Mutually exclusive groupsΒΆ
A group of arguments and options can be marked as mutually exclusive using :mutex(argument_or_option, ...)
method of the Parser class.
1 2 3 4 5 6 7 8 9 10 | parser:mutex(
parser:argument "input"
:args "?",
parser:flag "--process-stdin"
)
parser:mutex(
parser:flag "-q --quiet",
parser:flag "-v --verbose"
)
|
If more than one element of a mutually exclusive group is used, an error is raised.
$ lua script.lua -qv
Usage: script.lua ([-q] | [-v]) [-h] ([<input>] | [--process-stdin])
Error: option '-v' can not be used together with option '-q'
$ lua script.lua file --process-stdin
Usage: script.lua ([-q] | [-v]) [-h] ([<input>] | [--process-stdin])
Error: option '--process-stdin' can not be used together with argument 'input'