added required options

[zinccyy]

Hi, I added a required options feature by adding a new field parsed to the option struct and a OPT_REQUIRED flag so that every parsed option is checked after parsing so if the option is required and if it doesn't exist the program exits. Unfortunately, by the need to change the field in a struct I had to remove the const attribute of the struct parameters.

[cofyc-bot]

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[zinccyy]

/assign @cofyc

[zinccyy]

I didn't update test_argparse.c because it would then break the current tests. You use this option by providing OPT_REQUIRED flag to the option flags. For example: OPT_BOOLEAN('f', "force", &force, "force to do", NULL, 0, OPT_REQUIRED),.

[feliwir]

Hi, I added a required options feature by adding a new field parsed to the option struct and a OPT_REQUIRED flag so that every parsed option is checked after parsing so if the option is required and if it doesn't exist the program exits. Unfortunately, by the need to change the field in a struct I had to remove the const attribute of the struct parameters.

i like the design of just having to add a flag