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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 old values of non-copyable types.
- #include "if_copyable.hpp"
- #include <boost/contract/public_function.hpp>
- #include <boost/contract/function.hpp>
- #include <boost/contract/base_types.hpp>
- #include <boost/contract/override.hpp>
- #include <boost/contract/old.hpp>
- #include <boost/contract/check.hpp>
- #include <boost/contract/assert.hpp>
- #include <boost/noncopyable.hpp>
- #include <boost/detail/lightweight_test.hpp>
- unsigned old_checks;
- template<typename T>
- struct b {
- virtual void next(T& x, boost::contract::virtual_* v = 0) {
- boost::contract::old_ptr_if_copyable<T> old_x =
- BOOST_CONTRACT_OLDOF(v, x);
- boost::contract::check c = boost::contract::public_function(v, this)
- .postcondition([&] {
- if(old_x) {
- BOOST_CONTRACT_ASSERT(x == *old_x + T(1));
- ++old_checks;
- }
- })
- ;
- ++x;
- }
- BOOST_CONTRACT_OVERRIDE(next)
- };
- template<typename T>
- struct a
- #define BASES public b<T>
- : BASES
- {
- typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
- #undef BASES
- virtual void next(T& x, boost::contract::virtual_* v = 0) /* override */ {
- boost::contract::old_ptr_if_copyable<T> old_x =
- BOOST_CONTRACT_OLDOF(v, x);
- boost::contract::check c = boost::contract::public_function<
- override_next>(v, &a::next, this, x)
- .postcondition([&] {
- if(old_x) {
- BOOST_CONTRACT_ASSERT(x == *old_x + T(1));
- ++old_checks;
- }
- })
- ;
- ++x;
- }
- BOOST_CONTRACT_OVERRIDE(next)
- };
- template<typename T>
- void next(T& x) {
- boost::contract::old_ptr_if_copyable<T> old_x = BOOST_CONTRACT_OLDOF(x);
- boost::contract::check c = boost::contract::function()
- .postcondition([&] {
- if(old_x) {
- BOOST_CONTRACT_ASSERT(x == *old_x + T(1));
- ++old_checks;
- }
- })
- ;
- ++x;
- }
-
- int main() {
- int i = 1; // Test built-in copyable type.
- cp c(1); // Test custom copyable type.
- ncp n(1); // Test non-copyable type.
- // Test free functions (old values without `v`).
- unsigned cnt =
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- 1
- #else
- 0
- #endif
- ;
- old_checks = 0;
- next(i);
- BOOST_TEST_EQ(old_checks, cnt);
-
- old_checks = 0;
- next(c);
- BOOST_TEST_EQ(old_checks, cnt);
- old_checks = 0;
- next(n);
- BOOST_TEST_EQ(old_checks, 0u);
- // Test virtual functions (old values with `v`).
-
- cnt =
- #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
- 2
- #else
- 0
- #endif
- ;
- a<int> ai;
- old_checks = 0;
- ai.next(i);
- BOOST_TEST_EQ(old_checks, cnt);
-
- a<cp> ac;
- old_checks = 0;
- ac.next(c);
- BOOST_TEST_EQ(old_checks, cnt);
- a<ncp> an;
- old_checks = 0;
- an.next(n);
- BOOST_TEST_EQ(old_checks, 0u);
- return boost::report_errors();
- }
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