Add option fir Unix/GNU CLI standard
Created by: suvorov21
Add optional support of Unix/GNu CLI interface. That mostly inherits from standard POSIX, but with the extension for long options.
Since the standard is widely used by developers I expect such an option will enrich the package. E.g. GNU getopt/optatrg works exactly like that.
E.g.:
./app.exe -abc == ./app.exe -a -b -c
./app.exe -i../test.dat == ./app.exe -i ../test.dat
./app.exe --input=../test.dat == ./app.exe --input ../test.dat
The main changes:
- Check the option upon adding to CliParser with GNU standards
- Completely independent parser function in case GNU option is on.
So far, only implementation is done, w/o documentation and examples. If you found the PR positive, I can easily add examples before merging.