@@ -1,11 +1,13 @@

 (defpackage :data-lens

   (:use :cl)

+  (:import-from #:serapeum #:op #:defalias)

   (:export #:regex-match #:include #:exclude #:pick #:key-transform

            #:combine #:derive #:cumsum #:over #:on #:shortcut #:defun-ct #:key

            #:extract-key #:element #:let-fn #:juxt #:transform-tail #:slice

            #:compress-runs #:combine-matching-lists #:sorted #:applicable-when

            #:of-length #:of-min-length #:of-max-length #:transform-head

-           #:maximizing #:zipping #:applying #:transform-elt #:denest))

+           #:maximizing #:zipping #:applying #:transform-elt #:denest #:op

+           #:defalias #:<> #:<>1))

 (in-package :data-lens)

 (declaim 

@@ -279,3 +281,17 @@

                  (funcall (zipping 'vector)

                           it

                           (alexandria:iota it-length))))))))

+

+(defmacro <> (arity &rest funs)

+  (let ((arg-syms (loop repeat arity collect (gensym))))

+    `(lambda (,@arg-syms)

+       (declare (dynamic-extent ,@arg-syms))

+       ,(fw.lu:rollup-list (mapcar (lambda (x)

+                                     (etypecase x

+                                       (list `(funcall ,x))

+                                       (symbol (list x))))

+                                   funs)

+                           arg-syms))))

+

+(defmacro <>1 (&rest funs)

+  `(<> 1 ,@funs))