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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>
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::is_invocable;
// nonfunction
BOOST_TEST_TRAIT_FALSE(( is_invocable<int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<int, int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<int, int, int> ));
// function reference
BOOST_TEST_TRAIT_TRUE(( is_invocable<void(&)()> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<char(&)(int), char> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int(&)(int, int), int, int> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<double(&)(double, double, double), float, float, float> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<void(&)(), int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(&)(int)> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(&)(int), int, int> ));
// function pointer
BOOST_TEST_TRAIT_TRUE(( is_invocable<void(*)()> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<char(*)(int), char> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int(*)(int, int), int, int> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<double(*)(double, double, double), float, float, float> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<void(*)(), int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(*)(int)> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(*)(int), int, int> ));
// object
BOOST_TEST_TRAIT_TRUE(( is_invocable<F> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<F, char> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<F, int, int> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<F, float, float, float> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<F, int, int, int, int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<F const> ));
// member function pointer
BOOST_TEST_TRAIT_TRUE(( is_invocable<void(X::*)(), X> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<char(X::*)(int), X, char> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int(X::*)(int, int), X, int, int> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<double(X::*)(double, double, double), X, float, float, float> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<void(X::*)()> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<void(X::*)(), int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<void(X::*)(), X, int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(X::*)(int)> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(X::*)(int), int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(X::*)(int), X> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<char(X::*)(int), X, int, int> ));
// member data pointer
BOOST_TEST_TRAIT_TRUE(( is_invocable<int X::*, X> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int X::*, X const> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int X::*, X&> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int X::*, X const&> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int X::*, X*> ));
BOOST_TEST_TRAIT_TRUE(( is_invocable<int X::*, X const*> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<int X::*> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<int X::*, int> ));
BOOST_TEST_TRAIT_FALSE(( is_invocable<int X::*, X, int> ));
return boost::report_errors();
}
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