`sig val mk : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.core_type_desc -> Parsetree.core_type val attr : Parsetree.core_type -> Parsetree.attribute -> Parsetree.core_type val any : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> unit -> Parsetree.core_type val var : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> string -> Parsetree.core_type val arrow : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.arg_label -> Parsetree.core_type -> Parsetree.core_type -> Parsetree.core_type val tuple : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.core_type list -> Parsetree.core_type val constr : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.core_type list -> Parsetree.core_type val object_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> (string * Parsetree.attributes * Parsetree.core_type) list -> Asttypes.closed_flag -> Parsetree.core_type val class_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.core_type list -> Parsetree.core_type val alias : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.core_type -> string -> Parsetree.core_type val variant : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.row_field list -> Asttypes.closed_flag -> Asttypes.label list option -> Parsetree.core_type val poly : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> string list -> Parsetree.core_type -> Parsetree.core_type val package : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> (Ast_helper.lid * Parsetree.core_type) list -> Parsetree.core_type val extension : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.extension -> Parsetree.core_type val force_poly : Parsetree.core_type -> Parsetree.core_type end`