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// Copyright 2017, 2024 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
#include <boost/variant2/variant.hpp>
using namespace boost::variant2;
#if !defined(BOOST_MP11_HAS_CXX14_CONSTEXPR)
#include <boost/config/pragma_message.hpp>
BOOST_PRAGMA_MESSAGE("Skipping constexpr visit test because BOOST_MP11_HAS_CXX14_CONSTEXPR is not defined")
int main() {}
#else
struct X
{
constexpr operator int() const { return 2; }
};
struct F
{
constexpr int operator()( int x ) const
{
return x;
}
};
#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
int main()
{
{
constexpr variant<int> v( 1 );
STATIC_ASSERT( visit( F(), v ) == 1 );
}
{
constexpr variant<char, int> v( 'a' );
STATIC_ASSERT( visit( F(), v ) == 'a' );
}
{
constexpr variant<char, int, X> v( X{} );
STATIC_ASSERT( visit( F(), v ) == 2 );
}
}
#endif
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