libstdc++: Add missing noexcept to std::from_chars declarations

libstdc++-v3/ChangeLog:

	* include/std/charconv (from_chars): Add noexcept to match
	definitions in src/c++17/floating_from_chars.cc

diff --git a/libstdc++-v3/include/std/charconv b/libstdc++-v3/include/std/charconv
index be668c1939e3d54d80e352ede69e99379ce7b40a..dd1ebdf832292afb09f3788bc01e77ed25a63c1e 100644 (file)
--- a/libstdc++-v3/include/std/charconv
+++ b/libstdc++-v3/include/std/charconv
@@ -691,15 +691,15 @@ namespace __detail
 #if _GLIBCXX_HAVE_USELOCALE
   from_chars_result
   from_chars(const char* __first, const char* __last, float& __value,
-            chars_format __fmt = chars_format::general);
+            chars_format __fmt = chars_format::general) noexcept;
 
   from_chars_result
   from_chars(const char* __first, const char* __last, double& __value,
-            chars_format __fmt = chars_format::general);
+            chars_format __fmt = chars_format::general) noexcept;
 
   from_chars_result
   from_chars(const char* __first, const char* __last, long double& __value,
-            chars_format __fmt = chars_format::general);
+            chars_format __fmt = chars_format::general) noexcept;
 #endif
 
 _GLIBCXX_END_NAMESPACE_VERSION