[gcc r14-798] libstdc++: Remove redundant dependencies on _GLIBCXX_USE_C99_STDINT_TR1

[gcc r14-798] libstdc++: Remove redundant dependencies on _GLIBCXX_USE_C99_STDINT_TR1

[Jonathan Wakely]

https://gcc.gnu.org/g:1f973c295b699011acd7d5fcb04bd2bf887da16d

commit r14-798-g1f973c295b699011acd7d5fcb04bd2bf887da16d
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri May 12 14:25:50 2023 +0100

    libstdc++: Remove redundant dependencies on _GLIBCXX_USE_C99_STDINT_TR1
    
    We never need to use std::make_unsigned in std::char_traits<char16_t>
    and std::char_traits<char32_t> because <cstdint> guarantees to provide
    the types we need, since r9-2028-g8ba7f29e3dd064.
    
    Similarly, experimental::source_location can just assume uint_least32_t
    is defined by <cstdint>.
    
    libstdc++-v3/ChangeLog:
    
            * include/bits/char_traits.h (char_traits<char16_t>): Do not
            depend on _GLIBCXX_USE_C99_STDINT_TR1.
            (char_traits<char32_t>): Likewise.
            * include/experimental/source_location: Likewise.

Diff:
---
 libstdc++-v3/include/bits/char_traits.h           | 8 ++------
 libstdc++-v3/include/experimental/source_location | 6 ------
 2 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/libstdc++-v3/include/bits/char_traits.h b/libstdc++-v3/include/bits/char_traits.h
index 68ed827f982..0928137854b 100644
--- a/libstdc++-v3/include/bits/char_traits.h
+++ b/libstdc++-v3/include/bits/char_traits.h
@@ -762,10 +762,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       typedef char16_t          char_type;
 #ifdef __UINT_LEAST16_TYPE__
       typedef __UINT_LEAST16_TYPE__	    int_type;
-#elif defined _GLIBCXX_USE_C99_STDINT_TR1
-      typedef uint_least16_t    int_type;
 #else
-      typedef make_unsigned<char16_t>::type int_type;
+      typedef uint_least16_t    int_type;
 #endif
 #if _GLIBCXX_HOSTED
       typedef streamoff         off_type;
@@ -891,10 +889,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       typedef char32_t          char_type;
 #ifdef __UINT_LEAST32_TYPE__
       typedef __UINT_LEAST32_TYPE__	    int_type;
-#elif defined _GLIBCXX_USE_C99_STDINT_TR1
-      typedef uint_least32_t    int_type;
 #else
-      typedef make_unsigned<char32_t>::type int_type;
+      typedef uint_least32_t    int_type;
 #endif
 #if _GLIBCXX_HOSTED
       typedef streamoff         off_type;
diff --git a/libstdc++-v3/include/experimental/source_location b/libstdc++-v3/include/experimental/source_location
index 1dfce7343c6..ee94a36cc43 100644
--- a/libstdc++-v3/include/experimental/source_location
+++ b/libstdc++-v3/include/experimental/source_location
@@ -44,12 +44,6 @@ inline namespace fundamentals_v2 {
 
   struct source_location
   {
-#ifndef _GLIBCXX_USE_C99_STDINT_TR1
-  private:
-    using uint_least32_t = unsigned;
-  public:
-#endif
-
     // 14.1.2, source_location creation
     static constexpr source_location
     current(const char* __file = __builtin_FILE(),