Safe Haskell	Safe-Inferred
Language	Haskell2010

Data.Env.TypeParser

Description

This module provides a type class TypeParser that provides parsers for different types. The parsers are used to parse environment variables from their string representation.

Synopsis

class TypeParser a where
- parseType :: String -> Either String a

Documentation

class TypeParser a where Source #

Type class for parsers associated with types.

Minimal complete definition

Nothing

Methods

parseType :: String -> Either String a Source #

parse a value by its string representation.

default parseType :: (Generic a, GTypeParser (Rep a)) => String -> Either String a Source #

Instances

Instances details

TypeParser Int16 Source #	Required `Int16` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Int16 Source #
TypeParser Int32 Source #	Required `Int32` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Int32 Source #
TypeParser Int64 Source #	Required `Int64` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Int64 Source #
TypeParser Int8 Source #	Required `Int8` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Int8 Source #
TypeParser Word16 Source #	Required `Word16` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Word16 Source #
TypeParser Word32 Source #	Required `Word32` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Word32 Source #
TypeParser Word64 Source #	Required `Word64` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Word64 Source #
TypeParser Word8 Source #	Required `Word8` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Word8 Source #
TypeParser String Source #	Required (non-empty) String field. in POSIX systems, an empty env variable is equivalent to an undefined env variable. To ensure consistency across platforms, we require that all environment variables are non-empty.
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String String Source #
TypeParser Integer Source #	Required `Integer` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Integer Source #
TypeParser () Source #	Required `()` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String () Source #
TypeParser Bool Source #	Required `Bool` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Bool Source #
TypeParser Int Source #	Required `Int` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Int Source #
TypeParser Word Source #	Required `Word` field (parsed from String).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String Word Source #
TypeParser a => TypeParser (Maybe a) Source #	Optional fields (`Maybe a`).
Instance details Defined in Data.Env.TypeParser Methods parseType :: String -> Either String (Maybe a) Source #