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From: Jonathan Wakely <redi@gcc.gnu.org>
To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org
Subject: [gcc r14-1572] libstdc++: Do not assume existence of char8_t codecvt
 facet
X-Act-Checkin: gcc
X-Git-Author: Joseph Faulls <Joseph.Faulls@imgtec.com>
X-Git-Refname: refs/heads/master
X-Git-Oldrev: 7e8e071c4b64f1b6ea5ddf528724fc793a0f0e36
X-Git-Newrev: 3d9b3ddb5fc9087c17645d53e6bcb1881e1955a4
Message-Id: <20230606114404.0C8B23858002@sourceware.org>
Date: Tue,  6 Jun 2023 11:44:04 +0000 (GMT)
List-Id: <libstdc++-cvs.sourceware.org>

https://gcc.gnu.org/g:3d9b3ddb5fc9087c17645d53e6bcb1881e1955a4

commit r14-1572-g3d9b3ddb5fc9087c17645d53e6bcb1881e1955a4
Author: Joseph Faulls <Joseph.Faulls@imgtec.com>
Date:   Fri Jun 2 15:44:48 2023 +0000

    libstdc++: Do not assume existence of char8_t codecvt facet
    
    It is not required that codecvt<char8_t, char, mbstate_t> facet be
    supported by the locale, nor is it added as part of the default locale.
    This can lead to dangerous behaviour when static_cast.
    
    libstdc++-v3/ChangeLog:
    
            * include/bits/locale_classes.tcc: Remove check for
            codecvt<char8_t, char, mbstate_t> facet.

Diff:
---
 libstdc++-v3/include/bits/locale_classes.tcc | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/libstdc++-v3/include/bits/locale_classes.tcc b/libstdc++-v3/include/bits/locale_classes.tcc
index 94838cd7796..2351dd5bcfb 100644
--- a/libstdc++-v3/include/bits/locale_classes.tcc
+++ b/libstdc++-v3/include/bits/locale_classes.tcc
@@ -129,9 +129,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       _GLIBCXX_STD_FACET(time_put<wchar_t>);
       _GLIBCXX_STD_FACET(messages<wchar_t>);
 #endif
-#ifdef _GLIBCXX_USE_CHAR8_T
-      _GLIBCXX_STD_FACET(codecvt<char8_t, char, mbstate_t>);
-#endif
 #if __cplusplus >= 201103L
       _GLIBCXX_STD_FACET(codecvt<char16_t, char, mbstate_t>);
       _GLIBCXX_STD_FACET(codecvt<char32_t, char, mbstate_t>);