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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 without BOOST_CONTRACT_OLD macro.
#ifndef BOOST_CONTRACT_TEST_OLD_PTR_TYPE
#error "must define BOOST_CONTRACT_TEST_OLD_PTR_TYPE"
#endif
#include "../detail/oteststream.hpp"
#include "../detail/counter.hpp"
#include <boost/contract/function.hpp>
#include <boost/contract/public_function.hpp>
#include <boost/contract/base_types.hpp>
#include <boost/contract/override.hpp>
#include <boost/contract/assert.hpp>
#include <boost/contract/old.hpp>
#include <boost/contract/check.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <cassert>
boost::contract::test::detail::oteststream out;
struct i_tag; typedef boost::contract::test::detail::counter<i_tag, int> i_type;
struct j_tag; typedef boost::contract::test::detail::counter<j_tag, int> j_type;
struct b {
virtual void swap(i_type& i, j_type& j, boost::contract::virtual_* v = 0);
};
void b::swap(i_type& i, j_type& j, boost::contract::virtual_* v) {
BOOST_CONTRACT_TEST_OLD_PTR_TYPE<i_type> old_i = boost::contract::make_old(
v, boost::contract::copy_old(v) ?
i_type::eval(i)
:
boost::contract::null_old()
);
BOOST_CONTRACT_TEST_OLD_PTR_TYPE<j_type> old_j;
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([&] {
out << "b::swap::pre" << std::endl;
BOOST_CONTRACT_ASSERT(i.value != j.value);
})
.old([&] {
out << "b::swap::old" << std::endl;
old_j = boost::contract::make_old(v, boost::contract::copy_old(v) ?
j_type::eval(j) : boost::contract::null_old());
})
.postcondition([&] {
out << "b::swap::post" << std::endl;
BOOST_CONTRACT_ASSERT(i.value == old_j->value);
BOOST_CONTRACT_ASSERT(j.value == old_i->value);
})
;
assert(false);
}
struct a
#define BASES public b
: BASES
{
typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
#undef BASES
void swap(i_type& i, j_type& j, boost::contract::virtual_* v = 0)
/* override */ {
boost::contract::check c = boost::contract::public_function<
override_swap>(v, &a::swap, this, i, j);
out << "a::swap::body" << std::endl;
int t = i.value;
i.value = j.value;
j.value = t;
}
BOOST_CONTRACT_OVERRIDE(swap)
};
struct x_tag;
typedef boost::contract::test::detail::counter<x_tag, char> x_type;
struct y_tag;
typedef boost::contract::test::detail::counter<y_tag, char> y_type;
void swap(x_type& x, y_type& y) {
BOOST_CONTRACT_TEST_OLD_PTR_TYPE<x_type> old_x = boost::contract::make_old(
boost::contract::copy_old() ?
x_type::eval(x)
:
boost::contract::null_old()
);
BOOST_CONTRACT_TEST_OLD_PTR_TYPE<y_type> old_y;
boost::contract::check c = boost::contract::function()
.precondition([&] {
out << "swap::pre" << std::endl;
BOOST_CONTRACT_ASSERT(x.value != y.value);
})
.old([&] {
out << "swap::old" << std::endl;
old_y = boost::contract::make_old(boost::contract::copy_old() ?
y_type::eval(y) : boost::contract::null_old());
})
.postcondition([&] {
out << "swap::post" << std::endl;
BOOST_CONTRACT_ASSERT(x.value == old_y->value);
BOOST_CONTRACT_ASSERT(y.value == old_x->value);
})
;
out << "swap::body" << std::endl;
char t = x.value;
x.value = y.value;
y.value = t;
}
int main() {
std::ostringstream ok;
out.str("");
x_type x; x.value = 'a';
y_type y; y.value = 'b';
swap(x, y);
ok.str(""); ok
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "swap::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "swap::old" << std::endl
#endif
<< "swap::body" << std::endl
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "swap::post" << std::endl
#endif
;
BOOST_TEST(out.eq(ok.str()));
#ifndef BOOST_CONTRACT_NO_OLDS
#define BOOST_CONTRACT_TEST_old 1u
#else
#define BOOST_CONTRACT_TEST_old 0u
#endif
BOOST_TEST_EQ(x.value, 'b');
BOOST_TEST_EQ(x.copies(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(x.evals(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(x.ctors(), x.dtors() + 1); // 1 for local var.
BOOST_TEST_EQ(y.value, 'a');
BOOST_TEST_EQ(y.copies(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(y.evals(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(y.ctors(), y.dtors() + 1); // 1 for local var.
a aa;
i_type i; i.value = 1;
j_type j; j.value = 2;
out.str("");
aa.swap(i, j);
ok.str(""); ok
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "b::swap::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "b::swap::old" << std::endl
#endif
<< "a::swap::body" << std::endl
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "b::swap::old" << std::endl
<< "b::swap::post" << std::endl
#endif
;
BOOST_TEST(out.eq(ok.str()));
BOOST_TEST_EQ(i.value, 2);
BOOST_TEST_EQ(i.copies(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(i.evals(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(i.ctors(), i.dtors() + 1); // 1 for local var.
BOOST_TEST_EQ(j.value, 1);
BOOST_TEST_EQ(j.copies(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(j.evals(), BOOST_CONTRACT_TEST_old);
BOOST_TEST_EQ(j.ctors(), j.dtors() + 1); // 1 for local var.
#undef BOOST_CONTRACT_TEST_old
return boost::report_errors();
}
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