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307d3d0ec8
- Split type class instances into separate files - Instances provided automatically by a type class are actually MCDs - Test each instance in a single file, not one file per method - Refactor the operator system to fix the ADL-related bug.
37 lines
977 B
C++
37 lines
977 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/comparable.hpp>
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#include <boost/hana/core/is_a.hpp>
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#include <boost/hana/detail/assert.hpp>
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using namespace boost::hana;
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int main() {
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struct X { using hana_datatype = X; };
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struct Y { using hana_datatype = Y; };
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constexpr X x{};
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constexpr Y y{};
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// Two objects of different data types are unequal by default.
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{
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BOOST_HANA_CONSTANT_ASSERT(are<Comparable, X, Y>);
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BOOST_HANA_CONSTANT_ASSERT(not_(equal(x, y)));
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}
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// No instance is provided when the two objects are of the same data type.
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{
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BOOST_HANA_CONSTANT_ASSERT(not_(are<Comparable, X, X>));
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BOOST_HANA_CONSTANT_ASSERT(not_(are<Comparable, Y, Y>));
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}
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// laws
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{
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// we can't check the laws because `X` and `X` is not comparable
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}
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}
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