Add goto def for enum variant field

Author: unexge

crates/ra_ide/src/goto_definition.rs

@@ -886,4 +886,23 @@ mod tests {
             "x",
         )
     }
+
+    #[test]
+    fn goto_def_for_enum_variant_field() {
+        check_goto(
+            "
+            //- /lib.rs
+            enum Foo {
+                Bar { x: i32 }
+            }
+            fn baz(foo: Foo) {
+                match foo {
+                    Foo::Bar { x<|> } => x
+                };
+            }
+            ",
+            "x RECORD_FIELD_DEF FileId(1) 21..27 21..22",
+            "x: i32|x",
+        );
+    }
 }

crates/ra_ide_db/src/defs.rs

@@ -126,6 +126,12 @@ fn classify_name_inner(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Opti
                 Some(name_ref_class.definition())
             },
             ast::BindPat(it) => {
+                if let Some(record_field_pat) = it.syntax().parent().and_then(ast::RecordFieldPat::cast) {
+                    return Some(Definition::Field(
+                        sema.resolve_record_field_pat(&record_field_pat)?
+                    ));
+                }
+
                 let local = sema.to_def(&it)?;
                 Some(Definition::Local(local))
             },