xref: /aosp_15_r20/external/google-fruit/tests/meta/test_metaprogramming.py (revision a65addddcf69f38db5b288d787b6b7571a57bb8f)

#!/usr/bin/env python3
#  Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from absl.testing import parameterized
from fruit_test_common import *

COMMON_DEFINITIONS = '''
    #define IN_FRUIT_CPP_FILE 1

    #include "meta/common.h"
    #include <fruit/impl/meta/component.h>

    struct A1 {};
    struct B1 {};

    using A = Type<A1>;
    using B = Type<B1>;
    '''

class TestMetaprogramming(parameterized.TestCase):
    def test_GetNthType(self):
        source = '''
            int main() {
              AssertSameType(A, GetNthType(Int<0>, Vector<A>));

              AssertSameType(A, GetNthType(Int<0>, Vector<A, B>));
              AssertSameType(B, GetNthType(Int<1>, Vector<A, B>));
            }
            '''
        expect_success(
            COMMON_DEFINITIONS,
            source,
            locals())

if __name__ == '__main__':
    absltest.main()