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CMake C++11 Compatibility: Add more type_traits from C++14 and C++17

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This commit is contained in:
Taylor Sasser
2025-10-16 13:39:11 -04:00
committed by Daniel Tierney
parent 7e4cc9fe22
commit 985b0f5bcf
2 changed files with 24 additions and 11 deletions
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5
Help/dev/source.rst
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@@ -111,7 +111,8 @@ Available features are:
``cm::shared_lock``
* ``<cm/type_traits>``:
``cm::enable_if_t``
``cm::conditional_t``, ``cm::decay_t``, ``cm::enable_if_t``,
``cm::remove_cv_t``, ``cm::remove_reference_t``
* ``<cm/unordered_map>``:
``cm::cbegin``, ``cm::cend``, ``cm::rbegin``, ``cm::rend``,
@@ -169,7 +170,7 @@ Available features are:
* ``<cm/type_traits>``:
``cm::bool_constant``, ``cm::invoke_result_t``, ``cm::invoke_result``,
``cm::void_t``
``cm::is_same_v``, ``cm::void_t``
* ``<cm/unordered_map>``:
``cm::size``, ``cm::empty``, ``cm::data``

30
Utilities/std/cm/type_traits
View File

@@ -11,27 +11,39 @@ namespace cm {
#if __cplusplus >= 201402L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L)
// Miscellaneous transformations
template <bool B, typename T = void>
using enable_if_t = std::enable_if_t<B, T>;
using std::conditional_t;
using std::decay_t;
using std::remove_cv_t;
using std::remove_reference_t;
#else
// Miscellaneous transformations
template <bool B, typename T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
#endif
template <bool B, typename T, typename F>
using conditional_t = typename std::conditional<B, T, F>::type;
template <typename T>
using decay_t = typename std::decay<T>::type;
template <typename T>
using remove_cv_t = typename std::remove_cv<T>::type;
template <typename T>
using remove_reference_t = typename std::remove_reference<T>::type;
#endif // C++14 (_t aliases)
#if __cplusplus >= 201703L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
// Helper classes
using std::bool_constant;
// Miscellaneous transformations
using std::invoke_result;
using std::invoke_result_t;
using std::void_t;
#else
@@ -44,7 +56,7 @@ using bool_constant = std::integral_constant<bool, B>;
template <typename F, typename... ArgTypes>
using invoke_result = std::result_of<F(ArgTypes...)>;
template <class F, typename... ArgTypes>
template <typename F, typename... ArgTypes>
using invoke_result_t = typename invoke_result<F, ArgTypes...>::type;
template <typename... ArgTypes>
@@ -77,13 +89,13 @@ struct is_scoped_enum_helper<T, true>
!std::is_convertible<T, typename std::underlying_type<T>::type>::value>
{
};
}
} // namespace internals
template <typename T>
struct is_scoped_enum : public internals::is_scoped_enum_helper<T>
{
};
#endif
#endif // is_scoped_enum
} // namespace cm