https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79714
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is not an assignment, it's an initialization, i.e. constructor call, and
there is no std::string constructor from char. There never has been.
http://en.cppreference.com/w/cpp/string/basic_string/basic_string
If you want a std::string containing a single character then you want:
ST sSignsDot(1, c);