73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
/*=============================================================================
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Copyright (c) 2017 Paul Fultz II
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mutable.cpp
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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 copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#include <boost/hof/mutable.hpp>
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#include <boost/hof/lazy.hpp>
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#include <boost/hof/detail/move.hpp>
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#include <memory>
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#include "test.hpp"
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struct mutable_fun
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{
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int x;
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mutable_fun() noexcept
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: x(1)
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{}
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int operator()(int i) noexcept
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{
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x+=i;
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return x;
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}
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};
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#if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
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BOOST_HOF_TEST_CASE()
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{
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static_assert(noexcept(boost::hof::mutable_(mutable_fun())(3)), "noexcept mutable_");
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}
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#endif
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BOOST_HOF_TEST_CASE()
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{
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BOOST_HOF_TEST_CHECK(boost::hof::mutable_(mutable_fun())(3) == 4);
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}
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BOOST_HOF_TEST_CASE()
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{
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auto mut_fun = mutable_fun();
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auto by_5 = boost::hof::lazy(boost::hof::mutable_(std::ref(mut_fun)))(5);
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BOOST_HOF_TEST_CHECK(by_5() == 6);
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BOOST_HOF_TEST_CHECK(by_5() == 11);
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}
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struct mutable_move_fun
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{
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std::unique_ptr<int> x;
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mutable_move_fun() : x(new int(1))
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{}
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int operator()(int i)
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{
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*x+=i;
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return *x;
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}
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};
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BOOST_HOF_TEST_CASE()
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{
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BOOST_HOF_TEST_CHECK(boost::hof::mutable_(mutable_move_fun())(3) == 4);
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}
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BOOST_HOF_TEST_CASE()
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{
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auto mut_fun = mutable_move_fun();
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auto by_5 = boost::hof::lazy(boost::hof::mutable_(boost::hof::move(mut_fun)))(5);
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BOOST_HOF_TEST_CHECK(by_5() == 6);
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BOOST_HOF_TEST_CHECK(by_5() == 11);
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}
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