Re-implement rust string highlighting via tool attribute

crates/ide-db/src/active_parameter.rs

@@ -4,7 +4,7 @@ use either::Either;
 use hir::{InFile, Semantics, Type};
 use parser::T;
 use syntax::{
-    ast::{self, HasArgList, HasName},
+    ast::{self, AstChildren, HasArgList, HasAttrs, HasName},
     match_ast, AstNode, NodeOrToken, SyntaxToken,
 };
 
@@ -37,6 +37,10 @@ impl ActiveParameter {
             _ => None,
         })
     }
+
+    pub fn attrs(&self) -> Option<AstChildren<ast::Attr>> {
+        self.src.as_ref().and_then(|param| Some(param.value.as_ref().right()?.attrs()))
+    }
 }
 
 /// Returns a [`hir::Callable`] this token is a part of and its argument index of said callable.

crates/ide-db/src/imports/insert_use/tests.rs

@@ -1330,7 +1330,7 @@ fn check_merge_only_fail(ra_fixture0: &str, ra_fixture1: &str, mb: MergeBehavior
     assert_eq!(result.map(|u| u.to_string()), None);
 }
 
-fn check_guess(ra_fixture: &str, expected: ImportGranularityGuess) {
+fn check_guess(#[rust_analyzer::rust_fixture] ra_fixture: &str, expected: ImportGranularityGuess) {
     let syntax = ast::SourceFile::parse(ra_fixture, span::Edition::CURRENT).tree().syntax().clone();
     let file = ImportScope::from(syntax).unwrap();
     assert_eq!(super::guess_granularity_from_scope(&file), expected);

crates/ide-db/src/syntax_helpers/suggest_name.rs

@@ -421,7 +421,7 @@ mod tests {
     use super::*;
 
     #[track_caller]
-    fn check(ra_fixture: &str, expected: &str) {
+    fn check(#[rust_analyzer::rust_fixture] ra_fixture: &str, expected: &str) {
         let (db, file_id, range_or_offset) = RootDatabase::with_range_or_offset(ra_fixture);
         let frange = FileRange { file_id, range: range_or_offset.into() };
 

crates/ide-db/src/traits.rs

@@ -123,7 +123,9 @@ mod tests {
     use crate::RootDatabase;
 
     /// Creates analysis from a multi-file fixture, returns positions marked with $0.
-    pub(crate) fn position(ra_fixture: &str) -> (RootDatabase, FilePosition) {
+    pub(crate) fn position(
+        #[rust_analyzer::rust_fixture] ra_fixture: &str,
+    ) -> (RootDatabase, FilePosition) {
         let change_fixture = ChangeFixture::parse(ra_fixture);
         let mut database = RootDatabase::default();
         database.apply_change(change_fixture.change);
@@ -133,7 +135,7 @@ mod tests {
         (database, FilePosition { file_id, offset })
     }
 
-    fn check_trait(ra_fixture: &str, expect: Expect) {
+    fn check_trait(#[rust_analyzer::rust_fixture] ra_fixture: &str, expect: Expect) {
         let (db, position) = position(ra_fixture);
         let sema = Semantics::new(&db);
         let file = sema.parse(position.file_id);
@@ -147,7 +149,7 @@ mod tests {
         expect.assert_eq(&actual);
     }
 
-    fn check_missing_assoc(ra_fixture: &str, expect: Expect) {
+    fn check_missing_assoc(#[rust_analyzer::rust_fixture] ra_fixture: &str, expect: Expect) {
         let (db, position) = position(ra_fixture);
         let sema = Semantics::new(&db);
         let file = sema.parse(position.file_id);