Sourceval ppx_parser_pat :
(Ppxlib__.Import.payload,
Ppxlib__.Import.cases ->
Ppxlib__.Import.expression,
Ppxlib__.Import.expression)
Ppxlib.Ast_pattern.t Sourceval parser_extension : Ppxlib.Extension.V3.t Sourceval parser_rule : Ppxlib.Context_free.Rule.t