forked from boostorg/core
73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
/*
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Copyright 2018 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/core/empty_value.hpp>
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#include <boost/core/lightweight_test.hpp>
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struct empty {
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int value() const {
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return 1;
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}
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int value() {
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return 2;
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}
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};
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class type {
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public:
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explicit type(int count)
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: value_(count) { }
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int value() const {
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return value_ + 1;
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}
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int value() {
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return value_ + 2;
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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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const boost::empty_value<int> v1(boost::empty_init_t(), 7);
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BOOST_TEST(v1.get() == 7);
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boost::empty_value<int> v2 = boost::empty_init_t();
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BOOST_TEST(v2.get() == 0);
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v2 = v1;
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BOOST_TEST(v2.get() == 7);
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v2.get() = 8;
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BOOST_TEST(v2.get() == 8);
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}
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void test_empty()
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{
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const boost::empty_value<empty> v1 = boost::empty_init_t();
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BOOST_TEST(v1.get().value() == 1);
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boost::empty_value<empty> v2;
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BOOST_TEST(v2.get().value() == 2);
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}
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void test_type()
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{
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const boost::empty_value<type> v1(boost::empty_init_t(), 2);
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BOOST_TEST(v1.get().value() == 3);
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boost::empty_value<type> v2(boost::empty_init_t(), 3);
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BOOST_TEST(v2.get().value() == 5);
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v2 = v1;
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BOOST_TEST(v2.get().value() == 4);
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v2.get() = type(4);
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BOOST_TEST(v2.get().value() == 6);
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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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