goVoidPtr                              ast.Expr // unsafe.Pointer or *byte

	ptrSize int64
	intSize int64
}

var tagGen int
var typedef = make(map[string]*Type)
var goIdent = make(map[string]*ast.Ident)

// unionWithPointer is true for a Go type that represents a C union (or class)
// that may contain a pointer. This is used for cgo pointer checking.