Ignore proc-macro in completion

Author: edwin0cheng

crates/ra_hir/src/code_model.rs

@@ -759,6 +759,17 @@ impl MacroDef {
     pub fn name(self, db: &dyn HirDatabase) -> Option<Name> {
         self.source(db).value.name().map(|it| it.as_name())
     }
+
+    /// Indicate it is a proc-macro
+    pub fn is_proc_macro(&self) -> bool {
+        match self.id.kind {
+            hir_expand::MacroDefKind::Declarative => false,
+            hir_expand::MacroDefKind::BuiltIn(_) => false,
+            hir_expand::MacroDefKind::BuiltInDerive(_) => false,
+            hir_expand::MacroDefKind::BuiltInEager(_) => false,
+            hir_expand::MacroDefKind::CustomDerive(_) => true,
+        }
+    }
 }
 
 /// Invariant: `inner.as_assoc_item(db).is_some()`

crates/ra_ide/src/completion/presentation.rs

@@ -156,6 +156,12 @@ impl Completions {
         name: Option<String>,
         macro_: hir::MacroDef,
     ) {
+        // FIXME: Currently proc-macro do not have ast-node,
+        // such that it does not have source
+        if macro_.is_proc_macro() {
+            return;
+        }
+
         let name = match name {
             Some(it) => it,
             None => return,