System.Console.ArgParser.Parser

Functions used to specify a parser for command line arguments.

Documentation

class ParamSpec spec where

interface allowing to define a basic block of a command line parser

Methods

getParser :: spec res -> Parser res

getParamDescr :: spec res -> [ParamDescr]

Instances

ParamSpec ParserSpec

ParamSpec StdArgParam

ParamSpec FlagParam

ParamSpec spec => ParamSpec (MetaVar spec)

ParamSpec spec => ParamSpec (Descr spec)

liftParam :: ParamSpec spec => spec res -> ParserSpec res

Converts any ParamSpec to a ParserSpec

parsedBy :: ParamSpec spec => (a -> b) -> spec a -> ParserSpec b infixl 1

Build a parser from a type constructor and a ParamSpec

MyApp `parsedBy` myparamspec

andBy :: ParamSpec spec => ParserSpec (a -> b) -> spec a -> ParserSpec b infixl 1

Build a parser from a parser and a ParamSpec

MyApp `parsedBy` myparamspec `andBy` myotherparamspec

subParser :: ParamSpec spec => (a -> b) -> spec a -> ParserSpec b infixr 3

This is parsedBy with a different fixity.