forked from boostorg/core
66 lines
1.1 KiB
C++
66 lines
1.1 KiB
C++
/*
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Copyright 2022 Glen Joseph Fernandes
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(glenjofe@gmail.com)
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Distributed under the Boost Software License, Version 1.0.
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(http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/config.hpp>
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#if !defined(BOOST_NO_CXX11_CONSTEXPR)
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#include <boost/core/empty_value.hpp>
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#include <boost/core/lightweight_test.hpp>
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struct empty {
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constexpr int value() const {
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return 1;
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}
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};
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class type {
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public:
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explicit constexpr type(int count)
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: value_(count) { }
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constexpr int value() const {
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return value_;
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}
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private:
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int value_;
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};
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void test_int()
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{
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constexpr boost::empty_value<int> v(boost::empty_init_t(), 4);
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constexpr int c = v.get();
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BOOST_TEST_EQ(c, 4);
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}
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void test_empty()
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{
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constexpr boost::empty_value<empty> v = boost::empty_init_t();
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constexpr int c = v.get().value();
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BOOST_TEST_EQ(c, 1);
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}
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void test_type()
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{
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constexpr boost::empty_value<type> v(boost::empty_init_t(), 2);
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constexpr int c = v.get().value();
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BOOST_TEST_EQ(c, 2);
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}
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int main()
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{
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test_int();
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test_empty();
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test_type();
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return boost::report_errors();
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}
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#else
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int main()
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{
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return 0;
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}
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#endif
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