1GCC 4.9 (namespaces) / GCC 6 (enumerations)↩

2In progress, only integral types are supported↩

3In progress, only integral types are supported↩

4Integer support for from_chars/to_chars available in 15.7, floating-point support for from_chars ready in 15.8. Floating-point to_chars should be ready with 15.9. See STL Features and Fixes in VS 2017 15.8 | Visual C++ Team Blog.↩