;;; cl-macs.el --- Common Lisp macros -*- lexical-binding: t; coding: utf-8 -*-
-;; Copyright (C) 1993, 2001-2012 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 2001-2013 Free Software Foundation, Inc.
;; Author: Dave Gillespie <daveg@synaptics.com>
;; Version: 2.02
;; `gv' is required here because cl-macs can be loaded before loaddefs.el.
(require 'gv)
-(defmacro cl-pop2 (place)
+(defmacro cl--pop2 (place)
(declare (debug edebug-sexps))
`(prog1 (car (cdr ,place))
(setq ,place (cdr (cdr ,place)))))
-(defvar cl-optimize-safety)
-(defvar cl-optimize-speed)
+(defvar cl--optimize-safety)
+(defvar cl--optimize-speed)
;;; Initialization.
+;; Place compiler macros at the beginning, otherwise uses of the corresponding
+;; functions can lead to recursive-loads that prevent the calls from
+;; being optimized.
+
+;;;###autoload
+(defun cl--compiler-macro-list* (_form arg &rest others)
+ (let* ((args (reverse (cons arg others)))
+ (form (car args)))
+ (while (setq args (cdr args))
+ (setq form `(cons ,(car args) ,form)))
+ form))
+
+;;;###autoload
+(defun cl--compiler-macro-cXXr (form x)
+ (let* ((head (car form))
+ (n (symbol-name (car form)))
+ (i (- (length n) 2)))
+ (if (not (string-match "c[ad]+r\\'" n))
+ (if (and (fboundp head) (symbolp (symbol-function head)))
+ (cl--compiler-macro-cXXr (cons (symbol-function head) (cdr form))
+ x)
+ (error "Compiler macro for cXXr applied to non-cXXr form"))
+ (while (> i (match-beginning 0))
+ (setq x (list (if (eq (aref n i) ?a) 'car 'cdr) x))
+ (setq i (1- i)))
+ x)))
+
;;; Some predicates for analyzing Lisp forms.
;; These are used by various
;; macro expanders to optimize the results in certain common cases.
(defun cl--const-expr-val (x)
(and (macroexp-const-p x) (if (consp x) (nth 1 x) x)))
-(defun cl-expr-access-order (x v)
- ;; This apparently tries to return nil iff the expression X evaluates
- ;; the variables V in the same order as they appear in V (so as to
- ;; be able to replace those vars with the expressions they're bound
- ;; to).
- ;; FIXME: This is very naive, it doesn't even check to see if those
- ;; variables appear more than once.
- (if (macroexp-const-p x) v
- (if (consp x)
- (progn
- (while (setq x (cdr x)) (setq v (cl-expr-access-order (car x) v)))
- v)
- (if (eq x (car v)) (cdr v) '(t)))))
-
(defun cl--expr-contains (x y)
"Count number of times X refers to Y. Return nil for 0 times."
;; FIXME: This is naive, and it will cl-count Y as referred twice in
(defvar cl--bind-inits) (defvar cl--bind-lets) (defvar cl--bind-forms)
(defun cl--transform-lambda (form bind-block)
+ "Transform a function form FORM of name BIND-BLOCK.
+BIND-BLOCK is the name of the symbol to which the function will be bound,
+and which will be used for the name of the `cl-block' surrounding the
+function's body.
+FORM is of the form (ARGS . BODY)."
(let* ((args (car form)) (body (cdr form)) (orig-args args)
(cl--bind-block bind-block) (cl--bind-defs nil) (cl--bind-enquote nil)
(cl--bind-inits nil) (cl--bind-lets nil) (cl--bind-forms nil)
(header nil) (simple-args nil))
(while (or (stringp (car body))
- (memq (car-safe (car body)) '(interactive cl-declare)))
+ (memq (car-safe (car body)) '(interactive declare cl-declare)))
(push (pop body) header))
(setq args (if (listp args) (cl-copy-list args) (list '&rest args)))
(let ((p (last args))) (if (cdr p) (setcdr p (list '&rest (cdr p)))))
(require 'help-fns)
(cons (help-add-fundoc-usage
(if (stringp (car hdr)) (pop hdr))
- (format "%S"
- (cons 'fn
- (cl--make-usage-args orig-args))))
+ ;; Be careful with make-symbol and (back)quote,
+ ;; see bug#12884.
+ (let ((print-gensym nil) (print-quoted t))
+ (format "%S" (cons 'fn (cl--make-usage-args
+ orig-args)))))
hdr)))
(list `(let* ,cl--bind-lets
,@(nreverse cl--bind-forms)
(t x)))
(defun cl--make-usage-args (arglist)
- ;; `orig-args' can contain &cl-defs (an internal
- ;; CL thingy I don't understand), so remove it.
- (let ((x (memq '&cl-defs arglist)))
- (when x (setq arglist (delq (car x) (remq (cadr x) arglist)))))
- (let ((state nil))
- (mapcar (lambda (x)
- (cond
- ((symbolp x)
- (if (eq ?\& (aref (symbol-name x) 0))
- (setq state x)
- (make-symbol (upcase (symbol-name x)))))
- ((not (consp x)) x)
- ((memq state '(nil &rest)) (cl--make-usage-args x))
- (t ;(VAR INITFORM SVAR) or ((KEYWORD VAR) INITFORM SVAR).
- (cl-list*
- (if (and (consp (car x)) (eq state '&key))
- (list (caar x) (cl--make-usage-var (nth 1 (car x))))
- (cl--make-usage-var (car x)))
- (nth 1 x) ;INITFORM.
- (cl--make-usage-args (nthcdr 2 x)) ;SVAR.
- ))))
- arglist)))
+ (if (cdr-safe (last arglist)) ;Not a proper list.
+ (let* ((last (last arglist))
+ (tail (cdr last)))
+ (unwind-protect
+ (progn
+ (setcdr last nil)
+ (nconc (cl--make-usage-args arglist) (cl--make-usage-var tail)))
+ (setcdr last tail)))
+ ;; `orig-args' can contain &cl-defs (an internal
+ ;; CL thingy I don't understand), so remove it.
+ (let ((x (memq '&cl-defs arglist)))
+ (when x (setq arglist (delq (car x) (remq (cadr x) arglist)))))
+ (let ((state nil))
+ (mapcar (lambda (x)
+ (cond
+ ((symbolp x)
+ (let ((first (aref (symbol-name x) 0)))
+ (if (eq ?\& first)
+ (setq state x)
+ ;; Strip a leading underscore, since it only
+ ;; means that this argument is unused.
+ (make-symbol (upcase (if (eq ?_ first)
+ (substring (symbol-name x) 1)
+ (symbol-name x)))))))
+ ((not (consp x)) x)
+ ((memq state '(nil &rest)) (cl--make-usage-args x))
+ (t ;(VAR INITFORM SVAR) or ((KEYWORD VAR) INITFORM SVAR).
+ (cl-list*
+ (if (and (consp (car x)) (eq state '&key))
+ (list (caar x) (cl--make-usage-var (nth 1 (car x))))
+ (cl--make-usage-var (car x)))
+ (nth 1 x) ;INITFORM.
+ (cl--make-usage-args (nthcdr 2 x)) ;SVAR.
+ ))))
+ arglist))))
(defun cl--do-arglist (args expr &optional num) ; uses bind-*
(if (nlistp args)
(if (memq '&environment args) (error "&environment used incorrectly"))
(let ((save-args args)
(restarg (memq '&rest args))
- (safety (if (cl--compiling-file) cl-optimize-safety 3))
+ (safety (if (cl--compiling-file) cl--optimize-safety 3))
(keys nil)
(laterarg nil) (exactarg nil) minarg)
(or num (setq num 0))
(setq restarg (cadr restarg)))
(push (list restarg expr) cl--bind-lets)
(if (eq (car args) '&whole)
- (push (list (cl-pop2 args) restarg) cl--bind-lets))
+ (push (list (cl--pop2 args) restarg) cl--bind-lets))
(let ((p args))
(setq minarg restarg)
(while (and p (not (memq (car p) cl--lambda-list-keywords)))
(if def `(if ,restarg ,poparg ,def) poparg))
(setq num (1+ num))))))
(if (eq (car args) '&rest)
- (let ((arg (cl-pop2 args)))
+ (let ((arg (cl--pop2 args)))
(if (consp arg) (cl--do-arglist arg restarg)))
(or (eq (car args) '&key) (= safety 0) exactarg
(push `(if ,restarg
(let ((arg (pop args)))
(or (consp arg) (setq arg (list arg)))
(let* ((karg (if (consp (car arg)) (caar arg)
- (intern (format ":%s" (car arg)))))
+ (let ((name (symbol-name (car arg))))
+ ;; Strip a leading underscore, since it only
+ ;; means that this argument is unused, but
+ ;; shouldn't affect the key's name (bug#12367).
+ (if (eq ?_ (aref name 0))
+ (setq name (substring name 1)))
+ (intern (format ":%s" name)))))
(varg (if (consp (car arg)) (cl-cadar arg) (car arg)))
(def (if (cdr arg) (cadr arg)
(or (car cl--bind-defs) (cadr (assq varg cl--bind-defs)))))
;;;###autoload
(defmacro cl-destructuring-bind (args expr &rest body)
+ "Bind the variables in ARGS to the result of EXPR and execute BODY."
(declare (indent 2)
(debug (&define cl-macro-list def-form cl-declarations def-body)))
(let* ((cl--bind-lets nil) (cl--bind-forms nil) (cl--bind-inits nil)
;;; The `cl-eval-when' form.
-(defvar cl-not-toplevel nil)
+(defvar cl--not-toplevel nil)
;;;###autoload
(defmacro cl-eval-when (when &rest body)
\(fn (WHEN...) BODY...)"
(declare (indent 1) (debug ((&rest &or "compile" "load" "eval") body)))
(if (and (fboundp 'cl--compiling-file) (cl--compiling-file)
- (not cl-not-toplevel) (not (boundp 'for-effect))) ; horrible kludge
+ (not cl--not-toplevel) (not (boundp 'for-effect))) ;Horrible kludge.
(let ((comp (or (memq 'compile when) (memq :compile-toplevel when)))
- (cl-not-toplevel t))
+ (cl--not-toplevel t))
(if (or (memq 'load when) (memq :load-toplevel when))
(if comp (cons 'progn (mapcar 'cl--compile-time-too body))
`(if nil nil ,@body))
;;;###autoload
(defmacro cl-ecase (expr &rest clauses)
- "Like `cl-case', but error if no cl-case fits.
+ "Like `cl-case', but error if no case fits.
`otherwise'-clauses are not allowed.
\n(fn EXPR (KEYLIST BODY...)...)"
(declare (indent 1) (debug cl-case))
(defvar cl--loop-first-flag)
(defvar cl--loop-initially) (defvar cl--loop-map-form) (defvar cl--loop-name)
(defvar cl--loop-result) (defvar cl--loop-result-explicit)
-(defvar cl--loop-result-var) (defvar cl--loop-steps) (defvar cl--loop-symbol-macs)
+(defvar cl--loop-result-var) (defvar cl--loop-steps)
+(defvar cl--loop-symbol-macs)
;;;###autoload
(defmacro cl-loop (&rest loop-args)
- "The Common Lisp `cl-loop' macro.
+ "The Common Lisp `loop' macro.
Valid clauses are:
for VAR from/upfrom/downfrom NUM to/upto/downto/above/below NUM by NUM,
for VAR in LIST by FUNC, for VAR on LIST by FUNC, for VAR = INIT then EXPR,
finally return EXPR, named NAME.
\(fn CLAUSE...)"
- (declare (debug (&rest &or symbolp form)))
- (if (not (memq t (mapcar 'symbolp (delq nil (delq t (cl-copy-list loop-args))))))
+ (declare (debug (&rest &or
+ ;; These are usually followed by a symbol, but it can
+ ;; actually be any destructuring-bind pattern, which
+ ;; would erroneously match `form'.
+ [[&or "for" "as" "with" "and"] sexp]
+ ;; These are followed by expressions which could
+ ;; erroneously match `symbolp'.
+ [[&or "from" "upfrom" "downfrom" "to" "upto" "downto"
+ "above" "below" "by" "in" "on" "=" "across"
+ "repeat" "while" "until" "always" "never"
+ "thereis" "collect" "append" "nconc" "sum"
+ "count" "maximize" "minimize" "if" "unless"
+ "return"] form]
+ ;; Simple default, which covers 99% of the cases.
+ symbolp form)))
+ (if (not (memq t (mapcar #'symbolp
+ (delq nil (delq t (cl-copy-list loop-args))))))
`(cl-block nil (while t ,@loop-args))
(let ((cl--loop-args loop-args) (cl--loop-name nil) (cl--loop-bindings nil)
(cl--loop-body nil) (cl--loop-steps nil)
(cl--loop-map-form nil) (cl--loop-first-flag nil)
(cl--loop-destr-temps nil) (cl--loop-symbol-macs nil))
(setq cl--loop-args (append cl--loop-args '(cl-end-loop)))
- (while (not (eq (car cl--loop-args) 'cl-end-loop)) (cl-parse-loop-clause))
+ (while (not (eq (car cl--loop-args) 'cl-end-loop))
+ (cl--parse-loop-clause))
(if cl--loop-finish-flag
(push `((,cl--loop-finish-flag t)) cl--loop-bindings))
(if cl--loop-first-flag
(progn (push `((,cl--loop-first-flag t)) cl--loop-bindings)
(push `(setq ,cl--loop-first-flag nil) cl--loop-steps)))
(let* ((epilogue (nconc (nreverse cl--loop-finally)
- (list (or cl--loop-result-explicit cl--loop-result))))
+ (list (or cl--loop-result-explicit
+ cl--loop-result))))
(ands (cl--loop-build-ands (nreverse cl--loop-body)))
(while-body (nconc (cadr ands) (nreverse cl--loop-steps)))
(body (append
`((if ,cl--loop-finish-flag
(progn ,@epilogue) ,cl--loop-result-var)))
epilogue))))
- (if cl--loop-result-var (push (list cl--loop-result-var) cl--loop-bindings))
+ (if cl--loop-result-var
+ (push (list cl--loop-result-var) cl--loop-bindings))
(while cl--loop-bindings
(if (cdar cl--loop-bindings)
(setq body (list (cl--loop-let (pop cl--loop-bindings) body t)))
(push (car (pop cl--loop-bindings)) lets))
(setq body (list (cl--loop-let lets body nil))))))
(if cl--loop-symbol-macs
- (setq body (list `(cl-symbol-macrolet ,cl--loop-symbol-macs ,@body))))
+ (setq body
+ (list `(cl-symbol-macrolet ,cl--loop-symbol-macs ,@body))))
`(cl-block ,cl--loop-name ,@body)))))
;; Below is a complete spec for cl-loop, in several parts that correspond
-(defun cl-parse-loop-clause () ; uses loop-*
+(defun cl--parse-loop-clause () ; uses loop-*
(let ((word (pop cl--loop-args))
(hash-types '(hash-key hash-keys hash-value hash-values))
(key-types '(key-code key-codes key-seq key-seqs
((eq word 'initially)
(if (memq (car cl--loop-args) '(do doing)) (pop cl--loop-args))
- (or (consp (car cl--loop-args)) (error "Syntax error on `initially' clause"))
+ (or (consp (car cl--loop-args))
+ (error "Syntax error on `initially' clause"))
(while (consp (car cl--loop-args))
(push (pop cl--loop-args) cl--loop-initially)))
((eq word 'finally)
(if (eq (car cl--loop-args) 'return)
- (setq cl--loop-result-explicit (or (cl-pop2 cl--loop-args) '(quote nil)))
+ (setq cl--loop-result-explicit
+ (or (cl--pop2 cl--loop-args) '(quote nil)))
(if (memq (car cl--loop-args) '(do doing)) (pop cl--loop-args))
- (or (consp (car cl--loop-args)) (error "Syntax error on `finally' clause"))
+ (or (consp (car cl--loop-args))
+ (error "Syntax error on `finally' clause"))
(if (and (eq (caar cl--loop-args) 'return) (null cl--loop-name))
- (setq cl--loop-result-explicit (or (nth 1 (pop cl--loop-args)) '(quote nil)))
+ (setq cl--loop-result-explicit
+ (or (nth 1 (pop cl--loop-args)) '(quote nil)))
(while (consp (car cl--loop-args))
(push (pop cl--loop-args) cl--loop-finally)))))
(if (eq word 'being) (setq word (pop cl--loop-args)))
(if (memq word '(the each)) (setq word (pop cl--loop-args)))
(if (memq word '(buffer buffers))
- (setq word 'in cl--loop-args (cons '(buffer-list) cl--loop-args)))
+ (setq word 'in
+ cl--loop-args (cons '(buffer-list) cl--loop-args)))
(cond
((memq word '(from downfrom upfrom to downto upto
(if (memq (car cl--loop-args) '(downto above))
(error "Must specify `from' value for downward cl-loop"))
(let* ((down (or (eq (car cl--loop-args) 'downfrom)
- (memq (cl-caddr cl--loop-args) '(downto above))))
+ (memq (cl-caddr cl--loop-args)
+ '(downto above))))
(excl (or (memq (car cl--loop-args) '(above below))
- (memq (cl-caddr cl--loop-args) '(above below))))
- (start (and (memq (car cl--loop-args) '(from upfrom downfrom))
- (cl-pop2 cl--loop-args)))
+ (memq (cl-caddr cl--loop-args)
+ '(above below))))
+ (start (and (memq (car cl--loop-args)
+ '(from upfrom downfrom))
+ (cl--pop2 cl--loop-args)))
(end (and (memq (car cl--loop-args)
'(to upto downto above below))
- (cl-pop2 cl--loop-args)))
- (step (and (eq (car cl--loop-args) 'by) (cl-pop2 cl--loop-args)))
+ (cl--pop2 cl--loop-args)))
+ (step (and (eq (car cl--loop-args) 'by)
+ (cl--pop2 cl--loop-args)))
(end-var (and (not (macroexp-const-p end))
(make-symbol "--cl-var--")))
(step-var (and (not (macroexp-const-p step))
loop-for-sets))))
(push (list temp
(if (eq (car cl--loop-args) 'by)
- (let ((step (cl-pop2 cl--loop-args)))
+ (let ((step (cl--pop2 cl--loop-args)))
(if (and (memq (car-safe step)
'(quote function
cl-function))
((eq word '=)
(let* ((start (pop cl--loop-args))
- (then (if (eq (car cl--loop-args) 'then) (cl-pop2 cl--loop-args) start)))
+ (then (if (eq (car cl--loop-args) 'then)
+ (cl--pop2 cl--loop-args) start)))
(push (list var nil) loop-for-bindings)
(if (or ands (eq (car cl--loop-args) 'and))
(progn
(let ((ref (or (memq (car cl--loop-args) '(in-ref of-ref))
(and (not (memq (car cl--loop-args) '(in of)))
(error "Expected `of'"))))
- (seq (cl-pop2 cl--loop-args))
+ (seq (cl--pop2 cl--loop-args))
(temp-seq (make-symbol "--cl-seq--"))
- (temp-idx (if (eq (car cl--loop-args) 'using)
- (if (and (= (length (cadr cl--loop-args)) 2)
- (eq (cl-caadr cl--loop-args) 'index))
- (cadr (cl-pop2 cl--loop-args))
- (error "Bad `using' clause"))
- (make-symbol "--cl-idx--"))))
+ (temp-idx
+ (if (eq (car cl--loop-args) 'using)
+ (if (and (= (length (cadr cl--loop-args)) 2)
+ (eq (cl-caadr cl--loop-args) 'index))
+ (cadr (cl--pop2 cl--loop-args))
+ (error "Bad `using' clause"))
+ (make-symbol "--cl-idx--"))))
(push (list temp-seq seq) loop-for-bindings)
(push (list temp-idx 0) loop-for-bindings)
(if ref
loop-for-steps)))
((memq word hash-types)
- (or (memq (car cl--loop-args) '(in of)) (error "Expected `of'"))
- (let* ((table (cl-pop2 cl--loop-args))
- (other (if (eq (car cl--loop-args) 'using)
- (if (and (= (length (cadr cl--loop-args)) 2)
- (memq (cl-caadr cl--loop-args) hash-types)
- (not (eq (cl-caadr cl--loop-args) word)))
- (cadr (cl-pop2 cl--loop-args))
- (error "Bad `using' clause"))
- (make-symbol "--cl-var--"))))
+ (or (memq (car cl--loop-args) '(in of))
+ (error "Expected `of'"))
+ (let* ((table (cl--pop2 cl--loop-args))
+ (other
+ (if (eq (car cl--loop-args) 'using)
+ (if (and (= (length (cadr cl--loop-args)) 2)
+ (memq (cl-caadr cl--loop-args) hash-types)
+ (not (eq (cl-caadr cl--loop-args) word)))
+ (cadr (cl--pop2 cl--loop-args))
+ (error "Bad `using' clause"))
+ (make-symbol "--cl-var--"))))
(if (memq word '(hash-value hash-values))
(setq var (prog1 other (setq other var))))
(setq cl--loop-map-form
((memq word '(symbol present-symbol external-symbol
symbols present-symbols external-symbols))
- (let ((ob (and (memq (car cl--loop-args) '(in of)) (cl-pop2 cl--loop-args))))
+ (let ((ob (and (memq (car cl--loop-args) '(in of))
+ (cl--pop2 cl--loop-args))))
(setq cl--loop-map-form
`(mapatoms (lambda (,var) . --cl-map) ,ob))))
((memq word '(overlay overlays extent extents))
(let ((buf nil) (from nil) (to nil))
(while (memq (car cl--loop-args) '(in of from to))
- (cond ((eq (car cl--loop-args) 'from) (setq from (cl-pop2 cl--loop-args)))
- ((eq (car cl--loop-args) 'to) (setq to (cl-pop2 cl--loop-args)))
- (t (setq buf (cl-pop2 cl--loop-args)))))
+ (cond ((eq (car cl--loop-args) 'from)
+ (setq from (cl--pop2 cl--loop-args)))
+ ((eq (car cl--loop-args) 'to)
+ (setq to (cl--pop2 cl--loop-args)))
+ (t (setq buf (cl--pop2 cl--loop-args)))))
(setq cl--loop-map-form
`(cl--map-overlays
(lambda (,var ,(make-symbol "--cl-var--"))
(var1 (make-symbol "--cl-var1--"))
(var2 (make-symbol "--cl-var2--")))
(while (memq (car cl--loop-args) '(in of property from to))
- (cond ((eq (car cl--loop-args) 'from) (setq from (cl-pop2 cl--loop-args)))
- ((eq (car cl--loop-args) 'to) (setq to (cl-pop2 cl--loop-args)))
+ (cond ((eq (car cl--loop-args) 'from)
+ (setq from (cl--pop2 cl--loop-args)))
+ ((eq (car cl--loop-args) 'to)
+ (setq to (cl--pop2 cl--loop-args)))
((eq (car cl--loop-args) 'property)
- (setq prop (cl-pop2 cl--loop-args)))
- (t (setq buf (cl-pop2 cl--loop-args)))))
+ (setq prop (cl--pop2 cl--loop-args)))
+ (t (setq buf (cl--pop2 cl--loop-args)))))
(if (and (consp var) (symbolp (car var)) (symbolp (cdr var)))
(setq var1 (car var) var2 (cdr var))
(push (list var `(cons ,var1 ,var2)) loop-for-sets))
,buf ,prop ,from ,to))))
((memq word key-types)
- (or (memq (car cl--loop-args) '(in of)) (error "Expected `of'"))
- (let ((cl-map (cl-pop2 cl--loop-args))
- (other (if (eq (car cl--loop-args) 'using)
- (if (and (= (length (cadr cl--loop-args)) 2)
- (memq (cl-caadr cl--loop-args) key-types)
- (not (eq (cl-caadr cl--loop-args) word)))
- (cadr (cl-pop2 cl--loop-args))
- (error "Bad `using' clause"))
- (make-symbol "--cl-var--"))))
+ (or (memq (car cl--loop-args) '(in of))
+ (error "Expected `of'"))
+ (let ((cl-map (cl--pop2 cl--loop-args))
+ (other
+ (if (eq (car cl--loop-args) 'using)
+ (if (and (= (length (cadr cl--loop-args)) 2)
+ (memq (cl-caadr cl--loop-args) key-types)
+ (not (eq (cl-caadr cl--loop-args) word)))
+ (cadr (cl--pop2 cl--loop-args))
+ (error "Bad `using' clause"))
+ (make-symbol "--cl-var--"))))
(if (memq word '(key-binding key-bindings))
(setq var (prog1 other (setq other var))))
(setq cl--loop-map-form
loop-for-steps)))
((memq word '(window windows))
- (let ((scr (and (memq (car cl--loop-args) '(in of)) (cl-pop2 cl--loop-args)))
+ (let ((scr (and (memq (car cl--loop-args) '(in of))
+ (cl--pop2 cl--loop-args)))
(temp (make-symbol "--cl-var--"))
(minip (make-symbol "--cl-minip--")))
(push (list var (if scr
loop-for-steps)))
(t
+ ;; This is an advertised interface: (info "(cl)Other Clauses").
(let ((handler (and (symbolp word)
- (get word 'cl--loop-for-handler))))
+ (get word 'cl-loop-for-handler))))
(if handler
(funcall handler var)
(error "Expected a `for' preposition, found %s" word)))))
((memq word '(minimize minimizing maximize maximizing))
(let* ((what (pop cl--loop-args))
- (temp (if (cl--simple-expr-p what) what (make-symbol "--cl-var--")))
+ (temp (if (cl--simple-expr-p what) what
+ (make-symbol "--cl-var--")))
(var (cl--loop-handle-accum nil))
(func (intern (substring (symbol-name word) 0 3)))
(set `(setq ,var (if ,var (,func ,var ,temp) ,temp))))
((eq word 'with)
(let ((bindings nil))
(while (progn (push (list (pop cl--loop-args)
- (and (eq (car cl--loop-args) '=) (cl-pop2 cl--loop-args)))
+ (and (eq (car cl--loop-args) '=)
+ (cl--pop2 cl--loop-args)))
bindings)
(eq (car cl--loop-args) 'and))
(pop cl--loop-args))
(push `(not ,(pop cl--loop-args)) cl--loop-body))
((eq word 'always)
- (or cl--loop-finish-flag (setq cl--loop-finish-flag (make-symbol "--cl-flag--")))
+ (or cl--loop-finish-flag
+ (setq cl--loop-finish-flag (make-symbol "--cl-flag--")))
(push `(setq ,cl--loop-finish-flag ,(pop cl--loop-args)) cl--loop-body)
(setq cl--loop-result t))
((eq word 'never)
- (or cl--loop-finish-flag (setq cl--loop-finish-flag (make-symbol "--cl-flag--")))
+ (or cl--loop-finish-flag
+ (setq cl--loop-finish-flag (make-symbol "--cl-flag--")))
(push `(setq ,cl--loop-finish-flag (not ,(pop cl--loop-args)))
cl--loop-body)
(setq cl--loop-result t))
((eq word 'thereis)
- (or cl--loop-finish-flag (setq cl--loop-finish-flag (make-symbol "--cl-flag--")))
- (or cl--loop-result-var (setq cl--loop-result-var (make-symbol "--cl-var--")))
+ (or cl--loop-finish-flag
+ (setq cl--loop-finish-flag (make-symbol "--cl-flag--")))
+ (or cl--loop-result-var
+ (setq cl--loop-result-var (make-symbol "--cl-var--")))
(push `(setq ,cl--loop-finish-flag
(not (setq ,cl--loop-result-var ,(pop cl--loop-args))))
cl--loop-body))
((memq word '(if when unless))
(let* ((cond (pop cl--loop-args))
(then (let ((cl--loop-body nil))
- (cl-parse-loop-clause)
+ (cl--parse-loop-clause)
(cl--loop-build-ands (nreverse cl--loop-body))))
(else (let ((cl--loop-body nil))
(if (eq (car cl--loop-args) 'else)
- (progn (pop cl--loop-args) (cl-parse-loop-clause)))
+ (progn (pop cl--loop-args) (cl--parse-loop-clause)))
(cl--loop-build-ands (nreverse cl--loop-body))))
(simple (and (eq (car then) t) (eq (car else) t))))
(if (eq (car cl--loop-args) 'end) (pop cl--loop-args))
(push (cons 'progn (nreverse (cons t body))) cl--loop-body)))
((eq word 'return)
- (or cl--loop-finish-flag (setq cl--loop-finish-flag (make-symbol "--cl-var--")))
- (or cl--loop-result-var (setq cl--loop-result-var (make-symbol "--cl-var--")))
+ (or cl--loop-finish-flag
+ (setq cl--loop-finish-flag (make-symbol "--cl-var--")))
+ (or cl--loop-result-var
+ (setq cl--loop-result-var (make-symbol "--cl-var--")))
(push `(setq ,cl--loop-result-var ,(pop cl--loop-args)
,cl--loop-finish-flag nil) cl--loop-body))
(t
- (let ((handler (and (symbolp word) (get word 'cl--loop-handler))))
+ ;; This is an advertised interface: (info "(cl)Other Clauses").
+ (let ((handler (and (symbolp word) (get word 'cl-loop-handler))))
(or handler (error "Expected a cl-loop keyword, found %s" word))
(funcall handler))))
(if (eq (car cl--loop-args) 'and)
- (progn (pop cl--loop-args) (cl-parse-loop-clause)))))
+ (progn (pop cl--loop-args) (cl--parse-loop-clause)))))
(defun cl--loop-let (specs body par) ; uses loop-*
(let ((p specs) (temps nil) (new nil))
(if (and (consp (car specs)) (listp (caar specs)))
(let* ((spec (caar specs)) (nspecs nil)
(expr (cadr (pop specs)))
- (temp (cdr (or (assq spec cl--loop-destr-temps)
- (car (push (cons spec (or (last spec 0)
- (make-symbol "--cl-var--")))
- cl--loop-destr-temps))))))
+ (temp
+ (cdr (or (assq spec cl--loop-destr-temps)
+ (car (push (cons spec
+ (or (last spec 0)
+ (make-symbol "--cl-var--")))
+ cl--loop-destr-temps))))))
(push (list temp expr) new)
(while (consp spec)
(push (list (pop spec)
(setq specs (nconc (nreverse nspecs) specs)))
(push (pop specs) new)))
(if (eq body 'setq)
- (let ((set (cons (if par 'cl-psetq 'setq) (apply 'nconc (nreverse new)))))
+ (let ((set (cons (if par 'cl-psetq 'setq)
+ (apply 'nconc (nreverse new)))))
(if temps `(let* ,(nreverse temps) ,set) set))
`(,(if par 'let 'let*)
,(nconc (nreverse temps) (nreverse new)) ,@body))))
-(defun cl--loop-handle-accum (def &optional func) ; uses loop-*
+(defun cl--loop-handle-accum (def &optional func) ; uses loop-*
(if (eq (car cl--loop-args) 'into)
- (let ((var (cl-pop2 cl--loop-args)))
+ (let ((var (cl--pop2 cl--loop-args)))
(or (memq var cl--loop-accum-vars)
(progn (push (list (list var def)) cl--loop-bindings)
(push var cl--loop-accum-vars)))
var)
(or cl--loop-accum-var
(progn
- (push (list (list (setq cl--loop-accum-var (make-symbol "--cl-var--")) def))
- cl--loop-bindings)
+ (push (list (list
+ (setq cl--loop-accum-var (make-symbol "--cl-var--"))
+ def))
+ cl--loop-bindings)
(setq cl--loop-result (if func (list func cl--loop-accum-var)
- cl--loop-accum-var))
+ cl--loop-accum-var))
cl--loop-accum-var))))
(defun cl--loop-build-ands (clauses)
+ "Return various representations of (and . CLAUSES).
+CLAUSES is a list of Elisp expressions, where clauses of the form
+\(progn E1 E2 E3 .. t) are the focus of particular optimizations.
+The return value has shape (COND BODY COMBO)
+such that COMBO is equivalent to (and . CLAUSES)."
(let ((ands nil)
(body nil))
+ ;; Look through `clauses', trying to optimize (progn ,@A t) (progn ,@B) ,@C
+ ;; into (progn ,@A ,@B) ,@C.
(while clauses
(if (and (eq (car-safe (car clauses)) 'progn)
(eq (car (last (car clauses))) t))
(cl-cdadr clauses)
(list (cadr clauses))))
(cddr clauses)))
+ ;; A final (progn ,@A t) is moved outside of the `and'.
(setq body (cdr (butlast (pop clauses)))))
(push (pop clauses) ands)))
(setq ands (or (nreverse ands) (list t)))
;;;###autoload
(defmacro cl-do (steps endtest &rest body)
- "The Common Lisp `cl-do' loop.
+ "The Common Lisp `do' loop.
\(fn ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
(declare (indent 2)
((&rest &or symbolp (symbolp &optional form form))
(form body)
cl-declarations body)))
- (cl-expand-do-loop steps endtest body nil))
+ (cl--expand-do-loop steps endtest body nil))
;;;###autoload
(defmacro cl-do* (steps endtest &rest body)
- "The Common Lisp `cl-do*' loop.
+ "The Common Lisp `do*' loop.
\(fn ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
(declare (indent 2) (debug cl-do))
- (cl-expand-do-loop steps endtest body t))
+ (cl--expand-do-loop steps endtest body t))
-(defun cl-expand-do-loop (steps endtest body star)
+(defun cl--expand-do-loop (steps endtest body star)
`(cl-block nil
(,(if star 'let* 'let)
,(mapcar (lambda (c) (if (consp c) (list (car c) (nth 1 c)) c))
An implicit nil block is established around the loop.
\(fn (VAR LIST [RESULT]) BODY...)"
- (declare (debug ((symbolp form &optional form) cl-declarations body)))
- (let ((temp (make-symbol "--cl-dolist-temp--")))
- ;; FIXME: Copy&pasted from subr.el.
- `(cl-block nil
- ;; This is not a reliable test, but it does not matter because both
- ;; semantics are acceptable, tho one is slightly faster with dynamic
- ;; scoping and the other is slightly faster (and has cleaner semantics)
- ;; with lexical scoping.
- ,(if lexical-binding
- `(let ((,temp ,(nth 1 spec)))
- (while ,temp
- (let ((,(car spec) (car ,temp)))
- ,@body
- (setq ,temp (cdr ,temp))))
- ,@(if (cdr (cdr spec))
- ;; FIXME: This let often leads to "unused var" warnings.
- `((let ((,(car spec) nil)) ,@(cdr (cdr spec))))))
- `(let ((,temp ,(nth 1 spec))
- ,(car spec))
- (while ,temp
- (setq ,(car spec) (car ,temp))
- ,@body
- (setq ,temp (cdr ,temp)))
- ,@(if (cdr (cdr spec))
- `((setq ,(car spec) nil) ,@(cddr spec))))))))
+ (declare (debug ((symbolp form &optional form) cl-declarations body))
+ (indent 1))
+ (let ((loop `(dolist ,spec ,@body)))
+ (if (advice-member-p #'cl--wrap-in-nil-block 'dolist)
+ loop `(cl-block nil ,loop))))
;;;###autoload
(defmacro cl-dotimes (spec &rest body)
nil.
\(fn (VAR COUNT [RESULT]) BODY...)"
- (declare (debug cl-dolist))
- (let ((temp (make-symbol "--cl-dotimes-temp--"))
- (end (nth 1 spec)))
- ;; FIXME: Copy&pasted from subr.el.
- `(cl-block nil
- ;; This is not a reliable test, but it does not matter because both
- ;; semantics are acceptable, tho one is slightly faster with dynamic
- ;; scoping and the other has cleaner semantics.
- ,(if lexical-binding
- (let ((counter '--dotimes-counter--))
- `(let ((,temp ,end)
- (,counter 0))
- (while (< ,counter ,temp)
- (let ((,(car spec) ,counter))
- ,@body)
- (setq ,counter (1+ ,counter)))
- ,@(if (cddr spec)
- ;; FIXME: This let often leads to "unused var" warnings.
- `((let ((,(car spec) ,counter)) ,@(cddr spec))))))
- `(let ((,temp ,end)
- (,(car spec) 0))
- (while (< ,(car spec) ,temp)
- ,@body
- (cl-incf ,(car spec)))
- ,@(cdr (cdr spec)))))))
+ (declare (debug cl-dolist) (indent 1))
+ (let ((loop `(dotimes ,spec ,@body)))
+ (if (advice-member-p #'cl--wrap-in-nil-block 'dotimes)
+ loop `(cl-block nil ,loop))))
+
+(defvar cl--tagbody-alist nil)
+
+;;;###autoload
+(defmacro cl-tagbody (&rest labels-or-stmts)
+ "Execute statements while providing for control transfers to labels.
+Each element of LABELS-OR-STMTS can be either a label (integer or symbol)
+or a `cons' cell, in which case it's taken to be a statement.
+This distinction is made before performing macroexpansion.
+Statements are executed in sequence left to right, discarding any return value,
+stopping only when reaching the end of LABELS-OR-STMTS.
+Any statement can transfer control at any time to the statements that follow
+one of the labels with the special form (go LABEL).
+Labels have lexical scope and dynamic extent."
+ (let ((blocks '())
+ (first-label (if (consp (car labels-or-stmts))
+ 'cl--preamble (pop labels-or-stmts))))
+ (let ((block (list first-label)))
+ (dolist (label-or-stmt labels-or-stmts)
+ (if (consp label-or-stmt) (push label-or-stmt block)
+ ;; Add a "go to next block" to implement the fallthrough.
+ (unless (eq 'go (car-safe (car-safe block)))
+ (push `(go ,label-or-stmt) block))
+ (push (nreverse block) blocks)
+ (setq block (list label-or-stmt))))
+ (unless (eq 'go (car-safe (car-safe block)))
+ (push `(go cl--exit) block))
+ (push (nreverse block) blocks))
+ (let ((catch-tag (make-symbol "cl--tagbody-tag")))
+ (push (cons 'cl--exit catch-tag) cl--tagbody-alist)
+ (dolist (block blocks)
+ (push (cons (car block) catch-tag) cl--tagbody-alist))
+ (macroexpand-all
+ `(let ((next-label ',first-label))
+ (while
+ (not (eq (setq next-label
+ (catch ',catch-tag
+ (cl-case next-label
+ ,@blocks)))
+ 'cl--exit))))
+ `((go . ,(lambda (label)
+ (let ((catch-tag (cdr (assq label cl--tagbody-alist))))
+ (unless catch-tag
+ (error "Unknown cl-tagbody go label `%S'" label))
+ `(throw ',catch-tag ',label))))
+ ,@macroexpand-all-environment)))))
;;;###autoload
(defmacro cl-do-symbols (spec &rest body)
;;;###autoload
(defmacro cl-do-all-symbols (spec &rest body)
+ "Like `cl-do-symbols', but use the default obarray.
+
+\(fn (VAR [RESULT]) BODY...)"
(declare (indent 1) (debug ((symbolp &optional form) cl-declarations body)))
`(cl-do-symbols (,(car spec) nil ,(cadr spec)) ,@body))
"Bind SYMBOLS to VALUES dynamically in BODY.
The forms SYMBOLS and VALUES are evaluated, and must evaluate to lists.
Each symbol in the first list is bound to the corresponding value in the
-second list (or made unbound if VALUES is shorter than SYMBOLS); then the
+second list (or to nil if VALUES is shorter than SYMBOLS); then the
BODY forms are executed and their result is returned. This is much like
a `let' form, except that the list of symbols can be computed at run-time."
(declare (indent 2) (debug (form form body)))
- `(let ((cl--progv-save nil))
- (unwind-protect
- (progn (cl--progv-before ,symbols ,values) ,@body)
- (cl--progv-after))))
+ (let ((bodyfun (make-symbol "body"))
+ (binds (make-symbol "binds"))
+ (syms (make-symbol "syms"))
+ (vals (make-symbol "vals")))
+ `(progn
+ (let* ((,syms ,symbols)
+ (,vals ,values)
+ (,bodyfun (lambda () ,@body))
+ (,binds ()))
+ (while ,syms
+ (push (list (pop ,syms) (list 'quote (pop ,vals))) ,binds))
+ (eval (list 'let ,binds (list 'funcall (list 'quote ,bodyfun))))))))
(defvar cl--labels-convert-cache nil)
(setq cl--labels-convert-cache (cons f res))
res))))))
-;;; This should really have some way to shadow 'byte-compile properties, etc.
;;;###autoload
(defmacro cl-flet (bindings &rest body)
- "Make temporary function definitions.
+ "Make local function definitions.
Like `cl-labels' but the definitions are not recursive.
\(fn ((FUNC ARGLIST BODY...) ...) FORM...)"
(if (assq 'function newenv) newenv
(cons (cons 'function #'cl--labels-convert) newenv)))))))
+;;;###autoload
+(defmacro cl-flet* (bindings &rest body)
+ "Make local function definitions.
+Like `cl-flet' but the definitions can refer to previous ones.
+
+\(fn ((FUNC ARGLIST BODY...) ...) FORM...)"
+ (declare (indent 1) (debug cl-flet))
+ (cond
+ ((null bindings) (macroexp-progn body))
+ ((null (cdr bindings)) `(cl-flet ,bindings ,@body))
+ (t `(cl-flet (,(pop bindings)) (cl-flet* ,bindings ,@body)))))
+
;;;###autoload
(defmacro cl-labels (bindings &rest body)
"Make temporary function bindings.
-The bindings can be recursive. Assumes the use of `lexical-binding'.
+The bindings can be recursive and the scoping is lexical, but capturing them
+in closures will only work if `lexical-binding' is in use.
\(fn ((FUNC ARGLIST BODY...) ...) FORM...)"
(declare (indent 1) (debug cl-flet))
cl--old-macroexpand
(symbol-function 'macroexpand)))
-(defun cl--sm-macroexpand (cl-macro &optional cl-env)
+(defun cl--sm-macroexpand (exp &optional env)
"Special macro expander used inside `cl-symbol-macrolet'.
This function replaces `macroexpand' during macro expansion
of `cl-symbol-macrolet', and does the same thing as `macroexpand'
except that it additionally expands symbol macros."
- (let ((macroexpand-all-environment cl-env))
+ (let ((macroexpand-all-environment env))
(while
(progn
- (setq cl-macro (funcall cl--old-macroexpand cl-macro cl-env))
- (cond
- ((symbolp cl-macro)
- ;; Perform symbol-macro expansion.
- (when (cdr (assq (symbol-name cl-macro) cl-env))
- (setq cl-macro (cadr (assq (symbol-name cl-macro) cl-env)))))
- ((eq 'setq (car-safe cl-macro))
- ;; Convert setq to setf if required by symbol-macro expansion.
- (let* ((args (mapcar (lambda (f) (cl--sm-macroexpand f cl-env))
- (cdr cl-macro)))
- (p args))
- (while (and p (symbolp (car p))) (setq p (cddr p)))
- (if p (setq cl-macro (cons 'setf args))
- (setq cl-macro (cons 'setq args))
- ;; Don't loop further.
- nil))))))
- cl-macro))
+ (setq exp (funcall cl--old-macroexpand exp env))
+ (pcase exp
+ ((pred symbolp)
+ ;; Perform symbol-macro expansion.
+ (when (cdr (assq (symbol-name exp) env))
+ (setq exp (cadr (assq (symbol-name exp) env)))))
+ (`(setq . ,_)
+ ;; Convert setq to setf if required by symbol-macro expansion.
+ (let* ((args (mapcar (lambda (f) (cl--sm-macroexpand f env))
+ (cdr exp)))
+ (p args))
+ (while (and p (symbolp (car p))) (setq p (cddr p)))
+ (if p (setq exp (cons 'setf args))
+ (setq exp (cons 'setq args))
+ ;; Don't loop further.
+ nil)))
+ (`(,(or `let `let*) . ,(or `(,bindings . ,body) dontcare))
+ ;; CL's symbol-macrolet treats re-bindings as candidates for
+ ;; expansion (turning the let into a letf if needed), contrary to
+ ;; Common-Lisp where such re-bindings hide the symbol-macro.
+ (let ((letf nil) (found nil) (nbs ()))
+ (dolist (binding bindings)
+ (let* ((var (if (symbolp binding) binding (car binding)))
+ (sm (assq (symbol-name var) env)))
+ (push (if (not (cdr sm))
+ binding
+ (let ((nexp (cadr sm)))
+ (setq found t)
+ (unless (symbolp nexp) (setq letf t))
+ (cons nexp (cdr-safe binding))))
+ nbs)))
+ (when found
+ (setq exp `(,(if letf
+ (if (eq (car exp) 'let) 'cl-letf 'cl-letf*)
+ (car exp))
+ ,(nreverse nbs)
+ ,@body)))))
+ ;; FIXME: The behavior of CL made sense in a dynamically scoped
+ ;; language, but for lexical scoping, Common-Lisp's behavior might
+ ;; make more sense (and indeed, CL behaves like Common-Lisp w.r.t
+ ;; lexical-let), so maybe we should adjust the behavior based on
+ ;; the use of lexical-binding.
+ ;; (`(,(or `let `let*) . ,(or `(,bindings . ,body) dontcare))
+ ;; (let ((nbs ()) (found nil))
+ ;; (dolist (binding bindings)
+ ;; (let* ((var (if (symbolp binding) binding (car binding)))
+ ;; (name (symbol-name var))
+ ;; (val (and found (consp binding) (eq 'let* (car exp))
+ ;; (list (macroexpand-all (cadr binding)
+ ;; env)))))
+ ;; (push (if (assq name env)
+ ;; ;; This binding should hide its symbol-macro,
+ ;; ;; but given the way macroexpand-all works, we
+ ;; ;; can't prevent application of `env' to the
+ ;; ;; sub-expressions, so we need to α-rename this
+ ;; ;; variable instead.
+ ;; (let ((nvar (make-symbol
+ ;; (copy-sequence name))))
+ ;; (setq found t)
+ ;; (push (list name nvar) env)
+ ;; (cons nvar (or val (cdr-safe binding))))
+ ;; (if val (cons var val) binding))
+ ;; nbs)))
+ ;; (when found
+ ;; (setq exp `(,(car exp)
+ ;; ,(nreverse nbs)
+ ;; ,@(macroexp-unprogn
+ ;; (macroexpand-all (macroexp-progn body)
+ ;; env)))))
+ ;; nil))
+ )))
+ exp))
;;;###autoload
(defmacro cl-symbol-macrolet (bindings &rest body)
(declare (indent 1) (debug ((&rest (symbol sexp)) cl-declarations body)))
(cond
((cdr bindings)
- `(cl-symbol-macrolet (,(car bindings))
+ `(cl-symbol-macrolet (,(car bindings))
(cl-symbol-macrolet ,(cdr bindings) ,@body)))
((null bindings) (macroexp-progn body))
(t
(fset 'macroexpand #'cl--sm-macroexpand)
;; FIXME: For N bindings, this will traverse `body' N times!
(macroexpand-all (cons 'progn body)
- (cons (list (symbol-name (caar bindings))
- (cl-cadar bindings))
+ (cons (list (symbol-name (caar bindings))
+ (cl-cadar bindings))
macroexpand-all-environment)))
(fset 'macroexpand previous-macroexpand))))))
;;;###autoload
(defmacro cl-locally (&rest body)
+ "Equivalent to `progn'."
(declare (debug t))
(cons 'progn body))
;;;###autoload
(defmacro cl-the (_type form)
+ "At present this ignores _TYPE and is simply equivalent to FORM."
(declare (indent 1) (debug (cl-type-spec form)))
form)
-(defvar cl-proclaim-history t) ; for future compilers
-(defvar cl-declare-stack t) ; for future compilers
+(defvar cl--proclaim-history t) ; for future compilers
+(defvar cl--declare-stack t) ; for future compilers
-(defun cl-do-proclaim (spec hist)
- (and hist (listp cl-proclaim-history) (push spec cl-proclaim-history))
+(defun cl--do-proclaim (spec hist)
+ (and hist (listp cl--proclaim-history) (push spec cl--proclaim-history))
(cond ((eq (car-safe spec) 'special)
(if (boundp 'byte-compile-bound-variables)
(setq byte-compile-bound-variables
'((0 nil) (1 t) (2 t) (3 t))))
(safety (assq (nth 1 (assq 'safety (cdr spec)))
'((0 t) (1 t) (2 t) (3 nil)))))
- (if speed (setq cl-optimize-speed (car speed)
+ (if speed (setq cl--optimize-speed (car speed)
byte-optimize (nth 1 speed)))
- (if safety (setq cl-optimize-safety (car safety)
+ (if safety (setq cl--optimize-safety (car safety)
byte-compile-delete-errors (nth 1 safety)))))
((and (eq (car-safe spec) 'warn) (boundp 'byte-compile-warnings))
nil)
;;; Process any proclamations made before cl-macs was loaded.
-(defvar cl-proclaims-deferred)
-(let ((p (reverse cl-proclaims-deferred)))
- (while p (cl-do-proclaim (pop p) t))
- (setq cl-proclaims-deferred nil))
+(defvar cl--proclaims-deferred)
+(let ((p (reverse cl--proclaims-deferred)))
+ (while p (cl--do-proclaim (pop p) t))
+ (setq cl--proclaims-deferred nil))
;;;###autoload
(defmacro cl-declare (&rest specs)
See Info node `(cl)Declarations' for details."
(if (cl--compiling-file)
(while specs
- (if (listp cl-declare-stack) (push (car specs) cl-declare-stack))
- (cl-do-proclaim (pop specs) nil)))
+ (if (listp cl--declare-stack) (push (car specs) cl--declare-stack))
+ (cl--do-proclaim (pop specs) nil)))
nil)
-
-
-;;; Generalized variables.
-
-;;; Some standard place types from Common Lisp.
-(gv-define-setter cl-get (store x y &optional d) `(put ,x ,y ,store))
-(gv-define-setter cl-subseq (new seq start &optional end)
- `(progn (cl-replace ,seq ,new :start1 ,start :end1 ,end) ,new))
-
-;;; Various car/cdr aliases. Note that `cadr' is handled specially.
-(gv-define-setter cl-fourth (store x) `(setcar (cl-cdddr ,x) ,store))
-(gv-define-setter cl-fifth (store x) `(setcar (nthcdr 4 ,x) ,store))
-(gv-define-setter cl-sixth (store x) `(setcar (nthcdr 5 ,x) ,store))
-(gv-define-setter cl-seventh (store x) `(setcar (nthcdr 6 ,x) ,store))
-(gv-define-setter cl-eighth (store x) `(setcar (nthcdr 7 ,x) ,store))
-(gv-define-setter cl-ninth (store x) `(setcar (nthcdr 8 ,x) ,store))
-(gv-define-setter cl-tenth (store x) `(setcar (nthcdr 9 ,x) ,store))
-
-;;; Some more Emacs-related place types.
-(gv-define-simple-setter buffer-file-name set-visited-file-name t)
-(gv-define-setter buffer-modified-p (flag &optional buf)
- `(with-current-buffer ,buf
- (set-buffer-modified-p ,flag)))
-(gv-define-simple-setter buffer-name rename-buffer t)
-(gv-define-setter buffer-string (store)
- `(progn (erase-buffer) (insert ,store)))
-(gv-define-simple-setter buffer-substring cl--set-buffer-substring)
-(gv-define-simple-setter current-buffer set-buffer)
-(gv-define-simple-setter current-case-table set-case-table)
-(gv-define-simple-setter current-column move-to-column t)
-(gv-define-simple-setter current-global-map use-global-map t)
-(gv-define-setter current-input-mode (store)
- `(progn (apply #'set-input-mode ,store) ,store))
-(gv-define-simple-setter current-local-map use-local-map t)
-(gv-define-simple-setter current-window-configuration set-window-configuration t)
-(gv-define-simple-setter default-file-modes set-default-file-modes t)
-(gv-define-simple-setter documentation-property put)
-(gv-define-setter face-background (x f &optional s) `(set-face-background ,f ,x ,s))
-(gv-define-setter face-background-pixmap (x f &optional s)
- `(set-face-background-pixmap ,f ,x ,s))
-(gv-define-setter face-font (x f &optional s) `(set-face-font ,f ,x ,s))
-(gv-define-setter face-foreground (x f &optional s) `(set-face-foreground ,f ,x ,s))
-(gv-define-setter face-underline-p (x f &optional s)
- `(set-face-underline-p ,f ,x ,s))
-(gv-define-simple-setter file-modes set-file-modes t)
-(gv-define-simple-setter frame-height set-screen-height t)
-(gv-define-simple-setter frame-parameters modify-frame-parameters t)
-(gv-define-simple-setter frame-visible-p cl--set-frame-visible-p)
-(gv-define-simple-setter frame-width set-screen-width t)
-(gv-define-simple-setter getenv setenv t)
-(gv-define-simple-setter get-register set-register)
-(gv-define-simple-setter global-key-binding global-set-key)
-(gv-define-simple-setter local-key-binding local-set-key)
-(gv-define-simple-setter mark set-mark t)
-(gv-define-simple-setter mark-marker set-mark t)
-(gv-define-simple-setter marker-position set-marker t)
-(gv-define-setter mouse-position (store scr)
- `(set-mouse-position ,scr (car ,store) (cadr ,store)
- (cddr ,store)))
-(gv-define-simple-setter point goto-char)
-(gv-define-simple-setter point-marker goto-char t)
-(gv-define-setter point-max (store)
- `(progn (narrow-to-region (point-min) ,store) ,store))
-(gv-define-setter point-min (store)
- `(progn (narrow-to-region ,store (point-max)) ,store))
-(gv-define-setter read-mouse-position (store scr)
- `(set-mouse-position ,scr (car ,store) (cdr ,store)))
-(gv-define-simple-setter screen-height set-screen-height t)
-(gv-define-simple-setter screen-width set-screen-width t)
-(gv-define-simple-setter selected-window select-window)
-(gv-define-simple-setter selected-screen select-screen)
-(gv-define-simple-setter selected-frame select-frame)
-(gv-define-simple-setter standard-case-table set-standard-case-table)
-(gv-define-simple-setter syntax-table set-syntax-table)
-(gv-define-simple-setter visited-file-modtime set-visited-file-modtime t)
-(gv-define-setter window-height (store)
- `(progn (enlarge-window (- ,store (window-height))) ,store))
-(gv-define-setter window-width (store)
- `(progn (enlarge-window (- ,store (window-width)) t) ,store))
-(gv-define-simple-setter x-get-secondary-selection x-own-secondary-selection t)
-(gv-define-simple-setter x-get-selection x-own-selection t)
-
-;;; More complex setf-methods.
-
-;; This is a hack that allows (setf (eq a 7) B) to mean either
-;; (setq a 7) or (setq a nil) depending on whether B is nil or not.
-;; This is useful when you have control over the PLACE but not over
-;; the VALUE, as is the case in define-minor-mode's :variable.
-;; It turned out that :variable needed more flexibility anyway, so
-;; this doesn't seem too useful now.
-(gv-define-expander eq
- (lambda (do place val)
- (gv-letplace (getter setter) place
- (macroexp-let2 nil val val
- (funcall do `(eq ,getter ,val)
- (lambda (v)
- `(cond
- (,v ,(funcall setter val))
- ((eq ,getter ,val) ,(funcall setter `(not ,val))))))))))
-
-(gv-define-expander nthcdr
- (lambda (do n place)
- (macroexp-let2 nil idx n
- (gv-letplace (getter setter) place
- (funcall do `(nthcdr ,idx ,getter)
- (lambda (v) `(if (<= ,idx 0) ,(funcall setter v)
- (setcdr (nthcdr (1- ,idx) ,getter) ,v))))))))
-
-(gv-define-expander cl-getf
- (lambda (do place tag &optional def)
- (gv-letplace (getter setter) place
- (macroexp-let2 nil k tag
- (macroexp-let2 nil d def
- (funcall do `(cl-getf ,getter ,k ,d)
- (lambda (v) (funcall setter `(cl--set-getf ,getter ,k ,v)))))))))
-
-(gv-define-expander substring
- (lambda (do place from &optional to)
- (gv-letplace (getter setter) place
- (macroexp-let2 nil start from
- (macroexp-let2 nil end to
- (funcall do `(substring ,getter ,start ,end)
- (lambda (v)
- (funcall setter `(cl--set-substring
- ,getter ,start ,end ,v)))))))))
-
;;; The standard modify macros.
;; `setf' is now part of core Elisp, defined in gv.el.
(or p (error "Odd number of arguments to cl-psetf"))
(pop p))
(if simple
- `(progn (setf ,@args) nil)
+ `(progn (setq ,@args) nil)
(setq args (reverse args))
(let ((expr `(setf ,(cadr args) ,(car args))))
(while (setq args (cddr args))
(macroexp-let* `((,temp ,getter))
`(progn ,(funcall setter form) nil))))))
+;; FIXME: `letf' is unsatisfactory because it does not really "restore" the
+;; previous state. If the getter/setter loses information, that info is
+;; not recovered.
+
+(defun cl--letf (bindings simplebinds binds body)
+ ;; It's not quite clear what the semantics of cl-letf should be.
+ ;; E.g. in (cl-letf ((PLACE1 VAL1) (PLACE2 VAL2)) BODY), while it's clear
+ ;; that the actual assignments ("bindings") should only happen after
+ ;; evaluating VAL1 and VAL2, it's not clear when the sub-expressions of
+ ;; PLACE1 and PLACE2 should be evaluated. Should we have
+ ;; PLACE1; VAL1; PLACE2; VAL2; bind1; bind2
+ ;; or
+ ;; VAL1; VAL2; PLACE1; PLACE2; bind1; bind2
+ ;; or
+ ;; VAL1; VAL2; PLACE1; bind1; PLACE2; bind2
+ ;; Common-Lisp's `psetf' does the first, so we'll do the same.
+ (if (null bindings)
+ (if (and (null binds) (null simplebinds)) (macroexp-progn body)
+ `(let* (,@(mapcar (lambda (x)
+ (pcase-let ((`(,vold ,getter ,_setter ,_vnew) x))
+ (list vold getter)))
+ binds)
+ ,@simplebinds)
+ (unwind-protect
+ ,(macroexp-progn
+ (append
+ (delq nil
+ (mapcar (lambda (x)
+ (pcase x
+ ;; If there's no vnew, do nothing.
+ (`(,_vold ,_getter ,setter ,vnew)
+ (funcall setter vnew))))
+ binds))
+ body))
+ ,@(mapcar (lambda (x)
+ (pcase-let ((`(,vold ,_getter ,setter ,_vnew) x))
+ (funcall setter vold)))
+ binds))))
+ (let ((binding (car bindings)))
+ (gv-letplace (getter setter) (car binding)
+ (macroexp-let2 nil vnew (cadr binding)
+ (if (symbolp (car binding))
+ ;; Special-case for simple variables.
+ (cl--letf (cdr bindings)
+ (cons `(,getter ,(if (cdr binding) vnew getter))
+ simplebinds)
+ binds body)
+ (cl--letf (cdr bindings) simplebinds
+ (cons `(,(make-symbol "old") ,getter ,setter
+ ,@(if (cdr binding) (list vnew)))
+ binds)
+ body)))))))
+
+;;;###autoload
+(defmacro cl-letf (bindings &rest body)
+ "Temporarily bind to PLACEs.
+This is the analogue of `let', but with generalized variables (in the
+sense of `setf') for the PLACEs. Each PLACE is set to the corresponding
+VALUE, then the BODY forms are executed. On exit, either normally or
+because of a `throw' or error, the PLACEs are set back to their original
+values. Note that this macro is *not* available in Common Lisp.
+As a special case, if `(PLACE)' is used instead of `(PLACE VALUE)',
+the PLACE is not modified before executing BODY.
+
+\(fn ((PLACE VALUE) ...) BODY...)"
+ (declare (indent 1) (debug ((&rest (gate gv-place &optional form)) body)))
+ (if (and (not (cdr bindings)) (cdar bindings) (symbolp (caar bindings)))
+ `(let ,bindings ,@body)
+ (cl--letf bindings () () body)))
+
+;;;###autoload
+(defmacro cl-letf* (bindings &rest body)
+ "Temporarily bind to PLACEs.
+Like `cl-letf' but where the bindings are performed one at a time,
+rather than all at the end (i.e. like `let*' rather than like `let')."
+ (declare (indent 1) (debug cl-letf))
+ (dolist (binding (reverse bindings))
+ (setq body (list `(cl-letf (,binding) ,@body))))
+ (macroexp-progn body))
+
;;;###autoload
(defmacro cl-callf (func place &rest args)
"Set PLACE to (FUNC PLACE ARGS...).
You can use the accessors to set the corresponding slots, via `setf'.
NAME may instead take the form (NAME OPTIONS...), where each
-OPTION is either a single keyword or (KEYWORD VALUE).
-See Info node `(cl)Structures' for a list of valid keywords.
+OPTION is either a single keyword or (KEYWORD VALUE) where
+KEYWORD can be one of :conc-name, :constructor, :copier, :predicate,
+:type, :named, :initial-offset, :print-function, or :include.
Each SLOT may instead take the form (SLOT SLOT-OPTS...), where
SLOT-OPTS are keyword-value pairs for that slot. Currently, only
value, that slot cannot be set via `setf'.
\(fn NAME SLOTS...)"
- (declare (doc-string 2)
+ (declare (doc-string 2) (indent 1)
(debug
(&define ;Makes top-level form not be wrapped.
[&or symbolp
(copier (intern (format "copy-%s" name)))
(predicate (intern (format "%s-p" name)))
(print-func nil) (print-auto nil)
- (safety (if (cl--compiling-file) cl-optimize-safety 3))
+ (safety (if (cl--compiling-file) cl--optimize-safety 3))
(include nil)
(tag (intern (format "cl-struct-%s" name)))
(tag-symbol (intern (format "cl-struct-%s-tags" name)))
(if (= pos 0) '(car cl-x)
`(nth ,pos cl-x)))) forms)
(push (cons accessor t) side-eff)
- ;; Don't bother defining a setf-expander, since gv-get can use
- ;; the compiler macro to get the same result.
- ;;(push `(gv-define-setter ,accessor (cl-val cl-x)
- ;; ,(if (cadr (memq :read-only (cddr desc)))
- ;; `(progn (ignore cl-x cl-val)
- ;; (error "%s is a read-only slot"
- ;; ',accessor))
- ;; ;; If cl is loaded only for compilation,
- ;; ;; the call to cl--struct-setf-expander would
- ;; ;; cause a warning because it may not be
- ;; ;; defined at run time. Suppress that warning.
- ;; `(progn
- ;; (declare-function
- ;; cl--struct-setf-expander "cl-macs"
- ;; (x name accessor pred-form pos))
- ;; (cl--struct-setf-expander
- ;; cl-val cl-x ',name ',accessor
- ;; ,(and pred-check `',pred-check)
- ;; ,pos))))
- ;; forms)
+ (if (cadr (memq :read-only (cddr desc)))
+ (push `(gv-define-expander ,accessor
+ (lambda (_cl-do _cl-x)
+ (error "%s is a read-only slot" ',accessor)))
+ forms)
+ ;; For normal slots, we don't need to define a setf-expander,
+ ;; since gv-get can use the compiler macro to get the
+ ;; same result.
+ ;; (push `(gv-define-setter ,accessor (cl-val cl-x)
+ ;; ;; If cl is loaded only for compilation,
+ ;; ;; the call to cl--struct-setf-expander would
+ ;; ;; cause a warning because it may not be
+ ;; ;; defined at run time. Suppress that warning.
+ ;; (progn
+ ;; (declare-function
+ ;; cl--struct-setf-expander "cl-macs"
+ ;; (x name accessor pred-form pos))
+ ;; (cl--struct-setf-expander
+ ;; cl-val cl-x ',name ',accessor
+ ;; ,(and pred-check `',pred-check)
+ ;; ,pos)))
+ ;; forms)
+ )
(if print-auto
(nconc print-func
(list `(princ ,(format " %s" slot) cl-s)
(if (consp (cadr type)) `(> ,val ,(cl-caadr type))
`(>= ,val ,(cadr type))))
,(if (memq (cl-caddr type) '(* nil)) t
- (if (consp (cl-caddr type)) `(< ,val ,(cl-caaddr type))
+ (if (consp (cl-caddr type))
+ `(< ,val ,(cl-caaddr type))
`(<= ,val ,(cl-caddr type)))))))
((memq (car type) '(and or not))
(cons (car type)
STRING is an optional description of the desired type."
(declare (debug (place cl-type-spec &optional stringp)))
(and (or (not (cl--compiling-file))
- (< cl-optimize-speed 3) (= cl-optimize-safety 3))
+ (< cl--optimize-speed 3) (= cl--optimize-safety 3))
(let* ((temp (if (cl--simple-expr-p form 3)
form (make-symbol "--cl-var--")))
(body `(or ,(cl--make-type-test temp type)
;;;###autoload
(defmacro cl-assert (form &optional show-args string &rest args)
+ ;; FIXME: This is actually not compatible with Common-Lisp's `assert'.
"Verify that FORM returns non-nil; signal an error if not.
Second arg SHOW-ARGS means to include arguments of FORM in message.
Other args STRING and ARGS... are arguments to be passed to `error'.
omitted, a default message listing FORM itself is used."
(declare (debug (form &rest form)))
(and (or (not (cl--compiling-file))
- (< cl-optimize-speed 3) (= cl-optimize-safety 3))
+ (< cl--optimize-speed 3) (= cl--optimize-safety 3))
(let ((sargs (and show-args
(delq nil (mapcar (lambda (x)
(unless (macroexp-const-p x)
;;;###autoload
(defun cl-compiler-macroexpand (form)
+ "Like `macroexpand', but for compiler macros.
+Expands FORM repeatedly until no further expansion is possible.
+Returns FORM unchanged if it has no compiler macro, or if it has a
+macro that returns its `&whole' argument."
(while
(let ((func (car-safe form)) (handler nil))
(while (and (symbolp func)
(not (setq handler (get func 'compiler-macro)))
(fboundp func)
- (or (not (eq (car-safe (symbol-function func)) 'autoload))
- (load (nth 1 (symbol-function func)))))
+ (or (not (autoloadp (symbol-function func)))
+ (autoload-do-load (symbol-function func) func)))
(setq func (symbol-function func)))
(and handler
(not (eq form (setq form (apply handler form (cdr form))))))))
;; Compile-time optimizations for some functions defined in this package.
-;; Note that cl.el arranges to force cl-macs to be loaded at compile-time,
-;; mainly to make sure these macros will be present.
(defun cl--compiler-macro-member (form a list &rest keys)
(let ((test (and (= (length keys) 2) (eq (car keys) :test)
`(if (cl-member ,a ,list ,@keys) ,list (cons ,a ,list))
form))
-;;;###autoload
-(defun cl--compiler-macro-list* (_form arg &rest others)
- (let* ((args (reverse (cons arg others)))
- (form (car args)))
- (while (setq args (cdr args))
- (setq form `(cons ,(car args) ,form)))
- form))
-
(defun cl--compiler-macro-get (_form sym prop &optional def)
(if def
`(cl-getf (symbol-plist ,sym) ,prop ,def)
(cl--make-type-test temp (cl--const-expr-val type)))
form))
-;;;###autoload
-(defun cl--compiler-macro-cXXr (form x)
- (let* ((head (car form))
- (n (symbol-name (car form)))
- (i (- (length n) 2)))
- (if (not (string-match "c[ad]+r\\'" n))
- (if (and (fboundp head) (symbolp (symbol-function head)))
- (cl--compiler-macro-cXXr (cons (symbol-function head) (cdr form))
- x)
- (error "Compiler macro for cXXr applied to non-cXXr form"))
- (while (> i (match-beginning 0))
- (setq x (list (if (eq (aref n i) ?a) 'car 'cdr) x))
- (setq i (1- i)))
- x)))
-
(dolist (y '(cl-first cl-second cl-third cl-fourth
cl-fifth cl-sixth cl-seventh
cl-eighth cl-ninth cl-tenth
;;; Things that are side-effect-free.
(mapc (lambda (x) (put x 'side-effect-free t))
- '(cl-oddp cl-evenp cl-signum last butlast cl-ldiff cl-pairlis cl-gcd cl-lcm
- cl-isqrt cl-floor cl-ceiling cl-truncate cl-round cl-mod cl-rem cl-subseq
- cl-list-length cl-get cl-getf))
+ '(cl-oddp cl-evenp cl-signum last butlast cl-ldiff cl-pairlis cl-gcd
+ cl-lcm cl-isqrt cl-floor cl-ceiling cl-truncate cl-round cl-mod cl-rem
+ cl-subseq cl-list-length cl-get cl-getf))
;;; Things that are side-effect-and-error-free.
(mapc (lambda (x) (put x 'side-effect-free 'error-free))
- '(eql cl-floatp-safe cl-list* cl-subst cl-acons cl-equalp cl-random-state-p
- copy-tree cl-sublis))
+ '(eql cl-floatp-safe cl-list* cl-subst cl-acons cl-equalp
+ cl-random-state-p copy-tree cl-sublis))
(run-hooks 'cl-macs-load-hook)
;; Local variables:
;; byte-compile-dynamic: t
-;; byte-compile-warnings: (not cl-functions)
;; generated-autoload-file: "cl-loaddefs.el"
;; End: