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25 lines
727 B
C++
25 lines
727 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/constexpr.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/maybe.hpp>
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using namespace boost::hana;
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int main() {
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//! [from_maybe]
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BOOST_HANA_STATIC_ASSERT(from_maybe(0, just(1)) == 1);
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BOOST_HANA_STATIC_ASSERT(from_maybe(0, nothing) == 0);
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//! [from_maybe]
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//! [maybe]
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BOOST_HANA_CONSTEXPR_LAMBDA auto inc = [](auto x) { return x + 1; };
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BOOST_HANA_STATIC_ASSERT(maybe(0, inc, just(1)) == 2);
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BOOST_HANA_STATIC_ASSERT(maybe(0, inc, nothing) == 0);
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//! [maybe]
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}
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