| <!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/syntax/src/ast/edit.rs`."><title>edit.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="syntax" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.0 (254b59607 2026-01-19)" data-channel="1.93.0" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.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-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">syntax/ast/</div>edit.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! This module contains functions for editing syntax trees. As the trees are |
| <a href=#2 id=2 data-nosnippet>2</a>//! immutable, all function here return a fresh copy of the tree, instead of |
| <a href=#3 id=3 data-nosnippet>3</a>//! doing an in-place modification. |
| <a href=#4 id=4 data-nosnippet>4</a></span><span class="kw">use </span>std::{fmt, iter, ops}; |
| <a href=#5 id=5 data-nosnippet>5</a> |
| <a href=#6 id=6 data-nosnippet>6</a><span class="kw">use crate</span>::{ |
| <a href=#7 id=7 data-nosnippet>7</a> AstToken, NodeOrToken, SyntaxElement, SyntaxNode, SyntaxToken, |
| <a href=#8 id=8 data-nosnippet>8</a> ast::{<span class="self">self</span>, AstNode, make}, |
| <a href=#9 id=9 data-nosnippet>9</a> syntax_editor::{SyntaxEditor, SyntaxMappingBuilder}, |
| <a href=#10 id=10 data-nosnippet>10</a> ted, |
| <a href=#11 id=11 data-nosnippet>11</a>}; |
| <a href=#12 id=12 data-nosnippet>12</a> |
| <a href=#13 id=13 data-nosnippet>13</a><span class="kw">use </span><span class="kw">super</span>::syntax_factory::SyntaxFactory; |
| <a href=#14 id=14 data-nosnippet>14</a> |
| <a href=#15 id=15 data-nosnippet>15</a><span class="attr">#[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| <a href=#16 id=16 data-nosnippet>16</a></span><span class="kw">pub struct </span>IndentLevel(<span class="kw">pub </span>u8); |
| <a href=#17 id=17 data-nosnippet>17</a> |
| <a href=#18 id=18 data-nosnippet>18</a><span class="kw">impl </span>From<u8> <span class="kw">for </span>IndentLevel { |
| <a href=#19 id=19 data-nosnippet>19</a> <span class="kw">fn </span>from(level: u8) -> IndentLevel { |
| <a href=#20 id=20 data-nosnippet>20</a> IndentLevel(level) |
| <a href=#21 id=21 data-nosnippet>21</a> } |
| <a href=#22 id=22 data-nosnippet>22</a>} |
| <a href=#23 id=23 data-nosnippet>23</a> |
| <a href=#24 id=24 data-nosnippet>24</a><span class="kw">impl </span>fmt::Display <span class="kw">for </span>IndentLevel { |
| <a href=#25 id=25 data-nosnippet>25</a> <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <a href=#26 id=26 data-nosnippet>26</a> <span class="kw">let </span>spaces = <span class="string">" "</span>; |
| <a href=#27 id=27 data-nosnippet>27</a> <span class="kw">let </span>buf; |
| <a href=#28 id=28 data-nosnippet>28</a> <span class="kw">let </span>len = <span class="self">self</span>.<span class="number">0 </span><span class="kw">as </span>usize * <span class="number">4</span>; |
| <a href=#29 id=29 data-nosnippet>29</a> <span class="kw">let </span>indent = <span class="kw">if </span>len <= spaces.len() { |
| <a href=#30 id=30 data-nosnippet>30</a> <span class="kw-2">&</span>spaces[..len] |
| <a href=#31 id=31 data-nosnippet>31</a> } <span class="kw">else </span>{ |
| <a href=#32 id=32 data-nosnippet>32</a> buf = <span class="string">" "</span>.repeat(len); |
| <a href=#33 id=33 data-nosnippet>33</a> <span class="kw-2">&</span>buf |
| <a href=#34 id=34 data-nosnippet>34</a> }; |
| <a href=#35 id=35 data-nosnippet>35</a> fmt::Display::fmt(indent, f) |
| <a href=#36 id=36 data-nosnippet>36</a> } |
| <a href=#37 id=37 data-nosnippet>37</a>} |
| <a href=#38 id=38 data-nosnippet>38</a> |
| <a href=#39 id=39 data-nosnippet>39</a><span class="kw">impl </span>ops::Add<u8> <span class="kw">for </span>IndentLevel { |
| <a href=#40 id=40 data-nosnippet>40</a> <span class="kw">type </span>Output = IndentLevel; |
| <a href=#41 id=41 data-nosnippet>41</a> <span class="kw">fn </span>add(<span class="self">self</span>, rhs: u8) -> IndentLevel { |
| <a href=#42 id=42 data-nosnippet>42</a> IndentLevel(<span class="self">self</span>.<span class="number">0 </span>+ rhs) |
| <a href=#43 id=43 data-nosnippet>43</a> } |
| <a href=#44 id=44 data-nosnippet>44</a>} |
| <a href=#45 id=45 data-nosnippet>45</a> |
| <a href=#46 id=46 data-nosnippet>46</a><span class="kw">impl </span>IndentLevel { |
| <a href=#47 id=47 data-nosnippet>47</a> <span class="kw">pub fn </span>single() -> IndentLevel { |
| <a href=#48 id=48 data-nosnippet>48</a> IndentLevel(<span class="number">0</span>) |
| <a href=#49 id=49 data-nosnippet>49</a> } |
| <a href=#50 id=50 data-nosnippet>50</a> <span class="kw">pub fn </span>is_zero(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <a href=#51 id=51 data-nosnippet>51</a> <span class="self">self</span>.<span class="number">0 </span>== <span class="number">0 |
| <a href=#52 id=52 data-nosnippet>52</a> </span>} |
| <a href=#53 id=53 data-nosnippet>53</a> <span class="kw">pub fn </span>from_element(element: <span class="kw-2">&</span>SyntaxElement) -> IndentLevel { |
| <a href=#54 id=54 data-nosnippet>54</a> <span class="kw">match </span>element { |
| <a href=#55 id=55 data-nosnippet>55</a> rowan::NodeOrToken::Node(it) => IndentLevel::from_node(it), |
| <a href=#56 id=56 data-nosnippet>56</a> rowan::NodeOrToken::Token(it) => IndentLevel::from_token(it), |
| <a href=#57 id=57 data-nosnippet>57</a> } |
| <a href=#58 id=58 data-nosnippet>58</a> } |
| <a href=#59 id=59 data-nosnippet>59</a> |
| <a href=#60 id=60 data-nosnippet>60</a> <span class="kw">pub fn </span>from_node(node: <span class="kw-2">&</span>SyntaxNode) -> IndentLevel { |
| <a href=#61 id=61 data-nosnippet>61</a> <span class="kw">match </span>node.first_token() { |
| <a href=#62 id=62 data-nosnippet>62</a> <span class="prelude-val">Some</span>(it) => <span class="self">Self</span>::from_token(<span class="kw-2">&</span>it), |
| <a href=#63 id=63 data-nosnippet>63</a> <span class="prelude-val">None </span>=> IndentLevel(<span class="number">0</span>), |
| <a href=#64 id=64 data-nosnippet>64</a> } |
| <a href=#65 id=65 data-nosnippet>65</a> } |
| <a href=#66 id=66 data-nosnippet>66</a> |
| <a href=#67 id=67 data-nosnippet>67</a> <span class="kw">pub fn </span>from_token(token: <span class="kw-2">&</span>SyntaxToken) -> IndentLevel { |
| <a href=#68 id=68 data-nosnippet>68</a> <span class="kw">for </span>ws <span class="kw">in </span>prev_tokens(token.clone()).filter_map(ast::Whitespace::cast) { |
| <a href=#69 id=69 data-nosnippet>69</a> <span class="kw">let </span>text = ws.syntax().text(); |
| <a href=#70 id=70 data-nosnippet>70</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(pos) = text.rfind(<span class="string">'\n'</span>) { |
| <a href=#71 id=71 data-nosnippet>71</a> <span class="kw">let </span>level = text[pos + <span class="number">1</span>..].chars().count() / <span class="number">4</span>; |
| <a href=#72 id=72 data-nosnippet>72</a> <span class="kw">return </span>IndentLevel(level <span class="kw">as </span>u8); |
| <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> IndentLevel(<span class="number">0</span>) |
| <a href=#76 id=76 data-nosnippet>76</a> } |
| <a href=#77 id=77 data-nosnippet>77</a> |
| <a href=#78 id=78 data-nosnippet>78</a> <span class="doccomment">/// XXX: this intentionally doesn't change the indent of the very first token. |
| <a href=#79 id=79 data-nosnippet>79</a> /// For example, in something like: |
| <a href=#80 id=80 data-nosnippet>80</a> /// ``` |
| <a href=#81 id=81 data-nosnippet>81</a> /// fn foo() -> i32 { |
| <a href=#82 id=82 data-nosnippet>82</a> /// 92 |
| <a href=#83 id=83 data-nosnippet>83</a> /// } |
| <a href=#84 id=84 data-nosnippet>84</a> /// ``` |
| <a href=#85 id=85 data-nosnippet>85</a> /// if you indent the block, the `{` token would stay put. |
| <a href=#86 id=86 data-nosnippet>86</a> </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>increase_indent(<span class="self">self</span>, node: <span class="kw-2">&</span>SyntaxNode) { |
| <a href=#87 id=87 data-nosnippet>87</a> <span class="kw">let </span>tokens = node.preorder_with_tokens().filter_map(|event| <span class="kw">match </span>event { |
| <a href=#88 id=88 data-nosnippet>88</a> rowan::WalkEvent::Leave(NodeOrToken::Token(it)) => <span class="prelude-val">Some</span>(it), |
| <a href=#89 id=89 data-nosnippet>89</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#90 id=90 data-nosnippet>90</a> }); |
| <a href=#91 id=91 data-nosnippet>91</a> <span class="kw">for </span>token <span class="kw">in </span>tokens { |
| <a href=#92 id=92 data-nosnippet>92</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(ws) = ast::Whitespace::cast(token) |
| <a href=#93 id=93 data-nosnippet>93</a> && ws.text().contains(<span class="string">'\n'</span>) |
| <a href=#94 id=94 data-nosnippet>94</a> { |
| <a href=#95 id=95 data-nosnippet>95</a> <span class="kw">let </span>new_ws = make::tokens::whitespace(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"{}{self}"</span>, ws.syntax())); |
| <a href=#96 id=96 data-nosnippet>96</a> ted::replace(ws.syntax(), <span class="kw-2">&</span>new_ws); |
| <a href=#97 id=97 data-nosnippet>97</a> } |
| <a href=#98 id=98 data-nosnippet>98</a> } |
| <a href=#99 id=99 data-nosnippet>99</a> } |
| <a href=#100 id=100 data-nosnippet>100</a> |
| <a href=#101 id=101 data-nosnippet>101</a> <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>clone_increase_indent(<span class="self">self</span>, node: <span class="kw-2">&</span>SyntaxNode) -> SyntaxNode { |
| <a href=#102 id=102 data-nosnippet>102</a> <span class="kw">let </span>node = node.clone_subtree(); |
| <a href=#103 id=103 data-nosnippet>103</a> <span class="kw">let </span><span class="kw-2">mut </span>editor = SyntaxEditor::new(node.clone()); |
| <a href=#104 id=104 data-nosnippet>104</a> <span class="kw">let </span>tokens = node |
| <a href=#105 id=105 data-nosnippet>105</a> .preorder_with_tokens() |
| <a href=#106 id=106 data-nosnippet>106</a> .filter_map(|event| <span class="kw">match </span>event { |
| <a href=#107 id=107 data-nosnippet>107</a> rowan::WalkEvent::Leave(NodeOrToken::Token(it)) => <span class="prelude-val">Some</span>(it), |
| <a href=#108 id=108 data-nosnippet>108</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#109 id=109 data-nosnippet>109</a> }) |
| <a href=#110 id=110 data-nosnippet>110</a> .filter_map(ast::Whitespace::cast) |
| <a href=#111 id=111 data-nosnippet>111</a> .filter(|ws| ws.text().contains(<span class="string">'\n'</span>)); |
| <a href=#112 id=112 data-nosnippet>112</a> <span class="kw">for </span>ws <span class="kw">in </span>tokens { |
| <a href=#113 id=113 data-nosnippet>113</a> <span class="kw">let </span>new_ws = make::tokens::whitespace(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"{}{self}"</span>, ws.syntax())); |
| <a href=#114 id=114 data-nosnippet>114</a> editor.replace(ws.syntax(), <span class="kw-2">&</span>new_ws); |
| <a href=#115 id=115 data-nosnippet>115</a> } |
| <a href=#116 id=116 data-nosnippet>116</a> editor.finish().new_root().clone() |
| <a href=#117 id=117 data-nosnippet>117</a> } |
| <a href=#118 id=118 data-nosnippet>118</a> |
| <a href=#119 id=119 data-nosnippet>119</a> <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>decrease_indent(<span class="self">self</span>, node: <span class="kw-2">&</span>SyntaxNode) { |
| <a href=#120 id=120 data-nosnippet>120</a> <span class="kw">let </span>tokens = node.preorder_with_tokens().filter_map(|event| <span class="kw">match </span>event { |
| <a href=#121 id=121 data-nosnippet>121</a> rowan::WalkEvent::Leave(NodeOrToken::Token(it)) => <span class="prelude-val">Some</span>(it), |
| <a href=#122 id=122 data-nosnippet>122</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#123 id=123 data-nosnippet>123</a> }); |
| <a href=#124 id=124 data-nosnippet>124</a> <span class="kw">for </span>token <span class="kw">in </span>tokens { |
| <a href=#125 id=125 data-nosnippet>125</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(ws) = ast::Whitespace::cast(token) |
| <a href=#126 id=126 data-nosnippet>126</a> && ws.text().contains(<span class="string">'\n'</span>) |
| <a href=#127 id=127 data-nosnippet>127</a> { |
| <a href=#128 id=128 data-nosnippet>128</a> <span class="kw">let </span>new_ws = make::tokens::whitespace( |
| <a href=#129 id=129 data-nosnippet>129</a> <span class="kw-2">&</span>ws.syntax().text().replace(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"\n{self}"</span>), <span class="string">"\n"</span>), |
| <a href=#130 id=130 data-nosnippet>130</a> ); |
| <a href=#131 id=131 data-nosnippet>131</a> ted::replace(ws.syntax(), <span class="kw-2">&</span>new_ws); |
| <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> } |
| <a href=#135 id=135 data-nosnippet>135</a> |
| <a href=#136 id=136 data-nosnippet>136</a> <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>clone_decrease_indent(<span class="self">self</span>, node: <span class="kw-2">&</span>SyntaxNode) -> SyntaxNode { |
| <a href=#137 id=137 data-nosnippet>137</a> <span class="kw">let </span>node = node.clone_subtree(); |
| <a href=#138 id=138 data-nosnippet>138</a> <span class="kw">let </span><span class="kw-2">mut </span>editor = SyntaxEditor::new(node.clone()); |
| <a href=#139 id=139 data-nosnippet>139</a> <span class="kw">let </span>tokens = node |
| <a href=#140 id=140 data-nosnippet>140</a> .preorder_with_tokens() |
| <a href=#141 id=141 data-nosnippet>141</a> .filter_map(|event| <span class="kw">match </span>event { |
| <a href=#142 id=142 data-nosnippet>142</a> rowan::WalkEvent::Leave(NodeOrToken::Token(it)) => <span class="prelude-val">Some</span>(it), |
| <a href=#143 id=143 data-nosnippet>143</a> <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| <a href=#144 id=144 data-nosnippet>144</a> }) |
| <a href=#145 id=145 data-nosnippet>145</a> .filter_map(ast::Whitespace::cast) |
| <a href=#146 id=146 data-nosnippet>146</a> .filter(|ws| ws.text().contains(<span class="string">'\n'</span>)); |
| <a href=#147 id=147 data-nosnippet>147</a> <span class="kw">for </span>ws <span class="kw">in </span>tokens { |
| <a href=#148 id=148 data-nosnippet>148</a> <span class="kw">let </span>new_ws = |
| <a href=#149 id=149 data-nosnippet>149</a> make::tokens::whitespace(<span class="kw-2">&</span>ws.syntax().text().replace(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"\n{self}"</span>), <span class="string">"\n"</span>)); |
| <a href=#150 id=150 data-nosnippet>150</a> editor.replace(ws.syntax(), <span class="kw-2">&</span>new_ws); |
| <a href=#151 id=151 data-nosnippet>151</a> } |
| <a href=#152 id=152 data-nosnippet>152</a> editor.finish().new_root().clone() |
| <a href=#153 id=153 data-nosnippet>153</a> } |
| <a href=#154 id=154 data-nosnippet>154</a>} |
| <a href=#155 id=155 data-nosnippet>155</a> |
| <a href=#156 id=156 data-nosnippet>156</a><span class="kw">fn </span>prev_tokens(token: SyntaxToken) -> <span class="kw">impl </span>Iterator<Item = SyntaxToken> { |
| <a href=#157 id=157 data-nosnippet>157</a> iter::successors(<span class="prelude-val">Some</span>(token), |token| token.prev_token()) |
| <a href=#158 id=158 data-nosnippet>158</a>} |
| <a href=#159 id=159 data-nosnippet>159</a> |
| <a href=#160 id=160 data-nosnippet>160</a><span class="kw">pub trait </span>AstNodeEdit: AstNode + Clone + Sized { |
| <a href=#161 id=161 data-nosnippet>161</a> <span class="kw">fn </span>indent_level(<span class="kw-2">&</span><span class="self">self</span>) -> IndentLevel { |
| <a href=#162 id=162 data-nosnippet>162</a> IndentLevel::from_node(<span class="self">self</span>.syntax()) |
| <a href=#163 id=163 data-nosnippet>163</a> } |
| <a href=#164 id=164 data-nosnippet>164</a> <span class="attr">#[must_use] |
| <a href=#165 id=165 data-nosnippet>165</a> </span><span class="kw">fn </span>indent(<span class="kw-2">&</span><span class="self">self</span>, level: IndentLevel) -> <span class="self">Self </span>{ |
| <a href=#166 id=166 data-nosnippet>166</a> <span class="self">Self</span>::cast(level.clone_increase_indent(<span class="self">self</span>.syntax())).unwrap() |
| <a href=#167 id=167 data-nosnippet>167</a> } |
| <a href=#168 id=168 data-nosnippet>168</a> <span class="attr">#[must_use] |
| <a href=#169 id=169 data-nosnippet>169</a> </span><span class="kw">fn </span>indent_with_mapping(<span class="kw-2">&</span><span class="self">self</span>, level: IndentLevel, make: <span class="kw-2">&</span>SyntaxFactory) -> <span class="self">Self </span>{ |
| <a href=#170 id=170 data-nosnippet>170</a> <span class="kw">let </span>new_node = <span class="self">self</span>.indent(level); |
| <a href=#171 id=171 data-nosnippet>171</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">mut </span>mapping) = make.mappings() { |
| <a href=#172 id=172 data-nosnippet>172</a> <span class="kw">let </span><span class="kw-2">mut </span>builder = SyntaxMappingBuilder::new(new_node.syntax().clone()); |
| <a href=#173 id=173 data-nosnippet>173</a> <span class="kw">for </span>(old, new) <span class="kw">in </span><span class="self">self</span>.syntax().children().zip(new_node.syntax().children()) { |
| <a href=#174 id=174 data-nosnippet>174</a> builder.map_node(old, new); |
| <a href=#175 id=175 data-nosnippet>175</a> } |
| <a href=#176 id=176 data-nosnippet>176</a> builder.finish(<span class="kw-2">&mut </span>mapping); |
| <a href=#177 id=177 data-nosnippet>177</a> } |
| <a href=#178 id=178 data-nosnippet>178</a> new_node |
| <a href=#179 id=179 data-nosnippet>179</a> } |
| <a href=#180 id=180 data-nosnippet>180</a> <span class="attr">#[must_use] |
| <a href=#181 id=181 data-nosnippet>181</a> </span><span class="kw">fn </span>dedent(<span class="kw-2">&</span><span class="self">self</span>, level: IndentLevel) -> <span class="self">Self </span>{ |
| <a href=#182 id=182 data-nosnippet>182</a> <span class="self">Self</span>::cast(level.clone_decrease_indent(<span class="self">self</span>.syntax())).unwrap() |
| <a href=#183 id=183 data-nosnippet>183</a> } |
| <a href=#184 id=184 data-nosnippet>184</a> <span class="attr">#[must_use] |
| <a href=#185 id=185 data-nosnippet>185</a> </span><span class="kw">fn </span>reset_indent(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <a href=#186 id=186 data-nosnippet>186</a> <span class="kw">let </span>level = IndentLevel::from_node(<span class="self">self</span>.syntax()); |
| <a href=#187 id=187 data-nosnippet>187</a> <span class="self">self</span>.dedent(level) |
| <a href=#188 id=188 data-nosnippet>188</a> } |
| <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><span class="kw">impl</span><N: AstNode + Clone> AstNodeEdit <span class="kw">for </span>N {} |
| <a href=#192 id=192 data-nosnippet>192</a> |
| <a href=#193 id=193 data-nosnippet>193</a><span class="attr">#[test] |
| <a href=#194 id=194 data-nosnippet>194</a></span><span class="kw">fn </span>test_increase_indent() { |
| <a href=#195 id=195 data-nosnippet>195</a> <span class="kw">let </span>arm_list = { |
| <a href=#196 id=196 data-nosnippet>196</a> <span class="kw">let </span>arm = make::match_arm(make::wildcard_pat().into(), <span class="prelude-val">None</span>, make::ext::expr_unit()); |
| <a href=#197 id=197 data-nosnippet>197</a> make::match_arm_list([arm.clone(), arm]) |
| <a href=#198 id=198 data-nosnippet>198</a> }; |
| <a href=#199 id=199 data-nosnippet>199</a> <span class="macro">assert_eq!</span>( |
| <a href=#200 id=200 data-nosnippet>200</a> arm_list.syntax().to_string(), |
| <a href=#201 id=201 data-nosnippet>201</a> <span class="string">"{ |
| <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>}" |
| <a href=#205 id=205 data-nosnippet>205</a> </span>); |
| <a href=#206 id=206 data-nosnippet>206</a> <span class="kw">let </span>indented = arm_list.indent(IndentLevel(<span class="number">2</span>)); |
| <a href=#207 id=207 data-nosnippet>207</a> <span class="macro">assert_eq!</span>( |
| <a href=#208 id=208 data-nosnippet>208</a> indented.syntax().to_string(), |
| <a href=#209 id=209 data-nosnippet>209</a> <span class="string">"{ |
| <a href=#210 id=210 data-nosnippet>210</a> _ => (), |
| <a href=#211 id=211 data-nosnippet>211</a> _ => (), |
| <a href=#212 id=212 data-nosnippet>212</a> }" |
| <a href=#213 id=213 data-nosnippet>213</a> </span>); |
| <a href=#214 id=214 data-nosnippet>214</a>} |
| </code></pre></div></section></main></body></html> |
