Difference between revisions of "Command line option parsers"
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(details on parseargs) |
(details on yaop, simpleargs, ReadArgs) |
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| {{HackagePackage|id=optparse-applicative}} || X || GADT || Applicative Functor |
| {{HackagePackage|id=optparse-applicative}} || X || GADT || Applicative Functor |
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| − | | {{HackagePackage|id=parseargs}} || - || FlexibleInstances || supports a fixed set of argument types: <hask>Int, Integer, Float, Double, String, FileOpener</hask> |
+ | | {{HackagePackage|id=parseargs}} || - || FlexibleInstances (although unnecessary) || supports a fixed set of argument types: <hask>Int, Integer, Float, Double, String, FileOpener</hask> |
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| + | | {{HackagePackage|id=ReadArgs}} || - || OverlappingInstances, TypeOperators || No options, only arguments. The argument template is derived from the requested argument tuple. |
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| − | | {{HackagePackage|id=ReadArgs}} |
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| − | | {{HackagePackage|id=simpleargs}} |
+ | | {{HackagePackage|id=simpleargs}} || - || OverlappingInstances (although unnecessary) || the same as ReadArgs |
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| − | | {{HackagePackage|id=yaop}} |
+ | | {{HackagePackage|id=yaop}} || - || TemplateHaskell, GeneralizedNewtypeDeriving || wrapper around GetOpt |
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Revision as of 17:56, 7 November 2012
There are several packages that want to simplify the task of writing command line parsers. Unfortunately, they are distributed across several Hackage categories. Here is an attempt to list them:
| Package | Multi-mode | Extensions | Remark |
|---|---|---|---|
| cmdargs | X | TemplateHaskell, SYB generics, ViewPatterns, ... | unsafePerformIO
|
| cmdlib | X | SYB generics | based on GetOpt |
| cmdtheline | X | FlexibleInstances (although unnecessary) | shows help as man-page |
| console-program | X | TemplateHaskell | configure options via files |
| getflag | - | Haskell98 | like GetOpt but with Unix/Plan 9 option syntax |
| hflags | - | TemplateHaskell | inspired by Google's gflags, provides parsed options in top-level variables, allow to set options via environment variables |
| multiarg | - | CPP | long options with multiple arguments |
| options | X | TemplateHaskell | |
| optparse-applicative | X | GADT | Applicative Functor |
| parseargs | - | FlexibleInstances (although unnecessary) | supports a fixed set of argument types: Int, Integer, Float, Double, String, FileOpener
|
| ReadArgs | - | OverlappingInstances, TypeOperators | No options, only arguments. The argument template is derived from the requested argument tuple. |
| simpleargs | - | OverlappingInstances (although unnecessary) | the same as ReadArgs |
| yaop | - | TemplateHaskell, GeneralizedNewtypeDeriving | wrapper around GetOpt |
The column for required Haskell extensions gives an idea of how easy it is to port the package to compilers other than GHC.