="doccomment">/// The actual label to show in the inlay hint.
<a href=#487 id=487 data-nosnippet>487</a> </span><span class="kw">pub </span>label: InlayHintLabel,
<a href=#488 id=488 data-nosnippet>488</a> <span class="doccomment">/// Text edit to apply when "accepting" this inlay hint.
<a href=#489 id=489 data-nosnippet>489</a> </span><span class="kw">pub </span>text_edit: <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;TextEdit&gt;&gt;,
<a href=#490 id=490 data-nosnippet>490</a> <span class="doccomment">/// Range to recompute inlay hints when trying to resolve for this hint. If this is none, the
<a href=#491 id=491 data-nosnippet>491</a> /// hint does not support resolving.
<a href=#492 id=492 data-nosnippet>492</a> </span><span class="kw">pub </span>resolve_parent: <span class="prelude-ty">Option</span>&lt;TextRange&gt;,
<a href=#493 id=493 data-nosnippet>493</a>}
<a href=#494 id=494 data-nosnippet>494</a>
<a href=#495 id=495 data-nosnippet>495</a><span class="doccomment">/// A type signaling that a value is either computed, or is available for computation.
<a href=#496 id=496 data-nosnippet>496</a></span><span class="attr">#[derive(Clone, Debug, Default, UpmapFromRaFixture)]
<a href=#497 id=497 data-nosnippet>497</a></span><span class="kw">pub enum </span>LazyProperty&lt;T&gt; {
<a href=#498 id=498 data-nosnippet>498</a> Computed(T),
<a href=#499 id=499 data-nosnippet>499</a> <span class="attr">#[default]
<a href=#500 id=500 data-nosnippet>500</a> </span>Lazy,
<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><span class="kw">impl</span>&lt;T&gt; LazyProperty&lt;T&gt; {
<a href=#504 id=504 data-nosnippet>504</a> <span class="kw">pub fn </span>computed(<span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;T&gt; {
<a href=#505 id=505 data-nosnippet>505</a> <span class="kw">match </span><span class="self">self </span>{
<a href=#506 id=506 data-nosnippet>506</a> LazyProperty::Computed(it) =&gt; <span class="prelude-val">Some</span>(it),
<a href=#507 id=507 data-nosnippet>507</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#508 id=508 data-nosnippet>508</a> }
<a href=#509 id=509 data-nosnippet>509</a> }
<a href=#510 id=510 data-nosnippet>510</a>
<a href=#511 id=511 data-nosnippet>511</a> <span class="kw">pub fn </span>is_lazy(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<a href=#512 id=512 data-nosnippet>512</a> <span class="macro">matches!</span>(<span class="self">self</span>, <span class="self">Self</span>::Lazy)
<a href=#513 id=513 data-nosnippet>513</a> }
<a href=#514 id=514 data-nosnippet>514</a>}
<a href=#515 id=515 data-nosnippet>515</a>
<a href=#516 id=516 data-nosnippet>516</a><span class="kw">impl </span>std::hash::Hash <span class="kw">for </span>InlayHint {
<a href=#517 id=517 data-nosnippet>517</a> <span class="kw">fn </span>hash&lt;H: std::hash::Hasher&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, state: <span class="kw-2">&amp;mut </span>H) {
<a href=#518 id=518 data-nosnippet>518</a> <span class="self">self</span>.range.hash(state);
<a href=#519 id=519 data-nosnippet>519</a> <span class="self">self</span>.position.hash(state);
<a href=#520 id=520 data-nosnippet>520</a> <span class="self">self</span>.pad_left.hash(state);
<a href=#521 id=521 data-nosnippet>521</a> <span class="self">self</span>.pad_right.hash(state);
<a href=#522 id=522 data-nosnippet>522</a> <span class="self">self</span>.kind.hash(state);
<a href=#523 id=523 data-nosnippet>523</a> <span class="self">self</span>.label.hash(state);
<a href=#524 id=524 data-nosnippet>524</a> mem::discriminant(<span class="kw-2">&amp;</span><span class="self">self</span>.text_edit).hash(state);
<a href=#525 id=525 data-nosnippet>525</a> }
<a href=#526 id=526 data-nosnippet>526</a>}
<a href=#527 id=527 data-nosnippet>527</a>
<a href=#528 id=528 data-nosnippet>528</a><span class="kw">impl </span>InlayHint {
<a href=#529 id=529 data-nosnippet>529</a> <span class="kw">fn </span>closing_paren_after(kind: InlayKind, range: TextRange) -&gt; InlayHint {
<a href=#530 id=530 data-nosnippet>530</a> InlayHint {
<a href=#531 id=531 data-nosnippet>531</a> range,
<a href=#532 id=532 data-nosnippet>532</a> kind,
<a href=#533 id=533 data-nosnippet>533</a> label: InlayHintLabel::from(<span class="string">")"</span>),
<a href=#534 id=534 data-nosnippet>534</a> text_edit: <span class="prelude-val">None</span>,
<a href=#535 id=535 data-nosnippet>535</a> position: InlayHintPosition::After,
<a href=#536 id=536 data-nosnippet>536</a> pad_left: <span class="bool-val">false</span>,
<a href=#537 id=537 data-nosnippet>537</a> pad_right: <span class="bool-val">false</span>,
<a href=#538 id=538 data-nosnippet>538</a> resolve_parent: <span class="prelude-val">None</span>,
<a href=#539 id=539 data-nosnippet>539</a> }
<a href=#540 id=540 data-nosnippet>540</a> }
<a href=#541 id=541 data-nosnippet>541</a>}
<a href=#542 id=542 data-nosnippet>542</a>
<a href=#543 id=543 data-nosnippet>543</a><span class="attr">#[derive(Debug, Hash)]
<a href=#544 id=544 data-nosnippet>544</a></span><span class="kw">pub enum </span>InlayTooltip {
<a href=#545 id=545 data-nosnippet>545</a> String(String),
<a href=#546 id=546 data-nosnippet>546</a> Markdown(String),
<a href=#547 id=547 data-nosnippet>547</a>}
<a href=#548 id=548 data-nosnippet>548</a>
<a href=#549 id=549 data-nosnippet>549</a><span class="attr">#[derive(Default, Hash, UpmapFromRaFixture)]
<a href=#550 id=550 data-nosnippet>550</a></span><span class="kw">pub struct </span>InlayHintLabel {
<a href=#551 id=551 data-nosnippet>551</a> <span class="kw">pub </span>parts: SmallVec&lt;[InlayHintLabelPart; <span class="number">1</span>]&gt;,
<a href=#552 id=552 data-nosnippet>552</a>}
<a href=#553 id=553 data-nosnippet>553</a>
<a href=#554 id=554 data-nosnippet>554</a><span class="kw">impl </span>InlayHintLabel {
<a href=#555 id=555 data-nosnippet>555</a> <span class="kw">pub fn </span>simple(
<a href=#556 id=556 data-nosnippet>556</a> s: <span class="kw">impl </span>Into&lt;String&gt;,
<a href=#557 id=557 data-nosnippet>557</a> tooltip: <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;InlayTooltip&gt;&gt;,
<a href=#558 id=558 data-nosnippet>558</a> linked_location: <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;FileRange&gt;&gt;,
<a href=#559 id=559 data-nosnippet>559</a> ) -&gt; InlayHintLabel {
<a href=#560 id=560 data-nosnippet>560</a> InlayHintLabel {
<a href=#561 id=561 data-nosnippet>561</a> parts: <span class="macro">smallvec!</span>[InlayHintLabelPart { text: s.into(), linked_location, tooltip }],
<a href=#562 id=562 data-nosnippet>562</a> }
<a href=#563 id=563 data-nosnippet>563</a> }
<a href=#564 id=564 data-nosnippet>564</a>
<a href=#565 id=565 data-nosnippet>565</a> <span class="kw">pub fn </span>prepend_str(<span class="kw-2">&amp;mut </span><span class="self">self</span>, s: <span class="kw-2">&amp;</span>str) {
<a href=#566 id=566 data-nosnippet>566</a> <span class="kw">match </span><span class="kw-2">&amp;mut *</span><span class="self">self</span>.parts {
<a href=#567 id=567 data-nosnippet>567</a> [InlayHintLabelPart { text, linked_location: <span class="prelude-val">None</span>, tooltip: <span class="prelude-val">None </span>}, ..] =&gt; {
<a href=#568 id=568 data-nosnippet>568</a> text.insert_str(<span class="number">0</span>, s)
<a href=#569 id=569 data-nosnippet>569</a> }
<a href=#570 id=570 data-nosnippet>570</a> <span class="kw">_ </span>=&gt; <span class="self">self</span>.parts.insert(
<a href=#571 id=571 data-nosnippet>571</a> <span class="number">0</span>,
<a href=#572 id=572 data-nosnippet>572</a> InlayHintLabelPart { text: s.into(), linked_location: <span class="prelude-val">None</span>, tooltip: <span class="prelude-val">None </span>},
<a href=#573 id=573 data-nosnippet>573</a> ),
<a href=#574 id=574 data-nosnippet>574</a> }
<a href=#575 id=575 data-nosnippet>575</a> }
<a href=#576 id=576 data-nosnippet>576</a>
<a href=#577 id=577 data-nosnippet>577</a> <span class="kw">pub fn </span>append_str(<span class="kw-2">&amp;mut </span><span class="self">self</span>, s: <span class="kw-2">&amp;</span>str) {
<a href=#578 id=578 data-nosnippet>578</a> <span class="kw">match </span><span class="kw-2">&amp;mut *</span><span class="self">self</span>.parts {
<a href=#579 id=579 data-nosnippet>579</a> [.., InlayHintLabelPart { text, linked_location: <span class="prelude-val">None</span>, tooltip: <span class="prelude-val">None </span>}] =&gt; {
<a href=#580 id=580 data-nosnippet>580</a> text.push_str(s)
<a href=#581 id=581 data-nosnippet>581</a> }
<a href=#582 id=582 data-nosnippet>582</a> <span class="kw">_ </span>=&gt; <span class="self">self</span>.parts.push(InlayHintLabelPart {
<a href=#583 id=583 data-nosnippet>583</a> text: s.into(),
<a href=#584 id=584 data-nosnippet>584</a> linked_location: <span class="prelude-val">None</span>,
<a href=#585 id=585 data-nosnippet>585</a> tooltip: <span class="prelude-val">None</span>,
<a href=#586 id=586 data-nosnippet>586</a> }),
<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> <span class="kw">pub fn </span>append_part(<span class="kw-2">&amp;mut </span><span class="self">self</span>, part: InlayHintLabelPart) {
<a href=#591 id=591 data-nosnippet>591</a> <span class="kw">if </span>part.linked_location.is_none()
<a href=#592 id=592 data-nosnippet>592</a> &amp;&amp; part.tooltip.is_none()
<a href=#593 id=593 data-nosnippet>593</a> &amp;&amp; <span class="kw">let </span><span class="prelude-val">Some</span>(InlayHintLabelPart { text, linked_location: <span class="prelude-val">None</span>, tooltip: <span class="prelude-val">None </span>}) =
<a href=#594 id=594 data-nosnippet>594</a> <span class="self">self</span>.parts.last_mut()
<a href=#595 id=595 data-nosnippet>595</a> {
<a href=#596 id=596 data-nosnippet>596</a> text.push_str(<span class="kw-2">&amp;</span>part.text);
<a href=#597 id=597 data-nosnippet>597</a> <span class="kw">return</span>;
<a href=#598 id=598 data-nosnippet>598</a> }
<a href=#599 id=599 data-nosnippet>599</a> <span class="self">self</span>.parts.push(part);
<a href=#600 id=600 data-nosnippet>600</a> }
<a href=#601 id=601 data-nosnippet>601</a>}
<a href=#602 id=602 data-nosnippet>602</a>
<a href=#603 id=603 data-nosnippet>603</a><span class="kw">impl </span>From&lt;String&gt; <span class="kw">for </span>InlayHintLabel {
<a href=#604 id=604 data-nosnippet>604</a> <span class="kw">fn </span>from(s: String) -&gt; <span class="self">Self </span>{
<a href=#605 id=605 data-nosnippet>605</a> <span class="self">Self </span>{
<a href=#606 id=606 data-nosnippet>606</a> parts: <span class="macro">smallvec!</span>[InlayHintLabelPart { text: s, linked_location: <span class="prelude-val">None</span>, tooltip: <span class="prelude-val">None </span>}],
<a href=#607 id=607 data-nosnippet>607</a> }
<a href=#608 id=608 data-nosnippet>608</a> }
<a href=#609 id=609 data-nosnippet>609</a>}
<a href=#610 id=610 data-nosnippet>610</a>
<a href=#611 id=611 data-nosnippet>611</a><span class="kw">impl </span>From&lt;<span class="kw-2">&amp;</span>str&gt; <span class="kw">for </span>InlayHintLabel {
<a href=#612 id=612 data-nosnippet>612</a> <span class="kw">fn </span>from(s: <span class="kw-2">&amp;</span>str) -&gt; <span class="self">Self </span>{
<a href=#613 id=613 data-nosnippet>613</a> <span class="self">Self </span>{
<a href=#614 id=614 data-nosnippet>614</a> parts: <span class="macro">smallvec!</span>[InlayHintLabelPart {
<a href=#615 id=615 data-nosnippet>615</a> text: s.into(),
<a href=#616 id=616 data-nosnippet>616</a> linked_location: <span class="prelude-val">None</span>,
<a href=#617 id=617 data-nosnippet>617</a> tooltip: <span class="prelude-val">None
<a href=#618 id=618 data-nosnippet>618</a> </span>}],
<a href=#619 id=619 data-nosnippet>619</a> }
<a href=#620 id=620 data-nosnippet>620</a> }
<a href=#621 id=621 data-nosnippet>621</a>}
<a href=#622 id=622 data-nosnippet>622</a>
<a href=#623 id=623 data-nosnippet>623</a><span class="kw">impl </span>fmt::Display <span class="kw">for </span>InlayHintLabel {
<a href=#624 id=624 data-nosnippet>624</a> <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">'_</span>&gt;) -&gt; fmt::Result {
<a href=#625 id=625 data-nosnippet>625</a> <span class="macro">write!</span>(f, <span class="string">"{}"</span>, <span class="self">self</span>.parts.iter().map(|part| <span class="kw-2">&amp;</span>part.text).format(<span class="string">""</span>))
<a href=#626 id=626 data-nosnippet>626</a> }
<a href=#627 id=627 data-nosnippet>627</a>}
<a href=#628 id=628 data-nosnippet>628</a>
<a href=#629 id=629 data-nosnippet>629</a><span class="kw">impl </span>fmt::Debug <span class="kw">for </span>InlayHintLabel {
<a href=#630 id=630 data-nosnippet>630</a> <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">'_</span>&gt;) -&gt; fmt::Result {
<a href=#631 id=631 data-nosnippet>631</a> f.debug_list().entries(<span class="kw-2">&amp;</span><span class="self">self</span>.parts).finish()
<a href=#632 id=632 data-nosnippet>632</a> }
<a href=#633 id=633 data-nosnippet>633</a>}
<a href=#634 id=634 data-nosnippet>634</a>
<a href=#635 id=635 data-nosnippet>635</a><span class="attr">#[derive(UpmapFromRaFixture)]
<a href=#636 id=636 data-nosnippet>636</a></span><span class="kw">pub struct </span>InlayHintLabelPart {
<a href=#637 id=637 data-nosnippet>637</a> <span class="kw">pub </span>text: String,
<a href=#638 id=638 data-nosnippet>638</a> <span class="doccomment">/// Source location represented by this label part. The client will use this to fetch the part's
<a href=#639 id=639 data-nosnippet>639</a> /// hover tooltip, and Ctrl+Clicking the label part will navigate to the definition the location
<a href=#640 id=640 data-nosnippet>640</a> /// refers to (not necessarily the location itself).
<a href=#641 id=641 data-nosnippet>641</a> /// When setting this, no tooltip must be set on the containing hint, or VS Code will display
<a href=#642 id=642 data-nosnippet>642</a> /// them both.
<a href=#643 id=643 data-nosnippet>643</a> </span><span class="kw">pub </span>linked_location: <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;FileRange&gt;&gt;,
<a href=#644 id=644 data-nosnippet>644</a> <span class="doccomment">/// The tooltip to show when hovering over the inlay hint, this may invoke other actions like
<a href=#645 id=645 data-nosnippet>645</a> /// hover requests to show.
<a href=#646 id=646 data-nosnippet>646</a> </span><span class="kw">pub </span>tooltip: <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;InlayTooltip&gt;&gt;,
<a href=#647 id=647 data-nosnippet>647</a>}
<a href=#648 id=648 data-nosnippet>648</a>
<a href=#649 id=649 data-nosnippet>649</a><span class="kw">impl </span>std::hash::Hash <span class="kw">for </span>InlayHintLabelPart {
<a href=#650 id=650 data-nosnippet>650</a> <span class="kw">fn </span>hash&lt;H: std::hash::Hasher&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>, state: <span class="kw-2">&amp;mut </span>H) {
<a href=#651 id=651 data-nosnippet>651</a> <span class="self">self</span>.text.hash(state);
<a href=#652 id=652 data-nosnippet>652</a> <span class="self">self</span>.linked_location.is_some().hash(state);
<a href=#653 id=653 data-nosnippet>653</a> <span class="self">self</span>.tooltip.is_some().hash(state);
<a href=#654 id=654 data-nosnippet>654</a> }
<a href=#655 id=655 data-nosnippet>655</a>}
<a href=#656 id=656 data-nosnippet>656</a>
<a href=#657 id=657 data-nosnippet>657</a><span class="kw">impl </span>fmt::Debug <span class="kw">for </span>InlayHintLabelPart {
<a href=#658 id=658 data-nosnippet>658</a> <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">'_</span>&gt;) -&gt; fmt::Result {
<a href=#659 id=659 data-nosnippet>659</a> <span class="kw">match </span><span class="self">self </span>{
<a href=#660 id=660 data-nosnippet>660</a> <span class="self">Self </span>{ text, linked_location: <span class="prelude-val">None</span>, tooltip: <span class="prelude-val">None </span>| <span class="prelude-val">Some</span>(LazyProperty::Lazy) } =&gt; {
<a href=#661 id=661 data-nosnippet>661</a> text.fmt(f)
<a href=#662 id=662 data-nosnippet>662</a> }
<a href=#663 id=663 data-nosnippet>663</a> <span class="self">Self </span>{ text, linked_location, tooltip } =&gt; f
<a href=#664 id=664 data-nosnippet>664</a> .debug_struct(<span class="string">"InlayHintLabelPart"</span>)
<a href=#665 id=665 data-nosnippet>665</a> .field(<span class="string">"text"</span>, text)
<a href=#666 id=666 data-nosnippet>666</a> .field(<span class="string">"linked_location"</span>, linked_location)
<a href=#667 id=667 data-nosnippet>667</a> .field(
<a href=#668 id=668 data-nosnippet>668</a> <span class="string">"tooltip"</span>,
<a href=#669 id=669 data-nosnippet>669</a> <span class="kw-2">&amp;</span>tooltip.as_ref().map_or(<span class="string">""</span>, |it| <span class="kw">match </span>it {
<a href=#670 id=670 data-nosnippet>670</a> LazyProperty::Computed(
<a href=#671 id=671 data-nosnippet>671</a> InlayTooltip::String(it) | InlayTooltip::Markdown(it),
<a href=#672 id=672 data-nosnippet>672</a> ) =&gt; it,
<a href=#673 id=673 data-nosnippet>673</a> LazyProperty::Lazy =&gt; <span class="string">""</span>,
<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> .finish(),
<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>
<a href=#681 id=681 data-nosnippet>681</a><span class="attr">#[derive(Debug)]
<a href=#682 id=682 data-nosnippet>682</a></span><span class="kw">struct </span>InlayHintLabelBuilder&lt;<span class="lifetime">'a</span>&gt; {
<a href=#683 id=683 data-nosnippet>683</a> sema: <span class="kw-2">&amp;</span><span class="lifetime">'a </span>Semantics&lt;<span class="lifetime">'a</span>, RootDatabase&gt;,
<a href=#684 id=684 data-nosnippet>684</a> result: InlayHintLabel,
<a href=#685 id=685 data-nosnippet>685</a> last_part: String,
<a href=#686 id=686 data-nosnippet>686</a> resolve: bool,
<a href=#687 id=687 data-nosnippet>687</a> location: <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;FileRange&gt;&gt;,
<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">impl </span>fmt::Write <span class="kw">for </span>InlayHintLabelBuilder&lt;<span class="lifetime">'_</span>&gt; {
<a href=#691 id=691 data-nosnippet>691</a> <span class="kw">fn </span>write_str(<span class="kw-2">&amp;mut </span><span class="self">self</span>, s: <span class="kw-2">&amp;</span>str) -&gt; fmt::Result {
<a href=#692 id=692 data-nosnippet>692</a> <span class="self">self</span>.last_part.write_str(s)
<a href=#693 id=693 data-nosnippet>693</a> }
<a href=#694 id=694 data-nosnippet>694</a>}
<a href=#695 id=695 data-nosnippet>695</a>
<a href=#696 id=696 data-nosnippet>696</a><span class="kw">impl </span>HirWrite <span class="kw">for </span>InlayHintLabelBuilder&lt;<span class="lifetime">'_</span>&gt; {
<a href=#697 id=697 data-nosnippet>697</a> <span class="kw">fn </span>start_location_link(<span class="kw-2">&amp;mut </span><span class="self">self</span>, def: ModuleDefId) {
<a href=#698 id=698 data-nosnippet>698</a> <span class="macro">never!</span>(<span class="self">self</span>.location.is_some(), <span class="string">"location link is already started"</span>);
<a href=#699 id=699 data-nosnippet>699</a> <span class="self">self</span>.make_new_part();
<a href=#700 id=700 data-nosnippet>700</a>
<a href=#701 id=701 data-nosnippet>701</a> <span class="self">self</span>.location = <span class="prelude-val">Some</span>(<span class="kw">if </span><span class="self">self</span>.resolve {
<a href=#702 id=702 data-nosnippet>702</a> LazyProperty::Lazy
<a href=#703 id=703 data-nosnippet>703</a> } <span class="kw">else </span>{
<a href=#704 id=704 data-nosnippet>704</a> LazyProperty::Computed({
<a href=#705 id=705 data-nosnippet>705</a> <span class="kw">let </span><span class="prelude-val">Some</span>(location) = ModuleDef::from(def).try_to_nav(<span class="self">self</span>.sema) <span class="kw">else </span>{ <span class="kw">return </span>};
<a href=#706 id=706 data-nosnippet>706</a> <span class="kw">let </span>location = location.call_site();
<a href=#707 id=707 data-nosnippet>707</a> FileRange { file_id: location.file_id, range: location.focus_or_full_range() }
<a href=#708 id=708 data-nosnippet>708</a> })
<a href=#709 id=709 data-nosnippet>709</a> });
<a href=#710 id=710 data-nosnippet>710</a> }
<a href=#711 id=711 data-nosnippet>711</a>
<a href=#712 id=712 data-nosnippet>712</a> <span class="kw">fn </span>start_location_link_generic(<span class="kw-2">&amp;mut </span><span class="self">self</span>, def: GenericParamId) {
<a href=#713 id=713 data-nosnippet>713</a> <span class="macro">never!</span>(<span class="self">self</span>.location.is_some(), <span class="string">"location link is already started"</span>);
<a href=#714 id=714 data-nosnippet>714</a> <span class="self">self</span>.make_new_part();
<a href=#715 id=715 data-nosnippet>715</a>
<a href=#716 id=716 data-nosnippet>716</a> <span class="self">self</span>.location = <span class="prelude-val">Some</span>(<span class="kw">if </span><span class="self">self</span>.resolve {
<a href=#717 id=717 data-nosnippet>717</a> LazyProperty::Lazy
<a href=#718 id=718 data-nosnippet>718</a> } <span class="kw">else </span>{
<a href=#719 id=719 data-nosnippet>719</a> LazyProperty::Computed({
<a href=#720 id=720 data-nosnippet>720</a> <span class="kw">let </span><span class="prelude-val">Some</span>(location) = GenericParam::from(def).try_to_nav(<span class="self">self</span>.sema) <span class="kw">else </span>{ <span class="kw">return </span>};
<a href=#721 id=721 data-nosnippet>721</a> <span class="kw">let </span>location = location.call_site();
<a href=#722 id=722 data-nosnippet>722</a> FileRange { file_id: location.file_id, range: location.focus_or_full_range() }
<a href=#723 id=723 data-nosnippet>723</a> })
<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>
<a href=#727 id=727 data-nosnippet>727</a> <span class="kw">fn </span>end_location_link(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
<a href=#728 id=728 data-nosnippet>728</a> <span class="self">self</span>.make_new_part();
<a href=#729 id=729 data-nosnippet>729</a> }
<a href=#730 id=730 data-nosnippet>730</a>}
<a href=#731 id=731 data-nosnippet>731</a>
<a href=#732 id=732 data-nosnippet>732</a><span class="kw">impl </span>InlayHintLabelBuilder&lt;<span class="lifetime">'_</span>&gt; {
<a href=#733 id=733 data-nosnippet>733</a> <span class="kw">fn </span>make_new_part(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
<a href=#734 id=734 data-nosnippet>734</a> <span class="kw">let </span>text = take(<span class="kw-2">&amp;mut </span><span class="self">self</span>.last_part);
<a href=#735 id=735 data-nosnippet>735</a> <span class="kw">if </span>!text.is_empty() {
<a href=#736 id=736 data-nosnippet>736</a> <span class="self">self</span>.result.parts.push(InlayHintLabelPart {
<a href=#737 id=737 data-nosnippet>737</a> text,
<a href=#738 id=738 data-nosnippet>738</a> linked_location: <span class="self">self</span>.location.take(),
<a href=#739 id=739 data-nosnippet>739</a> tooltip: <span class="prelude-val">None</span>,
<a href=#740 id=740 data-nosnippet>740</a> });
<a href=#741 id=741 data-nosnippet>741</a> }
<a href=#742 id=742 data-nosnippet>742</a> }
<a href=#743 id=743 data-nosnippet>743</a>
<a href=#744 id=744 data-nosnippet>744</a> <span class="kw">fn </span>finish(<span class="kw-2">mut </span><span class="self">self</span>) -&gt; InlayHintLabel {
<a href=#745 id=745 data-nosnippet>745</a> <span class="self">self</span>.make_new_part();
<a href=#746 id=746 data-nosnippet>746</a> <span class="self">self</span>.result
<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>
<a href=#750 id=750 data-nosnippet>750</a><span class="kw">fn </span>label_of_ty(
<a href=#751 id=751 data-nosnippet>751</a> famous_defs @ FamousDefs(sema, <span class="kw">_</span>): <span class="kw-2">&amp;</span>FamousDefs&lt;<span class="lifetime">'_</span>, <span class="lifetime">'_</span>&gt;,
<a href=#752 id=752 data-nosnippet>752</a> config: <span class="kw-2">&amp;</span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#753 id=753 data-nosnippet>753</a> ty: <span class="kw-2">&amp;</span>hir::Type&lt;<span class="lifetime">'_</span>&gt;,
<a href=#754 id=754 data-nosnippet>754</a> display_target: DisplayTarget,
<a href=#755 id=755 data-nosnippet>755</a>) -&gt; <span class="prelude-ty">Option</span>&lt;InlayHintLabel&gt; {
<a href=#756 id=756 data-nosnippet>756</a> <span class="kw">fn </span>rec(
<a href=#757 id=757 data-nosnippet>757</a> sema: <span class="kw-2">&amp;</span>Semantics&lt;<span class="lifetime">'_</span>, RootDatabase&gt;,
<a href=#758 id=758 data-nosnippet>758</a> famous_defs: <span class="kw-2">&amp;</span>FamousDefs&lt;<span class="lifetime">'_</span>, <span class="lifetime">'_</span>&gt;,
<a href=#759 id=759 data-nosnippet>759</a> <span class="kw-2">mut </span>max_length: <span class="prelude-ty">Option</span>&lt;usize&gt;,
<a href=#760 id=760 data-nosnippet>760</a> ty: <span class="kw-2">&amp;</span>hir::Type&lt;<span class="lifetime">'_</span>&gt;,
<a href=#761 id=761 data-nosnippet>761</a> label_builder: <span class="kw-2">&amp;mut </span>InlayHintLabelBuilder&lt;<span class="lifetime">'_</span>&gt;,
<a href=#762 id=762 data-nosnippet>762</a> config: <span class="kw-2">&amp;</span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#763 id=763 data-nosnippet>763</a> display_target: DisplayTarget,
<a href=#764 id=764 data-nosnippet>764</a> ) -&gt; <span class="prelude-ty">Result</span>&lt;(), HirDisplayError&gt; {
<a href=#765 id=765 data-nosnippet>765</a> <span class="kw">let </span>iter_item_type = hint_iterator(sema, famous_defs, ty);
<a href=#766 id=766 data-nosnippet>766</a> <span class="kw">match </span>iter_item_type {
<a href=#767 id=767 data-nosnippet>767</a> <span class="prelude-val">Some</span>((iter_trait, item, ty)) =&gt; {
<a href=#768 id=768 data-nosnippet>768</a> <span class="kw">const </span>LABEL_START: <span class="kw-2">&amp;</span>str = <span class="string">"impl "</span>;
<a href=#769 id=769 data-nosnippet>769</a> <span class="kw">const </span>LABEL_ITERATOR: <span class="kw-2">&amp;</span>str = <span class="string">"Iterator"</span>;
<a href=#770 id=770 data-nosnippet>770</a> <span class="kw">const </span>LABEL_MIDDLE: <span class="kw-2">&amp;</span>str = <span class="string">"&lt;"</span>;
<a href=#771 id=771 data-nosnippet>771</a> <span class="kw">const </span>LABEL_ITEM: <span class="kw-2">&amp;</span>str = <span class="string">"Item"</span>;
<a href=#772 id=772 data-nosnippet>772</a> <span class="kw">const </span>LABEL_MIDDLE2: <span class="kw-2">&amp;</span>str = <span class="string">" = "</span>;
<a href=#773 id=773 data-nosnippet>773</a> <span class="kw">const </span>LABEL_END: <span class="kw-2">&amp;</span>str = <span class="string">"&gt;"</span>;
<a href=#774 id=774 data-nosnippet>774</a>
<a href=#775 id=775 data-nosnippet>775</a> max_length = max_length.map(|len| {
<a href=#776 id=776 data-nosnippet>776</a> len.saturating_sub(
<a href=#777 id=777 data-nosnippet>777</a> LABEL_START.len()
<a href=#778 id=778 data-nosnippet>778</a> + LABEL_ITERATOR.len()
<a href=#779 id=779 data-nosnippet>779</a> + LABEL_MIDDLE.len()
<a href=#780 id=780 data-nosnippet>780</a> + LABEL_MIDDLE2.len()
<a href=#781 id=781 data-nosnippet>781</a> + LABEL_END.len(),
<a href=#782 id=782 data-nosnippet>782</a> )
<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> <span class="kw">let </span>module_def_location = |label_builder: <span class="kw-2">&amp;mut </span>InlayHintLabelBuilder&lt;<span class="lifetime">'_</span>&gt;,
<a href=#786 id=786 data-nosnippet>786</a> def: ModuleDef,
<a href=#787 id=787 data-nosnippet>787</a> name| {
<a href=#788 id=788 data-nosnippet>788</a> <span class="kw">let </span>def = def.try_into();
<a href=#789 id=789 data-nosnippet>789</a> <span class="kw">if let </span><span class="prelude-val">Ok</span>(def) = def {
<a href=#790 id=790 data-nosnippet>790</a> label_builder.start_location_link(def);
<a href=#791 id=791 data-nosnippet>791</a> }
<a href=#792 id=792 data-nosnippet>792</a> <span class="attr">#[expect(
<a href=#793 id=793 data-nosnippet>793</a> clippy::question_mark,
<a href=#794 id=794 data-nosnippet>794</a> reason = <span class="string">"false positive; replacing with `?` leads to 'type annotations needed' error"
<a href=#795 id=795 data-nosnippet>795</a> </span>)]
<a href=#796 id=796 data-nosnippet>796</a> </span><span class="kw">if let </span><span class="prelude-val">Err</span>(err) = label_builder.write_str(name) {
<a href=#797 id=797 data-nosnippet>797</a> <span class="kw">return </span><span class="prelude-val">Err</span>(err);
<a href=#798 id=798 data-nosnippet>798</a> }
<a href=#799 id=799 data-nosnippet>799</a> <span class="kw">if </span>def.is_ok() {
<a href=#800 id=800 data-nosnippet>800</a> label_builder.end_location_link();
<a href=#801 id=801 data-nosnippet>801</a> }
<a href=#802 id=802 data-nosnippet>802</a> <span class="prelude-val">Ok</span>(())
<a href=#803 id=803 data-nosnippet>803</a> };
<a href=#804 id=804 data-nosnippet>804</a>
<a href=#805 id=805 data-nosnippet>805</a> label_builder.write_str(LABEL_START)<span class="question-mark">?</span>;
<a href=#806 id=806 data-nosnippet>806</a> module_def_location(label_builder, ModuleDef::from(iter_trait), LABEL_ITERATOR)<span class="question-mark">?</span>;
<a href=#807 id=807 data-nosnippet>807</a> label_builder.write_str(LABEL_MIDDLE)<span class="question-mark">?</span>;
<a href=#808 id=808 data-nosnippet>808</a> module_def_location(label_builder, ModuleDef::from(item), LABEL_ITEM)<span class="question-mark">?</span>;
<a href=#809 id=809 data-nosnippet>809</a> label_builder.write_str(LABEL_MIDDLE2)<span class="question-mark">?</span>;
<a href=#810 id=810 data-nosnippet>810</a> rec(sema, famous_defs, max_length, <span class="kw-2">&amp;</span>ty, label_builder, config, display_target)<span class="question-mark">?</span>;
<a href=#811 id=811 data-nosnippet>811</a> label_builder.write_str(LABEL_END)<span class="question-mark">?</span>;
<a href=#812 id=812 data-nosnippet>812</a> <span class="prelude-val">Ok</span>(())
<a href=#813 id=813 data-nosnippet>813</a> }
<a href=#814 id=814 data-nosnippet>814</a> <span class="prelude-val">None </span>=&gt; ty
<a href=#815 id=815 data-nosnippet>815</a> .display_truncated(sema.db, max_length, display_target)
<a href=#816 id=816 data-nosnippet>816</a> .with_closure_style(config.closure_style)
<a href=#817 id=817 data-nosnippet>817</a> .write_to(label_builder),
<a href=#818 id=818 data-nosnippet>818</a> }
<a href=#819 id=819 data-nosnippet>819</a> }
<a href=#820 id=820 data-nosnippet>820</a>
<a href=#821 id=821 data-nosnippet>821</a> <span class="kw">let </span><span class="kw-2">mut </span>label_builder = InlayHintLabelBuilder {
<a href=#822 id=822 data-nosnippet>822</a> sema,
<a href=#823 id=823 data-nosnippet>823</a> last_part: String::new(),
<a href=#824 id=824 data-nosnippet>824</a> location: <span class="prelude-val">None</span>,
<a href=#825 id=825 data-nosnippet>825</a> result: InlayHintLabel::default(),
<a href=#826 id=826 data-nosnippet>826</a> resolve: config.fields_to_resolve.resolve_label_location,
<a href=#827 id=827 data-nosnippet>827</a> };
<a href=#828 id=828 data-nosnippet>828</a> <span class="kw">let _ </span>=
<a href=#829 id=829 data-nosnippet>829</a> rec(sema, famous_defs, config.max_length, ty, <span class="kw-2">&amp;mut </span>label_builder, config, display_target);
<a href=#830 id=830 data-nosnippet>830</a> <span class="kw">let </span>r = label_builder.finish();
<a href=#831 id=831 data-nosnippet>831</a> <span class="prelude-val">Some</span>(r)
<a href=#832 id=832 data-nosnippet>832</a>}
<a href=#833 id=833 data-nosnippet>833</a>
<a href=#834 id=834 data-nosnippet>834</a><span class="doccomment">/// Checks if the type is an Iterator from std::iter and returns the iterator trait and the item type of the concrete iterator.
<a href=#835 id=835 data-nosnippet>835</a></span><span class="kw">fn </span>hint_iterator&lt;<span class="lifetime">'db</span>&gt;(
<a href=#836 id=836 data-nosnippet>836</a> sema: <span class="kw-2">&amp;</span>Semantics&lt;<span class="lifetime">'db</span>, RootDatabase&gt;,
<a href=#837 id=837 data-nosnippet>837</a> famous_defs: <span class="kw-2">&amp;</span>FamousDefs&lt;<span class="lifetime">'_</span>, <span class="lifetime">'db</span>&gt;,
<a href=#838 id=838 data-nosnippet>838</a> ty: <span class="kw-2">&amp;</span>hir::Type&lt;<span class="lifetime">'db</span>&gt;,
<a href=#839 id=839 data-nosnippet>839</a>) -&gt; <span class="prelude-ty">Option</span>&lt;(hir::Trait, hir::TypeAlias, hir::Type&lt;<span class="lifetime">'db</span>&gt;)&gt; {
<a href=#840 id=840 data-nosnippet>840</a> <span class="kw">let </span>db = sema.db;
<a href=#841 id=841 data-nosnippet>841</a> <span class="kw">let </span>strukt = ty.strip_references().as_adt()<span class="question-mark">?</span>;
<a href=#842 id=842 data-nosnippet>842</a> <span class="kw">let </span>krate = strukt.module(db).krate(db);
<a href=#843 id=843 data-nosnippet>843</a> <span class="kw">if </span><span class="macro">krate !</span>= famous_defs.core()<span class="question-mark">? </span>{
<a href=#844 id=844 data-nosnippet>844</a> <span class="kw">return </span><span class="prelude-val">None</span>;
<a href=#845 id=845 data-nosnippet>845</a> }
<a href=#846 id=846 data-nosnippet>846</a> <span class="kw">let </span>iter_trait = famous_defs.core_iter_Iterator()<span class="question-mark">?</span>;
<a href=#847 id=847 data-nosnippet>847</a> <span class="kw">let </span>iter_mod = famous_defs.core_iter()<span class="question-mark">?</span>;
<a href=#848 id=848 data-nosnippet>848</a>
<a href=#849 id=849 data-nosnippet>849</a> <span class="comment">// Assert that this struct comes from `core::iter`.
<a href=#850 id=850 data-nosnippet>850</a> </span><span class="kw">if </span>!(strukt.visibility(db) == hir::Visibility::Public
<a href=#851 id=851 data-nosnippet>851</a> &amp;&amp; strukt.module(db).path_to_root(db).contains(<span class="kw-2">&amp;</span>iter_mod))
<a href=#852 id=852 data-nosnippet>852</a> {
<a href=#853 id=853 data-nosnippet>853</a> <span class="kw">return </span><span class="prelude-val">None</span>;
<a href=#854 id=854 data-nosnippet>854</a> }
<a href=#855 id=855 data-nosnippet>855</a>
<a href=#856 id=856 data-nosnippet>856</a> <span class="kw">if </span>ty.impls_trait(db, iter_trait, <span class="kw-2">&amp;</span>[]) {
<a href=#857 id=857 data-nosnippet>857</a> <span class="kw">let </span>assoc_type_item = iter_trait.items(db).into_iter().find_map(|item| <span class="kw">match </span>item {
<a href=#858 id=858 data-nosnippet>858</a> hir::AssocItem::TypeAlias(alias) <span class="kw">if </span>alias.name(db) == sym::Item =&gt; <span class="prelude-val">Some</span>(alias),
<a href=#859 id=859 data-nosnippet>859</a> <span class="kw">_ </span>=&gt; <span class="prelude-val">None</span>,
<a href=#860 id=860 data-nosnippet>860</a> })<span class="question-mark">?</span>;
<a href=#861 id=861 data-nosnippet>861</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(ty) = ty.normalize_trait_assoc_type(db, <span class="kw-2">&amp;</span>[], assoc_type_item) {
<a href=#862 id=862 data-nosnippet>862</a> <span class="kw">return </span><span class="prelude-val">Some</span>((iter_trait, assoc_type_item, ty));
<a href=#863 id=863 data-nosnippet>863</a> }
<a href=#864 id=864 data-nosnippet>864</a> }
<a href=#865 id=865 data-nosnippet>865</a>
<a href=#866 id=866 data-nosnippet>866</a> <span class="prelude-val">None
<a href=#867 id=867 data-nosnippet>867</a></span>}
<a href=#868 id=868 data-nosnippet>868</a>
<a href=#869 id=869 data-nosnippet>869</a><span class="kw">fn </span>ty_to_text_edit(
<a href=#870 id=870 data-nosnippet>870</a> sema: <span class="kw-2">&amp;</span>Semantics&lt;<span class="lifetime">'_</span>, RootDatabase&gt;,
<a href=#871 id=871 data-nosnippet>871</a> config: <span class="kw-2">&amp;</span>InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#872 id=872 data-nosnippet>872</a> node_for_hint: <span class="kw-2">&amp;</span>SyntaxNode,
<a href=#873 id=873 data-nosnippet>873</a> ty: <span class="kw-2">&amp;</span>hir::Type&lt;<span class="lifetime">'_</span>&gt;,
<a href=#874 id=874 data-nosnippet>874</a> offset_to_insert_ty: TextSize,
<a href=#875 id=875 data-nosnippet>875</a> additional_edits: <span class="kw-2">&amp;</span><span class="kw">dyn </span>Fn(<span class="kw-2">&amp;mut </span>TextEditBuilder),
<a href=#876 id=876 data-nosnippet>876</a> prefix: <span class="kw">impl </span>Into&lt;String&gt;,
<a href=#877 id=877 data-nosnippet>877</a>) -&gt; <span class="prelude-ty">Option</span>&lt;LazyProperty&lt;TextEdit&gt;&gt; {
<a href=#878 id=878 data-nosnippet>878</a> <span class="comment">// FIXME: Limit the length and bail out on excess somehow?
<a href=#879 id=879 data-nosnippet>879</a> </span><span class="kw">let </span>rendered = sema
<a href=#880 id=880 data-nosnippet>880</a> .scope(node_for_hint)
<a href=#881 id=881 data-nosnippet>881</a> .and_then(|scope| ty.display_source_code(scope.db, scope.module().into(), <span class="bool-val">false</span>).ok())<span class="question-mark">?</span>;
<a href=#882 id=882 data-nosnippet>882</a> <span class="prelude-val">Some</span>(config.lazy_text_edit(|| {
<a href=#883 id=883 data-nosnippet>883</a> <span class="kw">let </span><span class="kw-2">mut </span>builder = TextEdit::builder();
<a href=#884 id=884 data-nosnippet>884</a> builder.insert(offset_to_insert_ty, prefix.into());
<a href=#885 id=885 data-nosnippet>885</a> builder.insert(offset_to_insert_ty, rendered);
<a href=#886 id=886 data-nosnippet>886</a>
<a href=#887 id=887 data-nosnippet>887</a> additional_edits(<span class="kw-2">&amp;mut </span>builder);
<a href=#888 id=888 data-nosnippet>888</a>
<a href=#889 id=889 data-nosnippet>889</a> builder.finish()
<a href=#890 id=890 data-nosnippet>890</a> }))
<a href=#891 id=891 data-nosnippet>891</a>}
<a href=#892 id=892 data-nosnippet>892</a>
<a href=#893 id=893 data-nosnippet>893</a><span class="kw">fn </span>closure_has_block_body(closure: <span class="kw-2">&amp;</span>ast::ClosureExpr) -&gt; bool {
<a href=#894 id=894 data-nosnippet>894</a> <span class="macro">matches!</span>(closure.body(), <span class="prelude-val">Some</span>(ast::Expr::BlockExpr(<span class="kw">_</span>)))
<a href=#895 id=895 data-nosnippet>895</a>}
<a href=#896 id=896 data-nosnippet>896</a>
<a href=#897 id=897 data-nosnippet>897</a><span class="attr">#[cfg(test)]
<a href=#898 id=898 data-nosnippet>898</a></span><span class="kw">mod </span>tests {
<a href=#899 id=899 data-nosnippet>899</a>
<a href=#900 id=900 data-nosnippet>900</a> <span class="kw">use </span>expect_test::Expect;
<a href=#901 id=901 data-nosnippet>901</a> <span class="kw">use </span>hir::ClosureStyle;
<a href=#902 id=902 data-nosnippet>902</a> <span class="kw">use </span>ide_db::MiniCore;
<a href=#903 id=903 data-nosnippet>903</a> <span class="kw">use </span>itertools::Itertools;
<a href=#904 id=904 data-nosnippet>904</a> <span class="kw">use </span>test_utils::extract_annotations;
<a href=#905 id=905 data-nosnippet>905</a>
<a href=#906 id=906 data-nosnippet>906</a> <span class="kw">use </span><span class="kw">crate</span>::DiscriminantHints;
<a href=#907 id=907 data-nosnippet>907</a> <span class="kw">use </span><span class="kw">crate</span>::inlay_hints::{AdjustmentHints, AdjustmentHintsMode};
<a href=#908 id=908 data-nosnippet>908</a> <span class="kw">use </span>crate::{LifetimeElisionHints, fixture, inlay_hints::InlayHintsConfig};
<a href=#909 id=909 data-nosnippet>909</a>
<a href=#910 id=910 data-nosnippet>910</a> <span class="kw">use </span>super::{ClosureReturnTypeHints, GenericParameterHints, InlayFieldsToResolve};
<a href=#911 id=911 data-nosnippet>911</a>
<a href=#912 id=912 data-nosnippet>912</a> <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">const </span>DISABLED_CONFIG: InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt; = InlayHintsConfig {
<a href=#913 id=913 data-nosnippet>913</a> discriminant_hints: DiscriminantHints::Never,
<a href=#914 id=914 data-nosnippet>914</a> render_colons: <span class="bool-val">false</span>,
<a href=#915 id=915 data-nosnippet>915</a> type_hints: <span class="bool-val">false</span>,
<a href=#916 id=916 data-nosnippet>916</a> parameter_hints: <span class="bool-val">false</span>,
<a href=#917 id=917 data-nosnippet>917</a> parameter_hints_for_missing_arguments: <span class="bool-val">false</span>,
<a href=#918 id=918 data-nosnippet>918</a> sized_bound: <span class="bool-val">false</span>,
<a href=#919 id=919 data-nosnippet>919</a> generic_parameter_hints: GenericParameterHints {
<a href=#920 id=920 data-nosnippet>920</a> type_hints: <span class="bool-val">false</span>,
<a href=#921 id=921 data-nosnippet>921</a> lifetime_hints: <span class="bool-val">false</span>,
<a href=#922 id=922 data-nosnippet>922</a> const_hints: <span class="bool-val">false</span>,
<a href=#923 id=923 data-nosnippet>923</a> },
<a href=#924 id=924 data-nosnippet>924</a> chaining_hints: <span class="bool-val">false</span>,
<a href=#925 id=925 data-nosnippet>925</a> lifetime_elision_hints: LifetimeElisionHints::Never,
<a href=#926 id=926 data-nosnippet>926</a> closure_return_type_hints: ClosureReturnTypeHints::Never,
<a href=#927 id=927 data-nosnippet>927</a> closure_capture_hints: <span class="bool-val">false</span>,
<a href=#928 id=928 data-nosnippet>928</a> adjustment_hints: AdjustmentHints::Never,
<a href=#929 id=929 data-nosnippet>929</a> adjustment_hints_disable_reborrows: <span class="bool-val">false</span>,
<a href=#930 id=930 data-nosnippet>930</a> adjustment_hints_mode: AdjustmentHintsMode::Prefix,
<a href=#931 id=931 data-nosnippet>931</a> adjustment_hints_hide_outside_unsafe: <span class="bool-val">false</span>,
<a href=#932 id=932 data-nosnippet>932</a> binding_mode_hints: <span class="bool-val">false</span>,
<a href=#933 id=933 data-nosnippet>933</a> hide_inferred_type_hints: <span class="bool-val">false</span>,
<a href=#934 id=934 data-nosnippet>934</a> hide_named_constructor_hints: <span class="bool-val">false</span>,
<a href=#935 id=935 data-nosnippet>935</a> hide_closure_initialization_hints: <span class="bool-val">false</span>,
<a href=#936 id=936 data-nosnippet>936</a> hide_closure_parameter_hints: <span class="bool-val">false</span>,
<a href=#937 id=937 data-nosnippet>937</a> closure_style: ClosureStyle::ImplFn,
<a href=#938 id=938 data-nosnippet>938</a> param_names_for_lifetime_elision_hints: <span class="bool-val">false</span>,
<a href=#939 id=939 data-nosnippet>939</a> max_length: <span class="prelude-val">None</span>,
<a href=#940 id=940 data-nosnippet>940</a> closing_brace_hints_min_lines: <span class="prelude-val">None</span>,
<a href=#941 id=941 data-nosnippet>941</a> fields_to_resolve: InlayFieldsToResolve::empty(),
<a href=#942 id=942 data-nosnippet>942</a> implicit_drop_hints: <span class="bool-val">false</span>,
<a href=#943 id=943 data-nosnippet>943</a> implied_dyn_trait_hints: <span class="bool-val">false</span>,
<a href=#944 id=944 data-nosnippet>944</a> range_exclusive_hints: <span class="bool-val">false</span>,
<a href=#945 id=945 data-nosnippet>945</a> minicore: MiniCore::default(),
<a href=#946 id=946 data-nosnippet>946</a> };
<a href=#947 id=947 data-nosnippet>947</a> <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">const </span>TEST_CONFIG: InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt; = InlayHintsConfig {
<a href=#948 id=948 data-nosnippet>948</a> type_hints: <span class="bool-val">true</span>,
<a href=#949 id=949 data-nosnippet>949</a> parameter_hints: <span class="bool-val">true</span>,
<a href=#950 id=950 data-nosnippet>950</a> chaining_hints: <span class="bool-val">true</span>,
<a href=#951 id=951 data-nosnippet>951</a> closure_return_type_hints: ClosureReturnTypeHints::WithBlock,
<a href=#952 id=952 data-nosnippet>952</a> binding_mode_hints: <span class="bool-val">true</span>,
<a href=#953 id=953 data-nosnippet>953</a> lifetime_elision_hints: LifetimeElisionHints::Always,
<a href=#954 id=954 data-nosnippet>954</a> ..DISABLED_CONFIG
<a href=#955 id=955 data-nosnippet>955</a> };
<a href=#956 id=956 data-nosnippet>956</a>
<a href=#957 id=957 data-nosnippet>957</a> <span class="attr">#[track_caller]
<a href=#958 id=958 data-nosnippet>958</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>check(<span class="attr">#[rust_analyzer::rust_fixture] </span>ra_fixture: <span class="kw-2">&amp;</span>str) {
<a href=#959 id=959 data-nosnippet>959</a> check_with_config(TEST_CONFIG, ra_fixture);
<a href=#960 id=960 data-nosnippet>960</a> }
<a href=#961 id=961 data-nosnippet>961</a>
<a href=#962 id=962 data-nosnippet>962</a> <span class="attr">#[track_caller]
<a href=#963 id=963 data-nosnippet>963</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>check_with_config(
<a href=#964 id=964 data-nosnippet>964</a> config: InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#965 id=965 data-nosnippet>965</a> <span class="attr">#[rust_analyzer::rust_fixture] </span>ra_fixture: <span class="kw-2">&amp;</span>str,
<a href=#966 id=966 data-nosnippet>966</a> ) {
<a href=#967 id=967 data-nosnippet>967</a> <span class="kw">let </span>(analysis, file_id) = fixture::file(ra_fixture);
<a href=#968 id=968 data-nosnippet>968</a> <span class="kw">let </span><span class="kw-2">mut </span>expected = extract_annotations(<span class="kw-2">&amp;</span>analysis.file_text(file_id).unwrap());
<a href=#969 id=969 data-nosnippet>969</a> <span class="kw">let </span>inlay_hints = analysis.inlay_hints(<span class="kw-2">&amp;</span>config, file_id, <span class="prelude-val">None</span>).unwrap();
<a href=#970 id=970 data-nosnippet>970</a> <span class="kw">let </span>actual = inlay_hints
<a href=#971 id=971 data-nosnippet>971</a> .into_iter()
<a href=#972 id=972 data-nosnippet>972</a> <span class="comment">// FIXME: We trim the start because some inlay produces leading whitespace which is not properly supported by our annotation extraction
<a href=#973 id=973 data-nosnippet>973</a> </span>.map(|it| (it.range, it.label.to_string().trim_start().to_owned()))
<a href=#974 id=974 data-nosnippet>974</a> .sorted_by_key(|(range, <span class="kw">_</span>)| range.start())
<a href=#975 id=975 data-nosnippet>975</a> .collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
<a href=#976 id=976 data-nosnippet>976</a> expected.sort_by_key(|(range, <span class="kw">_</span>)| range.start());
<a href=#977 id=977 data-nosnippet>977</a>
<a href=#978 id=978 data-nosnippet>978</a> <span class="macro">assert_eq!</span>(expected, actual, <span class="string">"\nExpected:\n{expected:#?}\n\nActual:\n{actual:#?}"</span>);
<a href=#979 id=979 data-nosnippet>979</a> }
<a href=#980 id=980 data-nosnippet>980</a>
<a href=#981 id=981 data-nosnippet>981</a> <span class="attr">#[track_caller]
<a href=#982 id=982 data-nosnippet>982</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>check_expect(
<a href=#983 id=983 data-nosnippet>983</a> config: InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#984 id=984 data-nosnippet>984</a> <span class="attr">#[rust_analyzer::rust_fixture] </span>ra_fixture: <span class="kw-2">&amp;</span>str,
<a href=#985 id=985 data-nosnippet>985</a> expect: Expect,
<a href=#986 id=986 data-nosnippet>986</a> ) {
<a href=#987 id=987 data-nosnippet>987</a> <span class="kw">let </span>(analysis, file_id) = fixture::file(ra_fixture);
<a href=#988 id=988 data-nosnippet>988</a> <span class="kw">let </span>inlay_hints = analysis.inlay_hints(<span class="kw-2">&amp;</span>config, file_id, <span class="prelude-val">None</span>).unwrap();
<a href=#989 id=989 data-nosnippet>989</a> <span class="kw">let </span>filtered =
<a href=#990 id=990 data-nosnippet>990</a> inlay_hints.into_iter().map(|hint| (hint.range, hint.label)).collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;();
<a href=#991 id=991 data-nosnippet>991</a> expect.assert_debug_eq(<span class="kw-2">&amp;</span>filtered)
<a href=#992 id=992 data-nosnippet>992</a> }
<a href=#993 id=993 data-nosnippet>993</a>
<a href=#994 id=994 data-nosnippet>994</a> <span class="doccomment">/// Computes inlay hints for the fixture, applies all the provided text edits and then runs
<a href=#995 id=995 data-nosnippet>995</a> /// expect test.
<a href=#996 id=996 data-nosnippet>996</a> </span><span class="attr">#[track_caller]
<a href=#997 id=997 data-nosnippet>997</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>check_edit(
<a href=#998 id=998 data-nosnippet>998</a> config: InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#999 id=999 data-nosnippet>999</a> <span class="attr">#[rust_analyzer::rust_fixture] </span>ra_fixture: <span class="kw-2">&amp;</span>str,
<a href=#1000 id=1000 data-nosnippet>1000</a> expect: Expect,
<a href=#1001 id=1001 data-nosnippet>1001</a> ) {
<a href=#1002 id=1002 data-nosnippet>1002</a> <span class="kw">let </span>(analysis, file_id) = fixture::file(ra_fixture);
<a href=#1003 id=1003 data-nosnippet>1003</a> <span class="kw">let </span>inlay_hints = analysis.inlay_hints(<span class="kw-2">&amp;</span>config, file_id, <span class="prelude-val">None</span>).unwrap();
<a href=#1004 id=1004 data-nosnippet>1004</a>
<a href=#1005 id=1005 data-nosnippet>1005</a> <span class="kw">let </span>edits = inlay_hints
<a href=#1006 id=1006 data-nosnippet>1006</a> .into_iter()
<a href=#1007 id=1007 data-nosnippet>1007</a> .filter_map(|hint| hint.text_edit<span class="question-mark">?</span>.computed())
<a href=#1008 id=1008 data-nosnippet>1008</a> .reduce(|<span class="kw-2">mut </span>acc, next| {
<a href=#1009 id=1009 data-nosnippet>1009</a> acc.union(next).expect(<span class="string">"merging text edits failed"</span>);
<a href=#1010 id=1010 data-nosnippet>1010</a> acc
<a href=#1011 id=1011 data-nosnippet>1011</a> })
<a href=#1012 id=1012 data-nosnippet>1012</a> .expect(<span class="string">"no edit returned"</span>);
<a href=#1013 id=1013 data-nosnippet>1013</a>
<a href=#1014 id=1014 data-nosnippet>1014</a> <span class="kw">let </span><span class="kw-2">mut </span>actual = analysis.file_text(file_id).unwrap().to_string();
<a href=#1015 id=1015 data-nosnippet>1015</a> edits.apply(<span class="kw-2">&amp;mut </span>actual);
<a href=#1016 id=1016 data-nosnippet>1016</a> expect.assert_eq(<span class="kw-2">&amp;</span>actual);
<a href=#1017 id=1017 data-nosnippet>1017</a> }
<a href=#1018 id=1018 data-nosnippet>1018</a>
<a href=#1019 id=1019 data-nosnippet>1019</a> <span class="attr">#[track_caller]
<a href=#1020 id=1020 data-nosnippet>1020</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>check_no_edit(
<a href=#1021 id=1021 data-nosnippet>1021</a> config: InlayHintsConfig&lt;<span class="lifetime">'_</span>&gt;,
<a href=#1022 id=1022 data-nosnippet>1022</a> <span class="attr">#[rust_analyzer::rust_fixture] </span>ra_fixture: <span class="kw-2">&amp;</span>str,
<a href=#1023 id=1023 data-nosnippet>1023</a> ) {
<a href=#1024 id=1024 data-nosnippet>1024</a> <span class="kw">let </span>(analysis, file_id) = fixture::file(ra_fixture);
<a href=#1025 id=1025 data-nosnippet>1025</a> <span class="kw">let </span>inlay_hints = analysis.inlay_hints(<span class="kw-2">&amp;</span>config, file_id, <span class="prelude-val">None</span>).unwrap();
<a href=#1026 id=1026 data-nosnippet>1026</a>
<a href=#1027 id=1027 data-nosnippet>1027</a> <span class="kw">let </span>edits: Vec&lt;<span class="kw">_</span>&gt; =
<a href=#1028 id=1028 data-nosnippet>1028</a> inlay_hints.into_iter().filter_map(|hint| hint.text_edit<span class="question-mark">?</span>.computed()).collect();
<a href=#1029 id=1029 data-nosnippet>1029</a>
<a href=#1030 id=1030 data-nosnippet>1030</a> <span class="macro">assert!</span>(edits.is_empty(), <span class="string">"unexpected edits: {edits:?}"</span>);
<a href=#1031 id=1031 data-nosnippet>1031</a> }
<a href=#1032 id=1032 data-nosnippet>1032</a>
<a href=#1033 id=1033 data-nosnippet>1033</a> <span class="attr">#[test]
<a href=#1034 id=1034 data-nosnippet>1034</a> </span><span class="kw">fn </span>hints_disabled() {
<a href=#1035 id=1035 data-nosnippet>1035</a> check_with_config(
<a href=#1036 id=1036 data-nosnippet>1036</a> InlayHintsConfig { render_colons: <span class="bool-val">true</span>, ..DISABLED_CONFIG },
<a href=#1037 id=1037 data-nosnippet>1037</a> <span class="string">r#"
<a href=#1038 id=1038 data-nosnippet>1038</a>fn foo(a: i32, b: i32) -&gt; i32 { a + b }
<a href=#1039 id=1039 data-nosnippet>1039</a>fn main() {
<a href=#1040 id=1040 data-nosnippet>1040</a> let _x = foo(4, 4);
<a href=#1041 id=1041 data-nosnippet>1041</a>}"#</span>,
<a href=#1042 id=1042 data-nosnippet>1042</a> );
<a href=#1043 id=1043 data-nosnippet>1043</a> }
<a href=#1044 id=1044 data-nosnippet>1044</a>
<a href=#1045 id=1045 data-nosnippet>1045</a> <span class="attr">#[test]
<a href=#1046 id=1046 data-nosnippet>1046</a> </span><span class="kw">fn </span>regression_18840() {
<a href=#1047 id=1047 data-nosnippet>1047</a> check(
<a href=#1048 id=1048 data-nosnippet>1048</a> <span class="string">r#"
<a href=#1049 id=1049 data-nosnippet>1049</a>//- proc_macros: issue_18840
<a href=#1050 id=1050 data-nosnippet>1050</a>#[proc_macros::issue_18840]
<a href=#1051 id=1051 data-nosnippet>1051</a>fn foo() {
<a href=#1052 id=1052 data-nosnippet>1052</a> let
<a href=#1053 id=1053 data-nosnippet>1053</a> loop {}
<a href=#1054 id=1054 data-nosnippet>1054</a>}
<a href=#1055 id=1055 data-nosnippet>1055</a>"#</span>,
<a href=#1056 id=1056 data-nosnippet>1056</a> );
<a href=#1057 id=1057 data-nosnippet>1057</a> }
<a href=#1058 id=1058 data-nosnippet>1058</a>
<a href=#1059 id=1059 data-nosnippet>1059</a> <span class="attr">#[test]
<a href=#1060 id=1060 data-nosnippet>1060</a> </span><span class="kw">fn </span>regression_18898() {
<a href=#1061 id=1061 data-nosnippet>1061</a> check(
<a href=#1062 id=1062 data-nosnippet>1062</a> <span class="string">r#"
<a href=#1063 id=1063 data-nosnippet>1063</a>//- proc_macros: issue_18898
<a href=#1064 id=1064 data-nosnippet>1064</a>#[proc_macros::issue_18898]
<a href=#1065 id=1065 data-nosnippet>1065</a>fn foo() {
<a href=#1066 id=1066 data-nosnippet>1066</a> let
<a href=#1067 id=1067 data-nosnippet>1067</a>}
<a href=#1068 id=1068 data-nosnippet>1068</a>"#</span>,
<a href=#1069 id=1069 data-nosnippet>1069</a> );
<a href=#1070 id=1070 data-nosnippet>1070</a> }
<a href=#1071 id=1071 data-nosnippet>1071</a>
<a href=#1072 id=1072 data-nosnippet>1072</a> <span class="attr">#[test]
<a href=#1073 id=1073 data-nosnippet>1073</a> </span><span class="kw">fn </span>closure_dependency_cycle_no_panic() {
<a href=#1074 id=1074 data-nosnippet>1074</a> check(
<a href=#1075 id=1075 data-nosnippet>1075</a> <span class="string">r#"
<a href=#1076 id=1076 data-nosnippet>1076</a>fn foo() {
<a href=#1077 id=1077 data-nosnippet>1077</a> let closure;
<a href=#1078 id=1078 data-nosnippet>1078</a> // ^^^^^^^ impl Fn()
<a href=#1079 id=1079 data-nosnippet>1079</a> closure = || {
<a href=#1080 id=1080 data-nosnippet>1080</a> closure();
<a href=#1081 id=1081 data-nosnippet>1081</a> };
<a href=#1082 id=1082 data-nosnippet>1082</a>}
<a href=#1083 id=1083 data-nosnippet>1083</a>
<a href=#1084 id=1084 data-nosnippet>1084</a>fn bar() {
<a href=#1085 id=1085 data-nosnippet>1085</a> let closure1;
<a href=#1086 id=1086 data-nosnippet>1086</a> // ^^^^^^^^ impl Fn()
<a href=#1087 id=1087 data-nosnippet>1087</a> let closure2;
<a href=#1088 id=1088 data-nosnippet>1088</a> // ^^^^^^^^ impl Fn()
<a href=#1089 id=1089 data-nosnippet>1089</a> closure1 = || {
<a href=#1090 id=1090 data-nosnippet>1090</a> closure2();
<a href=#1091 id=1091 data-nosnippet>1091</a> };
<a href=#1092 id=1092 data-nosnippet>1092</a> closure2 = || {
<a href=#1093 id=1093 data-nosnippet>1093</a> closure1();
<a href=#1094 id=1094 data-nosnippet>1094</a> };
<a href=#1095 id=1095 data-nosnippet>1095</a>}
<a href=#1096 id=1096 data-nosnippet>1096</a> "#</span>,
<a href=#1097 id=1097 data-nosnippet>1097</a> );
<a href=#1098 id=1098 data-nosnippet>1098</a> }
<a href=#1099 id=1099 data-nosnippet>1099</a>
<a href=#1100 id=1100 data-nosnippet>1100</a> <span class="attr">#[test]
<a href=#1101 id=1101 data-nosnippet>1101</a> </span><span class="kw">fn </span>regression_19610() {
<a href=#1102 id=1102 data-nosnippet>1102</a> check(
<a href=#1103 id=1103 data-nosnippet>1103</a> <span class="string">r#"
<a href=#1104 id=1104 data-nosnippet>1104</a>trait Trait {
<a href=#1105 id=1105 data-nosnippet>1105</a> type Assoc;
<a href=#1106 id=1106 data-nosnippet>1106</a>}
<a href=#1107 id=1107 data-nosnippet>1107</a>struct Foo&lt;A&gt;(A);
<a href=#1108 id=1108 data-nosnippet>1108</a>impl&lt;A: Trait&lt;Assoc = impl Trait&gt;&gt; Foo&lt;A&gt; {
<a href=#1109 id=1109 data-nosnippet>1109</a> fn foo&lt;'a, 'b&gt;(_: &amp;'a [i32], _: &amp;'b [i32]) {}
<a href=#1110 id=1110 data-nosnippet>1110</a>}
<a href=#1111 id=1111 data-nosnippet>1111</a>
<a href=#1112 id=1112 data-nosnippet>1112</a>fn bar() {
<a href=#1113 id=1113 data-nosnippet>1113</a> Foo::foo(&amp;[1], &amp;[2]);
<a href=#1114 id=1114 data-nosnippet>1114</a>}
<a href=#1115 id=1115 data-nosnippet>1115</a>"#</span>,
<a href=#1116 id=1116 data-nosnippet>1116</a> );
<a href=#1117 id=1117 data-nosnippet>1117</a> }
<a href=#1118 id=1118 data-nosnippet>1118</a>
<a href=#1119 id=1119 data-nosnippet>1119</a> <span class="attr">#[test]
<a href=#1120 id=1120 data-nosnippet>1120</a> </span><span class="kw">fn </span>regression_20239() {
<a href=#1121 id=1121 data-nosnippet>1121</a> check_with_config(
<a href=#1122 id=1122 data-nosnippet>1122</a> InlayHintsConfig { parameter_hints: <span class="bool-val">true</span>, type_hints: <span class="bool-val">true</span>, ..DISABLED_CONFIG },
<a href=#1123 id=1123 data-nosnippet>1123</a> <span class="string">r#"
<a href=#1124 id=1124 data-nosnippet>1124</a>//- minicore: fn
<a href=#1125 id=1125 data-nosnippet>1125</a>trait Iterator {
<a href=#1126 id=1126 data-nosnippet>1126</a> type Item;
<a href=#1127 id=1127 data-nosnippet>1127</a> fn map&lt;B, F: FnMut(Self::Item) -&gt; B&gt;(self, f: F);
<a href=#1128 id=1128 data-nosnippet>1128</a>}
<a href=#1129 id=1129 data-nosnippet>1129</a>trait ToString {
<a href=#1130 id=1130 data-nosnippet>1130</a> fn to_string(&amp;self);
<a href=#1131 id=1131 data-nosnippet>1131</a>}
<a href=#1132 id=1132 data-nosnippet>1132</a>
<a href=#1133 id=1133 data-nosnippet>1133</a>fn check_tostr_eq&lt;L, R&gt;(left: L, right: R)
<a href=#1134 id=1134 data-nosnippet>1134</a>where
<a href=#1135 id=1135 data-nosnippet>1135</a> L: Iterator,
<a href=#1136 id=1136 data-nosnippet>1136</a> L::Item: ToString,
<a href=#1137 id=1137 data-nosnippet>1137</a> R: Iterator,
<a href=#1138 id=1138 data-nosnippet>1138</a> R::Item: ToString,
<a href=#1139 id=1139 data-nosnippet>1139</a>{
<a href=#1140 id=1140 data-nosnippet>1140</a> left.map(|s| s.to_string());
<a href=#1141 id=1141 data-nosnippet>1141</a> // ^ impl ToString
<a href=#1142 id=1142 data-nosnippet>1142</a> right.map(|s| s.to_string());
<a href=#1143 id=1143 data-nosnippet>1143</a> // ^ impl ToString
<a href=#1144 id=1144 data-nosnippet>1144</a>}
<a href=#1145 id=1145 data-nosnippet>1145</a> "#</span>,
<a href=#1146 id=1146 data-nosnippet>1146</a> );
<a href=#1147 id=1147 data-nosnippet>1147</a> }
<a href=#1148 id=1148 data-nosnippet>1148</a>}
</code></pre></div></section></main></body></html>