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;;;-*- Mode:Lisp; Syntax:Common-Lisp; Package:CHAOS -*-
;;;
;;; Copyright (c) 2000-2015, Toshimi Sawada. 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 AUTHOR 'AS IS' AND ANY EXPRESSED
;;; 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 AUTHOR 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 :CHAOS)
#|==============================================================================
System: Chaos
Module: comlib
File: macros.lisp
==============================================================================|#
#-:chaos-debug
(declaim (optimize (speed 3) (safety 0) #-GCL (debug 0)))
#+:chaos-debug
(declaim (optimize (speed 1) (safety 3) #-GCL (debug 3)))
;;;== DESCTIPTION ==============================================================
;;; A collection of misc utility macros.
;;; *******
;;; DECLAIM_____________________________________________________________________
;;; *******
;;;#-(or cltl2 GCL)
;;;(defmacro declaim (arg) `(proclaim ',arg))
;;; ****************
;;; FAMOUS ONCE-ONLY____________________________________________________________
;;; ****************
(defmacro once-only (vars &body body)
(let ((gensym-var (gensym))
(run-time-vars (gensym))
(run-time-vals (gensym))
(expand-time-val-forms ()))
(dolist (var vars)
(push `(if (or (symbolp ,var)
(numberp ,var)
(and (listp ,var)
(member (car ,var) '(quote function))))
,var
(let ((,gensym-var (gensym)))
(push ,gensym-var ,run-time-vars)
(push ,var ,run-time-vals)
,gensym-var))
expand-time-val-forms))
`(let* (,run-time-vars
,run-time-vals
(wrapped-body
(let ,(mapcar #'list vars (reverse expand-time-val-forms))
,@body)))
`(let ,(mapcar #'list (reverse ,run-time-vars)
(reverse ,run-time-vals))
,wrapped-body))))
;;; *********************************
;;; Specialized MEMBER/ASSOC/POSITION___________________________________________
;;; *********************************
#-:ccl
(defmacro memq (item list) `(member ,item ,list :test #'eq))
#-:ccl
(defmacro assq (item list) `(assoc ,item ,list :test #'eq))
(defmacro posq (item list) `(position ,item ,list :test #'eq))
(defmacro memeq (item list) `(member ,item ,list :test #'equal))
(defmacro asseq (item list) `(assoc ,item ,list :test #'equal))
(defmacro poseq (item list) `(position ,item ,list :test #'equal))
;;; **********
;;; CASE-EQUAL__________________________________________________________________
;;; **********
;;; same as normal `case' test by equal instead of eql.
(defmacro case-equal (keyform &rest clauses &aux (form nil) (key (gensym)))
(dolist (clause (reverse clauses) `(let ((,key ,keyform)) ,form))
#+GCL (declare (object clause))
(cond ((or (eq (car clause) 't) (eq (car clause) 'otherwise))
(setq form `(progn ,@(cdr clause))))
((consp (car clause))
(setq form `(if (member ,key ',(car clause) :test #'equal)
(progn ,@(cdr clause))
,form)))
((car clause)
(setq form `(if (equal ,key ',(car clause))
(progn ,@(cdr clause))
,form)))))
)
;;; **************
;;; DOTIMES-FIXNUM______________________________________________________________
;;; **************
;;; FROM OBJ3 implementation by Tim.Winkler of SRI.
;;; I don't know how this could be efficient in general, but for GCL(KCL..) this
;;; works well.
;;;
(defmacro dotimes-fixnum (&rest body)
(let ((var (car (car body)))
(lim (cadr (car body)))
(res (cddr (car body)))
(acts (cdr body))
(limvar (gensym))
(lab (gensym)))
` (block ()
(let* ((,limvar ,lim) (,var 0))
(declare (type fixnum ,var ,limvar))
(tagbody
,lab
(if (>= ,var ,limvar) (return (progn ,@res)))
(tagbody ,@acts)
(setf (the fixnum ,var) (the fixnum (1+ (the fixnum ,var))))
(go ,lab)))))
)
;;; ****************
;;; Syntactic Sugars____________________________________________________________
;;; ****************
(defmacro msetq (vars value)
`(multiple-value-setq ,vars ,value))
(defmacro mlet (vars value &body body)
`(multiple-value-bind ,vars ,value ,@body))
;;; let-if
;;; Binds let arguments only if condition is non-nil, and evaluates body
;;; in any case.
(defmacro let-if (condition bindings &body body)
`(if ,condition
(let ,bindings
,@body)
(progn ,@(if (eq (caar body) 'declare) (cdr body) body))))
;;; when-bind
;;; Binds the symbol to predicate and executes body only if predicate
;;; is non-nil."
(defmacro when-bind ((symbol predicate) &body body)
`(let ((,symbol ,predicate))
(when ,symbol
,@body)))
;;; while
;;; Keeps invoking the body while the test is true; test is tested before each
;;; loop.
;;;; #-(or :allegro-v6.0 :allegro-v6.1 :allegro-v6.2 :allegro-v7.0 :allegro-v8.0)
#-(or :allegro)
(defmacro while (test &body body)
(let ((end-test (gensym))
(loop (gensym)))
`(block nil
(tagbody (go ,end-test)
,loop
,@body
,end-test
(when ,test (go ,loop))
(return)))))
;;; while-not
;;; Keeps invoking the body while the test is not true; test is tested before
;;; each loop.
(defmacro while-not (test &body body)
(let ((end-test (gensym))
(loop (gensym)))
`(block nil
(tagbody (go ,end-test)
,loop
,@body
,end-test
(unless ,test (go ,loop))
(return)))))
;;; def-synonym sym1 sym2
;;;
(defmacro def-synonym (sym1 sym2)
`(setf (symbol-function ',sym1)
(symbol-function ',sym2)))
;;;
;;; #-:excl
#-(or :excl ccl)
(defmacro fixnump (num)
`(typep ,num 'fixnum))
;;; EOF
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