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- // Copyright (C) 2008-2018 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0 (see accompanying
- // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
- // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
- // Test assertion error when operations to check them missing (e.g., `==`).
- #include <boost/contract/function.hpp>
- #include <boost/contract/check.hpp>
- #include <boost/contract/assert.hpp>
- #include <vector>
- template<typename T>
- void push_back(std::vector<T>& vect, T const& value) {
- boost::contract::check c = boost::contract::function()
- .postcondition([&] {
- BOOST_CONTRACT_ASSERT(vect.back() == value); // Error (j has no ==).
- #ifdef BOOST_CONTRACT_NO_ALL
- #error "force error if no contracts (ASSERT expands to nothing)"
- #endif
- })
- ;
- vect.push_back(value);
- }
- struct j { // Type without operator==.
- explicit j(int /* i */) {}
- };
- int main() {
- std::vector<int> vi;
- push_back(vi, 123);
- j jj(456);
- std::vector<j> vj;
- push_back(vj, jj);
- return 0;
- }
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