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30 lines
797 B
C++
30 lines
797 B
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/detail/assert.hpp>
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#include <boost/hana/integral.hpp>
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using namespace boost::hana;
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int main() {
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//! [comparable]
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struct Person {
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int age;
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// ...
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};
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BOOST_HANA_CONSTANT_ASSERT(integral<int, 1> == integral<long, 1>);
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BOOST_HANA_CONSTANT_ASSERT(integral<int, 1> != integral<int, 2>);
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BOOST_HANA_CONSTANT_ASSERT(integral<int, 1> != integral<int Person::*, &Person::age>);
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//! [comparable]
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//! [value]
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auto i = integral<int, 3>; // notice no constexpr
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static_assert(value(i) == 3, "value(i) is always a constant expression!");
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//! [value]
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}
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