add support of cfg attributes on enum variants #4279

Signed-off-by: Benjamin Coenen <[email protected]>

1 files changed, 7 insertions, 1 deletions

diff --git a/crates/ra_hir_def/src/adt.rs b/crates/ra_hir_def/src/adt.rs
index 8eef51828..d0912ddaa 100644
--- a/crates/ra_hir_def/src/adt.rs
+++ b/crates/ra_hir_def/src/adt.rs
@@ -117,7 +117,13 @@ fn lower_enum(
     ast: &InFile<ast::EnumDef>,
     module_id: ModuleId,
 ) {
-    for var in ast.value.variant_list().into_iter().flat_map(|it| it.variants()) {
+    let expander = CfgExpander::new(db, ast.file_id, module_id.krate);
+    let variants =
+        ast.value.variant_list().into_iter().flat_map(|it| it.variants()).filter(|var| {
+            let attrs = expander.parse_attrs(var);
+            expander.is_cfg_enabled(&attrs)
+        });
+    for var in variants {
         trace.alloc(
             || var.clone(),
             || EnumVariantData {