Conferer.FetchFromConfig.Basics

Documentation

fetchFromConfigByRead :: Read a => Key -> Config -> IO (Either Text a)

fromValueWith :: (Text -> Maybe a) -> Key -> Text -> Either Text a

fetchFromConfigWith :: (Text -> Maybe a) -> Key -> Config -> IO (Either Text a)

findKeyAndApplyConfig

Arguments

:: FetchFromConfig newvalue

=> Config

Complete config

-> Key

Key that indicates the part of the config that we care about

-> Key

Key that we use to find the config (usually concatenating with the other key)

-> (newvalue -> config -> config)

Function that knows how to use the value to update the config

-> Either Text config

Result of the last config updating

-> IO (Either Text config)

Updated config

Concatenate many transformations to the config based on keys and functions

Orphan instances

FetchFromConfig Bool

Methods

fetch :: Key -> Config -> IO (Either Text Bool)

FetchFromConfig Float

Methods

fetch :: Key -> Config -> IO (Either Text Float)

FetchFromConfig Int

Methods

fetch :: Key -> Config -> IO (Either Text Int)

FetchFromConfig Integer

Methods

fetch :: Key -> Config -> IO (Either Text Integer)

FetchFromConfig String

Methods

fetch :: Key -> Config -> IO (Either Text String)

FetchFromConfig ByteString

Methods

fetch :: Key -> Config -> IO (Either Text ByteString)

FetchFromConfig Text

Methods

fetch :: Key -> Config -> IO (Either Text Text)

FetchFromConfig a => FetchFromConfig (Maybe a)

Methods

fetch :: Key -> Config -> IO (Either Text (Maybe a))