tests/meta/test_metaprogramming.py

#!/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 fruit_test_common import *

COMMON_DEFINITIONS = '''
    #define IN_FRUIT_CPP_FILE
    
    #include "meta/common.h"
    #include <fruit/impl/meta/component.h>
    
    struct A1 {};
    struct B1 {};
    
    using A = Type<A1>;
    using B = Type<B1>;
    '''

def test_GetNthType():
    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__':
    main(__file__)