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Improve the implementation, documentation of #'labels, #'flet. lisp/ChangeLog addition: 2011-09-07 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el: * bytecomp.el (for-effect): Move this earlier in the file, it's referenced in byte-compile-initial-macro-environment. * bytecomp.el (byte-compile-initial-macro-environment): In the byte-compile-macro-environment definition for #'labels, put off the compiling the lambda bodies until the point where the rest of the form is being compiled, allowing the lambda bodies to access appropriate values for byte-compile-bound-variables, and reducing excessive warning about free variables. Add a byte-compile-macro-environment definition for #'flet. This modifies byte-compile-function-environment appropriately, and warns about bindings of functions that have macro definitions in the current environment, about functions that have byte codes, and about functions that have byte-compile methods (which may not do what the user wants at runtime). * bytecomp.el (byte-compile-funcall): If FUNCTION is constant, call #'byte-compile-callargs-warn if that's appropriate, giving warnings about problems with calling functions bound with #'labels. * cl-macs.el: * cl-macs.el (flet): Mention the main difference from Common Lisp, that the bindings are dynamic, not lexical. Counsel the use of #'labels, not #'flet, for this and other reasons. Explain the limited single use case for #'flet. Cross-reference to bytecomp.el in a comment. * cl-macs.el (labels): Go into detail on which functions may be called from where. Explain how to access the function definition of a label within FORM. Add a comment cross-referencing to bytecomp.el. man/ChangeLog addition: 2011-09-07 Aidan Kehoe <kehoea@parhasard.net> * cl.texi (Function Bindings): Move #'labels first, describe it in more detail, explaining that it is to be preferred over #'flet, and explaining why. Explain that dynamic bindings with #'flet will also not work when functions are accessed through their bytecodes.
author Aidan Kehoe <kehoea@parhasard.net>
date Wed, 07 Sep 2011 16:26:45 +0100
parents 308d34e9f07d
children
line wrap: on
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/* Interface from Emacs to terminfo.
   Copyright (C) 1985, 1986, 1993 Free Software Foundation, Inc.

This file is part of XEmacs.

XEmacs 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 3 of the License, or (at your
option) any later version.

XEmacs 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 XEmacs.  If not, see <http://www.gnu.org/licenses/>. */

/* Synched up with: FSF 19.30. */

#include <config.h>

#include <string.h>

/* Every little bit of this God-damned file has caused all manner
   of headaches due to inconsistent and incorrect header files
   on one system or other, and we don't currently need anything here,
   so just comment the whole damn lot out!!! */

#ifndef HAVE_TERMIOS

#ifdef AIX
#include <termio.h>
#endif /* AIX */

/* Interface to curses/terminfo library.
   Turns out that all of the terminfo-level routines look
   like their termcap counterparts except for tparm, which replaces
   tgoto.  Not only is the calling sequence different, but the string
   format is different too.
*/

#include CURSES_H_FILE
/* Sun, in their infinite lameness, supplies (possibly) broken headers
   even under Solaris.  GCC feels it necessary to correct things by
   supplying its own headers.  Unfortunately, if you build GCC under
   one version of Solaris and then upgrade your Solaris, you may get
   screwed because Sun in their continuing lameness changes curses.h
   in such a way that the "fixed" GCC headers are now broken. (GCC
   is equally lame in that it supplies "fixed" headers for curses.h
   but not term.h.) However, it seems to work to just not include
   term.h under Solaris, so we try that.  KLUDGE! */
#if !(defined (__GNUC__) && defined (SOLARIS2))
#include TERM_H_FILE
#endif

extern void *xmalloc (int size);

#if 0 /* If this isn't declared somewhere, too bad */
extern char * tparm (const char *string, int arg1, int arg2, int arg3,
                     int arg4, int arg5, int arg6, int arg7, int arg8,
                     int arg9);
#endif
/* XEmacs: renamed this function because just tparam() conflicts with
   ncurses (We don't use this function anyway!) */
char *
emacs_tparam (const char *string, char *outstring, int UNUSED (len), int arg1,
	      int arg2, int arg3, int arg4, int arg5, int arg6, int arg7,
	      int arg8, int arg9)
{
  char *temp;

  temp = (char *) tparm (string, arg1, arg2, arg3, arg4, arg5, arg6, arg7,
			 arg8, arg9);
  if (outstring == 0)
    outstring = (char *) xmalloc (strlen (temp) + 1);
  strcpy (outstring, temp);
  return outstring;
}

#endif /* not HAVE_TERMIOS */