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/*<-
Copyright Barrett Adair 2016-2017
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt)
->*/
#include <boost/callable_traits/detail/config.hpp>
#ifdef BOOST_CLBL_TRTS_DISABLE_REFERENCE_QUALIFIERS
int main(){ return 0; }
#else
//[ add_member_lvalue_reference
#include <type_traits>
#include <boost/callable_traits/add_member_lvalue_reference.hpp>
namespace ct = boost::callable_traits;
struct foo {};
int main() {
{
using pmf = void(foo::*)();
using expect = void(foo::*)() &;
using test = ct::add_member_lvalue_reference_t<pmf>;
static_assert(std::is_same<test, expect>::value, "");
} {
// add_member_lvalue_reference_t doesn't change anything when
// the function type already has an lvalue qualifier.
using pmf = void(foo::*)() &;
using expect = void(foo::*)() &;
using test = ct::add_member_lvalue_reference_t<pmf>;
static_assert(std::is_same<test, expect>::value, "");
} {
// add_member_lvalue_reference_t models C++11 reference collapsing
// rules, so that adding an lvalue qualifier to an
// rvalue-qualified type will force the lvalue.
using pmf = void(foo::*)() &&;
using expect = void(foo::*)() &;
using test = ct::add_member_lvalue_reference_t<pmf>;
static_assert(std::is_same<test, expect>::value, "");
} {
// add_member_lvalue_reference_t can also be used to create "abominable"
// function types.
using f = void();
using expect = void() &;
using test = ct::add_member_lvalue_reference_t<f>;
static_assert(std::is_same<test, expect>::value, "");
}
}
//]
#endif //#ifdef BOOST_CLBL_TRTS_DISABLE_REFERENCE_QUALIFIERS