ppr_sig (IdSig id) = pprVarSig id (ppr (varType id))
ppr_sig (FixSig fix_sig) = ppr fix_sig
ppr_sig (SpecSig var ty inl) = pragBrackets (pprSpec var (ppr ty) inl)
ppr_sig (IdSig id) = pprVarSig id (ppr (varType id))
ppr_sig (FixSig fix_sig) = ppr fix_sig
ppr_sig (SpecSig var ty inl) = pragBrackets (pprSpec var (ppr ty) inl)