https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100146
Bug ID: 100146
Summary: __cpp_lib_to_chars not defined
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc-bugs at marehr dot dialup.fu-berlin.de
Target Milestone: ---
Hi gcc-team,
it seems that you implemented the float variants of <charconv> in gcc-11.
Is there a reason that you did not define `__cpp_lib_to_chars`?
The following code:
```cpp
#include <version>
#ifndef __cpp_lib_to_chars
#warning("__cpp_lib_to_chars NOT defined")
#endif
#include <charconv>
#ifndef __cpp_lib_to_chars
#warning("__cpp_lib_to_chars NOT defined")
#endif
#include <string_view>
int main()
{
float value;
std::string_view view{"5.55"};
std::from_chars(view.begin(), view.end(), value);
}
```
throws warnings.
https://godbolt.org/z/WK7qs84Th
Thank you!
