backend_tests.py 文件源码

def test_pointer_to_struct(self):
        ffi = FFI(backend=self.Backend())
        ffi.cdef("struct foo { int a; short b, c; };")
        s = ffi.new("struct foo *")
        s.a = -42
        assert s[0].a == -42
        p = ffi.new("struct foo **", s)
        assert p[0].a == -42
        assert p[0][0].a == -42
        p[0].a = -43
        assert s.a == -43
        assert s[0].a == -43
        p[0][0].a = -44
        assert s.a == -44
        assert s[0].a == -44
        s.a = -45
        assert p[0].a == -45
        assert p[0][0].a == -45
        s[0].a = -46
        assert p[0].a == -46
        assert p[0][0].a == -46