Skip the positional argument if it's not valid? #2235

sefeng211 · 2020-11-29T21:38:15Z

sefeng211
Nov 29, 2020

Hi!
I am trying to make my app allows the following types of input

main <body>
main <body> [Arg1]
main <body> [Arg1] [Arg2]
main <body> [Arg2]

Arg2 is a mutliple argument
Some sample inputs are like

main "body"
main "body" Inbox (Here `Inbox` is Arg1)
main "body" Inbox +work +life (Here `+work` and `+life` are Arg2)
main "body" +work +life (Here `+work` and `+life` are Arg2)

So all arg2 arguments start with +. The issue I have is telling clap to differentiate arg1 and arg2. I wonder if I can tell clap that if the argument doesn't start with +, then start parsing the rest as arg2?

Thanks!

Answered by pksunkara

Nov 29, 2020

No it is not possible. Optional positional arguments cannot come before required positional arguments. What you can do just create one Arg1 with multiple values and do the separating on your own.

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pksunkara · 2020-11-29T21:40:45Z

pksunkara
Nov 29, 2020
Maintainer

No it is not possible. Optional positional arguments cannot come before required positional arguments. What you can do just create one Arg1 with multiple values and do the separating on your own.

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Skip the positional argument if it's not valid? #2235

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Skip the positional argument if it's not valid? #2235

sefeng211 Nov 29, 2020

Replies: 1 comment

pksunkara Nov 29, 2020 Maintainer

sefeng211
Nov 29, 2020

pksunkara
Nov 29, 2020
Maintainer