internal: Report macro definition errors on the definition

crates/hir-def/src/body.rs

@@ -190,8 +190,9 @@ impl Expander {
 
         let file_id = call_id.as_file();
 
-        let raw_node = match db.parse_or_expand(file_id) {
-            Some(it) => it,
+        let raw_node = match db.parse_or_expand_with_err(file_id) {
+            // FIXME: report parse errors
+            Some(it) => it.syntax_node(),
             None => {
                 // Only `None` if the macro expansion produced no usable AST.
                 if err.is_none() {

crates/hir-def/src/data.rs

@@ -641,7 +641,12 @@ impl<'a> AssocItemCollector<'a> {
                     self.items.push((item.name.clone(), def.into()));
                 }
                 AssocItem::MacroCall(call) => {
-                    if let Some(root) = self.db.parse_or_expand(self.expander.current_file_id()) {
+                    if let Some(root) =
+                        self.db.parse_or_expand_with_err(self.expander.current_file_id())
+                    {
+                        // FIXME: report parse errors
+                        let root = root.syntax_node();
+
                         let call = &item_tree[call];
 
                         let ast_id_map = self.db.ast_id_map(self.expander.current_file_id());

crates/hir-def/src/nameres/collector.rs

@@ -1374,6 +1374,8 @@ impl DefCollector<'_> {
 
         // Then, fetch and process the item tree. This will reuse the expansion result from above.
         let item_tree = self.db.file_item_tree(file_id);
+        // FIXME: report parse errors for the macro expansion here
+
         let mod_dir = self.mod_dirs[&module_id].clone();
         ModCollector {
             def_collector: &mut *self,

crates/hir-def/src/nameres/diagnostics.rs

@@ -34,6 +34,8 @@ pub enum DefDiagnosticKind {
     InvalidDeriveTarget { ast: AstId<ast::Item>, id: usize },
 
     MalformedDerive { ast: AstId<ast::Adt>, id: usize },
+
+    MacroDefError { ast: AstId<ast::Macro>, message: String },
 }
 
 #[derive(Debug, PartialEq, Eq)]