Explicitly cast line and col variabiles to unsigned to avoid -Wsign-conversion (warnings or errors if -Werror is enabled).
This avoids unnecessary wrapper header files around backward.hpp to ignore this type of warnings or disable the warning everywhere which could be unsafe in some cases.
Explicitly cast
lineandcolvariabiles tounsignedto avoid-Wsign-conversion(warnings or errors if-Werroris enabled). This avoids unnecessary wrapper header files aroundbackward.hppto ignore this type of warnings or disable the warning everywhere which could be unsafe in some cases.