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// Copyright 2024 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/compat/invoke.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <boost/mp11/utility.hpp>
struct F
{
void operator()()
{
}
char operator()( char x1 ) noexcept
{
return x1;
}
int operator()( int x1, int x2 ) const
{
return 10*x1+x2;
}
double operator()( float x1, float x2, float x3 ) const noexcept
{
return 100*x1 + 10*x2 + x3;
}
};
struct X
{
};
int main()
{
using boost::compat::invoke_result_t;
using boost::mp11::mp_valid;
// nonfunction
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, int, int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, int, int, int> ));
// function reference
BOOST_TEST_TRAIT_SAME( invoke_result_t<void(&)()>, void );
BOOST_TEST_TRAIT_SAME( invoke_result_t<char(&)(int), char>, char );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int(&)(int, int), int, int>, int );
BOOST_TEST_TRAIT_SAME( invoke_result_t<double(&)(double, double, double), float, float, float>, double );
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, void(&)(), int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(&)(int)> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(&)(int), int, int> ));
// function pointer
BOOST_TEST_TRAIT_SAME( invoke_result_t<void(*)()>, void );
BOOST_TEST_TRAIT_SAME( invoke_result_t<char(*)(int), char>, char );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int(*)(int, int), int, int>, int );
BOOST_TEST_TRAIT_SAME( invoke_result_t<double(*)(double, double, double), float, float, float>, double );
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, void(*)(), int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(*)(int)> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(*)(int), int, int> ));
// object
BOOST_TEST_TRAIT_SAME( invoke_result_t<F>, void );
BOOST_TEST_TRAIT_SAME( invoke_result_t<F, char>, char );
BOOST_TEST_TRAIT_SAME( invoke_result_t<F, int, int>, int );
BOOST_TEST_TRAIT_SAME( invoke_result_t<F, float, float, float>, double );
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, F, int, int, int, int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, F const> ));
// member function pointer
BOOST_TEST_TRAIT_SAME( invoke_result_t<void(X::*)(), X>, void );
BOOST_TEST_TRAIT_SAME( invoke_result_t<char(X::*)(int), X, char>, char );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int(X::*)(int, int), X, int, int>, int );
BOOST_TEST_TRAIT_SAME( invoke_result_t<double(X::*)(double, double, double), X, float, float, float>, double );
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, void(X::*)()> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, void(X::*)(), int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, void(X::*)(), X, int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(X::*)(int)> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(X::*)(int), int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(X::*)(int), X> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, char(X::*)(int), X, int, int> ));
// member data pointer
BOOST_TEST_TRAIT_SAME( invoke_result_t<int X::*, X>, int&& );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int X::*, X const>, int const&& );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int X::*, X&>, int& );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int X::*, X const&>, int const& );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int X::*, X*>, int& );
BOOST_TEST_TRAIT_SAME( invoke_result_t<int X::*, X const*>, int const& );
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, int X::*> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, int X::*, int> ));
BOOST_TEST_TRAIT_FALSE(( mp_valid<invoke_result_t, int X::*, X, int> ));
return boost::report_errors();
}
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