| <!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/span/src/map.rs`."><title>map.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="span" data-themes="" data-resource-suffix="" data-rustdoc-version="1.91.1 (ed61e7d7e 2025-11-07)" data-channel="1.91.1" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-c3e638e9.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-6dc2a7f3.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">span/</div>map.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">//! A map that maps a span to every position in a file. Usually maps a span to some range of positions. |
| <a href=#2 id=2 data-nosnippet>2</a>//! Allows bidirectional lookup. |
| <a href=#3 id=3 data-nosnippet>3</a> |
| <a href=#4 id=4 data-nosnippet>4</a></span><span class="kw">use </span>std::{fmt, hash::Hash}; |
| <a href=#5 id=5 data-nosnippet>5</a> |
| <a href=#6 id=6 data-nosnippet>6</a><span class="kw">use </span>stdx::{always, itertools::Itertools}; |
| <a href=#7 id=7 data-nosnippet>7</a> |
| <a href=#8 id=8 data-nosnippet>8</a><span class="kw">use crate</span>::{ |
| <a href=#9 id=9 data-nosnippet>9</a> EditionedFileId, ErasedFileAstId, ROOT_ERASED_FILE_AST_ID, Span, SpanAnchor, SpanData, |
| <a href=#10 id=10 data-nosnippet>10</a> SyntaxContext, TextRange, TextSize, |
| <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="doccomment">/// Maps absolute text ranges for the corresponding file to the relevant span data. |
| <a href=#14 id=14 data-nosnippet>14</a></span><span class="attr">#[derive(Debug, PartialEq, Eq, Clone, Hash)] |
| <a href=#15 id=15 data-nosnippet>15</a></span><span class="kw">pub struct </span>SpanMap<S> { |
| <a href=#16 id=16 data-nosnippet>16</a> <span class="doccomment">/// The offset stored here is the *end* of the node. |
| <a href=#17 id=17 data-nosnippet>17</a> </span>spans: Vec<(TextSize, SpanData<S>)>, |
| <a href=#18 id=18 data-nosnippet>18</a> <span class="doccomment">/// Index of the matched macro arm on successful expansion for declarative macros. |
| <a href=#19 id=19 data-nosnippet>19</a> </span><span class="comment">// FIXME: Does it make sense to have this here? |
| <a href=#20 id=20 data-nosnippet>20</a> </span><span class="kw">pub </span>matched_arm: <span class="prelude-ty">Option</span><u32>, |
| <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><span class="kw">impl</span><S> SpanMap<S> |
| <a href=#24 id=24 data-nosnippet>24</a><span class="kw">where |
| <a href=#25 id=25 data-nosnippet>25</a> </span>SpanData<S>: Copy, |
| <a href=#26 id=26 data-nosnippet>26</a>{ |
| <a href=#27 id=27 data-nosnippet>27</a> <span class="doccomment">/// Creates a new empty [`SpanMap`]. |
| <a href=#28 id=28 data-nosnippet>28</a> </span><span class="kw">pub fn </span>empty() -> <span class="self">Self </span>{ |
| <a href=#29 id=29 data-nosnippet>29</a> <span class="self">Self </span>{ spans: Vec::new(), matched_arm: <span class="prelude-val">None </span>} |
| <a href=#30 id=30 data-nosnippet>30</a> } |
| <a href=#31 id=31 data-nosnippet>31</a> |
| <a href=#32 id=32 data-nosnippet>32</a> <span class="doccomment">/// Finalizes the [`SpanMap`], shrinking its backing storage and validating that the offsets are |
| <a href=#33 id=33 data-nosnippet>33</a> /// in order. |
| <a href=#34 id=34 data-nosnippet>34</a> </span><span class="kw">pub fn </span>finish(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <a href=#35 id=35 data-nosnippet>35</a> <span class="macro">always!</span>( |
| <a href=#36 id=36 data-nosnippet>36</a> <span class="self">self</span>.spans.iter().tuple_windows().all(|(a, b)| a.<span class="number">0 </span>< b.<span class="number">0</span>), |
| <a href=#37 id=37 data-nosnippet>37</a> <span class="string">"spans are not in order" |
| <a href=#38 id=38 data-nosnippet>38</a> </span>); |
| <a href=#39 id=39 data-nosnippet>39</a> <span class="self">self</span>.spans.shrink_to_fit(); |
| <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="doccomment">/// Pushes a new span onto the [`SpanMap`]. |
| <a href=#43 id=43 data-nosnippet>43</a> </span><span class="kw">pub fn </span>push(<span class="kw-2">&mut </span><span class="self">self</span>, offset: TextSize, span: SpanData<S>) { |
| <a href=#44 id=44 data-nosnippet>44</a> <span class="kw">if </span><span class="macro">cfg!</span>(debug_assertions) |
| <a href=#45 id=45 data-nosnippet>45</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(<span class="kw-2">&</span>(last_offset, <span class="kw">_</span>)) = <span class="self">self</span>.spans.last() |
| <a href=#46 id=46 data-nosnippet>46</a> { |
| <a href=#47 id=47 data-nosnippet>47</a> <span class="macro">assert!</span>( |
| <a href=#48 id=48 data-nosnippet>48</a> last_offset < offset, |
| <a href=#49 id=49 data-nosnippet>49</a> <span class="string">"last_offset({last_offset:?}) must be smaller than offset({offset:?})" |
| <a href=#50 id=50 data-nosnippet>50</a> </span>); |
| <a href=#51 id=51 data-nosnippet>51</a> } |
| <a href=#52 id=52 data-nosnippet>52</a> <span class="self">self</span>.spans.push((offset, span)); |
| <a href=#53 id=53 data-nosnippet>53</a> } |
| <a href=#54 id=54 data-nosnippet>54</a> |
| <a href=#55 id=55 data-nosnippet>55</a> <span class="doccomment">/// Returns all [`TextRange`]s that correspond to the given span. |
| <a href=#56 id=56 data-nosnippet>56</a> /// |
| <a href=#57 id=57 data-nosnippet>57</a> /// Note this does a linear search through the entire backing vector. |
| <a href=#58 id=58 data-nosnippet>58</a> </span><span class="kw">pub fn </span>ranges_with_span_exact( |
| <a href=#59 id=59 data-nosnippet>59</a> <span class="kw-2">&</span><span class="self">self</span>, |
| <a href=#60 id=60 data-nosnippet>60</a> span: SpanData<S>, |
| <a href=#61 id=61 data-nosnippet>61</a> ) -> <span class="kw">impl </span>Iterator<Item = (TextRange, S)> + <span class="lifetime">'_ |
| <a href=#62 id=62 data-nosnippet>62</a> </span><span class="kw">where |
| <a href=#63 id=63 data-nosnippet>63</a> </span>S: Copy, |
| <a href=#64 id=64 data-nosnippet>64</a> { |
| <a href=#65 id=65 data-nosnippet>65</a> <span class="self">self</span>.spans.iter().enumerate().filter_map(<span class="kw">move </span>|(idx, <span class="kw-2">&</span>(end, s))| { |
| <a href=#66 id=66 data-nosnippet>66</a> <span class="kw">if </span>!s.eq_ignoring_ctx(span) { |
| <a href=#67 id=67 data-nosnippet>67</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#68 id=68 data-nosnippet>68</a> } |
| <a href=#69 id=69 data-nosnippet>69</a> <span class="kw">let </span>start = idx.checked_sub(<span class="number">1</span>).map_or(TextSize::new(<span class="number">0</span>), |prev| <span class="self">self</span>.spans[prev].<span class="number">0</span>); |
| <a href=#70 id=70 data-nosnippet>70</a> <span class="prelude-val">Some</span>((TextRange::new(start, end), s.ctx)) |
| <a href=#71 id=71 data-nosnippet>71</a> }) |
| <a href=#72 id=72 data-nosnippet>72</a> } |
| <a href=#73 id=73 data-nosnippet>73</a> |
| <a href=#74 id=74 data-nosnippet>74</a> <span class="doccomment">/// Returns all [`TextRange`]s whose spans contain the given span. |
| <a href=#75 id=75 data-nosnippet>75</a> /// |
| <a href=#76 id=76 data-nosnippet>76</a> /// Note this does a linear search through the entire backing vector. |
| <a href=#77 id=77 data-nosnippet>77</a> </span><span class="kw">pub fn </span>ranges_with_span(<span class="kw-2">&</span><span class="self">self</span>, span: SpanData<S>) -> <span class="kw">impl </span>Iterator<Item = (TextRange, S)> + <span class="lifetime">'_ |
| <a href=#78 id=78 data-nosnippet>78</a> </span><span class="kw">where |
| <a href=#79 id=79 data-nosnippet>79</a> </span>S: Copy, |
| <a href=#80 id=80 data-nosnippet>80</a> { |
| <a href=#81 id=81 data-nosnippet>81</a> <span class="self">self</span>.spans.iter().enumerate().filter_map(<span class="kw">move </span>|(idx, <span class="kw-2">&</span>(end, s))| { |
| <a href=#82 id=82 data-nosnippet>82</a> <span class="kw">if </span>s.anchor != span.anchor { |
| <a href=#83 id=83 data-nosnippet>83</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#84 id=84 data-nosnippet>84</a> } |
| <a href=#85 id=85 data-nosnippet>85</a> <span class="kw">if </span>!s.range.contains_range(span.range) { |
| <a href=#86 id=86 data-nosnippet>86</a> <span class="kw">return </span><span class="prelude-val">None</span>; |
| <a href=#87 id=87 data-nosnippet>87</a> } |
| <a href=#88 id=88 data-nosnippet>88</a> <span class="kw">let </span>start = idx.checked_sub(<span class="number">1</span>).map_or(TextSize::new(<span class="number">0</span>), |prev| <span class="self">self</span>.spans[prev].<span class="number">0</span>); |
| <a href=#89 id=89 data-nosnippet>89</a> <span class="prelude-val">Some</span>((TextRange::new(start, end), s.ctx)) |
| <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="doccomment">/// Returns the span at the given position. |
| <a href=#94 id=94 data-nosnippet>94</a> </span><span class="kw">pub fn </span>span_at(<span class="kw-2">&</span><span class="self">self</span>, offset: TextSize) -> SpanData<S> { |
| <a href=#95 id=95 data-nosnippet>95</a> <span class="kw">let </span>entry = <span class="self">self</span>.spans.partition_point(|<span class="kw-2">&</span>(it, <span class="kw">_</span>)| it <= offset); |
| <a href=#96 id=96 data-nosnippet>96</a> <span class="self">self</span>.spans[entry].<span class="number">1 |
| <a href=#97 id=97 data-nosnippet>97</a> </span>} |
| <a href=#98 id=98 data-nosnippet>98</a> |
| <a href=#99 id=99 data-nosnippet>99</a> <span class="doccomment">/// Returns the spans associated with the given range. |
| <a href=#100 id=100 data-nosnippet>100</a> /// In other words, this will return all spans that correspond to all offsets within the given range. |
| <a href=#101 id=101 data-nosnippet>101</a> </span><span class="kw">pub fn </span>spans_for_range(<span class="kw-2">&</span><span class="self">self</span>, range: TextRange) -> <span class="kw">impl </span>Iterator<Item = SpanData<S>> + <span class="lifetime">'_ </span>{ |
| <a href=#102 id=102 data-nosnippet>102</a> <span class="kw">let </span>(start, end) = (range.start(), range.end()); |
| <a href=#103 id=103 data-nosnippet>103</a> <span class="kw">let </span>start_entry = <span class="self">self</span>.spans.partition_point(|<span class="kw-2">&</span>(it, <span class="kw">_</span>)| it <= start); |
| <a href=#104 id=104 data-nosnippet>104</a> <span class="kw">let </span>end_entry = <span class="self">self</span>.spans[start_entry..].partition_point(|<span class="kw-2">&</span>(it, <span class="kw">_</span>)| it <= end); <span class="comment">// FIXME: this might be wrong? |
| <a href=#105 id=105 data-nosnippet>105</a> </span><span class="self">self</span>.spans[start_entry..][..end_entry].iter().map(|<span class="kw-2">&</span>(<span class="kw">_</span>, s)| s) |
| <a href=#106 id=106 data-nosnippet>106</a> } |
| <a href=#107 id=107 data-nosnippet>107</a> |
| <a href=#108 id=108 data-nosnippet>108</a> <span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = (TextSize, SpanData<S>)> + <span class="lifetime">'_ </span>{ |
| <a href=#109 id=109 data-nosnippet>109</a> <span class="self">self</span>.spans.iter().copied() |
| <a href=#110 id=110 data-nosnippet>110</a> } |
| <a href=#111 id=111 data-nosnippet>111</a> |
| <a href=#112 id=112 data-nosnippet>112</a> <span class="doccomment">/// Merges this span map with another span map, where `other` is inserted at (and replaces) `other_range`. |
| <a href=#113 id=113 data-nosnippet>113</a> /// |
| <a href=#114 id=114 data-nosnippet>114</a> /// The length of the replacement node needs to be `other_size`. |
| <a href=#115 id=115 data-nosnippet>115</a> </span><span class="kw">pub fn </span>merge(<span class="kw-2">&mut </span><span class="self">self</span>, other_range: TextRange, other_size: TextSize, other: <span class="kw-2">&</span>SpanMap<S>) { |
| <a href=#116 id=116 data-nosnippet>116</a> <span class="comment">// I find the following diagram helpful to illustrate the bounds and why we use `<` or `<=`: |
| <a href=#117 id=117 data-nosnippet>117</a> // -------------------------------------------------------------------- |
| <a href=#118 id=118 data-nosnippet>118</a> // 1 3 5 6 7 10 11 <-- offsets we store |
| <a href=#119 id=119 data-nosnippet>119</a> // 0-1 1-3 3-5 5-6 6-7 7-10 10-11 <-- ranges these offsets refer to |
| <a href=#120 id=120 data-nosnippet>120</a> // 3 .. 7 <-- other_range |
| <a href=#121 id=121 data-nosnippet>121</a> // 3-5 5-6 6-7 <-- ranges we replace (len = 7-3 = 4) |
| <a href=#122 id=122 data-nosnippet>122</a> // ^^^^^^^^^^^ ^^^^^^^^^^ |
| <a href=#123 id=123 data-nosnippet>123</a> // remove shift |
| <a href=#124 id=124 data-nosnippet>124</a> // 2 3 5 9 <-- offsets we insert |
| <a href=#125 id=125 data-nosnippet>125</a> // 0-2 2-3 3-5 5-9 <-- ranges we insert (other_size = 9-0 = 9) |
| <a href=#126 id=126 data-nosnippet>126</a> // ------------------------------------ |
| <a href=#127 id=127 data-nosnippet>127</a> // 1 3 |
| <a href=#128 id=128 data-nosnippet>128</a> // 0-1 1-3 <-- these remain intact |
| <a href=#129 id=129 data-nosnippet>129</a> // 5 6 8 12 |
| <a href=#130 id=130 data-nosnippet>130</a> // 3-5 5-6 6-8 8-12 <-- we shift these by other_range.start() and insert them |
| <a href=#131 id=131 data-nosnippet>131</a> // 15 16 |
| <a href=#132 id=132 data-nosnippet>132</a> // 12-15 15-16 <-- we shift these by other_size-other_range.len() = 9-4 = 5 |
| <a href=#133 id=133 data-nosnippet>133</a> // ------------------------------------ |
| <a href=#134 id=134 data-nosnippet>134</a> // 1 3 5 6 8 12 15 16 <-- final offsets we store |
| <a href=#135 id=135 data-nosnippet>135</a> // 0-1 1-3 3-5 5-6 6-8 8-12 12-15 15-16 <-- final ranges |
| <a href=#136 id=136 data-nosnippet>136</a> |
| <a href=#137 id=137 data-nosnippet>137</a> </span><span class="self">self</span>.spans.retain_mut(|(offset, <span class="kw">_</span>)| { |
| <a href=#138 id=138 data-nosnippet>138</a> <span class="kw">if </span>other_range.start() < <span class="kw-2">*</span>offset && <span class="kw-2">*</span>offset <= other_range.end() { |
| <a href=#139 id=139 data-nosnippet>139</a> <span class="bool-val">false |
| <a href=#140 id=140 data-nosnippet>140</a> </span>} <span class="kw">else </span>{ |
| <a href=#141 id=141 data-nosnippet>141</a> <span class="kw">if </span><span class="kw-2">*</span>offset > other_range.end() { |
| <a href=#142 id=142 data-nosnippet>142</a> <span class="kw-2">*</span>offset += other_size; |
| <a href=#143 id=143 data-nosnippet>143</a> <span class="kw-2">*</span>offset -= other_range.len(); |
| <a href=#144 id=144 data-nosnippet>144</a> } |
| <a href=#145 id=145 data-nosnippet>145</a> <span class="bool-val">true |
| <a href=#146 id=146 data-nosnippet>146</a> </span>} |
| <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> <span class="self">self</span>.spans |
| <a href=#150 id=150 data-nosnippet>150</a> .extend(other.spans.iter().map(|<span class="kw-2">&</span>(offset, span)| (offset + other_range.start(), span))); |
| <a href=#151 id=151 data-nosnippet>151</a> |
| <a href=#152 id=152 data-nosnippet>152</a> <span class="self">self</span>.spans.sort_unstable_by_key(|<span class="kw-2">&</span>(offset, <span class="kw">_</span>)| offset); |
| <a href=#153 id=153 data-nosnippet>153</a> |
| <a href=#154 id=154 data-nosnippet>154</a> <span class="comment">// Matched arm info is no longer correct once we have multiple macros. |
| <a href=#155 id=155 data-nosnippet>155</a> </span><span class="self">self</span>.matched_arm = <span class="prelude-val">None</span>; |
| <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> |
| <a href=#159 id=159 data-nosnippet>159</a><span class="attr">#[derive(PartialEq, Eq, Hash, Debug)] |
| <a href=#160 id=160 data-nosnippet>160</a></span><span class="kw">pub struct </span>RealSpanMap { |
| <a href=#161 id=161 data-nosnippet>161</a> file_id: EditionedFileId, |
| <a href=#162 id=162 data-nosnippet>162</a> <span class="doccomment">/// Invariant: Sorted vec over TextSize |
| <a href=#163 id=163 data-nosnippet>163</a> </span><span class="comment">// FIXME: SortedVec<(TextSize, ErasedFileAstId)>? |
| <a href=#164 id=164 data-nosnippet>164</a> </span>pairs: Box<[(TextSize, ErasedFileAstId)]>, |
| <a href=#165 id=165 data-nosnippet>165</a> end: TextSize, |
| <a href=#166 id=166 data-nosnippet>166</a>} |
| <a href=#167 id=167 data-nosnippet>167</a> |
| <a href=#168 id=168 data-nosnippet>168</a><span class="kw">impl </span>fmt::Display <span class="kw">for </span>RealSpanMap { |
| <a href=#169 id=169 data-nosnippet>169</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=#170 id=170 data-nosnippet>170</a> <span class="macro">writeln!</span>(f, <span class="string">"RealSpanMap({:?}):"</span>, <span class="self">self</span>.file_id)<span class="question-mark">?</span>; |
| <a href=#171 id=171 data-nosnippet>171</a> <span class="kw">for </span>span <span class="kw">in </span><span class="self">self</span>.pairs.iter() { |
| <a href=#172 id=172 data-nosnippet>172</a> <span class="macro">writeln!</span>(f, <span class="string">"{}: {:#?}"</span>, u32::from(span.<span class="number">0</span>), span.<span class="number">1</span>)<span class="question-mark">?</span>; |
| <a href=#173 id=173 data-nosnippet>173</a> } |
| <a href=#174 id=174 data-nosnippet>174</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#175 id=175 data-nosnippet>175</a> } |
| <a href=#176 id=176 data-nosnippet>176</a>} |
| <a href=#177 id=177 data-nosnippet>177</a> |
| <a href=#178 id=178 data-nosnippet>178</a><span class="kw">impl </span>RealSpanMap { |
| <a href=#179 id=179 data-nosnippet>179</a> <span class="doccomment">/// Creates a real file span map that returns absolute ranges (relative ranges to the root ast id). |
| <a href=#180 id=180 data-nosnippet>180</a> </span><span class="kw">pub fn </span>absolute(file_id: EditionedFileId) -> <span class="self">Self </span>{ |
| <a href=#181 id=181 data-nosnippet>181</a> RealSpanMap { |
| <a href=#182 id=182 data-nosnippet>182</a> file_id, |
| <a href=#183 id=183 data-nosnippet>183</a> pairs: Box::from([(TextSize::new(<span class="number">0</span>), ROOT_ERASED_FILE_AST_ID)]), |
| <a href=#184 id=184 data-nosnippet>184</a> end: TextSize::new(!<span class="number">0</span>), |
| <a href=#185 id=185 data-nosnippet>185</a> } |
| <a href=#186 id=186 data-nosnippet>186</a> } |
| <a href=#187 id=187 data-nosnippet>187</a> |
| <a href=#188 id=188 data-nosnippet>188</a> <span class="kw">pub fn </span>from_file( |
| <a href=#189 id=189 data-nosnippet>189</a> file_id: EditionedFileId, |
| <a href=#190 id=190 data-nosnippet>190</a> pairs: Box<[(TextSize, ErasedFileAstId)]>, |
| <a href=#191 id=191 data-nosnippet>191</a> end: TextSize, |
| <a href=#192 id=192 data-nosnippet>192</a> ) -> <span class="self">Self </span>{ |
| <a href=#193 id=193 data-nosnippet>193</a> <span class="self">Self </span>{ file_id, pairs, end } |
| <a href=#194 id=194 data-nosnippet>194</a> } |
| <a href=#195 id=195 data-nosnippet>195</a> |
| <a href=#196 id=196 data-nosnippet>196</a> <span class="kw">pub fn </span>span_for_range(<span class="kw-2">&</span><span class="self">self</span>, range: TextRange) -> Span { |
| <a href=#197 id=197 data-nosnippet>197</a> <span class="macro">assert!</span>( |
| <a href=#198 id=198 data-nosnippet>198</a> range.end() <= <span class="self">self</span>.end, |
| <a href=#199 id=199 data-nosnippet>199</a> <span class="string">"range {range:?} goes beyond the end of the file {:?}"</span>, |
| <a href=#200 id=200 data-nosnippet>200</a> <span class="self">self</span>.end |
| <a href=#201 id=201 data-nosnippet>201</a> ); |
| <a href=#202 id=202 data-nosnippet>202</a> <span class="kw">let </span>start = range.start(); |
| <a href=#203 id=203 data-nosnippet>203</a> <span class="kw">let </span>idx = <span class="self">self |
| <a href=#204 id=204 data-nosnippet>204</a> </span>.pairs |
| <a href=#205 id=205 data-nosnippet>205</a> .binary_search_by(|<span class="kw-2">&</span>(it, <span class="kw">_</span>)| it.cmp(<span class="kw-2">&</span>start).then(std::cmp::Ordering::Less)) |
| <a href=#206 id=206 data-nosnippet>206</a> .unwrap_err(); |
| <a href=#207 id=207 data-nosnippet>207</a> <span class="kw">let </span>(offset, ast_id) = <span class="self">self</span>.pairs[idx - <span class="number">1</span>]; |
| <a href=#208 id=208 data-nosnippet>208</a> Span { |
| <a href=#209 id=209 data-nosnippet>209</a> range: range - offset, |
| <a href=#210 id=210 data-nosnippet>210</a> anchor: SpanAnchor { file_id: <span class="self">self</span>.file_id, ast_id }, |
| <a href=#211 id=211 data-nosnippet>211</a> ctx: SyntaxContext::root(<span class="self">self</span>.file_id.edition()), |
| <a href=#212 id=212 data-nosnippet>212</a> } |
| <a href=#213 id=213 data-nosnippet>213</a> } |
| <a href=#214 id=214 data-nosnippet>214</a>}</code></pre></div></section></main></body></html> |
