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Tidy traits

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This commit is contained in:
Simon Brand
2019-06-25 10:47:46 +01:00
parent 3cfcb3ff2d
commit 9839b761e0
1 changed files with 3 additions and 3 deletions
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6
include/tl/optional.hpp
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@ -138,13 +138,13 @@ struct conjunction<B, Bs...>
: std::conditional<bool(B::value), conjunction<Bs...>, B>::type {};
#if defined(_LIBCPP_VERSION) && __cplusplus == 201103L
#define TL_OPTIONAL_LIBCXX_MEM_FN_WORKAROUND
#define TL_TRAITS_LIBCXX_MEM_FN_WORKAROUND
#endif
// In C++11 mode, there's an issue in libc++'s std::mem_fn
// which results in a hard-error when using it in a noexcept expression
// in some cases. This is a check to workaround the common failing case.
#ifdef TL_OPTIONAL_LIBCXX_MEM_FN_WORKAROUND
#ifdef TL_TRAITS_LIBCXX_MEM_FN_WORKAROUND
template <class T> struct is_pointer_to_non_const_member_func : std::false_type{};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret (T::*) (Args...)> : std::true_type{};
@ -167,7 +167,7 @@ template <class T> struct is_const_or_const_ref<T const> : std::true_type{};
// std::invoke from C++17
// https://stackoverflow.com/questions/38288042/c11-14-invoke-workaround
template <typename Fn, typename... Args,
#ifdef TL_OPTIONAL_LIBCXX_MEM_FN_WORKAROUND
#ifdef TL_TRAITS_LIBCXX_MEM_FN_WORKAROUND
typename = enable_if_t<!(is_pointer_to_non_const_member_func<Fn>::value
&& is_const_or_const_ref<Args...>::value)>,
#endif