In field patterns, don't highlight local binding as a field

Author: matklad

crates/ra_ide/src/snapshots/highlighting.html

@@ -84,7 +84,9 @@
     <span class="keyword">let</span> <span class="variable declaration mutable">y</span> = &<span class="keyword">mut</span> <span class="variable mutable">x</span>;
     <span class="keyword">let</span> <span class="variable declaration">z</span> = &<span class="variable mutable">y</span>;
 
-    <span class="variable mutable">y</span>;
+    <span class="keyword">let</span> <span class="struct">Foo</span> { <span class="field">x</span>: <span class="variable declaration">z</span>, <span class="field">y</span> } = <span class="struct">Foo</span> { <span class="field">x</span>: <span class="variable">z</span>, <span class="field">y</span> };
+
+    <span class="variable">y</span>;
 }
 
 <span class="keyword">enum</span> <span class="enum declaration">Option</span>&lt;<span class="type_param declaration">T</span>&gt; {

crates/ra_ide/src/syntax_highlighting/tests.rs

@@ -7,18 +7,6 @@ use crate::{
     FileRange, TextRange,
 };
 
-/// Highlights the code given by the `ra_fixture` argument, renders the
-/// result as HTML, and compares it with the HTML file given as `snapshot`.
-/// Note that the `snapshot` file is overwritten by the rendered HTML.
-fn check_highlighting(ra_fixture: &str, snapshot: &str, rainbow: bool) {
-    let (analysis, file_id) = single_file(ra_fixture);
-    let dst_file = project_dir().join(snapshot);
-    let actual_html = &analysis.highlight_as_html(file_id, rainbow).unwrap();
-    let expected_html = &read_text(&dst_file);
-    fs::write(dst_file, &actual_html).unwrap();
-    assert_eq_text!(expected_html, actual_html);
-}
-
 #[test]
 fn test_highlighting() {
     check_highlighting(
@@ -77,6 +65,8 @@ fn main() {
     let y = &mut x;
     let z = &y;
 
+    let Foo { x: z, y } = Foo { x: z, y };
+
     y;
 }
 
@@ -334,3 +324,15 @@ impl Foo {
         false,
     )
 }
+
+/// Highlights the code given by the `ra_fixture` argument, renders the
+/// result as HTML, and compares it with the HTML file given as `snapshot`.
+/// Note that the `snapshot` file is overwritten by the rendered HTML.
+fn check_highlighting(ra_fixture: &str, snapshot: &str, rainbow: bool) {
+    let (analysis, file_id) = single_file(ra_fixture);
+    let dst_file = project_dir().join(snapshot);
+    let actual_html = &analysis.highlight_as_html(file_id, rainbow).unwrap();
+    let expected_html = &read_text(&dst_file);
+    fs::write(dst_file, &actual_html).unwrap();
+    assert_eq_text!(expected_html, actual_html);
+}

crates/ra_ide_db/src/defs.rs

@@ -78,6 +78,7 @@ impl Definition {
     }
 }
 
+#[derive(Debug)]
 pub enum NameClass {
     Definition(Definition),
     /// `None` in `if let None = Some(82) {}`
@@ -131,9 +132,11 @@ pub fn classify_name(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Option
                 let local = sema.to_def(&it)?;
 
                 if let Some(record_field_pat) = it.syntax().parent().and_then(ast::RecordFieldPat::cast) {
-                    if let Some(field) = sema.resolve_record_field_pat(&record_field_pat) {
-                        let field = Definition::Field(field);
-                        return Some(NameClass::FieldShorthand { local, field });
+                    if record_field_pat.name_ref().is_none() {
+                        if let Some(field) = sema.resolve_record_field_pat(&record_field_pat) {
+                            let field = Definition::Field(field);
+                            return Some(NameClass::FieldShorthand { local, field });
+                        }
                     }
                 }