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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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