Avoid std::string allocations
Avoid std::string allocations

warnes/readxl,pozypakya/readxl,nvoron23/readxl,NikhilMIT2013/readxl,warnes/readxl,rdoering/readxl,nvoron23/readxl,NikhilMIT2013/readxl,NikhilMIT2013/readxl,pozypakya/readxl,rdoering/readxl,nvoron23/readxl,pozypakya/readxl,warnes/readxl,rdoering/readxl