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Use finer grained assertions acknowledging Constants
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@@ -9,7 +9,7 @@ Distributed under the Boost Software License, Version 1.0.
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#include <boost/hana/core/datatype.hpp>
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#include <boost/hana/core/is_a.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/detail/assert.hpp>
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using namespace boost::hana;
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@@ -32,21 +32,21 @@ using Integer2 = datatype_t<integer2>;
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int main() {
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// An instance is provided for EqualityComparable types whose data type
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// is the same as their C++ type.
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BOOST_HANA_STATIC_ASSERT(equal(integer{0}, integer{0}));
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BOOST_HANA_STATIC_ASSERT(!equal(integer{0}, integer{1}));
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BOOST_HANA_STATIC_ASSERT(is_a<Comparable, Integer, Integer>);
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BOOST_HANA_CONSTEXPR_ASSERT(equal(integer{0}, integer{0}));
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BOOST_HANA_CONSTEXPR_ASSERT(!equal(integer{0}, integer{1}));
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BOOST_HANA_CONSTANT_ASSERT(is_a<Comparable, Integer, Integer>);
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// No instance is provided when the data type differs from the C++ type,
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// even if the C++ type is EqualityComparable.
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BOOST_HANA_STATIC_ASSERT(!is_a<Comparable, Integer2, Integer2>);
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BOOST_HANA_CONSTANT_ASSERT(!is_a<Comparable, Integer2, Integer2>);
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// Two objects of different data types are unequal by default.
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struct X { };
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struct Y { };
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BOOST_HANA_STATIC_ASSERT(is_a<Comparable, X, Y>);
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BOOST_HANA_STATIC_ASSERT(!equal(X{}, Y{}));
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BOOST_HANA_CONSTANT_ASSERT(is_a<Comparable, X, Y>);
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BOOST_HANA_CONSTANT_ASSERT(!equal(X{}, Y{}));
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// No instance is provided when the two objects are of the same data type.
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BOOST_HANA_STATIC_ASSERT(!is_a<Comparable, X, X>);
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BOOST_HANA_STATIC_ASSERT(!is_a<Comparable, Y, Y>);
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BOOST_HANA_CONSTANT_ASSERT(!is_a<Comparable, X, X>);
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BOOST_HANA_CONSTANT_ASSERT(!is_a<Comparable, Y, Y>);
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}
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