byte-run.el 9.17 KB
Newer Older
Juanma Barranquero's avatar
Juanma Barranquero committed
1 2
;;; byte-run.el --- byte-compiler support for inlining

3
;; Copyright (C) 1992, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Juanma Barranquero's avatar
Juanma Barranquero committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

;; Author: Jamie Zawinski <jwz@lucid.com>
;;	Hallvard Furuseth <hbf@ulrik.uio.no>
;; Maintainer: FSF
;; Keywords: internal

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
Lute Kamstra's avatar
Lute Kamstra committed
24 25
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
Juanma Barranquero's avatar
Juanma Barranquero committed
26 27 28 29 30 31 32 33

;;; Commentary:

;; interface to selectively inlining functions.
;; This only happens when source-code optimization is turned on.

;;; Code:

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
;; We define macro-declaration-function here because it is needed to
;; handle declarations in macro definitions and this is the first file
;; loaded by loadup.el that uses declarations in macros.

(defun macro-declaration-function (macro decl)
  "Process a declaration found in a macro definition.
This is set as the value of the variable `macro-declaration-function'.
MACRO is the name of the macro being defined.
DECL is a list `(declare ...)' containing the declarations.
The return value of this function is not used."
  ;; We can't use `dolist' or `cadr' yet for bootstrapping reasons.
  (let (d)
    ;; Ignore the first element of `decl' (it's always `declare').
    (while (setq decl (cdr decl))
      (setq d (car decl))
      (cond ((and (consp d) (eq (car d) 'indent))
	     (put macro 'lisp-indent-function (car (cdr d))))
	    ((and (consp d) (eq (car d) 'debug))
	     (put macro 'edebug-form-spec (car (cdr d))))
	    (t
	     (message "Unknown declaration %s" d))))))

(setq macro-declaration-function 'macro-declaration-function)


Juanma Barranquero's avatar
Juanma Barranquero committed
59 60 61
;; Redefined in byte-optimize.el.
;; This is not documented--it's not clear that we should promote it.
(fset 'inline 'progn)
62
(put 'inline 'lisp-indent-function 0)
Juanma Barranquero's avatar
Juanma Barranquero committed
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93

;;; Interface to inline functions.

;; (defmacro proclaim-inline (&rest fns)
;;   "Cause the named functions to be open-coded when called from compiled code.
;; They will only be compiled open-coded when byte-compile-optimize is true."
;;   (cons 'eval-and-compile
;; 	(mapcar '(lambda (x)
;; 		   (or (memq (get x 'byte-optimizer)
;; 			     '(nil byte-compile-inline-expand))
;; 		       (error
;; 			"%s already has a byte-optimizer, can't make it inline"
;; 			x))
;; 		   (list 'put (list 'quote x)
;; 			 ''byte-optimizer ''byte-compile-inline-expand))
;; 		fns)))

;; (defmacro proclaim-notinline (&rest fns)
;;   "Cause the named functions to no longer be open-coded."
;;   (cons 'eval-and-compile
;; 	(mapcar '(lambda (x)
;; 		   (if (eq (get x 'byte-optimizer) 'byte-compile-inline-expand)
;; 		       (put x 'byte-optimizer nil))
;; 		   (list 'if (list 'eq (list 'get (list 'quote x) ''byte-optimizer)
;; 				   ''byte-compile-inline-expand)
;; 			 (list 'put x ''byte-optimizer nil)))
;; 		fns)))

;; This has a special byte-hunk-handler in bytecomp.el.
(defmacro defsubst (name arglist &rest body)
  "Define an inline function.  The syntax is just like that of `defun'."
94
  (declare (debug defun))
Juanma Barranquero's avatar
Juanma Barranquero committed
95 96 97
  (or (memq (get name 'byte-optimizer)
	    '(nil byte-compile-inline-expand))
      (error "`%s' is a primitive" name))
98 99 100 101
  `(prog1
       (defun ,name ,arglist ,@body)
     (eval-and-compile
       (put ',name 'byte-optimizer 'byte-compile-inline-expand))))
Juanma Barranquero's avatar
Juanma Barranquero committed
102

103 104 105 106
(defun make-obsolete (obsolete-name current-name &optional when)
  "Make the byte-compiler warn that OBSOLETE-NAME is obsolete.
The warning will say that CURRENT-NAME should be used instead.
If CURRENT-NAME is a string, that is the `use instead' message.
Juanma Barranquero's avatar
Juanma Barranquero committed
107 108 109
If provided, WHEN should be a string indicating when the function
was first made obsolete, for example a date or a release number."
  (interactive "aMake function obsolete: \nxObsoletion replacement: ")
110
  (let ((handler (get obsolete-name 'byte-compile)))
Juanma Barranquero's avatar
Juanma Barranquero committed
111
    (if (eq 'byte-compile-obsolete handler)
112 113 114 115
	(setq handler (nth 1 (get obsolete-name 'byte-obsolete-info)))
      (put obsolete-name 'byte-compile 'byte-compile-obsolete))
    (put obsolete-name 'byte-obsolete-info (list current-name handler when)))
  obsolete-name)
Juanma Barranquero's avatar
Juanma Barranquero committed
116

117
(defmacro define-obsolete-function-alias (obsolete-name current-name
118
						   &optional when docstring)
119
  "Set OBSOLETE-NAME's function definition to CURRENT-NAME and mark it obsolete.
120 121 122 123 124 125 126 127 128

\(define-obsolete-function-alias 'old-fun 'new-fun \"22.1\" \"old-fun's doc.\")

is equivalent to the following two lines of code:

\(defalias 'old-fun 'new-fun \"old-fun's doc.\")
\(make-obsolete 'old-fun 'new-fun \"22.1\")

See the docstrings of `defalias' and `make-obsolete' for more details."
129
  `(progn
130 131
     (defalias ,obsolete-name ,current-name ,docstring)
     (make-obsolete ,obsolete-name ,current-name ,when)))
132

133 134 135 136
(defun make-obsolete-variable (obsolete-name current-name &optional when)
  "Make the byte-compiler warn that OBSOLETE-NAME is obsolete.
The warning will say that CURRENT-NAME should be used instead.
If CURRENT-NAME is a string, that is the `use instead' message.
Juanma Barranquero's avatar
Juanma Barranquero committed
137 138 139 140 141 142 143 144
If provided, WHEN should be a string indicating when the variable
was first made obsolete, for example a date or a release number."
  (interactive
   (list
    (let ((str (completing-read "Make variable obsolete: " obarray 'boundp t)))
      (if (equal str "") (error ""))
      (intern str))
    (car (read-from-string (read-string "Obsoletion replacement: ")))))
145 146
  (put obsolete-name 'byte-obsolete-variable (cons current-name when))
  obsolete-name)
Juanma Barranquero's avatar
Juanma Barranquero committed
147

148
(defmacro define-obsolete-variable-alias (obsolete-name current-name
149
						 &optional when docstring)
150
  "Make OBSOLETE-NAME a variable alias for CURRENT-NAME and mark it obsolete.
151 152 153 154 155 156 157 158 159 160

\(define-obsolete-variable-alias 'old-var 'new-var \"22.1\" \"old-var's doc.\")

is equivalent to the following two lines of code:

\(defvaralias 'old-var 'new-var \"old-var's doc.\")
\(make-obsolete-variable 'old-var 'new-var \"22.1\")

See the docstrings of `defvaralias' and `make-obsolete-variable' or
Info node `(elisp)Variable Aliases' for more details."
161
  `(progn
162 163
     (defvaralias ,obsolete-name ,current-name ,docstring)
      (make-obsolete-variable ,obsolete-name ,current-name ,when)))
164

Juanma Barranquero's avatar
Juanma Barranquero committed
165 166 167
(defmacro 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."
168
  (declare (debug t) (indent 0))
Juanma Barranquero's avatar
Juanma Barranquero committed
169 170 171 172 173 174 175 176 177
  (list 'eval (list 'quote (if (cdr body) (cons 'progn body) (car body)))))


;;; interface to evaluating things at compile time and/or load time
;;; these macro must come after any uses of them in this file, as their
;;; definition in the file overrides the magic definitions on the
;;; byte-compile-macro-environment.

(defmacro eval-when-compile (&rest body)
178 179 180
  "Like `progn', but evaluates the body at compile time if you're compiling.
Thus, the result of the body appears to the compiler as a quoted constant.
In interpreted code, this is entirely equivalent to `progn'."
181
  (declare (debug t) (indent 0))
Juanma Barranquero's avatar
Juanma Barranquero committed
182 183 184 185 186 187
  ;; Not necessary because we have it in b-c-initial-macro-environment
  ;; (list 'quote (eval (cons 'progn body)))
  (cons 'progn body))

(defmacro eval-and-compile (&rest body)
  "Like `progn', but evaluates the body at compile time and at load time."
188
  (declare (debug t) (indent 0))
Juanma Barranquero's avatar
Juanma Barranquero committed
189 190 191
  ;; Remember, it's magic.
  (cons 'progn body))

192
(put 'with-no-warnings 'lisp-indent-function 0)
193
(defun with-no-warnings (&rest body)
Juanma Barranquero's avatar
Juanma Barranquero committed
194 195
  "Like `progn', but prevents compiler warnings in the body."
  ;; The implementation for the interpreter is basically trivial.
196
  (car (last body)))
Juanma Barranquero's avatar
Juanma Barranquero committed
197 198 199 200 201 202 203 204 205


;;; I nuked this because it's not a good idea for users to think of using it.
;;; These options are a matter of installation preference, and have nothing to
;;; with particular source files; it's a mistake to suggest to users
;;; they should associate these with particular source files.
;;; There is hardly any reason to change these parameters, anyway.
;;; --rms.

206
;; (put 'byte-compiler-options 'lisp-indent-function 0)
Juanma Barranquero's avatar
Juanma Barranquero committed
207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
;; (defmacro byte-compiler-options (&rest args)
;;   "Set some compilation-parameters for this file.  This will affect only the
;; file in which it appears; this does nothing when evaluated, and when loaded
;; from a .el file.
;;
;; Each argument to this macro must be a list of a key and a value.
;;
;;   Keys:		  Values:		Corresponding variable:
;;
;;   verbose	  t, nil		byte-compile-verbose
;;   optimize	  t, nil, source, byte	byte-compile-optimize
;;   warnings	  list of warnings	byte-compile-warnings
;; 		      Legal elements: (callargs redefine free-vars unresolved)
;;   file-format	  emacs18, emacs19	byte-compile-compatibility
;;
;; For example, this might appear at the top of a source file:
;;
;;     (byte-compiler-options
;;       (optimize t)
;;       (warnings (- free-vars))		; Don't warn about free variables
;;       (file-format emacs19))"
;;   nil)

Miles Bader's avatar
Miles Bader committed
230
;;; arch-tag: 76f8328a-1f66-4df2-9b6d-5c3666dc05e9
Juanma Barranquero's avatar
Juanma Barranquero committed
231
;;; byte-run.el ends here