Merge #3591

3591: Support local macro_rules r=matklad a=edwin0cheng

This PR implement local `macro_rules` in function body, by adding following things:

1. While lowering, add a `MacroDefId` in body's `ItemScope` as a textual legacy macro. 
2. Make `Expander::enter_expand` search with given `ItemScope`.
3. Make `Resolver::resolve_path_as_macro` search with `LocalItemScope`.

Fix #2181

Co-authored-by: Edwin Cheng <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/crates/ra_ide/src/goto_definition.rs b/crates/ra_ide/src/goto_definition.rs
index a55a13ffc..a7be92ce3 100644
--- a/crates/ra_ide/src/goto_definition.rs
+++ b/crates/ra_ide/src/goto_definition.rs
@@ -788,6 +788,21 @@ mod tests {
     }
 
     #[test]
+    fn goto_def_in_local_macro() {
+        check_goto(
+            "
+            //- /lib.rs            
+            fn bar() {
+                macro_rules! foo { () => { () } }
+                <|>foo!();
+            }
+            ",
+            "foo MACRO_CALL FileId(1) [15; 48) [28; 31)",
+            "macro_rules! foo { () => { () } }|foo",
+        );
+    }
+
+    #[test]
     fn goto_def_for_field_init_shorthand() {
         covers!(ra_ide_db::goto_def_for_field_init_shorthand);
         check_goto(