InputParser with single argument (not pair)

How can I make a Inputparser to react to a single optional argument instead of a pair. For example, that I can do:

func('help')

instead of

func('help',true)

Note that 'help' is an optional argument, and I want it to be can be called in any order.

Does anybody have an idea how to do this?

Any help would be appreciated!

Answer 1

[Walter Roberson]

inputParser cannot handle that situation. Only leading arguments can be values by themselves, and those are positional, not able to appear anywhere.