clap/v3_occ_vs_vals.md

Flags

-f? -f* -f{$0,3}: flags can't be required by default, hence always 0 or more (bounded/unbounded)

Options

-o val -o val? -o val* -o val+ -o val{0,3}

(-o val){0,3} (-o val?){0,3} (-o val*){0,3} (-o val+){0,3} (-o val{0,3}){0,3}