Allow constructor and method signatures in classes

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index c3c2d887597c8b0f42f22113e9c0639db85e2d4a..9e5208150c5eb9e35b57235dd11facf449e84120 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -2936,7 +2936,7 @@ class EmptyParentheses final : public Expression {
 // Nodes for the optional type system.
 namespace typesystem {
 
-enum TypeFlags {
+enum TypeFlagsEnum {
   kNormalTypes = 0,
   kDisallowTypeParameters = 1 << 0,
   kDisallowTypeAnnotation = 1 << 1,
@@ -2944,6 +2944,8 @@ enum TypeFlags {
   kConstructorTypes = kDisallowTypeParameters | kDisallowTypeAnnotation
 };
 
+typedef base::Flags<TypeFlagsEnum> TypeFlags;
+
 class FormalParameter;