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* [gcc r14-6929] libstdc++: Use _GLIBCXX_USE_BUILTIN_TRAIT
@ 2024-01-05 0:17 Ken Matsui
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From: Ken Matsui @ 2024-01-05 0:17 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:f151db0f0ea48c2624baf258dca7ae232896ebf4
commit r14-6929-gf151db0f0ea48c2624baf258dca7ae232896ebf4
Author: Ken Matsui <kmatsui@gcc.gnu.org>
Date: Mon Sep 11 08:21:50 2023 -0700
libstdc++: Use _GLIBCXX_USE_BUILTIN_TRAIT
This patch uses _GLIBCXX_USE_BUILTIN_TRAIT macro instead of __has_builtin
in the type_traits header for traits that have a corresponding fallback
non-built-in implementation. This macro supports to toggle the use of
built-in traits in the type_traits header through
_GLIBCXX_DO_NOT_USE_BUILTIN_TRAITS macro, without needing to modify the
source code.
libstdc++-v3/ChangeLog:
* include/std/type_traits: Use _GLIBCXX_USE_BUILTIN_TRAIT.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Patrick Palka <ppalka@redhat.com>
Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
Diff:
---
libstdc++-v3/include/std/type_traits | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 217cfac13a8..a71162b33ec 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -1481,7 +1481,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: public __bool_constant<__is_base_of(_Base, _Derived)>
{ };
-#if __has_builtin(__is_convertible)
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_convertible)
template<typename _From, typename _To>
struct is_convertible
: public __bool_constant<__is_convertible(_From, _To)>
@@ -1531,7 +1531,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#ifdef __cpp_lib_is_nothrow_convertible // C++ >= 20
-#if __has_builtin(__is_nothrow_convertible)
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_nothrow_convertible)
/// is_nothrow_convertible_v
template<typename _From, typename _To>
inline constexpr bool is_nothrow_convertible_v
@@ -1606,7 +1606,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ using type = _Tp; };
/// remove_cv
-#if __has_builtin(__remove_cv)
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_cv)
template<typename _Tp>
struct remove_cv
{ using type = __remove_cv(_Tp); };
@@ -1672,7 +1672,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Reference transformations.
/// remove_reference
-#if __has_builtin(__remove_reference)
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_reference)
template<typename _Tp>
struct remove_reference
{ using type = __remove_reference(_Tp); };
@@ -3537,7 +3537,7 @@ template<typename _Ret, typename _Fn, typename... _Args>
* @{
*/
#ifdef __cpp_lib_remove_cvref // C++ >= 20
-# if __has_builtin(__remove_cvref)
+# if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_cvref)
template<typename _Tp>
struct remove_cvref
{ using type = __remove_cvref(_Tp); };
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