pkgs/ffigen/test/header_parser_tests/forward_decl.h

// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

struct A;
enum B : unsigned int;

void func(struct A *a, enum B b);

struct A
{
    int a;
    int b;
};

enum B : unsigned int
{
    a,
    b
};