;;; Commentary:
;; Note to developers:
-;;
+;;
;; If old (v18) compiler is used, top-level macros are expanded at
;; *load-time*, not compile-time. So, you cannot use macros defined
-;; in this file using `defmacro-maybe'. Especially, you cannot use
-;; `eval-when-compile' and `eval-and-compile' in this file.
+;; in this file using `defmacro-maybe'. In addition, due to this
+;; limitation, `eval-when-compile' and `eval-and-compile' provided by
+;; this file do not do compile-time evaluation at all.
;;; Code:
Therefore, write `(setq foo (delete element foo))'
to be sure of changing the value of `foo'.
\[poe-18.el; EMACS 19 emulating function]"
- (if (equal elt (car list))
- (cdr list)
- (let ((rest list)
- (rrest (cdr list)))
- (while (and rrest (not (equal elt (car rrest))))
- (setq rest rrest
- rrest (cdr rrest)))
- (setcdr rest (cdr rrest))
- list)))
+ (if list
+ (if (equal elt (car list))
+ (cdr list)
+ (let ((rest list)
+ (rrest (cdr list)))
+ (while (and rrest (not (equal elt (car rrest))))
+ (setq rest rrest
+ rrest (cdr rrest)))
+ (setcdr rest (cdr rrest))
+ list))))
(defun member (elt list)
"Return non-nil if ELT is an element of LIST. Comparison done with EQUAL.
(autoload 'setenv "env"
"Set the value of the environment variable named VARIABLE to VALUE.
VARIABLE should be a string. VALUE is optional; if not provided or is
-`nil', the environment variable VARIABLE will be removed.
+`nil', the environment variable VARIABLE will be removed.
This function works by modifying `process-environment'."
t)
;;; @ Compilation Features
;;;
-(put 'eval-when-compile 'lisp-indent-hook 0)
-(defmacro-maybe eval-when-compile (&rest body)
- "Like progn, but evaluates the body at compile-time.
-
-This emulating macro does not work if used at top-level.
-Top-level macros are expanded at load-time.
-\[poe-18.el; EMACS 19 emulating macro]"
- (list 'quote (eval (cons 'progn body))))
+;;; emulate all functions and macros of emacs-20.3/lisp/byte-run.el.
+;;; (note: jwz's original compiler and XEmacs compiler have some more
+;;; macros; they are "nuked" by rms in FSF version.)
-(put 'eval-and-compile 'lisp-indent-hook 0)
-(defmacro-maybe eval-and-compile (&rest body)
- "Like progn, but evaluates the body at compile-time as well as at load-time.
+(put 'inline 'lisp-indent-hook 0)
+(defmacro inline (&rest body)
+ "Eval BODY forms sequentially and return value of last one.
-This emulating macro does not work if used at top-level.
-Top-level macros are expanded at load-time.
+This emulating macro does not support function inlining because old \(v18\)
+compiler does not support inlining feature.
\[poe-18.el; EMACS 19 emulating macro]"
- ;; `form' is a parameter of `byte-compile-form'. kludge! kludge! kludge!
- ;; this kludge prevents from evaluating `body' twice when this macro is
- ;; expanded at load-time.
- (if (and (boundp 'form)
- (eq (car-safe form) 'eval-and-compile))
- (eval (cons 'progn body)))
- (cons 'progn body))
+ (` (progn (,@ body))))
(put 'defsubst 'lisp-indent-hook 'defun)
(put 'defsubst 'edebug-form-spec 'defun)
(defmacro-maybe defsubst (name arglist &rest body)
"Define an inline function. The syntax is just like that of `defun'.
-This emulating macro does not support function inlining because old (v18)
+This emulating macro does not support function inlining because old \(v18\)
compiler does not support inlining feature.
\[poe-18.el; EMACS 19 emulating macro]"
(cons 'defun (cons name (cons arglist body))))
The warning will say that NEW should be used instead.
If NEW is a string, that is the `use instead' message.
-This emulating function does nothing because old (v18) compiler does not
+This emulating function does nothing because old \(v18\) compiler does not
support this feature.
\[poe-18.el; EMACS 19 emulating function]"
(interactive "aMake function obsolete: \nxObsoletion replacement: ")
fn)
+(defun-maybe make-obsolete-variable (var new)
+ "Make the byte-compiler warn that VARIABLE is obsolete,
+and NEW should be used instead. If NEW is a string, then that is the
+`use instead' message.
+
+This emulating function does nothing because old \(v18\) compiler does not
+support this feature.
+\[poe-18.el; EMACS 19 emulating function]"
+ (interactive "vMake variable obsolete: \nxObsoletion replacement: ")
+ var)
+
+(put 'dont-compile 'lisp-indent-hook 0)
+(defmacro-maybe dont-compile (&rest body)
+ "Like `progn', but the body always runs interpreted \(not compiled\).
+If you think you need this, you're probably making a mistake somewhere.
+\[poe-18.el; EMACS 19 emulating macro]"
+ (list 'eval (list 'quote (if (cdr body) (cons 'progn body) (car body)))))
+
+(put 'eval-when-compile 'lisp-indent-hook 0)
+(defmacro-maybe eval-when-compile (&rest body)
+ "Like progn, but evaluates the body at compile-time.
+
+This emulating macro does not do compile-time evaluation at all because
+of the limitation of old \(v18\) compiler.
+\[poe-18.el; EMACS 19 emulating macro]"
+ (cons 'progn body))
+
+(put 'eval-and-compile 'lisp-indent-hook 0)
+(defmacro-maybe eval-and-compile (&rest body)
+ "Like progn, but evaluates the body at compile-time as well as at load-time.
+
+This emulating macro does not do compile-time evaluation at all because
+of the limitation of old \(v18\) compiler.
+\[poe-18.el; EMACS 19 emulating macro]"
+ (cons 'progn body))
+
;;; @ text property
;;;
(defun remove-text-properties (start end properties &optional object))
+(defun get-text-property (position prop &optional object))
+
+(defun add-text-properties (start end properties &optional object))
+
+(defun put-text-property (start end property value &optional object))
+
+(defun next-property-change (position &optional object limit))
+
+(defun text-properties-at (position &optional object))
;;; @ file
;;;
\[poe-18.el; EMACS 19 emulating function]"
(si:directory-files directory full match))
-
+(defun file-executable-p (filename)
+ "Return t if FILENAME can be executed by you.
+For a directory, this means you can access files in that directory.
+\[poe-18.el; EMACS 19 emulating function]"
+ (if (file-exists-p filename)
+ (let ((process (start-process "test" nil "test" "-x" filename)))
+ (while (eq 'run (process-status process)))
+ (zerop (process-exit-status process)))))
+
+
;;; @ Display Features
;;;
(set-marker (nth posto attr-value) to))
(setcdr (nthcdr posfrom attr-value)
(nthcdr posto attr-value)))))
-
+
(defalias 'make-overlay 'cons)
(defun overlay-put (overlay prop value)
projects / elisp / apel.git / blobdiff