PatSyn
data PatSyn
mkPatSyn
patSynName
patSynArity
patSynIsInfix
patSynArgs
patSynMatcher
patSynBuilder
patSynUnivTyBinders
patSynExTyVars
patSynExTyBinders
patSynSig
patSynInstArgTys
patSynInstResTy
patSynFieldLabels
patSynFieldType
tidyPatSynIds
pprPatSynType