Modulebase-4.23.0.0Haskell2010

GHC.Records

This module defines the HasField class used by the OverloadedRecordDot extension. See the wiki page for more details.

Synopsis

class HasField

Packagebase-4.23.0.0
Exports1
LanguageHaskell2010
LicenceBSD-3-Clause
SourceRecords.hs

classclass HasField (x :: k) (r :: TYPE r_rep) (a :: TYPE a_rep) | x r -> a where

Constraint representing the fact that the field x belongs to the record type r and has field type a. This will be solved automatically, but manual instances may be provided as well.

Methods

getField :: r -> a
Selector function to extract the field from the record.