diff options
Diffstat (limited to 'src/boost/libs/mp11/test/mp_valid_and_true.cpp')
-rw-r--r-- | src/boost/libs/mp11/test/mp_valid_and_true.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/boost/libs/mp11/test/mp_valid_and_true.cpp b/src/boost/libs/mp11/test/mp_valid_and_true.cpp new file mode 100644 index 000000000..31cf8fd6e --- /dev/null +++ b/src/boost/libs/mp11/test/mp_valid_and_true.cpp @@ -0,0 +1,48 @@ +// Copyright 2022 Dmitry Arkhipov (grisumbras@gmail.com) +// +// Distributed under the Boost Software License, Version 1.0. +// +// See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt + + +#include <boost/mp11/utility.hpp> +#include <boost/core/lightweight_test_trait.hpp> +#include <cstddef> + +template<class T> +using has_size_t_difference_type + = std::is_same<typename T::difference_type, std::size_t>; + +struct X +{ +}; + +struct Y +{ + using difference_type = int; +}; + +struct Z +{ + using difference_type = std::size_t; +}; + +int main() +{ + using boost::mp11::mp_valid_and_true; + using boost::mp11::mp_valid_and_true_q; + using boost::mp11::mp_quote; + + BOOST_TEST_TRAIT_FALSE((mp_valid_and_true<has_size_t_difference_type, X>)); + BOOST_TEST_TRAIT_FALSE((mp_valid_and_true<has_size_t_difference_type, Y>)); + BOOST_TEST_TRAIT_TRUE((mp_valid_and_true<has_size_t_difference_type, Z>)); + + using Q_size_t_diff = mp_quote<has_size_t_difference_type>; + + BOOST_TEST_TRAIT_FALSE((mp_valid_and_true_q<Q_size_t_diff, X>)); + BOOST_TEST_TRAIT_FALSE((mp_valid_and_true_q<Q_size_t_diff, Y>)); + BOOST_TEST_TRAIT_TRUE((mp_valid_and_true_q<Q_size_t_diff, Z>)); + + return boost::report_errors(); +} |