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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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/* Emacs shell widget internal header file.
   Copyright (C) 1994, 1995 Sun Microsystems, 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: Not in FSF. */

/* Written by Ben Wing, May, 1994. */

#ifndef INCLUDED_EmacsShellP_h_
#define INCLUDED_EmacsShellP_h_

#include "xintrinsic.h"
#include <X11/ShellP.h>
#include "EmacsShell.h"

/****** TopLevelEmacsShell ******/

typedef struct {		/* new fields for TopLevelEmacsShell class */
  int dummy;
} TopLevelEmacsShellClassPart;

/* full class record declaration */
typedef struct _TopLevelEmacsShellClassRec {
  CoreClassPart core_class;
  CompositeClassPart composite_class;
  ShellClassPart shell_class;
  WMShellClassPart wm_shell_class;
  VendorShellClassPart vendor_shell_class;
  TopLevelShellClassPart top_level_shell_class;
  TopLevelEmacsShellClassPart emacs_shell_class;
} TopLevelEmacsShellClassRec;

typedef struct {		/* new fields for TopLevelEmacsShell widget */
  int width_cells, height_cells;
  int min_width_cells, min_height_cells;
} TopLevelEmacsShellPart;

typedef struct _TopLevelEmacsShellRec {	/* full instance record */
    CorePart core;
    CompositePart composite;
    ShellPart shell;
    WMShellPart wm;
    VendorShellPart vendor;
    TopLevelShellPart top_level;
    TopLevelEmacsShellPart emacs_shell;
} TopLevelEmacsShellRec;

/* class pointer */
extern TopLevelEmacsShellClassRec topLevelEmacsShellClassRec;

/****** TransientEmacsShell ******/

typedef struct {		/* new fields for TransientEmacsShell class */
  int dummy;
} TransientEmacsShellClassPart;

/* full class record declaration */
typedef struct _TransientEmacsShellClassRec {
  CoreClassPart core_class;
  CompositeClassPart composite_class;
  ShellClassPart shell_class;
  WMShellClassPart wm_shell_class;
  VendorShellClassPart vendor_shell_class;
  TransientShellClassPart transient_shell_class;
  TransientEmacsShellClassPart emacs_shell_class;
} TransientEmacsShellClassRec;

typedef struct {		/* new fields for TransientEmacsShell widget */
  int width_cells, height_cells;
  int min_width_cells, min_height_cells;
} TransientEmacsShellPart;

typedef struct _TransientEmacsShellRec {	/* full instance record */
    CorePart core;
    CompositePart composite;
    ShellPart shell;
    WMShellPart wm;
    VendorShellPart vendor;
    TransientShellPart transient;
    TransientEmacsShellPart emacs_shell;
} TransientEmacsShellRec;

/* class pointer */
extern TransientEmacsShellClassRec transientEmacsShellClassRec;

#endif /* INCLUDED_EmacsShellP_h_ */