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Add test/get_by_index.cpp

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Peter Dimov committed 2017-05-29 21:38:04 +03:00
1 parent 99747c7807
commit 781977a237
3 files changed
+189 -40
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include/boost/variant2/variant.hpp
+4 -40
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@@ -114,61 +114,25 @@ template<class U, class... T> constexpr bool holds_alternative( variant<T...> co
template<std::size_t I, class... T> constexpr variant_alternative_t<I, variant<T...>>& get(variant<T...>& v)
{
static_assert( I < sizeof...(T), "Index out of bounds" );
#if BOOST_WORKAROUND( BOOST_MSVC, <= 1910 )
return v.index() == I? v._get_impl( mp_size_t<I>() ): ( throw bad_variant_access(), v._get_impl( mp_size_t<I>() ) );
#else
return v.index() == I? v._get_impl( mp_size_t<I>() ): throw bad_variant_access();
#endif
return ( v.index() == I? (void)0: throw bad_variant_access() ), v._get_impl( mp_size_t<I>() );
}
template<std::size_t I, class... T> constexpr variant_alternative_t<I, variant<T...>>&& get(variant<T...>&& v)
{
static_assert( I < sizeof...(T), "Index out of bounds" );
#if BOOST_WORKAROUND( BOOST_MSVC, <= 1910 )
return std::move( v.index() == I? v._get_impl( mp_size_t<I>() ): ( throw bad_variant_access(), v._get_impl( mp_size_t<I>() ) ) );
#else
return v.index() == I? std::move( v._get_impl( mp_size_t<I>() ) ): throw bad_variant_access();
#endif
return ( v.index() == I? (void)0: throw bad_variant_access() ), std::move( v._get_impl( mp_size_t<I>() ) );
}
template<std::size_t I, class... T> constexpr variant_alternative_t<I, variant<T...> const>& get(variant<T...> const& v)
{
static_assert( I < sizeof...(T), "Index out of bounds" );
#if BOOST_WORKAROUND( BOOST_MSVC, <= 1910 )
return v.index() == I? v._get_impl( mp_size_t<I>() ): ( throw bad_variant_access(), v._get_impl( mp_size_t<I>() ) );
#else
return v.index() == I? v._get_impl( mp_size_t<I>() ): throw bad_variant_access();
#endif
return ( v.index() == I? (void)0: throw bad_variant_access() ), v._get_impl( mp_size_t<I>() );
}
template<std::size_t I, class... T> constexpr variant_alternative_t<I, variant<T...> const>&& get(variant<T...> const&& v)
{
static_assert( I < sizeof...(T), "Index out of bounds" );
#if BOOST_WORKAROUND( BOOST_MSVC, <= 1910 )
return std::move( v.index() == I? v._get_impl( mp_size_t<I>() ): ( throw bad_variant_access(), v._get_impl( mp_size_t<I>() ) ) );
#else
return v.index() == I? std::move( v._get_impl( mp_size_t<I>() ) ): throw bad_variant_access();
#endif
return ( v.index() == I? (void)0: throw bad_variant_access() ), std::move( v._get_impl( mp_size_t<I>() ) );
}
// get