Where can I find C ++ 11/14/17 support for specific versions of libstdC ++?

I recently lost a few hours of work due to the fact that the libstdC ++ version bundled with GCC 4.8 contained an incomplete C ++ 11 implementation<regex>

. I would like to know about the shortcomings of stdlib functions before I run into problems like this.

I assumed that since GCC 4.8 supports almost all C ++ 11 language features , it also implemented all C ++ 11 standard library features.

Where can I check which features of the C ++ 11/14/17 standard library are available in each libstdc ++ version that conforms to the GCC releases? The libstdc ++ status page only appears in the list of functions from the latest libstdc ++ version.