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updated boost on windows

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This commit is contained in:
Bassem Girgis
2019-08-13 21:48:48 -05:00
parent 7d77d485fd
commit b40a3bee82
5162 changed files with 473027 additions and 116452 deletions
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40
winx64/include/boost/hana/core/to.hpp
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@@ -39,27 +39,29 @@ BOOST_HANA_NAMESPACE_BEGIN
namespace convert_detail {
struct no_conversion { };
template <typename ...>
struct is_valid { static constexpr bool value = true; };
}
template <typename To, typename From, typename = void>
struct maybe_static_cast : no_conversion {
template <typename X>
static constexpr auto apply(X const&) {
static_assert(detail::wrong<to_impl<To, From>, X>{},
"no conversion is available between the provided types");
}
};
template <typename To, typename From>
struct maybe_static_cast<To, From, decltype((void)
static_cast<To>(std::declval<From>())
)> {
template <typename X>
static constexpr To apply(X&& x)
{ return static_cast<To>(static_cast<X&&>(x)); }
};
} // end namespace convert_detail
template <typename To, typename From, bool condition>
struct to_impl<To, From, when<condition>> : convert_detail::no_conversion {
template <typename X>
static constexpr auto apply(X const&) {
static_assert(detail::wrong<to_impl<To, From>, X>{},
"no conversion is available between the provided types");
}
};
template <typename To, typename From>
struct to_impl<To, From, when<convert_detail::is_valid<
decltype(static_cast<To>(std::declval<From>()))
>::value>> {
template <typename X>
static constexpr To apply(X&& x)
{ return static_cast<To>(static_cast<X&&>(x)); }
};
struct to_impl<To, From, when<condition>>
: convert_detail::maybe_static_cast<To, From>
{ };
template <typename To>
struct to_impl<To, To> : embedding<> {