[Bug testsuite/111883] Wstringop-overflow-6.C FAILs with -std=c++26

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111883

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Did you mean like the following?  I have no idea if that's correct but is
suppresses the warnings I see.

In C++23 I don't see the code in the .ii file at all, so it doesn't warn.

--- a/libstdc++-v3/include/std/charconv
+++ b/libstdc++-v3/include/std/charconv
@@ -684,7 +684,7 @@ namespace __detail
     from_chars_result __res
       = __from_chars_float16_t(__first, __last, __val, __fmt);
     if (__res.ec == errc{})
-      __value = __val;
+      __value = _Float16(__val);
     return __res;
   }
 #endif
@@ -697,7 +697,7 @@ namespace __detail
     float __val;
     from_chars_result __res = from_chars(__first, __last, __val, __fmt);
     if (__res.ec == errc{})
-      __value = __val;
+      __value = _Float32(__val);
     return __res;
   }
 #endif
@@ -710,7 +710,7 @@ namespace __detail
     double __val;
     from_chars_result __res = from_chars(__first, __last, __val, __fmt);
     if (__res.ec == errc{})
-      __value = __val;
+      __value = _Float64(__val);
     return __res;
   }
 #endif
@@ -723,7 +723,7 @@ namespace __detail
     long double __val;
     from_chars_result __res = from_chars(__first, __last, __val, __fmt);
     if (__res.ec == errc{})
-      __value = __val;
+      __value = _Float128(__val);
     return __res;
   }
 #elif defined(__STDCPP_FLOAT128_T__) && defined(_GLIBCXX_HAVE_FLOAT128_MATH)
@@ -739,7 +739,7 @@ namespace __detail
     __extension__ __ieee128 __val;
     from_chars_result __res = from_chars(__first, __last, __val, __fmt);
     if (__res.ec == errc{})
-      __value = __val;
+      __value = _Float128(__val);
     return __res;
   }
 #else
@@ -760,7 +760,7 @@ namespace __detail
     from_chars_result __res
       = __from_chars_bfloat16_t(__first, __last, __val, __fmt);
     if (__res.ec == errc{})
-      __value = __val;
+      __value = __gnu_cxx::__bfloat16_t(__val);
     return __res;
   }
 #endif