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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
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/* Generic select data structures functions
   Copyright (C) 1999 Andy Piper

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: Not in FSF. */

#ifndef INCLUDED_select_h_
#define INCLUDED_select_h_

/* X Atoms */
extern Lisp_Object QPRIMARY, QSECONDARY, QSTRING, QINTEGER, QCLIPBOARD,
  QTIMESTAMP, QTEXT, QDELETE, QMULTIPLE, QINCR, QEMACS_TMP, QTARGETS, QATOM,
  QNULL, QATOM_PAIR, QCOMPOUND_TEXT;

/* Windows clipboard formats */
extern Lisp_Object QCF_TEXT, QCF_BITMAP, QCF_METAFILEPICT, QCF_SYLK, QCF_DIF,
  QCF_TIFF, QCF_OEMTEXT, QCF_DIB, QCF_DIBV5, QCF_PALETTE, QCF_PENDATA,
  QCF_RIFF, QCF_WAVE, QCF_UNICODETEXT, QCF_ENHMETAFILE, QCF_HDROP, QCF_LOCALE,
  QCF_OWNERDISPLAY, QCF_DSPTEXT, QCF_DSPBITMAP, QCF_DSPMETAFILEPICT,
  QCF_DSPENHMETAFILE;

/* Selection strategies */
extern Lisp_Object Qreplace_all, Qreplace_existing, Qappend;

/* "Selection owner couldn't convert selection" */
extern Lisp_Object Qselection_conversion_error;

/* Selection input & output */
Lisp_Object select_convert_in (Lisp_Object selection,
			       Lisp_Object type,
			       Lisp_Object value);
Lisp_Object select_convert_out (Lisp_Object selection,
				Lisp_Object type,
				Lisp_Object value);
Lisp_Object select_coerce (Lisp_Object selection,
			   Lisp_Object type,
			   Lisp_Object value);

/* Notifications */
void handle_selection_clear (Lisp_Object selection_symbol);

void select_notify_buffer_kill (Lisp_Object buffer);

Lisp_Object get_selection_raw_time(Lisp_Object selection);

/* Lisp functions we export for other files' use */
EXFUN (Fregister_selection_data_type, 2);
EXFUN (Fselection_data_type_name, 2);
EXFUN (Favailable_selection_types, 2);
EXFUN (Fselection_owner_p, 1);
EXFUN (Fselection_exists_p, 3);

#endif /* INCLUDED_select_h_ */