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Add test for types supported by boost::hash, but not by std::hash

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This commit is contained in:
Peter Dimov
2021-03-13 04:50:01 +02:00
parent a2dab8c7d3
commit ae1f72671e
1 changed files with 15 additions and 2 deletions
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17
test/variant_hash.cpp
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@ -12,6 +12,7 @@
#include <boost/core/lightweight_test_trait.hpp> #include <boost/core/lightweight_test_trait.hpp>
#include <boost/container_hash/hash.hpp> #include <boost/container_hash/hash.hpp>
#include <boost/config/workaround.hpp> #include <boost/config/workaround.hpp>
#include <vector>
using namespace boost::variant2; using namespace boost::variant2;
@ -47,7 +48,17 @@ template<template<class...> class Hash, class T> void test2()
BOOST_TEST_NE( h2, h3 ); BOOST_TEST_NE( h2, h3 );
} }
struct X {}; struct X
{
int m = 0;
};
std::size_t hash_value( X const& x )
{
return boost::hash<int>()( x.m );
}
struct Y {}; // no hash support
int main() int main()
{ {
@ -57,6 +68,8 @@ int main()
test<boost::hash, monostate, monostate, monostate>(); test<boost::hash, monostate, monostate, monostate>();
test<boost::hash, int, int, float>(); test<boost::hash, int, int, float>();
test<boost::hash, monostate, X, std::vector<X>>();
test2<std::hash, int>(); test2<std::hash, int>();
test2<std::hash, float>(); test2<std::hash, float>();
@ -65,7 +78,7 @@ int main()
#if !BOOST_WORKAROUND(BOOST_MSVC, < 1910) && ( !defined(_LIBCPP_STD_VER) || _LIBCPP_STD_VER > 11 ) #if !BOOST_WORKAROUND(BOOST_MSVC, < 1910) && ( !defined(_LIBCPP_STD_VER) || _LIBCPP_STD_VER > 11 )
BOOST_TEST_TRAIT_FALSE(( detail::is_hash_enabled<X> )); BOOST_TEST_TRAIT_FALSE(( detail::is_hash_enabled<Y> ));
#endif #endif