envy-extensible-0.2.0.1: Provides FromEnv in envy instance for Record of extensible.

Copyright(c) 2020 IIJ Innovation Institute Inc.
LicenseBSD3
MaintainerYAMAMOTO Yuji <yuji-yamamoto@iij.ad.jp>
StabilityExperimental
Safe HaskellNone
LanguageHaskell2010

Data.Extensible.Envy.Instances

Contents

Description

Provides FromEnv instance for Record.

Orphan instances

Forall (KeyTargetAre KnownSymbol (Instance1 Var h)) xs => FromEnv (RecordOf h xs) Source #

Returns recordFromEnv when the first argument of fromEnv is Nothing.

Instance details

Methods

fromEnv :: Maybe (RecordOf h xs) -> Parser (RecordOf h xs) #