PpxHelpers.Cty
type t = Ppxlib.class_type
val arrow : loc:Astlib.Location.t -> Astlib.Ast_500.Parsetree.core_type -> Astlib.Ast_500.Parsetree.class_type -> Astlib.Ast_500.Parsetree.class_type
val constr : loc:Astlib.Location.t -> Astlib.Longident.t -> Parsetree.core_type list -> Parsetree.class_type