Merge #2205

2205: Implement bulitin line! macro r=matklad a=edwin0cheng

This PR implements bulitin macro `line!` and add basic infra-structure for other bulitin macros:

1. Extend `MacroDefId` to support builtin macros
2. Add a `quote!` macro for simple quasi quoting.

Note that for support others builtin macros, eager macro expansion have to be supported first, this PR not try to handle it. :)

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

1 files changed, 5 insertions, 2 deletions

diff --git a/crates/ra_hir_expand/src/hygiene.rs b/crates/ra_hir_expand/src/hygiene.rs
index 77428ec99..379562a2c 100644
--- a/crates/ra_hir_expand/src/hygiene.rs
+++ b/crates/ra_hir_expand/src/hygiene.rs
@@ -9,7 +9,7 @@ use crate::{
     db::AstDatabase,
     either::Either,
     name::{AsName, Name},
-    HirFileId, HirFileIdRepr,
+    HirFileId, HirFileIdRepr, MacroDefKind,
 };
 
 #[derive(Debug)]
@@ -24,7 +24,10 @@ impl Hygiene {
             HirFileIdRepr::FileId(_) => None,
             HirFileIdRepr::MacroFile(macro_file) => {
                 let loc = db.lookup_intern_macro(macro_file.macro_call_id);
-                Some(loc.def.krate)
+                match loc.def.kind {
+                    MacroDefKind::Declarative => Some(loc.def.krate),
+                    MacroDefKind::BuiltIn(_) => None,
+                }
             }
         };
         Hygiene { def_crate }