tests/headers/union_with_anon_unnamed_union.h - third_party/github.com/rust-lang/rust-bindgen - Git at Google

 union foo {
     unsigned int a;
     union {
         unsigned short b;
         unsigned char c;
     };
 };
	union foo {
	unsigned int a;
	union {
	unsigned short b;
	unsigned char c;
	};
	};