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Diffstat (limited to 'dev-haskell/readargs/metadata.xml')
| -rw-r--r-- | dev-haskell/readargs/metadata.xml | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/dev-haskell/readargs/metadata.xml b/dev-haskell/readargs/metadata.xml deleted file mode 100644 index b48729aeab8d..000000000000 --- a/dev-haskell/readargs/metadata.xml +++ /dev/null @@ -1,74 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd"> -<pkgmetadata> - <maintainer type="project"> - <email>haskell@gentoo.org</email> - <name>Gentoo Haskell</name> - </maintainer> - <longdescription> - ReadArgs provides the @readArgs@ IO action, which lets you tell the compiler - to parse the command line arguments to fit the type signature you give. - - For example @(a :: Int, b :: String, c :: Float) <- readArgs@ would - parse the first runtime argument as an @Int@, the second as a @String@ (no - quotes required) and the third as a @Float@. - - If the runtime arguments are incompatible with the type signature, - then a simple usage statement is given of the types needed. - - Continuing the previous example, if it was used in a - program named @Example@, the error message for the above - action would be: - - @ - usage: Example Int String Float - @ - - Any type that has both @Typeable@ and @Read@ instances - can be used. @Char@, @String@, and @Text@ are handled specially so that - command line arguments for both do not require quotes (as their - @Read@ instances do). A special instance is provided for @FilePath@ so - that no constructor or quotes are required. - - @readArgs@ also supports optional arguments and variadic arguments. - Optional arguments are specified using @Maybe@, and variadic arguments - using a list. @(a :: Int, b :: Maybe String, c :: [Float]) <- readArgs@ - would successfully parse any of the following sets of command line arguments: - - @ - Example 1 - Example 1 2 3 4 - Example 1 foo - Example 1 foo 2 3 4 - @ - - But not - - @ - Example - Example foo - Example 1.0 - @ - - Usage statements for optional and variadic arguments use command-line - parlance: - - @ - usage: Example Int [String] [Float..] - @ - - Note that both optional and variadic parsers are greedy by default - (so @Example 1 2 3 4@ was parsed as @(1, "2", [3.0,4.0])@. They - may both be made non-greedy through use of the @NonGreedy@ constructor: - - @ - ( a :: Int - , NonGreedy b :: NonGreedy Maybe String - , NonGreedy c :: NonGreedy [] Float - ) <- readArgs - @ - </longdescription> - <upstream> - <remote-id type="github">rampion/ReadArgs</remote-id> - </upstream> -</pkgmetadata> |