| <!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/folding_ranges.rs`."><title>folding_ranges.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>folding_ranges.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span>ide_db::{FxHashSet, syntax_helpers::node_ext::vis_eq}; |
| <a href=#2 id=2 data-nosnippet>2</a><span class="kw">use </span>syntax::{ |
| <a href=#3 id=3 data-nosnippet>3</a> Direction, NodeOrToken, SourceFile, |
| <a href=#4 id=4 data-nosnippet>4</a> SyntaxKind::{<span class="self">self</span>, <span class="kw-2">*</span>}, |
| <a href=#5 id=5 data-nosnippet>5</a> SyntaxNode, TextRange, TextSize, |
| <a href=#6 id=6 data-nosnippet>6</a> ast::{<span class="self">self</span>, AstNode, AstToken}, |
| <a href=#7 id=7 data-nosnippet>7</a> match_ast, |
| <a href=#8 id=8 data-nosnippet>8</a>}; |
| <a href=#9 id=9 data-nosnippet>9</a> |
| <a href=#10 id=10 data-nosnippet>10</a><span class="kw">use </span>std::hash::Hash; |
| <a href=#11 id=11 data-nosnippet>11</a> |
| <a href=#12 id=12 data-nosnippet>12</a><span class="kw">const </span>REGION_START: <span class="kw-2">&</span>str = <span class="string">"// region:"</span>; |
| <a href=#13 id=13 data-nosnippet>13</a><span class="kw">const </span>REGION_END: <span class="kw-2">&</span>str = <span class="string">"// endregion"</span>; |
| <a href=#14 id=14 data-nosnippet>14</a> |
| <a href=#15 id=15 data-nosnippet>15</a><span class="attr">#[derive(Debug, PartialEq, Eq)] |
| <a href=#16 id=16 data-nosnippet>16</a></span><span class="kw">pub enum </span>FoldKind { |
| <a href=#17 id=17 data-nosnippet>17</a> Comment, |
| <a href=#18 id=18 data-nosnippet>18</a> Imports, |
| <a href=#19 id=19 data-nosnippet>19</a> Region, |
| <a href=#20 id=20 data-nosnippet>20</a> Block, |
| <a href=#21 id=21 data-nosnippet>21</a> ArgList, |
| <a href=#22 id=22 data-nosnippet>22</a> Array, |
| <a href=#23 id=23 data-nosnippet>23</a> WhereClause, |
| <a href=#24 id=24 data-nosnippet>24</a> ReturnType, |
| <a href=#25 id=25 data-nosnippet>25</a> MatchArm, |
| <a href=#26 id=26 data-nosnippet>26</a> Function, |
| <a href=#27 id=27 data-nosnippet>27</a> <span class="comment">// region: item runs |
| <a href=#28 id=28 data-nosnippet>28</a> </span>Modules, |
| <a href=#29 id=29 data-nosnippet>29</a> Consts, |
| <a href=#30 id=30 data-nosnippet>30</a> Statics, |
| <a href=#31 id=31 data-nosnippet>31</a> TypeAliases, |
| <a href=#32 id=32 data-nosnippet>32</a> ExternCrates, |
| <a href=#33 id=33 data-nosnippet>33</a> <span class="comment">// endregion: item runs |
| <a href=#34 id=34 data-nosnippet>34</a></span>} |
| <a href=#35 id=35 data-nosnippet>35</a> |
| <a href=#36 id=36 data-nosnippet>36</a><span class="attr">#[derive(Debug)] |
| <a href=#37 id=37 data-nosnippet>37</a></span><span class="kw">pub struct </span>Fold { |
| <a href=#38 id=38 data-nosnippet>38</a> <span class="kw">pub </span>range: TextRange, |
| <a href=#39 id=39 data-nosnippet>39</a> <span class="kw">pub </span>kind: FoldKind, |
| <a href=#40 id=40 data-nosnippet>40</a>} |
| <a href=#41 id=41 data-nosnippet>41</a> |
| <a href=#42 id=42 data-nosnippet>42</a><span class="comment">// Feature: Folding |
| <a href=#43 id=43 data-nosnippet>43</a>// |
| <a href=#44 id=44 data-nosnippet>44</a>// Defines folding regions for curly braced blocks, runs of consecutive use, mod, const or static |
| <a href=#45 id=45 data-nosnippet>45</a>// items, and `region` / `endregion` comment markers. |
| <a href=#46 id=46 data-nosnippet>46</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>folding_ranges(file: <span class="kw-2">&</span>SourceFile) -> Vec<Fold> { |
| <a href=#47 id=47 data-nosnippet>47</a> <span class="kw">let </span><span class="kw-2">mut </span>res = <span class="macro">vec!</span>[]; |
| <a href=#48 id=48 data-nosnippet>48</a> <span class="kw">let </span><span class="kw-2">mut </span>visited_comments = FxHashSet::default(); |
| <a href=#49 id=49 data-nosnippet>49</a> <span class="kw">let </span><span class="kw-2">mut </span>visited_nodes = FxHashSet::default(); |
| <a href=#50 id=50 data-nosnippet>50</a> |
| <a href=#51 id=51 data-nosnippet>51</a> <span class="comment">// regions can be nested, here is a LIFO buffer |
| <a href=#52 id=52 data-nosnippet>52</a> </span><span class="kw">let </span><span class="kw-2">mut </span>region_starts: Vec<TextSize> = <span class="macro">vec!</span>[]; |
| <a href=#53 id=53 data-nosnippet>53</a> |
| <a href=#54 id=54 data-nosnippet>54</a> <span class="kw">for </span>element <span class="kw">in </span>file.syntax().descendants_with_tokens() { |
| <a href=#55 id=55 data-nosnippet>55</a> <span class="comment">// Fold items that span multiple lines |
| <a href=#56 id=56 data-nosnippet>56</a> </span><span class="kw">if let </span><span class="prelude-val">Some</span>(kind) = fold_kind(element.kind()) { |
| <a href=#57 id=57 data-nosnippet>57</a> <span class="kw">let </span>is_multiline = <span class="kw">match </span><span class="kw-2">&</span>element { |
| <a href=#58 id=58 data-nosnippet>58</a> NodeOrToken::Node(node) => node.text().contains_char(<span class="string">'\n'</span>), |
| <a href=#59 id=59 data-nosnippet>59</a> NodeOrToken::Token(token) => token.text().contains(<span class="string">'\n'</span>), |
| <a href=#60 id=60 data-nosnippet>60</a> }; |
| <a href=#61 id=61 data-nosnippet>61</a> <span class="kw">if </span>is_multiline { |
| <a href=#62 id=62 data-nosnippet>62</a> <span class="comment">// for the func with multiline param list |
| <a href=#63 id=63 data-nosnippet>63</a> </span><span class="kw">if </span><span class="macro">matches!</span>(element.kind(), FN) |
| <a href=#64 id=64 data-nosnippet>64</a> && <span class="kw">let </span>NodeOrToken::Node(node) = <span class="kw-2">&</span>element |
| <a href=#65 id=65 data-nosnippet>65</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(fn_node) = ast::Fn::cast(node.clone()) |
| <a href=#66 id=66 data-nosnippet>66</a> { |
| <a href=#67 id=67 data-nosnippet>67</a> <span class="kw">if </span>!fn_node |
| <a href=#68 id=68 data-nosnippet>68</a> .param_list() |
| <a href=#69 id=69 data-nosnippet>69</a> .map(|param_list| param_list.syntax().text().contains_char(<span class="string">'\n'</span>)) |
| <a href=#70 id=70 data-nosnippet>70</a> .unwrap_or(<span class="bool-val">false</span>) |
| <a href=#71 id=71 data-nosnippet>71</a> { |
| <a href=#72 id=72 data-nosnippet>72</a> <span class="kw">continue</span>; |
| <a href=#73 id=73 data-nosnippet>73</a> } |
| <a href=#74 id=74 data-nosnippet>74</a> |
| <a href=#75 id=75 data-nosnippet>75</a> <span class="kw">if </span>fn_node.body().is_some() { |
| <a href=#76 id=76 data-nosnippet>76</a> <span class="comment">// Get the actual start of the function (excluding doc comments) |
| <a href=#77 id=77 data-nosnippet>77</a> </span><span class="kw">let </span>fn_start = fn_node |
| <a href=#78 id=78 data-nosnippet>78</a> .fn_token() |
| <a href=#79 id=79 data-nosnippet>79</a> .map(|token| token.text_range().start()) |
| <a href=#80 id=80 data-nosnippet>80</a> .unwrap_or(node.text_range().start()); |
| <a href=#81 id=81 data-nosnippet>81</a> res.push(Fold { |
| <a href=#82 id=82 data-nosnippet>82</a> range: TextRange::new(fn_start, node.text_range().end()), |
| <a href=#83 id=83 data-nosnippet>83</a> kind: FoldKind::Function, |
| <a href=#84 id=84 data-nosnippet>84</a> }); |
| <a href=#85 id=85 data-nosnippet>85</a> <span class="kw">continue</span>; |
| <a href=#86 id=86 data-nosnippet>86</a> } |
| <a href=#87 id=87 data-nosnippet>87</a> } |
| <a href=#88 id=88 data-nosnippet>88</a> res.push(Fold { range: element.text_range(), kind }); |
| <a href=#89 id=89 data-nosnippet>89</a> <span class="kw">continue</span>; |
| <a href=#90 id=90 data-nosnippet>90</a> } |
| <a href=#91 id=91 data-nosnippet>91</a> } |
| <a href=#92 id=92 data-nosnippet>92</a> |
| <a href=#93 id=93 data-nosnippet>93</a> <span class="kw">match </span>element { |
| <a href=#94 id=94 data-nosnippet>94</a> NodeOrToken::Token(token) => { |
| <a href=#95 id=95 data-nosnippet>95</a> <span class="comment">// Fold groups of comments |
| <a href=#96 id=96 data-nosnippet>96</a> </span><span class="kw">if let </span><span class="prelude-val">Some</span>(comment) = ast::Comment::cast(token) { |
| <a href=#97 id=97 data-nosnippet>97</a> <span class="kw">if </span>visited_comments.contains(<span class="kw-2">&</span>comment) { |
| <a href=#98 id=98 data-nosnippet>98</a> <span class="kw">continue</span>; |
| <a href=#99 id=99 data-nosnippet>99</a> } |
| <a href=#100 id=100 data-nosnippet>100</a> <span class="kw">let </span>text = comment.text().trim_start(); |
| <a href=#101 id=101 data-nosnippet>101</a> <span class="kw">if </span>text.starts_with(REGION_START) { |
| <a href=#102 id=102 data-nosnippet>102</a> region_starts.push(comment.syntax().text_range().start()); |
| <a href=#103 id=103 data-nosnippet>103</a> } <span class="kw">else if </span>text.starts_with(REGION_END) { |
| <a href=#104 id=104 data-nosnippet>104</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(region) = region_starts.pop() { |
| <a href=#105 id=105 data-nosnippet>105</a> res.push(Fold { |
| <a href=#106 id=106 data-nosnippet>106</a> range: TextRange::new(region, comment.syntax().text_range().end()), |
| <a href=#107 id=107 data-nosnippet>107</a> kind: FoldKind::Region, |
| <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">else if let </span><span class="prelude-val">Some</span>(range) = |
| <a href=#111 id=111 data-nosnippet>111</a> contiguous_range_for_comment(comment, <span class="kw-2">&mut </span>visited_comments) |
| <a href=#112 id=112 data-nosnippet>112</a> { |
| <a href=#113 id=113 data-nosnippet>113</a> res.push(Fold { range, kind: FoldKind::Comment }) |
| <a href=#114 id=114 data-nosnippet>114</a> } |
| <a href=#115 id=115 data-nosnippet>115</a> } |
| <a href=#116 id=116 data-nosnippet>116</a> } |
| <a href=#117 id=117 data-nosnippet>117</a> NodeOrToken::Node(node) => { |
| <a href=#118 id=118 data-nosnippet>118</a> <span class="macro">match_ast!</span> { |
| <a href=#119 id=119 data-nosnippet>119</a> <span class="kw">match </span>node { |
| <a href=#120 id=120 data-nosnippet>120</a> ast::Module(module) => { |
| <a href=#121 id=121 data-nosnippet>121</a> <span class="kw">if </span>module.item_list().is_none() |
| <a href=#122 id=122 data-nosnippet>122</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(range) = contiguous_range_for_item_group( |
| <a href=#123 id=123 data-nosnippet>123</a> module, |
| <a href=#124 id=124 data-nosnippet>124</a> <span class="kw-2">&mut </span>visited_nodes, |
| <a href=#125 id=125 data-nosnippet>125</a> ) { |
| <a href=#126 id=126 data-nosnippet>126</a> res.push(Fold { range, kind: FoldKind::Modules }) |
| <a href=#127 id=127 data-nosnippet>127</a> } |
| <a href=#128 id=128 data-nosnippet>128</a> }, |
| <a href=#129 id=129 data-nosnippet>129</a> ast::Use(use_) => { |
| <a href=#130 id=130 data-nosnippet>130</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range) = contiguous_range_for_item_group(use_, <span class="kw-2">&mut </span>visited_nodes) { |
| <a href=#131 id=131 data-nosnippet>131</a> res.push(Fold { range, kind: FoldKind::Imports }) |
| <a href=#132 id=132 data-nosnippet>132</a> } |
| <a href=#133 id=133 data-nosnippet>133</a> }, |
| <a href=#134 id=134 data-nosnippet>134</a> ast::Const(konst) => { |
| <a href=#135 id=135 data-nosnippet>135</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range) = contiguous_range_for_item_group(konst, <span class="kw-2">&mut </span>visited_nodes) { |
| <a href=#136 id=136 data-nosnippet>136</a> res.push(Fold { range, kind: FoldKind::Consts }) |
| <a href=#137 id=137 data-nosnippet>137</a> } |
| <a href=#138 id=138 data-nosnippet>138</a> }, |
| <a href=#139 id=139 data-nosnippet>139</a> ast::Static(statik) => { |
| <a href=#140 id=140 data-nosnippet>140</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range) = contiguous_range_for_item_group(statik, <span class="kw-2">&mut </span>visited_nodes) { |
| <a href=#141 id=141 data-nosnippet>141</a> res.push(Fold { range, kind: FoldKind::Statics }) |
| <a href=#142 id=142 data-nosnippet>142</a> } |
| <a href=#143 id=143 data-nosnippet>143</a> }, |
| <a href=#144 id=144 data-nosnippet>144</a> ast::TypeAlias(alias) => { |
| <a href=#145 id=145 data-nosnippet>145</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range) = contiguous_range_for_item_group(alias, <span class="kw-2">&mut </span>visited_nodes) { |
| <a href=#146 id=146 data-nosnippet>146</a> res.push(Fold { range, kind: FoldKind::TypeAliases }) |
| <a href=#147 id=147 data-nosnippet>147</a> } |
| <a href=#148 id=148 data-nosnippet>148</a> }, |
| <a href=#149 id=149 data-nosnippet>149</a> ast::ExternCrate(extern_crate) => { |
| <a href=#150 id=150 data-nosnippet>150</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range) = contiguous_range_for_item_group(extern_crate, <span class="kw-2">&mut </span>visited_nodes) { |
| <a href=#151 id=151 data-nosnippet>151</a> res.push(Fold { range, kind: FoldKind::ExternCrates }) |
| <a href=#152 id=152 data-nosnippet>152</a> } |
| <a href=#153 id=153 data-nosnippet>153</a> }, |
| <a href=#154 id=154 data-nosnippet>154</a> ast::MatchArm(match_arm) => { |
| <a href=#155 id=155 data-nosnippet>155</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(range) = fold_range_for_multiline_match_arm(match_arm) { |
| <a href=#156 id=156 data-nosnippet>156</a> res.push(Fold {range, kind: FoldKind::MatchArm}) |
| <a href=#157 id=157 data-nosnippet>157</a> } |
| <a href=#158 id=158 data-nosnippet>158</a> }, |
| <a href=#159 id=159 data-nosnippet>159</a> <span class="kw">_ </span>=> (), |
| <a href=#160 id=160 data-nosnippet>160</a> } |
| <a href=#161 id=161 data-nosnippet>161</a> } |
| <a href=#162 id=162 data-nosnippet>162</a> } |
| <a href=#163 id=163 data-nosnippet>163</a> } |
| <a href=#164 id=164 data-nosnippet>164</a> } |
| <a href=#165 id=165 data-nosnippet>165</a> |
| <a href=#166 id=166 data-nosnippet>166</a> res |
| <a href=#167 id=167 data-nosnippet>167</a>} |
| <a href=#168 id=168 data-nosnippet>168</a> |
| <a href=#169 id=169 data-nosnippet>169</a><span class="kw">fn </span>fold_kind(kind: SyntaxKind) -> <span class="prelude-ty">Option</span><FoldKind> { |
| <a href=#170 id=170 data-nosnippet>170</a> <span class="kw">match </span>kind { |
| <a href=#171 id=171 data-nosnippet>171</a> COMMENT => <span class="prelude-val">Some</span>(FoldKind::Comment), |
| <a href=#172 id=172 data-nosnippet>172</a> ARG_LIST | PARAM_LIST | GENERIC_ARG_LIST | GENERIC_PARAM_LIST => <span class="prelude-val">Some</span>(FoldKind::ArgList), |
| <a href=#173 id=173 data-nosnippet>173</a> ARRAY_EXPR => <span class="prelude-val">Some</span>(FoldKind::Array), |
| <a href=#174 id=174 data-nosnippet>174</a> RET_TYPE => <span class="prelude-val">Some</span>(FoldKind::ReturnType), |
| <a href=#175 id=175 data-nosnippet>175</a> FN => <span class="prelude-val">Some</span>(FoldKind::Function), |
| <a href=#176 id=176 data-nosnippet>176</a> WHERE_CLAUSE => <span class="prelude-val">Some</span>(FoldKind::WhereClause), |
| <a href=#177 id=177 data-nosnippet>177</a> ASSOC_ITEM_LIST |
| <a href=#178 id=178 data-nosnippet>178</a> | RECORD_FIELD_LIST |
| <a href=#179 id=179 data-nosnippet>179</a> | RECORD_PAT_FIELD_LIST |
| <a href=#180 id=180 data-nosnippet>180</a> | RECORD_EXPR_FIELD_LIST |
| <a href=#181 id=181 data-nosnippet>181</a> | ITEM_LIST |
| <a href=#182 id=182 data-nosnippet>182</a> | EXTERN_ITEM_LIST |
| <a href=#183 id=183 data-nosnippet>183</a> | USE_TREE_LIST |
| <a href=#184 id=184 data-nosnippet>184</a> | BLOCK_EXPR |
| <a href=#185 id=185 data-nosnippet>185</a> | MATCH_ARM_LIST |
| <a href=#186 id=186 data-nosnippet>186</a> | VARIANT_LIST |
| <a href=#187 id=187 data-nosnippet>187</a> | TOKEN_TREE => <span class="prelude-val">Some</span>(FoldKind::Block), |
| <a href=#188 id=188 data-nosnippet>188</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#189 id=189 data-nosnippet>189</a> } |
| <a href=#190 id=190 data-nosnippet>190</a>} |
| <a href=#191 id=191 data-nosnippet>191</a> |
| <a href=#192 id=192 data-nosnippet>192</a><span class="kw">fn </span>contiguous_range_for_item_group<N>( |
| <a href=#193 id=193 data-nosnippet>193</a> first: N, |
| <a href=#194 id=194 data-nosnippet>194</a> visited: <span class="kw-2">&mut </span>FxHashSet<SyntaxNode>, |
| <a href=#195 id=195 data-nosnippet>195</a>) -> <span class="prelude-ty">Option</span><TextRange> |
| <a href=#196 id=196 data-nosnippet>196</a><span class="kw">where |
| <a href=#197 id=197 data-nosnippet>197</a> </span>N: ast::HasVisibility + Clone + Hash + Eq, |
| <a href=#198 id=198 data-nosnippet>198</a>{ |
| <a href=#199 id=199 data-nosnippet>199</a> <span class="kw">if </span>!visited.insert(first.syntax().clone()) { |
| <a href=#200 id=200 data-nosnippet>200</a> <span class="kw">return </span><span class="prelude-val">None</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> <span class="kw">let </span>(<span class="kw-2">mut </span>last, <span class="kw-2">mut </span>last_vis) = (first.clone(), first.visibility()); |
| <a href=#204 id=204 data-nosnippet>204</a> <span class="kw">for </span>element <span class="kw">in </span>first.syntax().siblings_with_tokens(Direction::Next) { |
| <a href=#205 id=205 data-nosnippet>205</a> <span class="kw">let </span>node = <span class="kw">match </span>element { |
| <a href=#206 id=206 data-nosnippet>206</a> NodeOrToken::Token(token) => { |
| <a href=#207 id=207 data-nosnippet>207</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(ws) = ast::Whitespace::cast(token) |
| <a href=#208 id=208 data-nosnippet>208</a> && !ws.spans_multiple_lines() |
| <a href=#209 id=209 data-nosnippet>209</a> { |
| <a href=#210 id=210 data-nosnippet>210</a> <span class="comment">// Ignore whitespace without blank lines |
| <a href=#211 id=211 data-nosnippet>211</a> </span><span class="kw">continue</span>; |
| <a href=#212 id=212 data-nosnippet>212</a> } |
| <a href=#213 id=213 data-nosnippet>213</a> <span class="comment">// There is a blank line or another token, which means that the |
| <a href=#214 id=214 data-nosnippet>214</a> // group ends here |
| <a href=#215 id=215 data-nosnippet>215</a> </span><span class="kw">break</span>; |
| <a href=#216 id=216 data-nosnippet>216</a> } |
| <a href=#217 id=217 data-nosnippet>217</a> NodeOrToken::Node(node) => node, |
| <a href=#218 id=218 data-nosnippet>218</a> }; |
| <a href=#219 id=219 data-nosnippet>219</a> |
| <a href=#220 id=220 data-nosnippet>220</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(next) = N::cast(node) { |
| <a href=#221 id=221 data-nosnippet>221</a> <span class="kw">let </span>next_vis = next.visibility(); |
| <a href=#222 id=222 data-nosnippet>222</a> <span class="kw">if </span>eq_visibility(next_vis.clone(), last_vis) { |
| <a href=#223 id=223 data-nosnippet>223</a> visited.insert(next.syntax().clone()); |
| <a href=#224 id=224 data-nosnippet>224</a> last_vis = next_vis; |
| <a href=#225 id=225 data-nosnippet>225</a> last = next; |
| <a href=#226 id=226 data-nosnippet>226</a> <span class="kw">continue</span>; |
| <a href=#227 id=227 data-nosnippet>227</a> } |
| <a href=#228 id=228 data-nosnippet>228</a> } |
| <a href=#229 id=229 data-nosnippet>229</a> <span class="comment">// Stop if we find an item of a different kind or with a different visibility. |
| <a href=#230 id=230 data-nosnippet>230</a> </span><span class="kw">break</span>; |
| <a href=#231 id=231 data-nosnippet>231</a> } |
| <a href=#232 id=232 data-nosnippet>232</a> |
| <a href=#233 id=233 data-nosnippet>233</a> <span class="kw">if </span><span class="macro">first !</span>= last { |
| <a href=#234 id=234 data-nosnippet>234</a> <span class="prelude-val">Some</span>(TextRange::new(first.syntax().text_range().start(), last.syntax().text_range().end())) |
| <a href=#235 id=235 data-nosnippet>235</a> } <span class="kw">else </span>{ |
| <a href=#236 id=236 data-nosnippet>236</a> <span class="comment">// The group consists of only one element, therefore it cannot be folded |
| <a href=#237 id=237 data-nosnippet>237</a> </span><span class="prelude-val">None |
| <a href=#238 id=238 data-nosnippet>238</a> </span>} |
| <a href=#239 id=239 data-nosnippet>239</a>} |
| <a href=#240 id=240 data-nosnippet>240</a> |
| <a href=#241 id=241 data-nosnippet>241</a><span class="kw">fn </span>eq_visibility(vis0: <span class="prelude-ty">Option</span><ast::Visibility>, vis1: <span class="prelude-ty">Option</span><ast::Visibility>) -> bool { |
| <a href=#242 id=242 data-nosnippet>242</a> <span class="kw">match </span>(vis0, vis1) { |
| <a href=#243 id=243 data-nosnippet>243</a> (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="bool-val">true</span>, |
| <a href=#244 id=244 data-nosnippet>244</a> (<span class="prelude-val">Some</span>(vis0), <span class="prelude-val">Some</span>(vis1)) => vis_eq(<span class="kw-2">&</span>vis0, <span class="kw-2">&</span>vis1), |
| <a href=#245 id=245 data-nosnippet>245</a> <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| <a href=#246 id=246 data-nosnippet>246</a> } |
| <a href=#247 id=247 data-nosnippet>247</a>} |
| <a href=#248 id=248 data-nosnippet>248</a> |
| <a href=#249 id=249 data-nosnippet>249</a><span class="kw">fn </span>contiguous_range_for_comment( |
| <a href=#250 id=250 data-nosnippet>250</a> first: ast::Comment, |
| <a href=#251 id=251 data-nosnippet>251</a> visited: <span class="kw-2">&mut </span>FxHashSet<ast::Comment>, |
| <a href=#252 id=252 data-nosnippet>252</a>) -> <span class="prelude-ty">Option</span><TextRange> { |
| <a href=#253 id=253 data-nosnippet>253</a> visited.insert(first.clone()); |
| <a href=#254 id=254 data-nosnippet>254</a> |
| <a href=#255 id=255 data-nosnippet>255</a> <span class="comment">// Only fold comments of the same flavor |
| <a href=#256 id=256 data-nosnippet>256</a> </span><span class="kw">let </span>group_kind = first.kind(); |
| <a href=#257 id=257 data-nosnippet>257</a> <span class="kw">if </span>!group_kind.shape.is_line() { |
| <a href=#258 id=258 data-nosnippet>258</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#259 id=259 data-nosnippet>259</a> } |
| <a href=#260 id=260 data-nosnippet>260</a> |
| <a href=#261 id=261 data-nosnippet>261</a> <span class="kw">let </span><span class="kw-2">mut </span>last = first.clone(); |
| <a href=#262 id=262 data-nosnippet>262</a> <span class="kw">for </span>element <span class="kw">in </span>first.syntax().siblings_with_tokens(Direction::Next) { |
| <a href=#263 id=263 data-nosnippet>263</a> <span class="kw">match </span>element { |
| <a href=#264 id=264 data-nosnippet>264</a> NodeOrToken::Token(token) => { |
| <a href=#265 id=265 data-nosnippet>265</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(ws) = ast::Whitespace::cast(token.clone()) |
| <a href=#266 id=266 data-nosnippet>266</a> && !ws.spans_multiple_lines() |
| <a href=#267 id=267 data-nosnippet>267</a> { |
| <a href=#268 id=268 data-nosnippet>268</a> <span class="comment">// Ignore whitespace without blank lines |
| <a href=#269 id=269 data-nosnippet>269</a> </span><span class="kw">continue</span>; |
| <a href=#270 id=270 data-nosnippet>270</a> } |
| <a href=#271 id=271 data-nosnippet>271</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(c) = ast::Comment::cast(token) |
| <a href=#272 id=272 data-nosnippet>272</a> && c.kind() == group_kind |
| <a href=#273 id=273 data-nosnippet>273</a> { |
| <a href=#274 id=274 data-nosnippet>274</a> <span class="kw">let </span>text = c.text().trim_start(); |
| <a href=#275 id=275 data-nosnippet>275</a> <span class="comment">// regions are not real comments |
| <a href=#276 id=276 data-nosnippet>276</a> </span><span class="kw">if </span>!(text.starts_with(REGION_START) || text.starts_with(REGION_END)) { |
| <a href=#277 id=277 data-nosnippet>277</a> visited.insert(c.clone()); |
| <a href=#278 id=278 data-nosnippet>278</a> last = c; |
| <a href=#279 id=279 data-nosnippet>279</a> <span class="kw">continue</span>; |
| <a href=#280 id=280 data-nosnippet>280</a> } |
| <a href=#281 id=281 data-nosnippet>281</a> } |
| <a href=#282 id=282 data-nosnippet>282</a> <span class="comment">// The comment group ends because either: |
| <a href=#283 id=283 data-nosnippet>283</a> // * An element of a different kind was reached |
| <a href=#284 id=284 data-nosnippet>284</a> // * A comment of a different flavor was reached |
| <a href=#285 id=285 data-nosnippet>285</a> </span><span class="kw">break</span>; |
| <a href=#286 id=286 data-nosnippet>286</a> } |
| <a href=#287 id=287 data-nosnippet>287</a> NodeOrToken::Node(<span class="kw">_</span>) => <span class="kw">break</span>, |
| <a href=#288 id=288 data-nosnippet>288</a> }; |
| <a href=#289 id=289 data-nosnippet>289</a> } |
| <a href=#290 id=290 data-nosnippet>290</a> |
| <a href=#291 id=291 data-nosnippet>291</a> <span class="kw">if </span><span class="macro">first !</span>= last { |
| <a href=#292 id=292 data-nosnippet>292</a> <span class="prelude-val">Some</span>(TextRange::new(first.syntax().text_range().start(), last.syntax().text_range().end())) |
| <a href=#293 id=293 data-nosnippet>293</a> } <span class="kw">else </span>{ |
| <a href=#294 id=294 data-nosnippet>294</a> <span class="comment">// The group consists of only one element, therefore it cannot be folded |
| <a href=#295 id=295 data-nosnippet>295</a> </span><span class="prelude-val">None |
| <a href=#296 id=296 data-nosnippet>296</a> </span>} |
| <a href=#297 id=297 data-nosnippet>297</a>} |
| <a href=#298 id=298 data-nosnippet>298</a> |
| <a href=#299 id=299 data-nosnippet>299</a><span class="kw">fn </span>fold_range_for_multiline_match_arm(match_arm: ast::MatchArm) -> <span class="prelude-ty">Option</span><TextRange> { |
| <a href=#300 id=300 data-nosnippet>300</a> <span class="kw">if </span>fold_kind(match_arm.expr()<span class="question-mark">?</span>.syntax().kind()).is_some() { |
| <a href=#301 id=301 data-nosnippet>301</a> <span class="prelude-val">None |
| <a href=#302 id=302 data-nosnippet>302</a> </span>} <span class="kw">else if </span>match_arm.expr()<span class="question-mark">?</span>.syntax().text().contains_char(<span class="string">'\n'</span>) { |
| <a href=#303 id=303 data-nosnippet>303</a> <span class="prelude-val">Some</span>(match_arm.expr()<span class="question-mark">?</span>.syntax().text_range()) |
| <a href=#304 id=304 data-nosnippet>304</a> } <span class="kw">else </span>{ |
| <a href=#305 id=305 data-nosnippet>305</a> <span class="prelude-val">None |
| <a href=#306 id=306 data-nosnippet>306</a> </span>} |
| <a href=#307 id=307 data-nosnippet>307</a>} |
| <a href=#308 id=308 data-nosnippet>308</a> |
| <a href=#309 id=309 data-nosnippet>309</a><span class="attr">#[cfg(test)] |
| <a href=#310 id=310 data-nosnippet>310</a></span><span class="kw">mod </span>tests { |
| <a href=#311 id=311 data-nosnippet>311</a> <span class="kw">use </span>test_utils::extract_tags; |
| <a href=#312 id=312 data-nosnippet>312</a> |
| <a href=#313 id=313 data-nosnippet>313</a> <span class="kw">use </span>super::<span class="kw-2">*</span>; |
| <a href=#314 id=314 data-nosnippet>314</a> |
| <a href=#315 id=315 data-nosnippet>315</a> <span class="attr">#[track_caller] |
| <a href=#316 id=316 data-nosnippet>316</a> </span><span class="kw">fn </span>check(<span class="attr">#[rust_analyzer::rust_fixture] </span>ra_fixture: <span class="kw-2">&</span>str) { |
| <a href=#317 id=317 data-nosnippet>317</a> <span class="kw">let </span>(ranges, text) = extract_tags(ra_fixture, <span class="string">"fold"</span>); |
| <a href=#318 id=318 data-nosnippet>318</a> |
| <a href=#319 id=319 data-nosnippet>319</a> <span class="kw">let </span>parse = SourceFile::parse(<span class="kw-2">&</span>text, span::Edition::CURRENT); |
| <a href=#320 id=320 data-nosnippet>320</a> <span class="kw">let </span><span class="kw-2">mut </span>folds = folding_ranges(<span class="kw-2">&</span>parse.tree()); |
| <a href=#321 id=321 data-nosnippet>321</a> folds.sort_by_key(|fold| (fold.range.start(), fold.range.end())); |
| <a href=#322 id=322 data-nosnippet>322</a> |
| <a href=#323 id=323 data-nosnippet>323</a> <span class="macro">assert_eq!</span>( |
| <a href=#324 id=324 data-nosnippet>324</a> folds.len(), |
| <a href=#325 id=325 data-nosnippet>325</a> ranges.len(), |
| <a href=#326 id=326 data-nosnippet>326</a> <span class="string">"The amount of folds is different than the expected amount" |
| <a href=#327 id=327 data-nosnippet>327</a> </span>); |
| <a href=#328 id=328 data-nosnippet>328</a> |
| <a href=#329 id=329 data-nosnippet>329</a> <span class="kw">for </span>(fold, (range, attr)) <span class="kw">in </span>folds.iter().zip(ranges.into_iter()) { |
| <a href=#330 id=330 data-nosnippet>330</a> <span class="macro">assert_eq!</span>(fold.range.start(), range.start(), <span class="string">"mismatched start of folding ranges"</span>); |
| <a href=#331 id=331 data-nosnippet>331</a> <span class="macro">assert_eq!</span>(fold.range.end(), range.end(), <span class="string">"mismatched end of folding ranges"</span>); |
| <a href=#332 id=332 data-nosnippet>332</a> |
| <a href=#333 id=333 data-nosnippet>333</a> <span class="kw">let </span>kind = <span class="kw">match </span>fold.kind { |
| <a href=#334 id=334 data-nosnippet>334</a> FoldKind::Comment => <span class="string">"comment"</span>, |
| <a href=#335 id=335 data-nosnippet>335</a> FoldKind::Imports => <span class="string">"imports"</span>, |
| <a href=#336 id=336 data-nosnippet>336</a> FoldKind::Modules => <span class="string">"mods"</span>, |
| <a href=#337 id=337 data-nosnippet>337</a> FoldKind::Block => <span class="string">"block"</span>, |
| <a href=#338 id=338 data-nosnippet>338</a> FoldKind::ArgList => <span class="string">"arglist"</span>, |
| <a href=#339 id=339 data-nosnippet>339</a> FoldKind::Region => <span class="string">"region"</span>, |
| <a href=#340 id=340 data-nosnippet>340</a> FoldKind::Consts => <span class="string">"consts"</span>, |
| <a href=#341 id=341 data-nosnippet>341</a> FoldKind::Statics => <span class="string">"statics"</span>, |
| <a href=#342 id=342 data-nosnippet>342</a> FoldKind::TypeAliases => <span class="string">"typealiases"</span>, |
| <a href=#343 id=343 data-nosnippet>343</a> FoldKind::Array => <span class="string">"array"</span>, |
| <a href=#344 id=344 data-nosnippet>344</a> FoldKind::WhereClause => <span class="string">"whereclause"</span>, |
| <a href=#345 id=345 data-nosnippet>345</a> FoldKind::ReturnType => <span class="string">"returntype"</span>, |
| <a href=#346 id=346 data-nosnippet>346</a> FoldKind::MatchArm => <span class="string">"matcharm"</span>, |
| <a href=#347 id=347 data-nosnippet>347</a> FoldKind::Function => <span class="string">"function"</span>, |
| <a href=#348 id=348 data-nosnippet>348</a> FoldKind::ExternCrates => <span class="string">"externcrates"</span>, |
| <a href=#349 id=349 data-nosnippet>349</a> }; |
| <a href=#350 id=350 data-nosnippet>350</a> <span class="macro">assert_eq!</span>(kind, <span class="kw-2">&</span>attr.unwrap()); |
| <a href=#351 id=351 data-nosnippet>351</a> } |
| <a href=#352 id=352 data-nosnippet>352</a> } |
| <a href=#353 id=353 data-nosnippet>353</a> |
| <a href=#354 id=354 data-nosnippet>354</a> <span class="attr">#[test] |
| <a href=#355 id=355 data-nosnippet>355</a> </span><span class="kw">fn </span>test_fold_func_with_multiline_param_list() { |
| <a href=#356 id=356 data-nosnippet>356</a> check( |
| <a href=#357 id=357 data-nosnippet>357</a> <span class="string">r#" |
| <a href=#358 id=358 data-nosnippet>358</a><fold function>fn func<fold arglist>( |
| <a href=#359 id=359 data-nosnippet>359</a> a: i32, |
| <a href=#360 id=360 data-nosnippet>360</a> b: i32, |
| <a href=#361 id=361 data-nosnippet>361</a> c: i32, |
| <a href=#362 id=362 data-nosnippet>362</a>)</fold> <fold block>{ |
| <a href=#363 id=363 data-nosnippet>363</a> |
| <a href=#364 id=364 data-nosnippet>364</a> |
| <a href=#365 id=365 data-nosnippet>365</a> |
| <a href=#366 id=366 data-nosnippet>366</a>}</fold></fold> |
| <a href=#367 id=367 data-nosnippet>367</a>"#</span>, |
| <a href=#368 id=368 data-nosnippet>368</a> ); |
| <a href=#369 id=369 data-nosnippet>369</a> } |
| <a href=#370 id=370 data-nosnippet>370</a> |
| <a href=#371 id=371 data-nosnippet>371</a> <span class="attr">#[test] |
| <a href=#372 id=372 data-nosnippet>372</a> </span><span class="kw">fn </span>test_fold_comments() { |
| <a href=#373 id=373 data-nosnippet>373</a> check( |
| <a href=#374 id=374 data-nosnippet>374</a> <span class="string">r#" |
| <a href=#375 id=375 data-nosnippet>375</a><fold comment>// Hello |
| <a href=#376 id=376 data-nosnippet>376</a>// this is a multiline |
| <a href=#377 id=377 data-nosnippet>377</a>// comment |
| <a href=#378 id=378 data-nosnippet>378</a>//</fold> |
| <a href=#379 id=379 data-nosnippet>379</a> |
| <a href=#380 id=380 data-nosnippet>380</a>// But this is not |
| <a href=#381 id=381 data-nosnippet>381</a> |
| <a href=#382 id=382 data-nosnippet>382</a>fn main() <fold block>{ |
| <a href=#383 id=383 data-nosnippet>383</a> <fold comment>// We should |
| <a href=#384 id=384 data-nosnippet>384</a> // also |
| <a href=#385 id=385 data-nosnippet>385</a> // fold |
| <a href=#386 id=386 data-nosnippet>386</a> // this one.</fold> |
| <a href=#387 id=387 data-nosnippet>387</a> <fold comment>//! But this one is different |
| <a href=#388 id=388 data-nosnippet>388</a> //! because it has another flavor</fold> |
| <a href=#389 id=389 data-nosnippet>389</a> <fold comment>/* As does this |
| <a href=#390 id=390 data-nosnippet>390</a> multiline comment */</fold> |
| <a href=#391 id=391 data-nosnippet>391</a>}</fold> |
| <a href=#392 id=392 data-nosnippet>392</a>"#</span>, |
| <a href=#393 id=393 data-nosnippet>393</a> ); |
| <a href=#394 id=394 data-nosnippet>394</a> } |
| <a href=#395 id=395 data-nosnippet>395</a> |
| <a href=#396 id=396 data-nosnippet>396</a> <span class="attr">#[test] |
| <a href=#397 id=397 data-nosnippet>397</a> </span><span class="kw">fn </span>test_fold_imports() { |
| <a href=#398 id=398 data-nosnippet>398</a> check( |
| <a href=#399 id=399 data-nosnippet>399</a> <span class="string">r#" |
| <a href=#400 id=400 data-nosnippet>400</a>use std::<fold block>{ |
| <a href=#401 id=401 data-nosnippet>401</a> str, |
| <a href=#402 id=402 data-nosnippet>402</a> vec, |
| <a href=#403 id=403 data-nosnippet>403</a> io as iop |
| <a href=#404 id=404 data-nosnippet>404</a>}</fold>; |
| <a href=#405 id=405 data-nosnippet>405</a>"#</span>, |
| <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">#[test] |
| <a href=#410 id=410 data-nosnippet>410</a> </span><span class="kw">fn </span>test_fold_mods() { |
| <a href=#411 id=411 data-nosnippet>411</a> check( |
| <a href=#412 id=412 data-nosnippet>412</a> <span class="string">r#" |
| <a href=#413 id=413 data-nosnippet>413</a> |
| <a href=#414 id=414 data-nosnippet>414</a>pub mod foo; |
| <a href=#415 id=415 data-nosnippet>415</a><fold mods>mod after_pub; |
| <a href=#416 id=416 data-nosnippet>416</a>mod after_pub_next;</fold> |
| <a href=#417 id=417 data-nosnippet>417</a> |
| <a href=#418 id=418 data-nosnippet>418</a><fold mods>mod before_pub; |
| <a href=#419 id=419 data-nosnippet>419</a>mod before_pub_next;</fold> |
| <a href=#420 id=420 data-nosnippet>420</a>pub mod bar; |
| <a href=#421 id=421 data-nosnippet>421</a> |
| <a href=#422 id=422 data-nosnippet>422</a>mod not_folding_single; |
| <a href=#423 id=423 data-nosnippet>423</a>pub mod foobar; |
| <a href=#424 id=424 data-nosnippet>424</a>pub not_folding_single_next; |
| <a href=#425 id=425 data-nosnippet>425</a> |
| <a href=#426 id=426 data-nosnippet>426</a><fold mods>#[cfg(test)] |
| <a href=#427 id=427 data-nosnippet>427</a>mod with_attribute; |
| <a href=#428 id=428 data-nosnippet>428</a>mod with_attribute_next;</fold> |
| <a href=#429 id=429 data-nosnippet>429</a> |
| <a href=#430 id=430 data-nosnippet>430</a>mod inline0 {} |
| <a href=#431 id=431 data-nosnippet>431</a>mod inline1 {} |
| <a href=#432 id=432 data-nosnippet>432</a> |
| <a href=#433 id=433 data-nosnippet>433</a>mod inline2 <fold block>{ |
| <a href=#434 id=434 data-nosnippet>434</a> |
| <a href=#435 id=435 data-nosnippet>435</a>}</fold> |
| <a href=#436 id=436 data-nosnippet>436</a>"#</span>, |
| <a href=#437 id=437 data-nosnippet>437</a> ); |
| <a href=#438 id=438 data-nosnippet>438</a> } |
| <a href=#439 id=439 data-nosnippet>439</a> |
| <a href=#440 id=440 data-nosnippet>440</a> <span class="attr">#[test] |
| <a href=#441 id=441 data-nosnippet>441</a> </span><span class="kw">fn </span>test_fold_import_groups() { |
| <a href=#442 id=442 data-nosnippet>442</a> check( |
| <a href=#443 id=443 data-nosnippet>443</a> <span class="string">r#" |
| <a href=#444 id=444 data-nosnippet>444</a><fold imports>use std::str; |
| <a href=#445 id=445 data-nosnippet>445</a>use std::vec; |
| <a href=#446 id=446 data-nosnippet>446</a>use std::io as iop;</fold> |
| <a href=#447 id=447 data-nosnippet>447</a> |
| <a href=#448 id=448 data-nosnippet>448</a><fold imports>use std::mem; |
| <a href=#449 id=449 data-nosnippet>449</a>use std::f64;</fold> |
| <a href=#450 id=450 data-nosnippet>450</a> |
| <a href=#451 id=451 data-nosnippet>451</a><fold imports>use std::collections::HashMap; |
| <a href=#452 id=452 data-nosnippet>452</a>// Some random comment |
| <a href=#453 id=453 data-nosnippet>453</a>use std::collections::VecDeque;</fold> |
| <a href=#454 id=454 data-nosnippet>454</a>"#</span>, |
| <a href=#455 id=455 data-nosnippet>455</a> ); |
| <a href=#456 id=456 data-nosnippet>456</a> } |
| <a href=#457 id=457 data-nosnippet>457</a> |
| <a href=#458 id=458 data-nosnippet>458</a> <span class="attr">#[test] |
| <a href=#459 id=459 data-nosnippet>459</a> </span><span class="kw">fn </span>test_fold_import_and_groups() { |
| <a href=#460 id=460 data-nosnippet>460</a> check( |
| <a href=#461 id=461 data-nosnippet>461</a> <span class="string">r#" |
| <a href=#462 id=462 data-nosnippet>462</a><fold imports>use std::str; |
| <a href=#463 id=463 data-nosnippet>463</a>use std::vec; |
| <a href=#464 id=464 data-nosnippet>464</a>use std::io as iop;</fold> |
| <a href=#465 id=465 data-nosnippet>465</a> |
| <a href=#466 id=466 data-nosnippet>466</a><fold imports>use std::mem; |
| <a href=#467 id=467 data-nosnippet>467</a>use std::f64;</fold> |
| <a href=#468 id=468 data-nosnippet>468</a> |
| <a href=#469 id=469 data-nosnippet>469</a>use std::collections::<fold block>{ |
| <a href=#470 id=470 data-nosnippet>470</a> HashMap, |
| <a href=#471 id=471 data-nosnippet>471</a> VecDeque, |
| <a href=#472 id=472 data-nosnippet>472</a>}</fold>; |
| <a href=#473 id=473 data-nosnippet>473</a>// Some random comment |
| <a href=#474 id=474 data-nosnippet>474</a>"#</span>, |
| <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> |
| <a href=#478 id=478 data-nosnippet>478</a> <span class="attr">#[test] |
| <a href=#479 id=479 data-nosnippet>479</a> </span><span class="kw">fn </span>test_folds_structs() { |
| <a href=#480 id=480 data-nosnippet>480</a> check( |
| <a href=#481 id=481 data-nosnippet>481</a> <span class="string">r#" |
| <a href=#482 id=482 data-nosnippet>482</a>struct Foo <fold block>{ |
| <a href=#483 id=483 data-nosnippet>483</a>}</fold> |
| <a href=#484 id=484 data-nosnippet>484</a>"#</span>, |
| <a href=#485 id=485 data-nosnippet>485</a> ); |
| <a href=#486 id=486 data-nosnippet>486</a> } |
| <a href=#487 id=487 data-nosnippet>487</a> |
| <a href=#488 id=488 data-nosnippet>488</a> <span class="attr">#[test] |
| <a href=#489 id=489 data-nosnippet>489</a> </span><span class="kw">fn </span>test_folds_traits() { |
| <a href=#490 id=490 data-nosnippet>490</a> check( |
| <a href=#491 id=491 data-nosnippet>491</a> <span class="string">r#" |
| <a href=#492 id=492 data-nosnippet>492</a>trait Foo <fold block>{ |
| <a href=#493 id=493 data-nosnippet>493</a>}</fold> |
| <a href=#494 id=494 data-nosnippet>494</a>"#</span>, |
| <a href=#495 id=495 data-nosnippet>495</a> ); |
| <a href=#496 id=496 data-nosnippet>496</a> } |
| <a href=#497 id=497 data-nosnippet>497</a> |
| <a href=#498 id=498 data-nosnippet>498</a> <span class="attr">#[test] |
| <a href=#499 id=499 data-nosnippet>499</a> </span><span class="kw">fn </span>test_folds_macros() { |
| <a href=#500 id=500 data-nosnippet>500</a> check( |
| <a href=#501 id=501 data-nosnippet>501</a> <span class="string">r#" |
| <a href=#502 id=502 data-nosnippet>502</a>macro_rules! foo <fold block>{ |
| <a href=#503 id=503 data-nosnippet>503</a> ($($tt:tt)*) => { $($tt)* } |
| <a href=#504 id=504 data-nosnippet>504</a>}</fold> |
| <a href=#505 id=505 data-nosnippet>505</a>"#</span>, |
| <a href=#506 id=506 data-nosnippet>506</a> ); |
| <a href=#507 id=507 data-nosnippet>507</a> } |
| <a href=#508 id=508 data-nosnippet>508</a> |
| <a href=#509 id=509 data-nosnippet>509</a> <span class="attr">#[test] |
| <a href=#510 id=510 data-nosnippet>510</a> </span><span class="kw">fn </span>test_fold_match_arms() { |
| <a href=#511 id=511 data-nosnippet>511</a> check( |
| <a href=#512 id=512 data-nosnippet>512</a> <span class="string">r#" |
| <a href=#513 id=513 data-nosnippet>513</a>fn main() <fold block>{ |
| <a href=#514 id=514 data-nosnippet>514</a> match 0 <fold block>{ |
| <a href=#515 id=515 data-nosnippet>515</a> 0 => 0, |
| <a href=#516 id=516 data-nosnippet>516</a> _ => 1, |
| <a href=#517 id=517 data-nosnippet>517</a> }</fold> |
| <a href=#518 id=518 data-nosnippet>518</a>}</fold> |
| <a href=#519 id=519 data-nosnippet>519</a>"#</span>, |
| <a href=#520 id=520 data-nosnippet>520</a> ); |
| <a href=#521 id=521 data-nosnippet>521</a> } |
| <a href=#522 id=522 data-nosnippet>522</a> |
| <a href=#523 id=523 data-nosnippet>523</a> <span class="attr">#[test] |
| <a href=#524 id=524 data-nosnippet>524</a> </span><span class="kw">fn </span>test_fold_multiline_non_block_match_arm() { |
| <a href=#525 id=525 data-nosnippet>525</a> check( |
| <a href=#526 id=526 data-nosnippet>526</a> <span class="string">r#" |
| <a href=#527 id=527 data-nosnippet>527</a> fn main() <fold block>{ |
| <a href=#528 id=528 data-nosnippet>528</a> match foo <fold block>{ |
| <a href=#529 id=529 data-nosnippet>529</a> block => <fold block>{ |
| <a href=#530 id=530 data-nosnippet>530</a> }</fold>, |
| <a href=#531 id=531 data-nosnippet>531</a> matcharm => <fold matcharm>some. |
| <a href=#532 id=532 data-nosnippet>532</a> call(). |
| <a href=#533 id=533 data-nosnippet>533</a> chain()</fold>, |
| <a href=#534 id=534 data-nosnippet>534</a> matcharm2 |
| <a href=#535 id=535 data-nosnippet>535</a> => 0, |
| <a href=#536 id=536 data-nosnippet>536</a> match_expr => <fold matcharm>match foo2 <fold block>{ |
| <a href=#537 id=537 data-nosnippet>537</a> bar => (), |
| <a href=#538 id=538 data-nosnippet>538</a> }</fold></fold>, |
| <a href=#539 id=539 data-nosnippet>539</a> array_list => <fold array>[ |
| <a href=#540 id=540 data-nosnippet>540</a> 1, |
| <a href=#541 id=541 data-nosnippet>541</a> 2, |
| <a href=#542 id=542 data-nosnippet>542</a> 3, |
| <a href=#543 id=543 data-nosnippet>543</a> ]</fold>, |
| <a href=#544 id=544 data-nosnippet>544</a> structS => <fold matcharm>StructS <fold block>{ |
| <a href=#545 id=545 data-nosnippet>545</a> a: 31, |
| <a href=#546 id=546 data-nosnippet>546</a> }</fold></fold>, |
| <a href=#547 id=547 data-nosnippet>547</a> }</fold> |
| <a href=#548 id=548 data-nosnippet>548</a> }</fold> |
| <a href=#549 id=549 data-nosnippet>549</a> "#</span>, |
| <a href=#550 id=550 data-nosnippet>550</a> ) |
| <a href=#551 id=551 data-nosnippet>551</a> } |
| <a href=#552 id=552 data-nosnippet>552</a> |
| <a href=#553 id=553 data-nosnippet>553</a> <span class="attr">#[test] |
| <a href=#554 id=554 data-nosnippet>554</a> </span><span class="kw">fn </span>fold_big_calls() { |
| <a href=#555 id=555 data-nosnippet>555</a> check( |
| <a href=#556 id=556 data-nosnippet>556</a> <span class="string">r#" |
| <a href=#557 id=557 data-nosnippet>557</a>fn main() <fold block>{ |
| <a href=#558 id=558 data-nosnippet>558</a> frobnicate<fold arglist>( |
| <a href=#559 id=559 data-nosnippet>559</a> 1, |
| <a href=#560 id=560 data-nosnippet>560</a> 2, |
| <a href=#561 id=561 data-nosnippet>561</a> 3, |
| <a href=#562 id=562 data-nosnippet>562</a> )</fold> |
| <a href=#563 id=563 data-nosnippet>563</a>}</fold> |
| <a href=#564 id=564 data-nosnippet>564</a>"#</span>, |
| <a href=#565 id=565 data-nosnippet>565</a> ) |
| <a href=#566 id=566 data-nosnippet>566</a> } |
| <a href=#567 id=567 data-nosnippet>567</a> |
| <a href=#568 id=568 data-nosnippet>568</a> <span class="attr">#[test] |
| <a href=#569 id=569 data-nosnippet>569</a> </span><span class="kw">fn </span>fold_record_literals() { |
| <a href=#570 id=570 data-nosnippet>570</a> check( |
| <a href=#571 id=571 data-nosnippet>571</a> <span class="string">r#" |
| <a href=#572 id=572 data-nosnippet>572</a>const _: S = S <fold block>{ |
| <a href=#573 id=573 data-nosnippet>573</a> |
| <a href=#574 id=574 data-nosnippet>574</a>}</fold>; |
| <a href=#575 id=575 data-nosnippet>575</a>"#</span>, |
| <a href=#576 id=576 data-nosnippet>576</a> ) |
| <a href=#577 id=577 data-nosnippet>577</a> } |
| <a href=#578 id=578 data-nosnippet>578</a> |
| <a href=#579 id=579 data-nosnippet>579</a> <span class="attr">#[test] |
| <a href=#580 id=580 data-nosnippet>580</a> </span><span class="kw">fn </span>fold_multiline_params() { |
| <a href=#581 id=581 data-nosnippet>581</a> check( |
| <a href=#582 id=582 data-nosnippet>582</a> <span class="string">r#" |
| <a href=#583 id=583 data-nosnippet>583</a><fold function>fn foo<fold arglist>( |
| <a href=#584 id=584 data-nosnippet>584</a> x: i32, |
| <a href=#585 id=585 data-nosnippet>585</a> y: String, |
| <a href=#586 id=586 data-nosnippet>586</a>)</fold> {}</fold> |
| <a href=#587 id=587 data-nosnippet>587</a>"#</span>, |
| <a href=#588 id=588 data-nosnippet>588</a> ) |
| <a href=#589 id=589 data-nosnippet>589</a> } |
| <a href=#590 id=590 data-nosnippet>590</a> |
| <a href=#591 id=591 data-nosnippet>591</a> <span class="attr">#[test] |
| <a href=#592 id=592 data-nosnippet>592</a> </span><span class="kw">fn </span>fold_multiline_array() { |
| <a href=#593 id=593 data-nosnippet>593</a> check( |
| <a href=#594 id=594 data-nosnippet>594</a> <span class="string">r#" |
| <a href=#595 id=595 data-nosnippet>595</a>const FOO: [usize; 4] = <fold array>[ |
| <a href=#596 id=596 data-nosnippet>596</a> 1, |
| <a href=#597 id=597 data-nosnippet>597</a> 2, |
| <a href=#598 id=598 data-nosnippet>598</a> 3, |
| <a href=#599 id=599 data-nosnippet>599</a> 4, |
| <a href=#600 id=600 data-nosnippet>600</a>]</fold>; |
| <a href=#601 id=601 data-nosnippet>601</a>"#</span>, |
| <a href=#602 id=602 data-nosnippet>602</a> ) |
| <a href=#603 id=603 data-nosnippet>603</a> } |
| <a href=#604 id=604 data-nosnippet>604</a> |
| <a href=#605 id=605 data-nosnippet>605</a> <span class="attr">#[test] |
| <a href=#606 id=606 data-nosnippet>606</a> </span><span class="kw">fn </span>fold_region() { |
| <a href=#607 id=607 data-nosnippet>607</a> check( |
| <a href=#608 id=608 data-nosnippet>608</a> <span class="string">r#" |
| <a href=#609 id=609 data-nosnippet>609</a>// 1. some normal comment |
| <a href=#610 id=610 data-nosnippet>610</a><fold region>// region: test |
| <a href=#611 id=611 data-nosnippet>611</a>// 2. some normal comment |
| <a href=#612 id=612 data-nosnippet>612</a><fold region>// region: inner |
| <a href=#613 id=613 data-nosnippet>613</a>fn f() {} |
| <a href=#614 id=614 data-nosnippet>614</a>// endregion</fold> |
| <a href=#615 id=615 data-nosnippet>615</a>fn f2() {} |
| <a href=#616 id=616 data-nosnippet>616</a>// endregion: test</fold> |
| <a href=#617 id=617 data-nosnippet>617</a>"#</span>, |
| <a href=#618 id=618 data-nosnippet>618</a> ) |
| <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> <span class="attr">#[test] |
| <a href=#622 id=622 data-nosnippet>622</a> </span><span class="kw">fn </span>fold_consecutive_const() { |
| <a href=#623 id=623 data-nosnippet>623</a> check( |
| <a href=#624 id=624 data-nosnippet>624</a> <span class="string">r#" |
| <a href=#625 id=625 data-nosnippet>625</a><fold consts>const FIRST_CONST: &str = "first"; |
| <a href=#626 id=626 data-nosnippet>626</a>const SECOND_CONST: &str = "second";</fold> |
| <a href=#627 id=627 data-nosnippet>627</a>"#</span>, |
| <a href=#628 id=628 data-nosnippet>628</a> ) |
| <a href=#629 id=629 data-nosnippet>629</a> } |
| <a href=#630 id=630 data-nosnippet>630</a> |
| <a href=#631 id=631 data-nosnippet>631</a> <span class="attr">#[test] |
| <a href=#632 id=632 data-nosnippet>632</a> </span><span class="kw">fn </span>fold_consecutive_static() { |
| <a href=#633 id=633 data-nosnippet>633</a> check( |
| <a href=#634 id=634 data-nosnippet>634</a> <span class="string">r#" |
| <a href=#635 id=635 data-nosnippet>635</a><fold statics>static FIRST_STATIC: &str = "first"; |
| <a href=#636 id=636 data-nosnippet>636</a>static SECOND_STATIC: &str = "second";</fold> |
| <a href=#637 id=637 data-nosnippet>637</a>"#</span>, |
| <a href=#638 id=638 data-nosnippet>638</a> ) |
| <a href=#639 id=639 data-nosnippet>639</a> } |
| <a href=#640 id=640 data-nosnippet>640</a> |
| <a href=#641 id=641 data-nosnippet>641</a> <span class="attr">#[test] |
| <a href=#642 id=642 data-nosnippet>642</a> </span><span class="kw">fn </span>fold_where_clause() { |
| <a href=#643 id=643 data-nosnippet>643</a> check( |
| <a href=#644 id=644 data-nosnippet>644</a> <span class="string">r#" |
| <a href=#645 id=645 data-nosnippet>645</a>fn foo() |
| <a href=#646 id=646 data-nosnippet>646</a><fold whereclause>where |
| <a href=#647 id=647 data-nosnippet>647</a> A: Foo, |
| <a href=#648 id=648 data-nosnippet>648</a> B: Foo, |
| <a href=#649 id=649 data-nosnippet>649</a> C: Foo, |
| <a href=#650 id=650 data-nosnippet>650</a> D: Foo,</fold> {} |
| <a href=#651 id=651 data-nosnippet>651</a> |
| <a href=#652 id=652 data-nosnippet>652</a>fn bar() |
| <a href=#653 id=653 data-nosnippet>653</a><fold whereclause>where |
| <a href=#654 id=654 data-nosnippet>654</a> A: Bar,</fold> {} |
| <a href=#655 id=655 data-nosnippet>655</a>"#</span>, |
| <a href=#656 id=656 data-nosnippet>656</a> ) |
| <a href=#657 id=657 data-nosnippet>657</a> } |
| <a href=#658 id=658 data-nosnippet>658</a> |
| <a href=#659 id=659 data-nosnippet>659</a> <span class="attr">#[test] |
| <a href=#660 id=660 data-nosnippet>660</a> </span><span class="kw">fn </span>fold_return_type() { |
| <a href=#661 id=661 data-nosnippet>661</a> check( |
| <a href=#662 id=662 data-nosnippet>662</a> <span class="string">r#" |
| <a href=#663 id=663 data-nosnippet>663</a>fn foo()<fold returntype>-> ( |
| <a href=#664 id=664 data-nosnippet>664</a> bool, |
| <a href=#665 id=665 data-nosnippet>665</a> bool, |
| <a href=#666 id=666 data-nosnippet>666</a>)</fold> { (true, true) } |
| <a href=#667 id=667 data-nosnippet>667</a> |
| <a href=#668 id=668 data-nosnippet>668</a>fn bar() -> (bool, bool) { (true, true) } |
| <a href=#669 id=669 data-nosnippet>669</a>"#</span>, |
| <a href=#670 id=670 data-nosnippet>670</a> ) |
| <a href=#671 id=671 data-nosnippet>671</a> } |
| <a href=#672 id=672 data-nosnippet>672</a> |
| <a href=#673 id=673 data-nosnippet>673</a> <span class="attr">#[test] |
| <a href=#674 id=674 data-nosnippet>674</a> </span><span class="kw">fn </span>fold_generics() { |
| <a href=#675 id=675 data-nosnippet>675</a> check( |
| <a href=#676 id=676 data-nosnippet>676</a> <span class="string">r#" |
| <a href=#677 id=677 data-nosnippet>677</a>type Foo<T, U> = foo<fold arglist>< |
| <a href=#678 id=678 data-nosnippet>678</a> T, |
| <a href=#679 id=679 data-nosnippet>679</a> U, |
| <a href=#680 id=680 data-nosnippet>680</a>></fold>; |
| <a href=#681 id=681 data-nosnippet>681</a>"#</span>, |
| <a href=#682 id=682 data-nosnippet>682</a> ) |
| <a href=#683 id=683 data-nosnippet>683</a> } |
| <a href=#684 id=684 data-nosnippet>684</a> |
| <a href=#685 id=685 data-nosnippet>685</a> <span class="attr">#[test] |
| <a href=#686 id=686 data-nosnippet>686</a> </span><span class="kw">fn </span>test_fold_doc_comments_with_multiline_paramlist_function() { |
| <a href=#687 id=687 data-nosnippet>687</a> check( |
| <a href=#688 id=688 data-nosnippet>688</a> <span class="string">r#" |
| <a href=#689 id=689 data-nosnippet>689</a><fold comment>/// A very very very very very very very very very very very very very very very |
| <a href=#690 id=690 data-nosnippet>690</a>/// very very very long description</fold> |
| <a href=#691 id=691 data-nosnippet>691</a><fold function>fn foo<fold arglist>( |
| <a href=#692 id=692 data-nosnippet>692</a> very_long_parameter_name: u32, |
| <a href=#693 id=693 data-nosnippet>693</a> another_very_long_parameter_name: u32, |
| <a href=#694 id=694 data-nosnippet>694</a> third_very_long_param: u32, |
| <a href=#695 id=695 data-nosnippet>695</a>)</fold> <fold block>{ |
| <a href=#696 id=696 data-nosnippet>696</a> todo!() |
| <a href=#697 id=697 data-nosnippet>697</a>}</fold></fold> |
| <a href=#698 id=698 data-nosnippet>698</a>"#</span>, |
| <a href=#699 id=699 data-nosnippet>699</a> ); |
| <a href=#700 id=700 data-nosnippet>700</a> } |
| <a href=#701 id=701 data-nosnippet>701</a>} |
| </code></pre></div></section></main></body></html> |
