struct Foo
{
	extern (C) void function (int*) func;
}
struct Bar
{
	static string code ()
	{
		string code;

		foreach (symbol; __traits (allMembers, typeof(this)))
			static if (is(typeof(__traits (getMember, typeof(this), symbol))))
				{}

		return code;
	}

	extern (C) void function (int*) func;

	mixin(code);
}
struct Baz
{
	static string code ()
	{
		string code;

		foreach (symbol; __traits (allMembers, typeof(this)))
			static if (is(typeof(__traits (getMember, typeof(this), symbol))))
				{}

		return code;
	}

	mixin(code);

	extern (C) void function (int*) func;
}

void main () 
{
	static assert (functionLinkage!(typeof(Foo.func)) == `C`);
	static assert (functionLinkage!(typeof(Bar.func)) == `C`);
	static assert (functionLinkage!(typeof(Baz.func)) == `D`); // BUG why?
}