LamCase matches)
  = sep [ sep [text "\\case {"],
          nest 2 (pprMatches matches <+> char '}') ]

ppr_expr (
ppr_expr (HsLamCase matches)
  = sep [ sep [text "\\case {"],
          nest 2 (pprMatches matches <+> char '}') ]
ppr_expr (HsLamCase matches)
  = sep [ sep [text "\\case {"],
          nest 2 (pprMatches matches <+> char '}') ]