ghc-lib-9.0.1.20210324: The GHC API, decoupled from GHC versions
Safe HaskellNone
LanguageHaskell2010

GHC.Tc.Instance.FunDeps

Description

Functional dependencies

It's better to read it as: "if we know these, then we're going to know these"

Documentation

data FunDepEqn loc Source #

Constructors

FDEqn 

Fields

Instances

Instances details
Outputable (FunDepEqn a) Source # 
Instance details

Defined in GHC.Tc.Instance.FunDeps

Methods

ppr :: FunDepEqn a -> SDoc #

pprPrec :: Rational -> FunDepEqn a -> SDoc #

pprEquation :: FunDepEqn a -> SDoc Source #

improveFromInstEnv :: InstEnvs -> (PredType -> SrcSpan -> loc) -> PredType -> [FunDepEqn loc] Source #

improveFromAnother :: loc -> PredType -> PredType -> [FunDepEqn loc] Source #

checkInstCoverage :: Bool -> Class -> [PredType] -> [Type] -> Validity Source #

checkFunDeps :: InstEnvs -> ClsInst -> [ClsInst] Source #

pprFundeps :: Outputable a => [FunDep a] -> SDoc #