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;;; Copyright (c) 2009, Volkan YAZICI <volkan.yazici@gmail.com>
;;; All rights reserved.
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions are met:
;;; - Redistributions of source code must retain the above copyright notice,
;;; this list of conditions and the following disclaimer.
;;; - Redistributions in binary form must reproduce the above copyright notice,
;;; this list of conditions and the following disclaimer in the documentation
;;; and/or other materials provided with the distribution.
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
;;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
;;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
;;; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
;;; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
;;; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
;;; POSSIBILITY OF SUCH DAMAGE.
(in-package :patron)
(defmacro when-let ((var val) &body body)
`(let ((,var ,val))
(when ,var
,@body)))
(defmacro prog1-let ((var val) &body body)
`(let ((,var ,val))
(prog1 ,var
,@body)))
(defmacro with-unique-names ((&rest bindings) &body body)
`(let ,(mapcar
(lambda (binding)
(check-type binding (or cons symbol))
(if (consp binding)
(destructuring-bind (var x) binding
(check-type var symbol)
`(,var
(gensym
,(etypecase x
(symbol (symbol-name x))
(character (string x))
(string x)))))
`(,binding (gensym ,(symbol-name binding)))))
bindings)
,@body))
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