Improve performance by constructing yytext as a std::string o Return its contents when necessary.  In many cases, this avoids   construction of multiple copies of the yytext token.  Exceeds   performance of current develop branch.
Improve performance by constructing yytext as a std::string
o Return its contents when necessary.  In many cases, this avoids
  construction of multiple copies of the yytext token.  Exceeds
  performance of current develop branch.

kaidokert/json,kaidokert/json,nlohmann/json,kaidokert/json,theodelrieu/json,nlohmann/json,theodelrieu/json,nlohmann/json