Utils.Makemodule A : Ppxlib.Ast_builder.Sval lambda : string list -> Ppxlib.expression -> Ppxlib.expressionlambda [ "x_1"; ...; "x_n" ] e is fun x1 ... x_n -> e
val arrow : Ppxlib.core_type list -> Ppxlib.core_type -> Ppxlib.core_typearrow [ "t_1"; ...; "t_n" ] u is t_1 -> ... -> t_n -> u