CODEWITHSUNDEEP
haskellcommand-line-argumentsapplicative
d8d0d65b3f7cf42
d8d0d65b3f7cf42

Reputation: 2653

how to get "leftover arguments" in optparse-applicative?

I am trying to use optparse-applicative. How can I access arguments that are not options? (From prog --foo --bar=42 baz, I want to get ["baz"])

All the the "high level" functions https://hackage.haskell.org/package/optparse-applicative-0.11.0.2/docs/Options-Applicative-Extra.html return a where I want (a,[String]).

There is some low-level function https://hackage.haskell.org/package/optparse-applicative-0.11.0.2/docs/Options-Applicative-Common.html#v:runParser but I cannot call it directly because of its type. And indeed I do want to re-use all the plumbing that is in https://hackage.haskell.org/package/optparse-applicative-0.11.0.2/docs/src/Options-Applicative-Extra.html#execParser .

Upvotes: 8

Views: 696

Answers (1)

kosmikus
kosmikus

Reputation: 19657

Positional arguments are part of the parser specification. They are not returned separately by the function that runs the parser. The functions argument and strArgument can be used to add a parser for a positional argument to the specification.

Upvotes: 6

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