Dear maintainer:

I noticed there are some static const global variable in headers. You can search RegExp static const.*= in headers and find them.

They will bloat binary size when included into multiple translation units. e.g. https://godbolt.org/z/MsYoqTjcx

notice the const static int's ptr is different between two translation units.

I noticed this project targets c++11, which does not support inline variables. Maybe you can use extern const or a macro.