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1 \input texinfo @c -*-texinfo-*-
2 @c %**start of header
3 @setfilename elisp
4 @settitle GNU Emacs Lisp Reference Manual
5 @c %**end of header
6
7 @ifinfo
8 This version is the edition 2.4.2 of the GNU Emacs Lisp
9 Reference Manual. It corresponds to Emacs Version 19.34.
10 @c Please REMEMBER to update edition number in *four* places in this file
11 @c and also in *one* place in intro.texi
12
13 Published by the Free Software Foundation
14 59 Temple Place, Suite 330
15 Boston, MA 02111-1307 USA
16
17 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
18
19 Permission is granted to make and distribute verbatim copies of this
20 manual provided the copyright notice and this permission notice are
21 preserved on all copies.
22
23 @ignore
24 Permission is granted to process this file through TeX and print the
25 results, provided the printed document carries copying permission notice
26 identical to this one except for the removal of this paragraph (this
27 paragraph not being relevant to the printed manual).
28
29 @end ignore
30 Permission is granted to copy and distribute modified versions of this
31 manual under the conditions for verbatim copying, provided that the
32 entire resulting derived work is distributed under the terms of a
33 permission notice identical to this one.
34
35 Permission is granted to copy and distribute translations of this manual
36 into another language, under the above conditions for modified versions,
37 except that this permission notice may be stated in a translation
38 approved by the Foundation.
39
40 Permission is granted to copy and distribute modified versions of this
41 manual under the conditions for verbatim copying, provided also that the
42 section entitled ``GNU General Public License'' is included exactly as
43 in the original, and provided that the entire resulting derived work is
44 distributed under the terms of a permission notice identical to this
45 one.
46
47 Permission is granted to copy and distribute translations of this manual
48 into another language, under the above conditions for modified versions,
49 except that the section entitled ``GNU General Public License'' may be
50 included in a translation approved by the Free Software Foundation
51 instead of in the original English.
52 @end ifinfo
53
54 @c Combine indices.
55 @synindex cp fn
56 @syncodeindex vr fn
57 @syncodeindex ky fn
58 @syncodeindex pg fn
59 @syncodeindex tp fn
60
61 @setchapternewpage odd
62 @finalout
63
64 @titlepage
65 @title GNU Emacs Lisp Reference Manual
66 @subtitle GNU Emacs Version 19
67 @subtitle for Unix Users
68 @c The edition number appears in several places in this file
69 @c and also in the file intro.texi.
70 @subtitle Revision 2.4.2, December 1996
71
72 @author by Bil Lewis, Dan LaLiberte, Richard Stallman
73 @author and the GNU Manual Group
74 @page
75 @vskip 0pt plus 1filll
76 Copyright @copyright{} 1990, 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
77
78 @sp 2
79 Edition 2.4.2 @*
80 Revised for Emacs Version 19.34,@*
81 July 1996.@*
82 @sp 2
83 ISBN 1-882114-71-X
84
85 @sp 2
86 Published by the Free Software Foundation @*
87 59 Temple Place, Suite 330@*
88 Boston, MA 02111-1307 USA
89
90 Permission is granted to make and distribute verbatim copies of this
91 manual provided the copyright notice and this permission notice are
92 preserved on all copies.
93
94 Permission is granted to copy and distribute modified versions of this
95 manual under the conditions for verbatim copying, provided also that the
96 section entitled ``GNU General Public License'' is included
97 exactly as in the original, and provided that the entire resulting
98 derived work is distributed under the terms of a permission notice
99 identical to this one.
100
101 Permission is granted to copy and distribute translations of this manual
102 into another language, under the above conditions for modified versions,
103 except that the section entitled ``GNU General Public License'' may be
104 included in a translation approved by the Free Software Foundation
105 instead of in the original English.
106
107 Cover art by Etienne Suvasa.
108 @end titlepage
109 @page
110
111 @node Top, Copying, (dir), (dir)
112
113 @ifinfo
114 This Info file contains edition 2.4.2 of the GNU Emacs Lisp
115 Reference Manual, corresponding to GNU Emacs version 19.34.
116 @end ifinfo
117
118 @menu
119 * Copying:: Conditions for copying and changing GNU Emacs.
120 * Introduction:: Introduction and conventions used.
121
122 * Lisp Data Types:: Data types of objects in Emacs Lisp.
123 * Numbers:: Numbers and arithmetic functions.
124 * Strings and Characters:: Strings, and functions that work on them.
125 * Lists:: Lists, cons cells, and related functions.
126 * Sequences Arrays Vectors:: Lists, strings and vectors are called sequences.
127 Certain functions act on any kind of sequence.
128 The description of vectors is here as well.
129 * Symbols:: Symbols represent names, uniquely.
130
131 * Evaluation:: How Lisp expressions are evaluated.
132 * Control Structures:: Conditionals, loops, nonlocal exits.
133 * Variables:: Using symbols in programs to stand for values.
134 * Functions:: A function is a Lisp program
135 that can be invoked from other functions.
136 * Macros:: Macros are a way to extend the Lisp language.
137
138 * Loading:: Reading files of Lisp code into Lisp.
139 * Byte Compilation:: Compilation makes programs run faster.
140 * Debugging:: Tools and tips for debugging Lisp programs.
141
142 * Read and Print:: Converting Lisp objects to text and back.
143 * Minibuffers:: Using the minibuffer to read input.
144 * Command Loop:: How the editor command loop works,
145 and how you can call its subroutines.
146 * Keymaps:: Defining the bindings from keys to commands.
147 * Modes:: Defining major and minor modes.
148 * Documentation:: Writing and using documentation strings.
149
150 * Files:: Accessing files.
151 * Backups and Auto-Saving:: Controlling how backups and auto-save
152 files are made.
153 * Buffers:: Creating and using buffer objects.
154 * Windows:: Manipulating windows and displaying buffers.
155 * Frames:: Making multiple X windows.
156 * Positions:: Buffer positions and motion functions.
157 * Markers:: Markers represent positions and update
158 automatically when the text is changed.
159
160 * Text:: Examining and changing text in buffers.
161 * Searching and Matching:: Searching buffers for strings or regexps.
162 * Syntax Tables:: The syntax table controls word and list parsing.
163 * Abbrevs:: How Abbrev mode works, and its data structures.
164
165 * Processes:: Running and communicating with subprocesses.
166 * System Interface:: Getting the user id, system type, environment
167 variables, and other such things.
168 * Display:: Parameters controlling screen usage.
169 The bell. Waiting for input.
170 * Calendar:: Customizing the calendar and diary.
171
172 Appendices
173
174 * Tips:: Advice for writing Lisp programs.
175 * GNU Emacs Internals:: Building and dumping Emacs;
176 internal data structures.
177 * Standard Errors:: List of all error symbols.
178 * Standard Buffer-Local Variables:: List of variables local in all buffers.
179 * Standard Keymaps:: List of standard keymaps.
180 * Standard Hooks:: List of standard hook variables.
181
182 * Index:: Index including concepts, functions, variables,
183 and other terms.
184
185 --- The Detailed Node Listing ---
186
187 Here are other nodes that are inferiors of those already listed,
188 mentioned here so you can get to them in one step:
189
190 Introduction
191
192 * Caveats:: Flaws and a request for help.
193 * Lisp History:: Emacs Lisp is descended from Maclisp.
194 * Conventions:: How the manual is formatted.
195 * Acknowledgements:: The authors, editors, and sponsors of this manual.
196
197 Conventions
198
199 * Some Terms:: Explanation of terms we use in this manual.
200 * nil and t:: How the symbols @code{nil} and @code{t} are used.
201 * Evaluation Notation:: The format we use for examples of evaluation.
202 * Printing Notation:: The format we use for examples that print output.
203 * Error Messages:: The format we use for examples of errors.
204 * Buffer Text Notation:: The format we use for buffer contents in examples.
205 * Format of Descriptions:: Notation for describing functions, variables, etc.
206
207 Format of Descriptions
208
209 * A Sample Function Description::
210 * A Sample Variable Description::
211
212 Lisp Data Types
213
214 * Printed Representation:: How Lisp objects are represented as text.
215 * Comments:: Comments and their formatting conventions.
216 * Programming Types:: Types found in all Lisp systems.
217 * Editing Types:: Types specific to Emacs.
218 * Type Predicates:: Tests related to types.
219 * Equality Predicates:: Tests of equality between any two objects.
220
221 Programming Types
222
223 * Integer Type:: Numbers without fractional parts.
224 * Floating Point Type:: Numbers with fractional parts and with a large range.
225 * Character Type:: The representation of letters, numbers and
226 control characters.
227 * Sequence Type:: Both lists and arrays are classified as sequences.
228 * Cons Cell Type:: Cons cells, and lists (which are made from cons cells).
229 * Array Type:: Arrays include strings and vectors.
230 * String Type:: An (efficient) array of characters.
231 * Vector Type:: One-dimensional arrays.
232 * Symbol Type:: A multi-use object that refers to a function,
233 variable, property list, or itself.
234 * Function Type:: A piece of executable code you can call from elsewhere.
235 * Macro Type:: A method of expanding an expression into another
236 expression, more fundamental but less pretty.
237 * Primitive Function Type:: A function written in C, callable from Lisp.
238 * Byte-Code Type:: A function written in Lisp, then compiled.
239 * Autoload Type:: A type used for automatically loading seldom-used
240 functions.
241
242 List Type
243
244 * Dotted Pair Notation:: An alternative syntax for lists.
245 * Association List Type:: A specially constructed list.
246
247 Editing Types
248
249 * Buffer Type:: The basic object of editing.
250 * Window Type:: What makes buffers visible.
251 * Window Configuration Type::Save what the screen looks like.
252 * Marker Type:: A position in a buffer.
253 * Process Type:: A process running on the underlying OS.
254 * Stream Type:: Receive or send characters.
255 * Keymap Type:: What function a keystroke invokes.
256 * Syntax Table Type:: What a character means.
257
258 Numbers
259
260 * Integer Basics:: Representation and range of integers.
261 * Float Basics:: Representation and range of floating point.
262 * Predicates on Numbers:: Testing for numbers.
263 * Comparison of Numbers:: Equality and inequality predicates.
264 * Arithmetic Operations:: How to add, subtract, multiply and divide.
265 * Bitwise Operations:: Logical and, or, not, shifting.
266 * Numeric Conversions:: Converting float to integer and vice versa.
267 * Math Functions:: Trig, exponential and logarithmic functions.
268 * Random Numbers:: Obtaining random integers, predictable or not.
269
270 Strings and Characters
271
272 * String Basics:: Basic properties of strings and characters.
273 * Predicates for Strings:: Testing whether an object is a string or char.
274 * Creating Strings:: Functions to allocate new strings.
275 * Text Comparison:: Comparing characters or strings.
276 * String Conversion:: Converting characters or strings and vice versa.
277 * Formatting Strings:: @code{format}: Emacs's analog of @code{printf}.
278 * Character Case:: Case conversion functions.
279
280 Lists
281
282 * Cons Cells:: How lists are made out of cons cells.
283 * Lists as Boxes:: Graphical notation to explain lists.
284 * List-related Predicates:: Is this object a list? Comparing two lists.
285 * List Elements:: Extracting the pieces of a list.
286 * Building Lists:: Creating list structure.
287 * Modifying Lists:: Storing new pieces into an existing list.
288 * Sets And Lists:: A list can represent a finite mathematical set.
289 * Association Lists:: A list can represent a finite relation or mapping.
290
291 Modifying Existing List Structure
292
293 * Setcar:: Replacing an element in a list.
294 * Setcdr:: Replacing part of the list backbone.
295 This can be used to remove or add elements.
296 * Rearrangement:: Reordering the elements in a list; combining lists.
297
298 Sequences, Arrays, and Vectors
299
300 * Sequence Functions:: Functions that accept any kind of sequence.
301 * Arrays:: Characteristics of arrays in Emacs Lisp.
302 * Array Functions:: Functions specifically for arrays.
303 * Vectors:: Functions specifically for vectors.
304
305 Symbols
306
307 * Symbol Components:: Symbols have names, values, function definitions
308 and property lists.
309 * Definitions:: A definition says how a symbol will be used.
310 * Creating Symbols:: How symbols are kept unique.
311 * Property Lists:: Each symbol has a property list
312 for recording miscellaneous information.
313
314 Evaluation
315
316 * Intro Eval:: Evaluation in the scheme of things.
317 * Eval:: How to invoke the Lisp interpreter explicitly.
318 * Forms:: How various sorts of objects are evaluated.
319 * Quoting:: Avoiding evaluation (to put constants in
320 the program).
321
322 Kinds of Forms
323
324 * Self-Evaluating Forms:: Forms that evaluate to themselves.
325 * Symbol Forms:: Symbols evaluate as variables.
326 * Classifying Lists:: How to distinguish various sorts of list forms.
327 * Function Forms:: Forms that call functions.
328 * Macro Forms:: Forms that call macros.
329 * Special Forms:: ``Special forms'' are idiosyncratic primitives,
330 most of them extremely important.
331 * Autoloading:: Functions set up to load files
332 containing their real definitions.
333
334 Control Structures
335
336 * Sequencing:: Evaluation in textual order.
337 * Conditionals:: @code{if}, @code{cond}.
338 * Combining Conditions:: @code{and}, @code{or}, @code{not}.
339 * Iteration:: @code{while} loops.
340 * Nonlocal Exits:: Jumping out of a sequence.
341
342 Nonlocal Exits
343
344 * Catch and Throw:: Nonlocal exits for the program's own purposes.
345 * Examples of Catch:: Showing how such nonlocal exits can be written.
346 * Errors:: How errors are signaled and handled.
347 * Cleanups:: Arranging to run a cleanup form if an
348 error happens.
349
350 Errors
351
352 * Signaling Errors:: How to report an error.
353 * Processing of Errors:: What Emacs does when you report an error.
354 * Handling Errors:: How you can trap errors and continue execution.
355 * Error Symbols:: How errors are classified for trapping them.
356
357 Variables
358
359 * Global Variables:: Variable values that exist permanently, everywhere.
360 * Constant Variables:: Certain "variables" have values that never change.
361 * Local Variables:: Variable values that exist only temporarily.
362 * Void Variables:: Symbols that lack values.
363 * Defining Variables:: A definition says a symbol is used as a variable.
364 * Accessing Variables:: Examining values of variables whose names
365 are known only at run time.
366 * Setting Variables:: Storing new values in variables.
367 * Variable Scoping:: How Lisp chooses among local and global values.
368 * Buffer-Local Variables:: Variable values in effect only in one buffer.
369
370 Scoping Rules for Variable Bindings
371
372 * Scope:: Scope means where in the program a value
373 is visible. Comparison with other languages.
374 * Extent:: Extent means how long in time a value exists.
375 * Impl of Scope:: Two ways to implement dynamic scoping.
376 * Using Scoping:: How to use dynamic scoping carefully and
377 avoid problems.
378
379 Buffer-Local Variables
380
381 * Intro to Buffer-Local:: Introduction and concepts.
382 * Creating Buffer-Local:: Creating and destroying buffer-local bindings.
383 * Default Value:: The default value is seen in buffers
384 that don't have their own local values.
385
386 Functions
387
388 * What Is a Function:: Lisp functions vs primitives; terminology.
389 * Lambda Expressions:: How functions are expressed as Lisp objects.
390 * Function Names:: A symbol can serve as the name of a function.
391 * Defining Functions:: Lisp expressions for defining functions.
392 * Calling Functions:: How to use an existing function.
393 * Mapping Functions:: Applying a function to each element of a list, etc.
394 * Anonymous Functions:: Lambda-expressions are functions with no names.
395 * Function Cells:: Accessing or setting the function definition
396 of a symbol.
397 * Related Topics:: Cross-references to specific Lisp primitives
398 that have a special bearing on how
399 functions work.
400
401 Lambda Expressions
402
403 * Lambda Components:: The parts of a lambda expression.
404 * Simple Lambda:: A simple example.
405 * Argument List:: Details and special features of argument lists.
406 * Function Documentation:: How to put documentation in a function.
407
408 Macros
409
410 * Simple Macro:: A basic example.
411 * Expansion:: How, when and why macros are expanded.
412 * Compiling Macros:: How macros are expanded by the compiler.
413 * Defining Macros:: How to write a macro definition.
414 * Backquote:: Easier construction of list structure.
415 * Problems with Macros:: Don't evaluate the macro arguments too many times.
416 Don't hide the user's variables.
417
418 Loading
419
420 * How Programs Do Loading:: The @code{load} function and others.
421 * Autoload:: Setting up a function to autoload.
422 * Named Features:: Loading a library if it isn't already loaded.
423 * Repeated Loading:: Precautions about loading a file twice.
424
425 Byte Compilation
426
427 * Compilation Functions:: Byte compilation functions.
428 * Disassembly:: Disassembling byte-code; how to read byte-code.
429
430 Debugging Lisp Programs
431
432 * Debugger:: How the Emacs Lisp debugger is implemented.
433 * Syntax Errors:: How to find syntax errors.
434 * Compilation Errors:: How to find errors that show up in
435 byte compilation.
436 * Edebug:: A source-level Emacs Lisp debugger.
437
438 The Lisp Debugger
439
440 * Error Debugging:: Entering the debugger when an error happens.
441 * Function Debugging:: Entering it when a certain function is called.
442 * Explicit Debug:: Entering it at a certain point in the program.
443 * Using Debugger:: What the debugger does; what you see while in it.
444 * Debugger Commands:: Commands used while in the debugger.
445 * Invoking the Debugger:: How to call the function @code{debug}.
446 * Internals of Debugger:: Subroutines of the debugger, and global variables.
447
448 Debugging Invalid Lisp Syntax
449
450 * Excess Open:: How to find a spurious open paren or missing close.
451 * Excess Close:: How to find a spurious close paren or missing open.
452
453 Reading and Printing Lisp Objects
454
455 * Streams Intro:: Overview of streams, reading and printing.
456 * Input Streams:: Various data types that can be used as
457 input streams.
458 * Input Functions:: Functions to read Lisp objects from text.
459 * Output Streams:: Various data types that can be used as
460 output streams.
461 * Output Functions:: Functions to print Lisp objects as text.
462
463 Minibuffers
464
465 * Intro to Minibuffers:: Basic information about minibuffers.
466 * Text from Minibuffer:: How to read a straight text string.
467 * Object from Minibuffer:: How to read a Lisp object or expression.
468 * Completion:: How to invoke and customize completion.
469 * Yes-or-No Queries:: Asking a question with a simple answer.
470 * Minibuffer Misc:: Various customization hooks and variables.
471
472 Completion
473
474 * Basic Completion:: Low-level functions for completing strings.
475 (These are too low level to use the minibuffer.)
476 * Minibuffer Completion:: Invoking the minibuffer with completion.
477 * Completion Commands:: Minibuffer commands that do completion.
478 * High-Level Completion:: Convenient special cases of completion
479 (reading buffer name, file name, etc.)
480 * Reading File Names:: Using completion to read file names.
481 * Programmed Completion:: Finding the completions for a given file name.
482
483 Command Loop
484
485 * Command Overview:: How the command loop reads commands.
486 * Defining Commands:: Specifying how a function should read arguments.
487 * Interactive Call:: Calling a command, so that it will read arguments.
488 * Command Loop Info:: Variables set by the command loop for you to examine.
489 * Input Events:: What input looks like when you read it.
490 * Reading Input:: How to read input events from the keyboard or mouse.
491 * Waiting:: Waiting for user input or elapsed time.
492 * Quitting:: How @kbd{C-g} works. How to catch or defer quitting.
493 * Prefix Command Arguments:: How the commands to set prefix args work.
494 * Recursive Editing:: Entering a recursive edit,
495 and why you usually shouldn't.
496 * Disabling Commands:: How the command loop handles disabled commands.
497 * Command History:: How the command history is set up, and how accessed.
498 * Keyboard Macros:: How keyboard macros are implemented.
499
500 Defining Commands
501
502 * Using Interactive:: General rules for @code{interactive}.
503 * Interactive Codes:: The standard letter-codes for reading arguments
504 in various ways.
505 * Interactive Examples:: Examples of how to read interactive arguments.
506
507 Keymaps
508
509 * Keymap Terminology:: Definitions of terms pertaining to keymaps.
510 * Format of Keymaps:: What a keymap looks like as a Lisp object.
511 * Creating Keymaps:: Functions to create and copy keymaps.
512 * Inheritance and Keymaps:: How one keymap can inherit the bindings
513 of another keymap.
514 * Prefix Keys:: Defining a key with a keymap as its definition.
515 * Menu Keymaps:: A keymap can define a menu for X windows
516 or for use from the terminal.
517 * Active Keymaps:: Each buffer has a local keymap
518 to override the standard (global) bindings.
519 Each minor mode can also override them.
520 * Key Lookup:: How extracting elements from keymaps works.
521 * Functions for Key Lookup:: How to request key lookup.
522 * Changing Key Bindings:: Redefining a key in a keymap.
523 * Key Binding Commands:: Interactive interfaces for redefining keys.
524 * Scanning Keymaps:: Looking through all keymaps, for printing help.
525
526 Major and Minor Modes
527
528 * Major Modes:: Defining major modes.
529 * Minor Modes:: Defining minor modes.
530 * Mode Line Format:: Customizing the text that appears in the mode line.
531 * Hooks:: How to use hooks; how to write code that
532 provides hooks.
533
534 Major Modes
535
536 * Major Mode Conventions:: Coding conventions for keymaps, etc.
537 * Example Major Modes:: Text mode and Lisp modes.
538 * Auto Major Mode:: How Emacs chooses the major mode automatically.
539 * Mode Help:: Finding out how to use a mode.
540
541 Minor Modes
542
543 * Minor Mode Conventions:: Tips for writing a minor mode.
544 * Keymaps and Minor Modes:: How a minor mode can have its own keymap.
545
546 Mode Line Format
547
548 * Mode Line Data:: The data structure that controls the mode line.
549 * Mode Line Variables:: Variables used in that data structure.
550 * %-Constructs:: Putting information into a mode line.
551
552 Documentation
553
554 * Documentation Basics:: Good style for doc strings.
555 Where to put them. How Emacs stores them.
556 * Accessing Documentation:: How Lisp programs can access doc strings.
557 * Keys in Documentation:: Substituting current key bindings.
558 * Describing Characters:: Making printable descriptions of
559 non-printing characters and key sequences.
560 * Help Functions:: Subroutines used by Emacs help facilities.
561
562 Files
563
564 * Visiting Files:: Reading files into Emacs buffers for editing.
565 * Saving Buffers:: Writing changed buffers back into files.
566 * Reading from Files:: Reading files into other buffers.
567 * Writing to Files:: Writing new files from parts of buffers.
568 * File Locks:: Locking and unlocking files, to prevent
569 simultaneous editing by two people.
570 * Information about Files:: Testing existence, accessibility, size of files.
571 * Contents of Directories:: Getting a list of the files in a directory.
572 * Changing File Attributes:: Renaming files, changing protection, etc.
573 * File Names:: Decomposing and expanding file names.
574
575 Visiting Files
576
577 * Visiting Functions:: The usual interface functions for visiting.
578 * Subroutines of Visiting:: Lower-level subroutines that they use.
579
580 Information about Files
581
582 * Testing Accessibility:: Is a given file readable? Writable?
583 * Kinds of Files:: Is it a directory? A link?
584 * File Attributes:: How large is it? Any other names? Etc.
585
586 File Names
587
588 * File Name Components:: The directory part of a file name, and the rest.
589 * Directory Names:: A directory's name as a directory
590 is different from its name as a file.
591 * Relative File Names:: Some file names are relative to a
592 current directory.
593 * File Name Expansion:: Converting relative file names to absolute ones.
594 * Unique File Names:: Generating names for temporary files.
595 * File Name Completion:: Finding the completions for a given file name.
596
597 Backups and Auto-Saving
598
599 * Backup Files:: How backup files are made; how their names
600 are chosen.
601 * Auto-Saving:: How auto-save files are made; how their
602 names are chosen.
603 * Reverting:: @code{revert-buffer}, and how to customize
604 what it does.
605
606 Backup Files
607
608 * Making Backups:: How Emacs makes backup files, and when.
609 * Rename or Copy:: Two alternatives: renaming the old file
610 or copying it.
611 * Numbered Backups:: Keeping multiple backups for each source file.
612 * Backup Names:: How backup file names are computed; customization.
613
614 Buffers
615
616 * Buffer Basics:: What is a buffer?
617 * Buffer Names:: Accessing and changing buffer names.
618 * Buffer File Name:: The buffer file name indicates which file
619 is visited.
620 * Buffer Modification:: A buffer is @dfn{modified} if it needs to be saved.
621 * Modification Time:: Determining whether the visited file was changed
622 ``behind Emacs's back''.
623 * Read Only Buffers:: Modifying text is not allowed in a
624 read-only buffer.
625 * The Buffer List:: How to look at all the existing buffers.
626 * Creating Buffers:: Functions that create buffers.
627 * Killing Buffers:: Buffers exist until explicitly killed.
628 * Current Buffer:: Designating a buffer as current
629 so primitives will access its contents.
630
631 Windows
632
633 * Basic Windows:: Basic information on using windows.
634 * Splitting Windows:: Splitting one window into two windows.
635 * Deleting Windows:: Deleting a window gives its space to other windows.
636 * Selecting Windows:: The selected window is the one that you edit in.
637 * Cyclic Window Ordering:: Moving around the existing windows.
638 * Buffers and Windows:: Each window displays the contents of a buffer.
639 * Displaying Buffers:: Higher-lever functions for displaying a buffer
640 and choosing a window for it.
641 * Window Point:: Each window has its own location of point.
642 * Window Start:: The display-start position controls which text
643 is on-screen in the window.
644 * Vertical Scrolling:: Moving text up and down in the window.
645 * Scrolling Hooks:: Hooks that run when you scroll a window.
646 * Horizontal Scrolling:: Moving text sideways on the window.
647 * Size of Window:: Accessing the size of a window.
648 * Resizing Windows:: Changing the size of a window.
649 * Window Configurations:: Saving and restoring the state of the screen.
650
651 Frames
652
653 * Creating Frames:: Creating additional frames.
654 * Multiple Displays:: Creating frames on other X displays.
655 * Frame Parameters:: Controlling frame size, position, font, etc.
656 * Frame Titles:: Automatic updating of frame titles.
657 * Deleting Frames:: Frames last until explicitly deleted.
658 * Finding All Frames:: How to examine all existing frames.
659 * Frames and Windows:: A frame contains windows;
660 display of text always works through windows.
661 * Minibuffers and Frames:: How a frame finds the minibuffer to use.
662 * Input Focus:: Specifying the selected frame.
663 * Visibility of Frames:: Frames may be visible or invisible, or icons.
664 * Raising and Lowering:: Raising a frame makes it hide other X windows;
665 lowering it makes the others hide them.
666 * Frame Configurations:: Saving the state of all frames.
667 * Mouse Tracking:: Getting events that say when the mouse moves.
668 * Mouse Position:: Asking where the mouse is, or moving it.
669 * Pop-Up Menus:: Displaying a menu for the user to select from.
670 * Dialog Boxes:: Displaying a box to ask yes or no.
671 * Pointer Shapes:: Specifying the shape of the mouse pointer.
672 * X Selections:: Transferring text to and from other X clients.
673 * Color Names:: Getting the definitions of color names.
674 * Resources:: Getting resource values from the server.
675 * Server Data:: Getting info about the X server.
676
677 Positions
678
679 * Point:: The special position where editing takes place.
680 * Motion:: Changing point.
681 * Excursions:: Temporary motion and buffer changes.
682 * Narrowing:: Restricting editing to a portion of the buffer.
683
684 Motion
685
686 * Character Motion:: Moving in terms of characters.
687 * Word Motion:: Moving in terms of words.
688 * Buffer End Motion:: Moving to the beginning or end of the buffer.
689 * Text Lines:: Moving in terms of lines of text.
690 * Screen Lines:: Moving in terms of lines as displayed.
691 * List Motion:: Moving by parsing lists and sexps.
692 * Skipping Characters:: Skipping characters belonging to a certain set.
693
694 Markers
695
696 * Overview of Markers:: The components of a marker, and how it relocates.
697 * Predicates on Markers:: Testing whether an object is a marker.
698 * Creating Markers:: Making empty markers or markers at certain places.
699 * Information from Markers:: Finding the marker's buffer or character
700 position.
701 * Changing Markers:: Moving the marker to a new buffer or position.
702 * The Mark:: How ``the mark'' is implemented with a marker.
703 * The Region:: How to access ``the region''.
704
705 Text
706
707 * Near Point:: Examining text in the vicinity of point.
708 * Buffer Contents:: Examining text in a general fashion.
709 * Insertion:: Adding new text to a buffer.
710 * Commands for Insertion:: User-level commands to insert text.
711 * Deletion:: Removing text from a buffer.
712 * User-Level Deletion:: User-level commands to delete text.
713 * The Kill Ring:: Where removed text sometimes is saved for
714 later use.
715 * Undo:: Undoing changes to the text of a buffer.
716 * Auto Filling:: How auto-fill mode is implemented to break lines.
717 * Filling:: Functions for explicit filling.
718 * Margins:: How to specify margins for filling commands.
719 * Sorting:: Functions for sorting parts of the buffer.
720 * Indentation:: Functions to insert or adjust indentation.
721 * Columns:: Computing horizontal positions, and using them.
722 * Case Changes:: Case conversion of parts of the buffer.
723 * Text Properties:: Assigning Lisp property lists to text characters.
724 * Substitution:: Replacing a given character wherever it appears.
725 * Transposition:: Swapping two portions of a buffer.
726 * Registers:: How registers are implemented. Accessing
727 the text or position stored in a register.
728 * Change Hooks:: Supplying functions to be run when text is changed.
729
730 The Kill Ring
731
732 * Kill Ring Concepts:: What text looks like in the kill ring.
733 * Kill Functions:: Functions that kill text.
734 * Yank Commands:: Commands that access the kill ring.
735 * Low-Level Kill Ring:: Functions and variables for kill ring access.
736 * Internals of Kill Ring:: Variables that hold kill-ring data.
737
738 Indentation
739
740 * Primitive Indent:: Functions used to count and insert indentation.
741 * Mode-Specific Indent:: Customize indentation for different modes.
742 * Region Indent:: Indent all the lines in a region.
743 * Relative Indent:: Indent the current line based on previous lines.
744 * Indent Tabs:: Adjustable, typewriter-like tab stops.
745 * Motion by Indent:: Move to first non-blank character.
746
747 Text Properties
748
749 * Examining Properties:: Looking at the properties of one character.
750 * Changing Properties:: Setting the properties of a range of text.
751 * Property Search:: Searching for where a property changes value.
752 * Special Properties:: Particular properties with special meanings.
753 * Format Properties:: Properties for representing formatting of text.
754 * Sticky Properties:: How inserted text gets properties from
755 neighboring text.
756 * Saving Properties:: Saving text properties in files, and reading
757 them back.
758 * Lazy Properties:: Computing text properties in a lazy fashion
759 only when text is examined.
760 * Not Intervals:: Why text properties do not use
761 Lisp-visible text intervals.
762
763 Searching and Matching
764
765 * String Search:: Search for an exact match.
766 * Regular Expressions:: Describing classes of strings.
767 * Regexp Search:: Searching for a match for a regexp.
768 * Match Data:: Finding out which part of the text matched
769 various parts of a regexp, after regexp search.
770 * Saving Match Data:: Saving and restoring this information.
771 * Standard Regexps:: Useful regexps for finding sentences, pages,...
772 * Searching and Case:: Case-independent or case-significant searching.
773
774 Regular Expressions
775
776 * Syntax of Regexps:: Rules for writing regular expressions.
777 * Regexp Example:: Illustrates regular expression syntax.
778
779 Syntax Tables
780
781 * Syntax Descriptors:: How characters are classified.
782 * Syntax Table Functions:: How to create, examine and alter syntax tables.
783 * Parsing Expressions:: Parsing balanced expressions
784 using the syntax table.
785 * Standard Syntax Tables:: Syntax tables used by various major modes.
786 * Syntax Table Internals:: How syntax table information is stored.
787
788 Syntax Descriptors
789
790 * Syntax Class Table:: Table of syntax classes.
791 * Syntax Flags:: Additional flags each character can have.
792
793 Abbrevs And Abbrev Expansion
794
795 * Abbrev Mode:: Setting up Emacs for abbreviation.
796 * Tables: Abbrev Tables. Creating and working with abbrev tables.
797 * Defining Abbrevs:: Specifying abbreviations and their expansions.
798 * Files: Abbrev Files. Saving abbrevs in files.
799 * Expansion: Abbrev Expansion. Controlling expansion; expansion subroutines.
800 * Standard Abbrev Tables:: Abbrev tables used by various major modes.
801
802 Processes
803
804 * Subprocess Creation:: Functions that start subprocesses.
805 * Synchronous Processes:: Details of using synchronous subprocesses.
806 * Asynchronous Processes:: Starting up an asynchronous subprocess.
807 * Deleting Processes:: Eliminating an asynchronous subprocess.
808 * Process Information:: Accessing run-status and other attributes.
809 * Input to Processes:: Sending input to an asynchronous subprocess.
810 * Signals to Processes:: Stopping, continuing or interrupting
811 an asynchronous subprocess.
812 * Output from Processes:: Collecting output from an asynchronous subprocess.
813 * Sentinels:: Sentinels run when process run-status changes.
814 * Network:: Opening network connections.
815
816 Receiving Output from Processes
817
818 * Process Buffers:: If no filter, output is put in a buffer.
819 * Filter Functions:: Filter functions accept output from the process.
820 * Accepting Output:: How to wait until process output arrives.
821
822 Operating System Interface
823
824 * Starting Up:: Customizing Emacs start-up processing.
825 * Getting Out:: How exiting works (permanent or temporary).
826 * System Environment:: Distinguish the name and kind of system.
827 * Terminal Input:: Recording terminal input for debugging.
828 * Terminal Output:: Recording terminal output for debugging.
829 * Flow Control:: How to turn output flow control on or off.
830 * Batch Mode:: Running Emacs without terminal interaction.
831
832 Starting Up Emacs
833
834 * Start-up Summary:: Sequence of actions Emacs performs at start-up.
835 * Init File:: Details on reading the init file (@file{.emacs}).
836 * Terminal-Specific:: How the terminal-specific Lisp file is read.
837 * Command Line Arguments:: How command line arguments are processed,
838 and how you can customize them.
839
840 Getting out of Emacs
841
842 * Killing Emacs:: Exiting Emacs irreversibly.
843 * Suspending Emacs:: Exiting Emacs reversibly.
844
845 Emacs Display
846
847 * Refresh Screen:: Clearing the screen and redrawing everything on it.
848 * Truncation:: Folding or wrapping long text lines.
849 * The Echo Area:: Where messages are displayed.
850 * Selective Display:: Hiding part of the buffer text.
851 * Overlay Arrow:: Display of an arrow to indicate position.
852 * Temporary Displays:: Displays that go away automatically.
853 * Waiting:: Forcing display update and waiting for user.
854 * Blinking:: How Emacs shows the matching open parenthesis.
855 * Usual Display:: How control characters are displayed.
856 * Beeping:: Audible signal to the user.
857 * Window Systems:: Which window system is being used.
858
859 GNU Emacs Internals
860
861 * Building Emacs:: How to preload Lisp libraries into Emacs.
862 * Pure Storage:: A kludge to make preloaded Lisp functions sharable.
863 * Garbage Collection:: Reclaiming space for Lisp objects no longer used.
864 * Object Internals:: Data formats of buffers, windows, processes.
865 * Writing Emacs Primitives:: Writing C code for Emacs.
866
867 Object Internals
868
869 * Buffer Internals:: Components of a buffer structure.
870 * Window Internals:: Components of a window structure.
871 * Process Internals:: Components of a process structure.
872 @end menu
873
874 @include intro.texi
875 @include objects.texi
876 @include numbers.texi
877 @include strings.texi
878
879 @include lists.texi
880 @include sequences.texi
881 @include symbols.texi
882 @include eval.texi
883
884 @include control.texi
885 @include variables.texi
886 @include functions.texi
887 @include macros.texi
888
889 @include loading.texi
890 @include compile.texi
891 @include debugging.texi
892 @include streams.texi
893
894 @include minibuf.texi
895 @include commands.texi
896 @include keymaps.texi
897 @include modes.texi
898
899 @include help.texi
900 @include files.texi
901 @include backups.texi
902 @include buffers.texi
903
904 @include windows.texi
905 @include frames.texi
906 @include positions.texi
907 @include markers.texi
908 @include text.texi
909
910 @include searching.texi
911 @include syntax.texi
912 @include abbrevs.texi
913
914 @include processes.texi
915 @include os.texi
916 @include display.texi
917 @include calendar.texi
918
919 @c MOVE to Emacs Manual: include misc-modes.texi
920
921 @c appendices
922
923 @c REMOVE this: include non-hacker.texi
924
925 @include tips.texi
926 @include internals.texi
927 @include errors.texi
928 @include locals.texi
929 @include maps.texi
930 @include hooks.texi
931
932 @include index.texi
933
934 @c Print the tables of contents
935 @summarycontents
936 @contents
937 @c That's all
938
939 @bye
940
941 \f
942 These words prevent "local variables" above from confusing Emacs.