internal: refactor unimplemented builtin macro diagnostic

crates/hir/src/diagnostics.rs

@@ -32,14 +32,15 @@ macro_rules! diagnostics {
 }
 
 diagnostics![
-    UnresolvedModule,
+    InactiveCode,
+    MacroError,
+    MissingFields,
+    UnimplementedBuiltinMacro,
     UnresolvedExternCrate,
     UnresolvedImport,
     UnresolvedMacroCall,
+    UnresolvedModule,
     UnresolvedProcMacro,
-    MacroError,
-    MissingFields,
-    InactiveCode,
 ];
 
 #[derive(Debug)]
@@ -88,26 +89,7 @@ pub struct MacroError {
 
 #[derive(Debug)]
 pub struct UnimplementedBuiltinMacro {
-    pub file: HirFileId,
-    pub node: SyntaxNodePtr,
-}
-
-impl Diagnostic for UnimplementedBuiltinMacro {
-    fn code(&self) -> DiagnosticCode {
-        DiagnosticCode("unimplemented-builtin-macro")
-    }
-
-    fn message(&self) -> String {
-        "unimplemented built-in macro".to_string()
-    }
-
-    fn display_source(&self) -> InFile<SyntaxNodePtr> {
-        InFile::new(self.file, self.node.clone())
-    }
-
-    fn as_any(&self) -> &(dyn Any + Send + 'static) {
-        self
-    }
+    pub node: InFile<SyntaxNodePtr>,
 }
 
 // Diagnostic: no-such-field