| <!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/interpret.rs`."><title>interpret.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="ide" 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">ide/</div>interpret.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-2"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="kw">use </span>hir::{ConstEvalError, DefWithBody, DisplayTarget, Semantics}; |
| <a href=#2 id=2 data-nosnippet>2</a><span class="kw">use </span>ide_db::{FilePosition, LineIndexDatabase, RootDatabase, base_db::SourceDatabase}; |
| <a href=#3 id=3 data-nosnippet>3</a><span class="kw">use </span>std::time::{Duration, Instant}; |
| <a href=#4 id=4 data-nosnippet>4</a><span class="kw">use </span>stdx::format_to; |
| <a href=#5 id=5 data-nosnippet>5</a><span class="kw">use </span>syntax::{AstNode, TextRange, algo::ancestors_at_offset, ast}; |
| <a href=#6 id=6 data-nosnippet>6</a> |
| <a href=#7 id=7 data-nosnippet>7</a><span class="comment">// Feature: Interpret A Function, Static Or Const. |
| <a href=#8 id=8 data-nosnippet>8</a>// |
| <a href=#9 id=9 data-nosnippet>9</a>// | Editor | Action Name | |
| <a href=#10 id=10 data-nosnippet>10</a>// |---------|-------------| |
| <a href=#11 id=11 data-nosnippet>11</a>// | VS Code | **rust-analyzer: Interpret** | |
| <a href=#12 id=12 data-nosnippet>12</a></span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>interpret(db: <span class="kw-2">&</span>RootDatabase, position: FilePosition) -> String { |
| <a href=#13 id=13 data-nosnippet>13</a> <span class="kw">match </span>find_and_interpret(db, position) { |
| <a href=#14 id=14 data-nosnippet>14</a> <span class="prelude-val">Some</span>((duration, <span class="kw-2">mut </span>result)) => { |
| <a href=#15 id=15 data-nosnippet>15</a> result.push(<span class="string">'\n'</span>); |
| <a href=#16 id=16 data-nosnippet>16</a> <span class="macro">format_to!</span>(result, <span class="string">"----------------------\n"</span>); |
| <a href=#17 id=17 data-nosnippet>17</a> <span class="macro">format_to!</span>(result, <span class="string">" Finished in {}s\n"</span>, duration.as_secs_f32()); |
| <a href=#18 id=18 data-nosnippet>18</a> result |
| <a href=#19 id=19 data-nosnippet>19</a> } |
| <a href=#20 id=20 data-nosnippet>20</a> <span class="kw">_ </span>=> <span class="string">"Not inside a function, const or static"</span>.to_owned(), |
| <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">fn </span>find_and_interpret(db: <span class="kw-2">&</span>RootDatabase, position: FilePosition) -> <span class="prelude-ty">Option</span><(Duration, String)> { |
| <a href=#25 id=25 data-nosnippet>25</a> <span class="kw">let </span>sema = Semantics::new(db); |
| <a href=#26 id=26 data-nosnippet>26</a> <span class="kw">let </span>source_file = sema.parse_guess_edition(position.file_id); |
| <a href=#27 id=27 data-nosnippet>27</a> |
| <a href=#28 id=28 data-nosnippet>28</a> <span class="kw">let </span>item = ancestors_at_offset(source_file.syntax(), position.offset) |
| <a href=#29 id=29 data-nosnippet>29</a> .filter(|it| !ast::MacroCall::can_cast(it.kind())) |
| <a href=#30 id=30 data-nosnippet>30</a> .find_map(ast::Item::cast)<span class="question-mark">?</span>; |
| <a href=#31 id=31 data-nosnippet>31</a> <span class="kw">let </span>def: DefWithBody = <span class="kw">match </span>item { |
| <a href=#32 id=32 data-nosnippet>32</a> ast::Item::Fn(it) => sema.to_def(<span class="kw-2">&</span>it)<span class="question-mark">?</span>.into(), |
| <a href=#33 id=33 data-nosnippet>33</a> ast::Item::Const(it) => sema.to_def(<span class="kw-2">&</span>it)<span class="question-mark">?</span>.into(), |
| <a href=#34 id=34 data-nosnippet>34</a> ast::Item::Static(it) => sema.to_def(<span class="kw-2">&</span>it)<span class="question-mark">?</span>.into(), |
| <a href=#35 id=35 data-nosnippet>35</a> <span class="kw">_ </span>=> <span class="kw">return </span><span class="prelude-val">None</span>, |
| <a href=#36 id=36 data-nosnippet>36</a> }; |
| <a href=#37 id=37 data-nosnippet>37</a> <span class="kw">let </span>span_formatter = |file_id, text_range: TextRange| { |
| <a href=#38 id=38 data-nosnippet>38</a> <span class="kw">let </span>source_root = db.file_source_root(file_id).source_root_id(db); |
| <a href=#39 id=39 data-nosnippet>39</a> <span class="kw">let </span>source_root = db.source_root(source_root).source_root(db); |
| <a href=#40 id=40 data-nosnippet>40</a> |
| <a href=#41 id=41 data-nosnippet>41</a> <span class="kw">let </span>path = source_root.path_for_file(<span class="kw-2">&</span>file_id).map(|x| x.to_string()); |
| <a href=#42 id=42 data-nosnippet>42</a> <span class="kw">let </span>path = path.as_deref().unwrap_or(<span class="string">"<unknown file>"</span>); |
| <a href=#43 id=43 data-nosnippet>43</a> <span class="kw">match </span>db.line_index(file_id).try_line_col(text_range.start()) { |
| <a href=#44 id=44 data-nosnippet>44</a> <span class="prelude-val">Some</span>(line_col) => <span class="macro">format!</span>(<span class="string">"file://{path}:{}:{}"</span>, line_col.line + <span class="number">1</span>, line_col.col), |
| <a href=#45 id=45 data-nosnippet>45</a> <span class="prelude-val">None </span>=> <span class="macro">format!</span>(<span class="string">"file://{path} range {text_range:?}"</span>), |
| <a href=#46 id=46 data-nosnippet>46</a> } |
| <a href=#47 id=47 data-nosnippet>47</a> }; |
| <a href=#48 id=48 data-nosnippet>48</a> <span class="kw">let </span>display_target = def.module(db).krate(db).to_display_target(db); |
| <a href=#49 id=49 data-nosnippet>49</a> <span class="kw">let </span>start_time = Instant::now(); |
| <a href=#50 id=50 data-nosnippet>50</a> <span class="kw">let </span>res = <span class="kw">match </span>def { |
| <a href=#51 id=51 data-nosnippet>51</a> DefWithBody::Function(it) => it.eval(db, span_formatter), |
| <a href=#52 id=52 data-nosnippet>52</a> DefWithBody::Static(it) => it.eval(db).map(|it| it.render(db, display_target)), |
| <a href=#53 id=53 data-nosnippet>53</a> DefWithBody::Const(it) => it.eval(db).map(|it| it.render(db, display_target)), |
| <a href=#54 id=54 data-nosnippet>54</a> <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(), |
| <a href=#55 id=55 data-nosnippet>55</a> }; |
| <a href=#56 id=56 data-nosnippet>56</a> <span class="kw">let </span>res = res.unwrap_or_else(|e| render_const_eval_error(db, e, display_target)); |
| <a href=#57 id=57 data-nosnippet>57</a> <span class="kw">let </span>duration = Instant::now() - start_time; |
| <a href=#58 id=58 data-nosnippet>58</a> <span class="prelude-val">Some</span>((duration, res)) |
| <a href=#59 id=59 data-nosnippet>59</a>} |
| <a href=#60 id=60 data-nosnippet>60</a> |
| <a href=#61 id=61 data-nosnippet>61</a><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>render_const_eval_error( |
| <a href=#62 id=62 data-nosnippet>62</a> db: <span class="kw-2">&</span>RootDatabase, |
| <a href=#63 id=63 data-nosnippet>63</a> e: ConstEvalError<<span class="lifetime">'_</span>>, |
| <a href=#64 id=64 data-nosnippet>64</a> display_target: DisplayTarget, |
| <a href=#65 id=65 data-nosnippet>65</a>) -> String { |
| <a href=#66 id=66 data-nosnippet>66</a> <span class="kw">let </span>span_formatter = |file_id, text_range: TextRange| { |
| <a href=#67 id=67 data-nosnippet>67</a> <span class="kw">let </span>source_root = db.file_source_root(file_id).source_root_id(db); |
| <a href=#68 id=68 data-nosnippet>68</a> <span class="kw">let </span>source_root = db.source_root(source_root).source_root(db); |
| <a href=#69 id=69 data-nosnippet>69</a> <span class="kw">let </span>path = source_root.path_for_file(<span class="kw-2">&</span>file_id).map(|x| x.to_string()); |
| <a href=#70 id=70 data-nosnippet>70</a> <span class="kw">let </span>path = path.as_deref().unwrap_or(<span class="string">"<unknown file>"</span>); |
| <a href=#71 id=71 data-nosnippet>71</a> <span class="kw">match </span>db.line_index(file_id).try_line_col(text_range.start()) { |
| <a href=#72 id=72 data-nosnippet>72</a> <span class="prelude-val">Some</span>(line_col) => <span class="macro">format!</span>(<span class="string">"file://{path}:{}:{}"</span>, line_col.line + <span class="number">1</span>, line_col.col), |
| <a href=#73 id=73 data-nosnippet>73</a> <span class="prelude-val">None </span>=> <span class="macro">format!</span>(<span class="string">"file://{path} range {text_range:?}"</span>), |
| <a href=#74 id=74 data-nosnippet>74</a> } |
| <a href=#75 id=75 data-nosnippet>75</a> }; |
| <a href=#76 id=76 data-nosnippet>76</a> <span class="kw">let </span><span class="kw-2">mut </span>r = String::new(); |
| <a href=#77 id=77 data-nosnippet>77</a> <span class="kw">_ </span>= e.pretty_print(<span class="kw-2">&mut </span>r, db, span_formatter, display_target); |
| <a href=#78 id=78 data-nosnippet>78</a> r |
| <a href=#79 id=79 data-nosnippet>79</a>}</code></pre></div></section></main></body></html> |
