134 lines
3.3 KiB
C++
134 lines
3.3 KiB
C++
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// Copyright (C) 2008-2018 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0 (see accompanying
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// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
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// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
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// Test old values of non-copyable types.
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#include "if_copyable.hpp"
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#include <boost/contract/public_function.hpp>
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#include <boost/contract/function.hpp>
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#include <boost/contract/base_types.hpp>
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#include <boost/contract/override.hpp>
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#include <boost/contract/old.hpp>
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#include <boost/contract/check.hpp>
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#include <boost/contract/assert.hpp>
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#include <boost/noncopyable.hpp>
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#include <boost/detail/lightweight_test.hpp>
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unsigned old_checks;
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template<typename T>
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struct b {
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virtual void next(T& x, boost::contract::virtual_* v = 0) {
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boost::contract::old_ptr_if_copyable<T> old_x =
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BOOST_CONTRACT_OLDOF(v, x);
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boost::contract::check c = boost::contract::public_function(v, this)
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.postcondition([&] {
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if(old_x) {
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BOOST_CONTRACT_ASSERT(x == *old_x + T(1));
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++old_checks;
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}
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})
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;
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++x;
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}
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BOOST_CONTRACT_OVERRIDE(next)
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};
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template<typename T>
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struct a
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#define BASES public b<T>
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: BASES
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{
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typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
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#undef BASES
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virtual void next(T& x, boost::contract::virtual_* v = 0) /* override */ {
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boost::contract::old_ptr_if_copyable<T> old_x =
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BOOST_CONTRACT_OLDOF(v, x);
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boost::contract::check c = boost::contract::public_function<
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override_next>(v, &a::next, this, x)
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.postcondition([&] {
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if(old_x) {
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BOOST_CONTRACT_ASSERT(x == *old_x + T(1));
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++old_checks;
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}
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})
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;
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++x;
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}
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BOOST_CONTRACT_OVERRIDE(next)
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};
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template<typename T>
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void next(T& x) {
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boost::contract::old_ptr_if_copyable<T> old_x = BOOST_CONTRACT_OLDOF(x);
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boost::contract::check c = boost::contract::function()
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.postcondition([&] {
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if(old_x) {
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BOOST_CONTRACT_ASSERT(x == *old_x + T(1));
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++old_checks;
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}
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})
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;
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++x;
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}
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int main() {
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int i = 1; // Test built-in copyable type.
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cp c(1); // Test custom copyable type.
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ncp n(1); // Test non-copyable type.
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// Test free functions (old values without `v`).
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unsigned cnt =
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#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
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1
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#else
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0
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#endif
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;
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old_checks = 0;
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next(i);
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BOOST_TEST_EQ(old_checks, cnt);
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old_checks = 0;
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next(c);
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BOOST_TEST_EQ(old_checks, cnt);
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old_checks = 0;
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next(n);
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BOOST_TEST_EQ(old_checks, 0u);
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// Test virtual functions (old values with `v`).
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cnt =
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#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
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2
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#else
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0
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#endif
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;
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a<int> ai;
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old_checks = 0;
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ai.next(i);
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BOOST_TEST_EQ(old_checks, cnt);
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a<cp> ac;
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old_checks = 0;
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ac.next(c);
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BOOST_TEST_EQ(old_checks, cnt);
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a<ncp> an;
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old_checks = 0;
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an.next(n);
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BOOST_TEST_EQ(old_checks, 0u);
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return boost::report_errors();
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}
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