System.Environment.Parser

Functions for building generic environment parsers which provide automatic documentation and easy testing.

Basic interface

run :: Parser a -> IO (Either Errors a)

test :: Parser a -> Map String String -> Either Errors a

help :: Parser a -> Dep

get :: FromEnv a => String -> Parser a

getParse :: FromEnv a => (a -> Either String b) -> String -> Parser b

json :: FromJSON a => String -> Parser a

Interface types

data Parser a

Instances

Functor Parser

Applicative Parser

newtype Errors

Constructors

Errors

Fields

getErrors :: Seq Err

Instances

Eq Errors

Ord Errors

Show Errors

Monoid Errors

data Err

Constructors

Wanted String

Joined String

Instances

Eq Err

Ord Err

Show Err

data Dep

Constructors

Succeeding

Needing String

Branching (Seq Dep)

Joining Dep

Defaulting String Dep

Instances

Eq Dep

Show Dep

references :: Dep -> [String]