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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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