backend_tests.py 文件源码

def test_sizeof_type(self):
        ffi = FFI(backend=self.Backend())
        ffi.cdef("""
            struct foo { int a; short b, c, d; };
            union foo { int a; short b, c, d; };
        """)
        for c_type, expected_size in [
            ('char', 1),
            ('unsigned int', 4),
            ('char *', SIZE_OF_PTR),
            ('int[5]', 20),
            ('struct foo', 12),
            ('union foo', 4),
            ]:
            size = ffi.sizeof(c_type)
            assert size == expected_size, (size, expected_size, ctype)