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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 @c Version of the manual and of Emacs.
8 @c Please remember to update these in vol1.texi and vol2.texi as well.
9 @c (See comments for EDITION in emacs.texi)
10 @set VERSION 3.1
11 @include emacsver.texi
12 @set DATE May 2012
13
14 @c in general, keep the following line commented out, unless doing a
15 @c copy of this manual that will be published. The manual should go
16 @c onto the distribution in the full, 8.5 x 11" size.
17 @c @set smallbook
18
19 @ifset smallbook
20 @smallbook
21 @end ifset
22
23 @c per rms and peterb, use 10pt fonts for the main text, mostly to
24 @c save on paper cost.
25 @c Do this inside @tex for now, so current makeinfo does not complain.
26 @tex
27 @ifset smallbook
28 @fonttextsize 10
29 @end ifset
30 \global\hbadness=6666 % don't worry about not-too-underfull boxes
31 @end tex
32
33 @c Combine indices.
34 @synindex cp fn
35 @syncodeindex vr fn
36 @syncodeindex ky fn
37 @syncodeindex pg fn
38 @c We use the "type index" to index new functions and variables.
39 @c @syncodeindex tp fn
40
41 @copying
42 @iftex
43 This is edition @value{VERSION} of the @cite{GNU Emacs Lisp Reference Manual},@*
44 @end iftex
45 @ifnottex
46 This is the @cite{GNU Emacs Lisp Reference Manual}
47 @end ifnottex
48 corresponding to Emacs version @value{EMACSVER}.
49
50 Copyright @copyright{} 1990-1996, 1998-2012 Free Software Foundation, Inc.
51
52 @quotation
53 Permission is granted to copy, distribute and/or modify this document
54 under the terms of the GNU Free Documentation License, Version 1.3 or
55 any later version published by the Free Software Foundation; with the
56 Invariant Sections being ``GNU General Public License,'' with the
57 Front-Cover texts being ``A GNU Manual,'' and with the Back-Cover
58 Texts as in (a) below. A copy of the license is included in the
59 section entitled ``GNU Free Documentation License.''
60
61 (a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
62 modify this GNU manual. Buying copies from the FSF supports it in
63 developing GNU and promoting software freedom.''
64 @end quotation
65 @end copying
66
67 @documentencoding ISO-8859-1
68
69 @dircategory GNU Emacs Lisp
70 @direntry
71 * Elisp: (elisp). The Emacs Lisp Reference Manual.
72 @end direntry
73
74 @titlepage
75 @title GNU Emacs Lisp Reference Manual
76 @subtitle For Emacs Version @value{EMACSVER}
77 @subtitle Revision @value{VERSION}, @value{DATE}
78
79 @author by Bil Lewis, Dan LaLiberte, Richard Stallman,
80 @author the GNU Manual Group, et al.
81 @page
82 @vskip 0pt plus 1filll
83 @insertcopying
84
85 @sp 2
86 Published by the Free Software Foundation @*
87 51 Franklin St, Fifth Floor @*
88 Boston, MA 02110-1301 @*
89 USA @*
90 ISBN 1-882114-74-4
91
92 @sp 2
93 Cover art by Etienne Suvasa.
94 @end titlepage
95
96
97 @c Print the tables of contents
98 @summarycontents
99 @contents
100
101
102 @ifnottex
103 @node Top, Introduction, (dir), (dir)
104 @top Emacs Lisp
105
106 @insertcopying
107 @end ifnottex
108
109 @c Copy any updates to vol1.texi and vol2.texi.
110 @menu
111 * Introduction:: Introduction and conventions used.
112
113 * Lisp Data Types:: Data types of objects in Emacs Lisp.
114 * Numbers:: Numbers and arithmetic functions.
115 * Strings and Characters:: Strings, and functions that work on them.
116 * Lists:: Lists, cons cells, and related functions.
117 * Sequences Arrays Vectors:: Lists, strings and vectors are called sequences.
118 Certain functions act on any kind of sequence.
119 The description of vectors is here as well.
120 * Hash Tables:: Very fast lookup-tables.
121 * Symbols:: Symbols represent names, uniquely.
122
123 * Evaluation:: How Lisp expressions are evaluated.
124 * Control Structures:: Conditionals, loops, nonlocal exits.
125 * Variables:: Using symbols in programs to stand for values.
126 * Functions:: A function is a Lisp program
127 that can be invoked from other functions.
128 * Macros:: Macros are a way to extend the Lisp language.
129 * Customization:: Making variables and faces customizable.
130
131 * Loading:: Reading files of Lisp code into Lisp.
132 * Byte Compilation:: Compilation makes programs run faster.
133 * Advising Functions:: Adding to the definition of a function.
134 * Debugging:: Tools and tips for debugging Lisp programs.
135
136 * Read and Print:: Converting Lisp objects to text and back.
137 * Minibuffers:: Using the minibuffer to read input.
138 * Command Loop:: How the editor command loop works,
139 and how you can call its subroutines.
140 * Keymaps:: Defining the bindings from keys to commands.
141 * Modes:: Defining major and minor modes.
142 * Documentation:: Writing and using documentation strings.
143
144 * Files:: Accessing files.
145 * Backups and Auto-Saving:: Controlling how backups and auto-save
146 files are made.
147 * Buffers:: Creating and using buffer objects.
148 * Windows:: Manipulating windows and displaying buffers.
149 * Frames:: Making multiple system-level windows.
150 * Positions:: Buffer positions and motion functions.
151 * Markers:: Markers represent positions and update
152 automatically when the text is changed.
153
154 * Text:: Examining and changing text in buffers.
155 * Non-ASCII Characters:: Non-ASCII text in buffers and strings.
156 * Searching and Matching:: Searching buffers for strings or regexps.
157 * Syntax Tables:: The syntax table controls word and list parsing.
158 * Abbrevs:: How Abbrev mode works, and its data structures.
159
160 * Processes:: Running and communicating with subprocesses.
161 * Display:: Features for controlling the screen display.
162 * System Interface:: Getting the user id, system type, environment
163 variables, and other such things.
164
165 * Packaging:: Preparing Lisp code for distribution.
166
167 Appendices
168
169 * Antinews:: Info for users downgrading to Emacs 23.
170 * GNU Free Documentation License:: The license for this documentation.
171 * GPL:: Conditions for copying and changing GNU Emacs.
172 * Tips:: Advice and coding conventions for Emacs Lisp.
173 * GNU Emacs Internals:: Building and dumping Emacs;
174 internal data structures.
175 * Standard Errors:: List of some standard error symbols.
176 * Standard Keymaps:: List of some standard keymaps.
177 * Standard Hooks:: List of some standard hook variables.
178
179 * Index:: Index including concepts, functions, variables,
180 and other terms.
181
182 @ignore
183 * New Symbols:: New functions and variables in Emacs @value{EMACSVER}.
184 @end ignore
185
186 @c Do NOT modify the following 3 lines! They must have this form to
187 @c be correctly identified by `texinfo-multiple-files-update'. In
188 @c particular, the detailed menu header line MUST be identical to the
189 @c value of `texinfo-master-menu-header'. See texnfo-upd.el.
190 @c Copy any updates to vol1.texi and vol2.texi.
191
192 @detailmenu
193 --- The Detailed Node Listing ---
194 ---------------------------------
195
196 Here are other nodes that are subnodes of those already listed,
197 mentioned here so you can get to them in one step:
198
199 Introduction
200
201 * Caveats:: Flaws and a request for help.
202 * Lisp History:: Emacs Lisp is descended from Maclisp.
203 * Conventions:: How the manual is formatted.
204 * Version Info:: Which Emacs version is running?
205 * Acknowledgements:: The authors, editors, and sponsors of this manual.
206
207 Conventions
208
209 * Some Terms:: Explanation of terms we use in this manual.
210 * nil and t:: How the symbols @code{nil} and @code{t} are used.
211 * Evaluation Notation:: The format we use for examples of evaluation.
212 * Printing Notation:: The format we use when examples print text.
213 * Error Messages:: The format we use for examples of errors.
214 * Buffer Text Notation:: The format we use for buffer contents in examples.
215 * Format of Descriptions:: Notation for describing functions, variables, etc.
216
217 Format of Descriptions
218
219 * A Sample Function Description:: A description of an imaginary
220 function, @code{foo}.
221 * A Sample Variable Description:: A description of an imaginary
222 variable, @code{electric-future-map}.
223
224 Lisp Data Types
225
226 * Printed Representation:: How Lisp objects are represented as text.
227 * Comments:: Comments and their formatting conventions.
228 * Programming Types:: Types found in all Lisp systems.
229 * Editing Types:: Types specific to Emacs.
230 * Circular Objects:: Read syntax for circular structure.
231 * Type Predicates:: Tests related to types.
232 * Equality Predicates:: Tests of equality between any two objects.
233
234 Programming Types
235
236 * Integer Type:: Numbers without fractional parts.
237 * Floating Point Type:: Numbers with fractional parts and with a large range.
238 * Character Type:: The representation of letters, numbers and
239 control characters.
240 * Symbol Type:: A multi-use object that refers to a function,
241 variable, or property list, and has a unique identity.
242 * Sequence Type:: Both lists and arrays are classified as sequences.
243 * Cons Cell Type:: Cons cells, and lists (which are made from cons cells).
244 * Array Type:: Arrays include strings and vectors.
245 * String Type:: An (efficient) array of characters.
246 * Vector Type:: One-dimensional arrays.
247 * Char-Table Type:: One-dimensional sparse arrays indexed by characters.
248 * Bool-Vector Type:: One-dimensional arrays of @code{t} or @code{nil}.
249 * Hash Table Type:: Super-fast lookup tables.
250 * Function Type:: A piece of executable code you can call from elsewhere.
251 * Macro Type:: A method of expanding an expression into another
252 expression, more fundamental but less pretty.
253 * Primitive Function Type:: A function written in C, callable from Lisp.
254 * Byte-Code Type:: A function written in Lisp, then compiled.
255 * Autoload Type:: A type used for automatically loading seldom-used
256 functions.
257
258 Character Type
259
260 * Basic Char Syntax:: Syntax for regular characters.
261 * General Escape Syntax:: How to specify characters by their codes.
262 * Ctl-Char Syntax:: Syntax for control characters.
263 * Meta-Char Syntax:: Syntax for meta-characters.
264 * Other Char Bits:: Syntax for hyper-, super-, and alt-characters.
265
266 Cons Cell and List Types
267
268 * Box Diagrams:: Drawing pictures of lists.
269 * Dotted Pair Notation:: A general syntax for cons cells.
270 * Association List Type:: A specially constructed list.
271
272 String Type
273
274 * Syntax for Strings:: How to specify Lisp strings.
275 * Non-ASCII in Strings:: International characters in strings.
276 * Nonprinting Characters:: Literal unprintable characters in strings.
277 * Text Props and Strings:: Strings with text properties.
278
279 Editing Types
280
281 * Buffer Type:: The basic object of editing.
282 * Marker Type:: A position in a buffer.
283 * Window Type:: Buffers are displayed in windows.
284 * Frame Type:: Windows subdivide frames.
285 * Terminal Type:: A terminal device displays frames.
286 * Window Configuration Type:: Recording the way a frame is subdivided.
287 * Frame Configuration Type:: Recording the status of all frames.
288 * Process Type:: A subprocess of Emacs running on the underlying OS.
289 * Stream Type:: Receive or send characters.
290 * Keymap Type:: What function a keystroke invokes.
291 * Overlay Type:: How an overlay is represented.
292 * Font Type:: Fonts for displaying text.
293
294 Numbers
295
296 * Integer Basics:: Representation and range of integers.
297 * Float Basics:: Representation and range of floating point.
298 * Predicates on Numbers:: Testing for numbers.
299 * Comparison of Numbers:: Equality and inequality predicates.
300 * Numeric Conversions:: Converting float to integer and vice versa.
301 * Arithmetic Operations:: How to add, subtract, multiply and divide.
302 * Rounding Operations:: Explicitly rounding floating point numbers.
303 * Bitwise Operations:: Logical and, or, not, shifting.
304 * Math Functions:: Trig, exponential and logarithmic functions.
305 * Random Numbers:: Obtaining random integers, predictable or not.
306
307 Strings and Characters
308
309 * String Basics:: Basic properties of strings and characters.
310 * Predicates for Strings:: Testing whether an object is a string or char.
311 * Creating Strings:: Functions to allocate new strings.
312 * Modifying Strings:: Altering the contents of an existing string.
313 * Text Comparison:: Comparing characters or strings.
314 * String Conversion:: Converting to and from characters and strings.
315 * Formatting Strings:: @code{format}: Emacs's analogue of @code{printf}.
316 * Case Conversion:: Case conversion functions.
317 * Case Tables:: Customizing case conversion.
318
319 Lists
320
321 * Cons Cells:: How lists are made out of cons cells.
322 * List-related Predicates:: Is this object a list? Comparing two lists.
323 * List Elements:: Extracting the pieces of a list.
324 * Building Lists:: Creating list structure.
325 * List Variables:: Modifying lists stored in variables.
326 * Modifying Lists:: Storing new pieces into an existing list.
327 * Sets And Lists:: A list can represent a finite mathematical set.
328 * Association Lists:: A list can represent a finite relation or mapping.
329
330 Modifying Existing List Structure
331
332 * Setcar:: Replacing an element in a list.
333 * Setcdr:: Replacing part of the list backbone.
334 This can be used to remove or add elements.
335 * Rearrangement:: Reordering the elements in a list; combining lists.
336
337 Sequences, Arrays, and Vectors
338
339 * Sequence Functions:: Functions that accept any kind of sequence.
340 * Arrays:: Characteristics of arrays in Emacs Lisp.
341 * Array Functions:: Functions specifically for arrays.
342 * Vectors:: Special characteristics of Emacs Lisp vectors.
343 * Vector Functions:: Functions specifically for vectors.
344 * Char-Tables:: How to work with char-tables.
345 * Bool-Vectors:: How to work with bool-vectors.
346 * Rings:: Managing a fixed-size ring of objects.
347
348 Hash Tables
349
350 * Creating Hash:: Functions to create hash tables.
351 * Hash Access:: Reading and writing the hash table contents.
352 * Defining Hash:: Defining new comparison methods.
353 * Other Hash:: Miscellaneous.
354
355 Symbols
356
357 * Symbol Components:: Symbols have names, values, function definitions
358 and property lists.
359 * Definitions:: A definition says how a symbol will be used.
360 * Creating Symbols:: How symbols are kept unique.
361 * Property Lists:: Each symbol has a property list
362 for recording miscellaneous information.
363
364 Property Lists
365
366 * Plists and Alists:: Comparison of the advantages of property
367 lists and association lists.
368 * Symbol Plists:: Functions to access symbols' property lists.
369 * Other Plists:: Accessing property lists stored elsewhere.
370
371 Evaluation
372
373 * Intro Eval:: Evaluation in the scheme of things.
374 * Forms:: How various sorts of objects are evaluated.
375 * Quoting:: Avoiding evaluation (to put constants in
376 the program).
377 * Backquote:: Easier construction of list structure.
378 * Eval:: How to invoke the Lisp interpreter explicitly.
379
380 Kinds of Forms
381
382 * Self-Evaluating Forms:: Forms that evaluate to themselves.
383 * Symbol Forms:: Symbols evaluate as variables.
384 * Classifying Lists:: How to distinguish various sorts of list forms.
385 * Function Indirection:: When a symbol appears as the car of a list,
386 we find the real function via the symbol.
387 * Function Forms:: Forms that call functions.
388 * Macro Forms:: Forms that call macros.
389 * Special Forms:: "Special forms" are idiosyncratic primitives,
390 most of them extremely important.
391 * Autoloading:: Functions set up to load files
392 containing their real definitions.
393
394 Control Structures
395
396 * Sequencing:: Evaluation in textual order.
397 * Conditionals:: @code{if}, @code{cond}, @code{when}, @code{unless}.
398 * Combining Conditions:: @code{and}, @code{or}, @code{not}.
399 * Iteration:: @code{while} loops.
400 * Nonlocal Exits:: Jumping out of a sequence.
401
402 Nonlocal Exits
403
404 * Catch and Throw:: Nonlocal exits for the program's own purposes.
405 * Examples of Catch:: Showing how such nonlocal exits can be written.
406 * Errors:: How errors are signaled and handled.
407 * Cleanups:: Arranging to run a cleanup form if an
408 error happens.
409
410 Errors
411
412 * Signaling Errors:: How to report an error.
413 * Processing of Errors:: What Emacs does when you report an error.
414 * Handling Errors:: How you can trap errors and continue execution.
415 * Error Symbols:: How errors are classified for trapping them.
416
417 Variables
418
419 * Global Variables:: Variable values that exist permanently, everywhere.
420 * Constant Variables:: Certain "variables" have values that never change.
421 * Local Variables:: Variable values that exist only temporarily.
422 * Void Variables:: Symbols that lack values.
423 * Defining Variables:: A definition says a symbol is used as a variable.
424 * Tips for Defining:: Things you should think about when you
425 define a variable.
426 * Accessing Variables:: Examining values of variables whose names
427 are known only at run time.
428 * Setting Variables:: Storing new values in variables.
429 * Variable Scoping:: How Lisp chooses among local and global values.
430 * Buffer-Local Variables:: Variable values in effect only in one buffer.
431 * File Local Variables:: Handling local variable lists in files.
432 * Directory Local Variables:: Local variables common to all files in a
433 directory.
434 * Variable Aliases:: Variables that are aliases for other variables.
435 * Variables with Restricted Values:: Non-constant variables whose value can
436 @emph{not} be an arbitrary Lisp object.
437
438 Scoping Rules for Variable Bindings
439
440 * Dynamic Binding:: The default for binding local variables in Emacs.
441 * Dynamic Binding Tips:: Avoiding problems with dynamic binding.
442 * Lexical Binding:: A different type of local variable binding.
443 * Using Lexical Binding:: How to enable lexical binding.
444
445 Buffer-Local Variables
446
447 * Intro to Buffer-Local:: Introduction and concepts.
448 * Creating Buffer-Local:: Creating and destroying buffer-local bindings.
449 * Default Value:: The default value is seen in buffers
450 that don't have their own buffer-local values.
451
452 Functions
453
454 * What Is a Function:: Lisp functions vs. primitives; terminology.
455 * Lambda Expressions:: How functions are expressed as Lisp objects.
456 * Function Names:: A symbol can serve as the name of a function.
457 * Defining Functions:: Lisp expressions for defining functions.
458 * Calling Functions:: How to use an existing function.
459 * Mapping Functions:: Applying a function to each element of a list, etc.
460 * Anonymous Functions:: Lambda expressions are functions with no names.
461 * Function Cells:: Accessing or setting the function definition
462 of a symbol.
463 * Closures:: Functions that enclose a lexical environment.
464 * Obsolete Functions:: Declaring functions obsolete.
465 * Inline Functions:: Defining functions that the compiler
466 will expand inline.
467 * Declaring Functions:: Telling the compiler that a function is defined.
468 * Function Safety:: Determining whether a function is safe to call.
469 * Related Topics:: Cross-references to specific Lisp primitives
470 that have a special bearing on how
471 functions work.
472
473 Lambda Expressions
474
475 * Lambda Components:: The parts of a lambda expression.
476 * Simple Lambda:: A simple example.
477 * Argument List:: Details and special features of argument lists.
478 * Function Documentation:: How to put documentation in a function.
479
480 Macros
481
482 * Simple Macro:: A basic example.
483 * Expansion:: How, when and why macros are expanded.
484 * Compiling Macros:: How macros are expanded by the compiler.
485 * Defining Macros:: How to write a macro definition.
486 * Problems with Macros:: Don't evaluate the macro arguments too many times.
487 Don't hide the user's variables.
488 * Indenting Macros:: Specifying how to indent macro calls.
489
490 Common Problems Using Macros
491
492 * Wrong Time:: Do the work in the expansion, not in the macro.
493 * Argument Evaluation:: The expansion should evaluate each macro arg once.
494 * Surprising Local Vars:: Local variable bindings in the expansion
495 require special care.
496 * Eval During Expansion:: Don't evaluate them; put them in the expansion.
497 * Repeated Expansion:: Avoid depending on how many times expansion is done.
498
499 Customization Settings
500
501 * Common Keywords:: Common keyword arguments for all kinds of
502 customization declarations.
503 * Group Definitions:: Writing customization group definitions.
504 * Variable Definitions:: Declaring user options.
505 * Customization Types:: Specifying the type of a user option.
506 * Applying Customizations:: Functions to apply customization settings.
507 * Custom Themes:: Writing Custom themes.
508
509 Customization Types
510
511 * Simple Types:: Simple customization types: sexp, integer, etc.
512 * Composite Types:: Build new types from other types or data.
513 * Splicing into Lists:: Splice elements into list with @code{:inline}.
514 * Type Keywords:: Keyword-argument pairs in a customization type.
515 * Defining New Types:: Give your type a name.
516
517 Loading
518
519 * How Programs Do Loading:: The @code{load} function and others.
520 * Load Suffixes:: Details about the suffixes that @code{load} tries.
521 * Library Search:: Finding a library to load.
522 * Loading Non-ASCII:: Non-@acronym{ASCII} characters in Emacs Lisp files.
523 * Autoload:: Setting up a function to autoload.
524 * Repeated Loading:: Precautions about loading a file twice.
525 * Named Features:: Loading a library if it isn't already loaded.
526 * Where Defined:: Finding which file defined a certain symbol.
527 * Unloading:: How to "unload" a library that was loaded.
528 * Hooks for Loading:: Providing code to be run when
529 particular libraries are loaded.
530
531 Byte Compilation
532
533 * Speed of Byte-Code:: An example of speedup from byte compilation.
534 * Compilation Functions:: Byte compilation functions.
535 * Docs and Compilation:: Dynamic loading of documentation strings.
536 * Dynamic Loading:: Dynamic loading of individual functions.
537 * Eval During Compile:: Code to be evaluated when you compile.
538 * Compiler Errors:: Handling compiler error messages.
539 * Byte-Code Objects:: The data type used for byte-compiled functions.
540 * Disassembly:: Disassembling byte-code; how to read byte-code.
541
542 Advising Emacs Lisp Functions
543
544 * Simple Advice:: A simple example to explain the basics of advice.
545 * Defining Advice:: Detailed description of @code{defadvice}.
546 * Around-Advice:: Wrapping advice around a function's definition.
547 * Computed Advice:: ...is to @code{defadvice} as @code{fset} is to @code{defun}.
548 * Activation of Advice:: Advice doesn't do anything until you activate it.
549 * Enabling Advice:: You can enable or disable each piece of advice.
550 * Preactivation:: Preactivation is a way of speeding up the
551 loading of compiled advice.
552 * Argument Access in Advice:: How advice can access the function's arguments.
553 * Combined Definition:: How advice is implemented.
554
555 Debugging Lisp Programs
556
557 * Debugger:: A debugger for the Emacs Lisp evaluator.
558 * Edebug:: A source-level Emacs Lisp debugger.
559 * Syntax Errors:: How to find syntax errors.
560 * Test Coverage:: Ensuring you have tested all branches in your code.
561
562 The Lisp Debugger
563
564 * Error Debugging:: Entering the debugger when an error happens.
565 * Infinite Loops:: Stopping and debugging a program that doesn't exit.
566 * Function Debugging:: Entering it when a certain function is called.
567 * Explicit Debug:: Entering it at a certain point in the program.
568 * Using Debugger:: What the debugger does; what you see while in it.
569 * Debugger Commands:: Commands used while in the debugger.
570 * Invoking the Debugger:: How to call the function @code{debug}.
571 * Internals of Debugger:: Subroutines of the debugger, and global variables.
572
573 Edebug
574
575 * Using Edebug:: Introduction to use of Edebug.
576 * Instrumenting:: You must instrument your code
577 in order to debug it with Edebug.
578 * Edebug Execution Modes:: Execution modes, stopping more or less often.
579 * Jumping:: Commands to jump to a specified place.
580 * Edebug Misc:: Miscellaneous commands.
581 * Breaks:: Setting breakpoints to make the program stop.
582 * Trapping Errors:: Trapping errors with Edebug.
583 * Edebug Views:: Views inside and outside of Edebug.
584 * Edebug Eval:: Evaluating expressions within Edebug.
585 * Eval List:: Expressions whose values are displayed
586 each time you enter Edebug.
587 * Printing in Edebug:: Customization of printing.
588 * Trace Buffer:: How to produce trace output in a buffer.
589 * Coverage Testing:: How to test evaluation coverage.
590 * The Outside Context:: Data that Edebug saves and restores.
591 * Edebug and Macros:: Specifying how to handle macro calls.
592 * Edebug Options:: Option variables for customizing Edebug.
593
594 Breaks
595
596 * Breakpoints:: Breakpoints at stop points.
597 * Global Break Condition:: Breaking on an event.
598 * Source Breakpoints:: Embedding breakpoints in source code.
599
600 The Outside Context
601
602 * Checking Whether to Stop::When Edebug decides what to do.
603 * Edebug Display Update:: When Edebug updates the display.
604 * Edebug Recursive Edit:: When Edebug stops execution.
605
606 Edebug and Macros
607
608 * Instrumenting Macro Calls::The basic problem.
609 * Specification List:: How to specify complex patterns of evaluation.
610 * Backtracking:: What Edebug does when matching fails.
611 * Specification Examples:: To help understand specifications.
612
613 Debugging Invalid Lisp Syntax
614
615 * Excess Open:: How to find a spurious open paren or missing close.
616 * Excess Close:: How to find a spurious close paren or missing open.
617
618 Reading and Printing Lisp Objects
619
620 * Streams Intro:: Overview of streams, reading and printing.
621 * Input Streams:: Various data types that can be used as
622 input streams.
623 * Input Functions:: Functions to read Lisp objects from text.
624 * Output Streams:: Various data types that can be used as
625 output streams.
626 * Output Functions:: Functions to print Lisp objects as text.
627 * Output Variables:: Variables that control what the printing
628 functions do.
629
630 Minibuffers
631
632 * Intro to Minibuffers:: Basic information about minibuffers.
633 * Text from Minibuffer:: How to read a straight text string.
634 * Object from Minibuffer:: How to read a Lisp object or expression.
635 * Minibuffer History:: Recording previous minibuffer inputs
636 so the user can reuse them.
637 * Initial Input:: Specifying initial contents for the minibuffer.
638 * Completion:: How to invoke and customize completion.
639 * Yes-or-No Queries:: Asking a question with a simple answer.
640 * Multiple Queries:: Asking a series of similar questions.
641 * Reading a Password:: Reading a password from the terminal.
642 * Minibuffer Commands:: Commands used as key bindings in minibuffers.
643 * Minibuffer Windows:: Operating on the special minibuffer windows.
644 * Minibuffer Contents:: How such commands access the minibuffer text.
645 * Recursive Mini:: Whether recursive entry to minibuffer is allowed.
646 * Minibuffer Misc:: Various customization hooks and variables.
647
648 Completion
649
650 * Basic Completion:: Low-level functions for completing strings.
651 * Minibuffer Completion:: Invoking the minibuffer with completion.
652 * Completion Commands:: Minibuffer commands that do completion.
653 * High-Level Completion:: Convenient special cases of completion
654 (reading buffer names, variable names, etc.).
655 * Reading File Names:: Using completion to read file names and
656 shell commands.
657 * Completion Variables:: Variables controlling completion behavior.
658 * Programmed Completion:: Writing your own completion function.
659 * Completion in Buffers:: Completing text in ordinary buffers.
660
661 Command Loop
662
663 * Command Overview:: How the command loop reads commands.
664 * Defining Commands:: Specifying how a function should read arguments.
665 * Interactive Call:: Calling a command, so that it will read arguments.
666 * Distinguish Interactive:: Making a command distinguish interactive calls.
667 * Command Loop Info:: Variables set by the command loop for you to examine.
668 * Adjusting Point:: Adjustment of point after a command.
669 * Input Events:: What input looks like when you read it.
670 * Reading Input:: How to read input events from the keyboard or mouse.
671 * Special Events:: Events processed immediately and individually.
672 * Waiting:: Waiting for user input or elapsed time.
673 * Quitting:: How @kbd{C-g} works. How to catch or defer quitting.
674 * Prefix Command Arguments:: How the commands to set prefix args work.
675 * Recursive Editing:: Entering a recursive edit,
676 and why you usually shouldn't.
677 * Disabling Commands:: How the command loop handles disabled commands.
678 * Command History:: How the command history is set up, and how accessed.
679 * Keyboard Macros:: How keyboard macros are implemented.
680
681 Defining Commands
682
683 * Using Interactive:: General rules for @code{interactive}.
684 * Interactive Codes:: The standard letter-codes for reading arguments
685 in various ways.
686 * Interactive Examples:: Examples of how to read interactive arguments.
687
688 Input Events
689
690 * Keyboard Events:: Ordinary characters--keys with symbols on them.
691 * Function Keys:: Function keys--keys with names, not symbols.
692 * Mouse Events:: Overview of mouse events.
693 * Click Events:: Pushing and releasing a mouse button.
694 * Drag Events:: Moving the mouse before releasing the button.
695 * Button-Down Events:: A button was pushed and not yet released.
696 * Repeat Events:: Double and triple click (or drag, or down).
697 * Motion Events:: Just moving the mouse, not pushing a button.
698 * Focus Events:: Moving the mouse between frames.
699 * Misc Events:: Other events the system can generate.
700 * Event Examples:: Examples of the lists for mouse events.
701 * Classifying Events:: Finding the modifier keys in an event symbol.
702 Event types.
703 * Accessing Mouse:: Functions to extract info from mouse events.
704 * Accessing Scroll:: Functions to get info from scroll bar events.
705 * Strings of Events:: Special considerations for putting
706 keyboard character events in a string.
707
708 Reading Input
709
710 * Key Sequence Input:: How to read one key sequence.
711 * Reading One Event:: How to read just one event.
712 * Event Mod:: How Emacs modifies events as they are read.
713 * Invoking the Input Method:: How reading an event uses the input method.
714 * Quoted Character Input:: Asking the user to specify a character.
715 * Event Input Misc:: How to reread or throw away input events.
716
717 Keymaps
718
719 * Key Sequences:: Key sequences as Lisp objects.
720 * Keymap Basics:: Basic concepts of keymaps.
721 * Format of Keymaps:: What a keymap looks like as a Lisp object.
722 * Creating Keymaps:: Functions to create and copy keymaps.
723 * Inheritance and Keymaps:: How one keymap can inherit the bindings
724 of another keymap.
725 * Prefix Keys:: Defining a key with a keymap as its definition.
726 * Active Keymaps:: How Emacs searches the active keymaps
727 for a key binding.
728 * Searching Keymaps:: A pseudo-Lisp summary of searching active maps.
729 * Controlling Active Maps:: Each buffer has a local keymap
730 to override the standard (global) bindings.
731 A minor mode can also override them.
732 * Key Lookup:: Finding a key's binding in one keymap.
733 * Functions for Key Lookup:: How to request key lookup.
734 * Changing Key Bindings:: Redefining a key in a keymap.
735 * Remapping Commands:: A keymap can translate one command to another.
736 * Translation Keymaps:: Keymaps for translating sequences of events.
737 * Key Binding Commands:: Interactive interfaces for redefining keys.
738 * Scanning Keymaps:: Looking through all keymaps, for printing help.
739 * Menu Keymaps:: Defining a menu as a keymap.
740
741 Menu Keymaps
742
743 * Defining Menus:: How to make a keymap that defines a menu.
744 * Mouse Menus:: How users actuate the menu with the mouse.
745 * Keyboard Menus:: How users actuate the menu with the keyboard.
746 * Menu Example:: Making a simple menu.
747 * Menu Bar:: How to customize the menu bar.
748 * Tool Bar:: A tool bar is a row of images.
749 * Modifying Menus:: How to add new items to a menu.
750
751 Defining Menus
752
753 * Simple Menu Items:: A simple kind of menu key binding,
754 limited in capabilities.
755 * Extended Menu Items:: More powerful menu item definitions
756 let you specify keywords to enable
757 various features.
758 * Menu Separators:: Drawing a horizontal line through a menu.
759 * Alias Menu Items:: Using command aliases in menu items.
760 * Toolkit Differences:: Not all toolkits provide the same features.
761
762 Major and Minor Modes
763
764 * Hooks:: How to use hooks; how to write code that provides hooks.
765 * Major Modes:: Defining major modes.
766 * Minor Modes:: Defining minor modes.
767 * Mode Line Format:: Customizing the text that appears in the mode line.
768 * Imenu:: Providing a menu of definitions made in a buffer.
769 * Font Lock Mode:: How modes can highlight text according to syntax.
770 * Auto-Indentation:: How to teach Emacs to indent for a major mode.
771 * Desktop Save Mode:: How modes can have buffer state saved between
772 Emacs sessions.
773
774 Hooks
775
776 * Running Hooks:: How to run a hook.
777 * Setting Hooks:: How to put functions on a hook, or remove them.
778
779 Major Modes
780
781 * Major Mode Conventions:: Coding conventions for keymaps, etc.
782 * Auto Major Mode:: How Emacs chooses the major mode automatically.
783 * Mode Help:: Finding out how to use a mode.
784 * Derived Modes:: Defining a new major mode based on another major
785 mode.
786 * Basic Major Modes:: Modes that other modes are often derived from.
787 * Mode Hooks:: Hooks run at the end of major mode functions.
788 * Tabulated List Mode:: Parent mode for buffers containing tabulated data.
789 * Generic Modes:: Defining a simple major mode that supports
790 comment syntax and Font Lock mode.
791 * Example Major Modes:: Text mode and Lisp modes.
792
793 Minor Modes
794
795 * Minor Mode Conventions:: Tips for writing a minor mode.
796 * Keymaps and Minor Modes:: How a minor mode can have its own keymap.
797 * Defining Minor Modes:: A convenient facility for defining minor modes.
798
799 Mode Line Format
800
801 * Mode Line Basics:: Basic ideas of mode line control.
802 * Mode Line Data:: The data structure that controls the mode line.
803 * Mode Line Top:: The top level variable, mode-line-format.
804 * Mode Line Variables:: Variables used in that data structure.
805 * %-Constructs:: Putting information into a mode line.
806 * Properties in Mode:: Using text properties in the mode line.
807 * Header Lines:: Like a mode line, but at the top.
808 * Emulating Mode Line:: Formatting text as the mode line would.
809
810 Font Lock Mode
811
812 * Font Lock Basics:: Overview of customizing Font Lock.
813 * Search-based Fontification:: Fontification based on regexps.
814 * Customizing Keywords:: Customizing search-based fontification.
815 * Other Font Lock Variables:: Additional customization facilities.
816 * Levels of Font Lock:: Each mode can define alternative levels
817 so that the user can select more or less.
818 * Precalculated Fontification:: How Lisp programs that produce the buffer
819 contents can also specify how to fontify it.
820 * Faces for Font Lock:: Special faces specifically for Font Lock.
821 * Syntactic Font Lock:: Fontification based on syntax tables.
822 * Multiline Font Lock:: How to coerce Font Lock into properly
823 highlighting multiline constructs.
824
825 Multiline Font Lock Constructs
826
827 * Font Lock Multiline:: Marking multiline chunks with a text property.
828 * Region to Refontify:: Controlling which region gets refontified
829 after a buffer change.
830
831 Automatic Indentation of code
832
833 * SMIE:: A simple minded indentation engine.
834
835 Simple Minded Indentation Engine
836
837 * SMIE setup:: SMIE setup and features.
838 * Operator Precedence Grammars:: A very simple parsing technique.
839 * SMIE Grammar:: Defining the grammar of a language.
840 * SMIE Lexer:: Defining tokens.
841 * SMIE Tricks:: Working around the parser's limitations.
842 * SMIE Indentation:: Specifying indentation rules.
843 * SMIE Indentation Helpers:: Helper functions for indentation rules.
844 * SMIE Indentation Example:: Sample indentation rules.
845
846 Documentation
847
848 * Documentation Basics:: Where doc strings are defined and stored.
849 * Accessing Documentation:: How Lisp programs can access doc strings.
850 * Keys in Documentation:: Substituting current key bindings.
851 * Describing Characters:: Making printable descriptions of
852 non-printing characters and key sequences.
853 * Help Functions:: Subroutines used by Emacs help facilities.
854
855 Files
856
857 * Visiting Files:: Reading files into Emacs buffers for editing.
858 * Saving Buffers:: Writing changed buffers back into files.
859 * Reading from Files:: Reading files into buffers without visiting.
860 * Writing to Files:: Writing new files from parts of buffers.
861 * File Locks:: Locking and unlocking files, to prevent
862 simultaneous editing by two people.
863 * Information about Files:: Testing existence, accessibility, size of files.
864 * Changing Files:: Renaming files, changing permissions, etc.
865 * File Names:: Decomposing and expanding file names.
866 * Contents of Directories:: Getting a list of the files in a directory.
867 * Create/Delete Dirs:: Creating and Deleting Directories.
868 * Magic File Names:: Special handling for certain file names.
869 * Format Conversion:: Conversion to and from various file formats.
870
871 Visiting Files
872
873 * Visiting Functions:: The usual interface functions for visiting.
874 * Subroutines of Visiting:: Lower-level subroutines that they use.
875
876 Information about Files
877
878 * Testing Accessibility:: Is a given file readable? Writable?
879 * Kinds of Files:: Is it a directory? A symbolic link?
880 * Truenames:: Eliminating symbolic links from a file name.
881 * File Attributes:: How large is it? Any other names? Etc.
882 * Locating Files:: How to find a file in standard places.
883
884 File Names
885
886 * File Name Components:: The directory part of a file name, and the rest.
887 * Relative File Names:: Some file names are relative to a current directory.
888 * Directory Names:: A directory's name as a directory
889 is different from its name as a file.
890 * File Name Expansion:: Converting relative file names to absolute ones.
891 * Unique File Names:: Generating names for temporary files.
892 * File Name Completion:: Finding the completions for a given file name.
893 * Standard File Names:: If your package uses a fixed file name,
894 how to handle various operating systems simply.
895
896 File Format Conversion
897
898 * Format Conversion Overview:: @code{insert-file-contents} and @code{write-region}.
899 * Format Conversion Round-Trip:: Using @code{format-alist}.
900 * Format Conversion Piecemeal:: Specifying non-paired conversion.
901
902 Backups and Auto-Saving
903
904 * Backup Files:: How backup files are made; how their names
905 are chosen.
906 * Auto-Saving:: How auto-save files are made; how their
907 names are chosen.
908 * Reverting:: @code{revert-buffer}, and how to customize
909 what it does.
910
911 Backup Files
912
913 * Making Backups:: How Emacs makes backup files, and when.
914 * Rename or Copy:: Two alternatives: renaming the old file
915 or copying it.
916 * Numbered Backups:: Keeping multiple backups for each source file.
917 * Backup Names:: How backup file names are computed; customization.
918
919 Buffers
920
921 * Buffer Basics:: What is a buffer?
922 * Current Buffer:: Designating a buffer as current
923 so that primitives will access its contents.
924 * Buffer Names:: Accessing and changing buffer names.
925 * Buffer File Name:: The buffer file name indicates which file
926 is visited.
927 * Buffer Modification:: A buffer is @dfn{modified} if it needs to be saved.
928 * Modification Time:: Determining whether the visited file was changed
929 "behind Emacs's back".
930 * Read Only Buffers:: Modifying text is not allowed in a
931 read-only buffer.
932 * The Buffer List:: How to look at all the existing buffers.
933 * Creating Buffers:: Functions that create buffers.
934 * Killing Buffers:: Buffers exist until explicitly killed.
935 * Indirect Buffers:: An indirect buffer shares text with some
936 other buffer.
937 * Swapping Text:: Swapping text between two buffers.
938 * Buffer Gap:: The gap in the buffer.
939
940 Windows
941
942 * Basic Windows:: Basic information on using windows.
943 * Windows and Frames:: Relating windows to the frame they appear on.
944 * Window Sizes:: Accessing a window's size.
945 * Resizing Windows:: Changing the sizes of windows.
946 * Splitting Windows:: Splitting one window into two windows.
947 * Deleting Windows:: Deleting a window gives its space to other windows.
948 * Selecting Windows:: The selected window is the one that you edit in.
949 * Cyclic Window Ordering:: Moving around the existing windows.
950 * Buffers and Windows:: Each window displays the contents of a buffer.
951 * Switching Buffers:: Higher-level functions for switching to a buffer.
952 * Choosing Window:: How to choose a window for displaying a buffer.
953 * Display Action Functions:: Subroutines for @code{display-buffer}.
954 * Choosing Window Options:: Extra options affecting how buffers are displayed.
955 * Window History:: Each window remembers the buffers displayed in it.
956 * Dedicated Windows:: How to avoid displaying another buffer in
957 a specific window.
958 * Quitting Windows:: How to restore the state prior to displaying a
959 buffer.
960 * Window Point:: Each window has its own location of point.
961 * Window Start and End:: Buffer positions indicating which text is
962 on-screen in a window.
963 * Textual Scrolling:: Moving text up and down through the window.
964 * Vertical Scrolling:: Moving the contents up and down on the window.
965 * Horizontal Scrolling:: Moving the contents sideways on the window.
966 * Coordinates and Windows:: Converting coordinates to windows.
967 * Window Configurations:: Saving and restoring the state of the screen.
968 * Window Parameters:: Associating additional information with windows.
969 * Window Hooks:: Hooks for scrolling, window size changes,
970 redisplay going past a certain point,
971 or window configuration changes.
972
973 Frames
974
975 * Creating Frames:: Creating additional frames.
976 * Multiple Terminals:: Displaying on several different devices.
977 * Frame Parameters:: Controlling frame size, position, font, etc.
978 * Terminal Parameters:: Parameters common for all frames on terminal.
979 * Frame Titles:: Automatic updating of frame titles.
980 * Deleting Frames:: Frames last until explicitly deleted.
981 * Finding All Frames:: How to examine all existing frames.
982 * Minibuffers and Frames:: How a frame finds the minibuffer to use.
983 * Input Focus:: Specifying the selected frame.
984 * Visibility of Frames:: Frames may be visible or invisible, or icons.
985 * Raising and Lowering:: Raising a frame makes it hide other windows;
986 lowering it makes the others hide it.
987 * Frame Configurations:: Saving the state of all frames.
988 * Mouse Tracking:: Getting events that say when the mouse moves.
989 * Mouse Position:: Asking where the mouse is, or moving it.
990 * Pop-Up Menus:: Displaying a menu for the user to select from.
991 * Dialog Boxes:: Displaying a box to ask yes or no.
992 * Pointer Shape:: Specifying the shape of the mouse pointer.
993 * Window System Selections::Transferring text to and from other X clients.
994 * Drag and Drop:: Internals of Drag-and-Drop implementation.
995 * Color Names:: Getting the definitions of color names.
996 * Text Terminal Colors:: Defining colors for text terminals.
997 * Resources:: Getting resource values from the server.
998 * Display Feature Testing:: Determining the features of a terminal.
999
1000 Frame Parameters
1001
1002 * Parameter Access:: How to change a frame's parameters.
1003 * Initial Parameters:: Specifying frame parameters when you make a frame.
1004 * Window Frame Parameters:: List of frame parameters for window systems.
1005 * Size and Position:: Changing the size and position of a frame.
1006 * Geometry:: Parsing geometry specifications.
1007
1008 Window Frame Parameters
1009
1010 * Basic Parameters:: Parameters that are fundamental.
1011 * Position Parameters:: The position of the frame on the screen.
1012 * Size Parameters:: Frame's size.
1013 * Layout Parameters:: Size of parts of the frame, and
1014 enabling or disabling some parts.
1015 * Buffer Parameters:: Which buffers have been or should be shown.
1016 * Management Parameters:: Communicating with the window manager.
1017 * Cursor Parameters:: Controlling the cursor appearance.
1018 * Font and Color Parameters:: Fonts and colors for the frame text.
1019
1020 Positions
1021
1022 * Point:: The special position where editing takes place.
1023 * Motion:: Changing point.
1024 * Excursions:: Temporary motion and buffer changes.
1025 * Narrowing:: Restricting editing to a portion of the buffer.
1026
1027 Motion
1028
1029 * Character Motion:: Moving in terms of characters.
1030 * Word Motion:: Moving in terms of words.
1031 * Buffer End Motion:: Moving to the beginning or end of the buffer.
1032 * Text Lines:: Moving in terms of lines of text.
1033 * Screen Lines:: Moving in terms of lines as displayed.
1034 * List Motion:: Moving by parsing lists and sexps.
1035 * Skipping Characters:: Skipping characters belonging to a certain set.
1036
1037 Markers
1038
1039 * Overview of Markers:: The components of a marker, and how it relocates.
1040 * Predicates on Markers:: Testing whether an object is a marker.
1041 * Creating Markers:: Making empty markers or markers at certain places.
1042 * Information from Markers::Finding the marker's buffer or character position.
1043 * Marker Insertion Types:: Two ways a marker can relocate when you
1044 insert where it points.
1045 * Moving Markers:: Moving the marker to a new buffer or position.
1046 * The Mark:: How "the mark" is implemented with a marker.
1047 * The Region:: How to access "the region".
1048
1049 Text
1050
1051 * Near Point:: Examining text in the vicinity of point.
1052 * Buffer Contents:: Examining text in a general fashion.
1053 * Comparing Text:: Comparing substrings of buffers.
1054 * Insertion:: Adding new text to a buffer.
1055 * Commands for Insertion:: User-level commands to insert text.
1056 * Deletion:: Removing text from a buffer.
1057 * User-Level Deletion:: User-level commands to delete text.
1058 * The Kill Ring:: Where removed text sometimes is saved for
1059 later use.
1060 * Undo:: Undoing changes to the text of a buffer.
1061 * Maintaining Undo:: How to enable and disable undo information.
1062 How to control how much information is kept.
1063 * Filling:: Functions for explicit filling.
1064 * Margins:: How to specify margins for filling commands.
1065 * Adaptive Fill:: Adaptive Fill mode chooses a fill prefix
1066 from context.
1067 * Auto Filling:: How auto-fill mode is implemented to break lines.
1068 * Sorting:: Functions for sorting parts of the buffer.
1069 * Columns:: Computing horizontal positions, and using them.
1070 * Indentation:: Functions to insert or adjust indentation.
1071 * Case Changes:: Case conversion of parts of the buffer.
1072 * Text Properties:: Assigning Lisp property lists to text characters.
1073 * Substitution:: Replacing a given character wherever it appears.
1074 * Transposition:: Swapping two portions of a buffer.
1075 * Registers:: How registers are implemented. Accessing
1076 the text or position stored in a register.
1077 * Base 64:: Conversion to or from base 64 encoding.
1078 * Checksum/Hash:: Computing cryptographic hashes.
1079 * Parsing HTML/XML:: Parsing HTML and XML.
1080 * Atomic Changes:: Installing several buffer changes "atomically".
1081 * Change Hooks:: Supplying functions to be run when text is changed.
1082
1083 The Kill Ring
1084
1085 * Kill Ring Concepts:: What text looks like in the kill ring.
1086 * Kill Functions:: Functions that kill text.
1087 * Yanking:: How yanking is done.
1088 * Yank Commands:: Commands that access the kill ring.
1089 * Low-Level Kill Ring:: Functions and variables for kill ring access.
1090 * Internals of Kill Ring:: Variables that hold kill ring data.
1091
1092 Indentation
1093
1094 * Primitive Indent:: Functions used to count and insert indentation.
1095 * Mode-Specific Indent:: Customize indentation for different modes.
1096 * Region Indent:: Indent all the lines in a region.
1097 * Relative Indent:: Indent the current line based on previous lines.
1098 * Indent Tabs:: Adjustable, typewriter-like tab stops.
1099 * Motion by Indent:: Move to first non-blank character.
1100
1101 Text Properties
1102
1103 * Examining Properties:: Looking at the properties of one character.
1104 * Changing Properties:: Setting the properties of a range of text.
1105 * Property Search:: Searching for where a property changes value.
1106 * Special Properties:: Particular properties with special meanings.
1107 * Format Properties:: Properties for representing formatting of text.
1108 * Sticky Properties:: How inserted text gets properties from
1109 neighboring text.
1110 * Lazy Properties:: Computing text properties in a lazy fashion
1111 only when text is examined.
1112 * Clickable Text:: Using text properties to make regions of text
1113 do something when you click on them.
1114 * Fields:: The @code{field} property defines
1115 fields within the buffer.
1116 * Not Intervals:: Why text properties do not use
1117 Lisp-visible text intervals.
1118
1119 Non-@acronym{ASCII} Characters
1120
1121 * Text Representations:: How Emacs represents text.
1122 * Converting Representations:: Converting unibyte to multibyte and vice versa.
1123 * Selecting a Representation:: Treating a byte sequence as unibyte or multi.
1124 * Character Codes:: How unibyte and multibyte relate to
1125 codes of individual characters.
1126 * Character Properties:: Character attributes that define their
1127 behavior and handling.
1128 * Character Sets:: The space of possible character codes
1129 is divided into various character sets.
1130 * Scanning Charsets:: Which character sets are used in a buffer?
1131 * Translation of Characters:: Translation tables are used for conversion.
1132 * Coding Systems:: Coding systems are conversions for saving files.
1133 * Input Methods:: Input methods allow users to enter various
1134 non-ASCII characters without special keyboards.
1135 * Locales:: Interacting with the POSIX locale.
1136
1137 Coding Systems
1138
1139 * Coding System Basics:: Basic concepts.
1140 * Encoding and I/O:: How file I/O functions handle coding systems.
1141 * Lisp and Coding Systems:: Functions to operate on coding system names.
1142 * User-Chosen Coding Systems:: Asking the user to choose a coding system.
1143 * Default Coding Systems:: Controlling the default choices.
1144 * Specifying Coding Systems:: Requesting a particular coding system
1145 for a single file operation.
1146 * Explicit Encoding:: Encoding or decoding text without doing I/O.
1147 * Terminal I/O Encoding:: Use of encoding for terminal I/O.
1148 * MS-DOS File Types:: How DOS "text" and "binary" files
1149 relate to coding systems.
1150
1151 Searching and Matching
1152
1153 * String Search:: Search for an exact match.
1154 * Searching and Case:: Case-independent or case-significant searching.
1155 * Regular Expressions:: Describing classes of strings.
1156 * Regexp Search:: Searching for a match for a regexp.
1157 * POSIX Regexps:: Searching POSIX-style for the longest match.
1158 * Match Data:: Finding out which part of the text matched,
1159 after a string or regexp search.
1160 * Search and Replace:: Commands that loop, searching and replacing.
1161 * Standard Regexps:: Useful regexps for finding sentences, pages,...
1162
1163 Regular Expressions
1164
1165 * Syntax of Regexps:: Rules for writing regular expressions.
1166 * Regexp Example:: Illustrates regular expression syntax.
1167 * Regexp Functions:: Functions for operating on regular expressions.
1168
1169 Syntax of Regular Expressions
1170
1171 * Regexp Special:: Special characters in regular expressions.
1172 * Char Classes:: Character classes used in regular expressions.
1173 * Regexp Backslash:: Backslash-sequences in regular expressions.
1174
1175 The Match Data
1176
1177 * Replacing Match:: Replacing a substring that was matched.
1178 * Simple Match Data:: Accessing single items of match data,
1179 such as where a particular subexpression started.
1180 * Entire Match Data:: Accessing the entire match data at once, as a list.
1181 * Saving Match Data:: Saving and restoring the match data.
1182
1183 Syntax Tables
1184
1185 * Syntax Basics:: Basic concepts of syntax tables.
1186 * Syntax Descriptors:: How characters are classified.
1187 * Syntax Table Functions:: How to create, examine and alter syntax tables.
1188 * Syntax Properties:: Overriding syntax with text properties.
1189 * Motion and Syntax:: Moving over characters with certain syntaxes.
1190 * Parsing Expressions:: Parsing balanced expressions
1191 using the syntax table.
1192 * Standard Syntax Tables:: Syntax tables used by various major modes.
1193 * Syntax Table Internals:: How syntax table information is stored.
1194 * Categories:: Another way of classifying character syntax.
1195
1196 Syntax Descriptors
1197
1198 * Syntax Class Table:: Table of syntax classes.
1199 * Syntax Flags:: Additional flags each character can have.
1200
1201 Parsing Expressions
1202
1203 * Motion via Parsing:: Motion functions that work by parsing.
1204 * Position Parse:: Determining the syntactic state of a position.
1205 * Parser State:: How Emacs represents a syntactic state.
1206 * Low-Level Parsing:: Parsing across a specified region.
1207 * Control Parsing:: Parameters that affect parsing.
1208
1209 Abbrevs and Abbrev Expansion
1210
1211 * Abbrev Tables:: Creating and working with abbrev tables.
1212 * Defining Abbrevs:: Specifying abbreviations and their expansions.
1213 * Abbrev Files:: Saving abbrevs in files.
1214 * Abbrev Expansion:: Controlling expansion; expansion subroutines.
1215 * Standard Abbrev Tables:: Abbrev tables used by various major modes.
1216 * Abbrev Properties:: How to read and set abbrev properties.
1217 Which properties have which effect.
1218 * Abbrev Table Properties:: How to read and set abbrev table properties.
1219 Which properties have which effect.
1220
1221 Processes
1222
1223 * Subprocess Creation:: Functions that start subprocesses.
1224 * Shell Arguments:: Quoting an argument to pass it to a shell.
1225 * Synchronous Processes:: Details of using synchronous subprocesses.
1226 * Asynchronous Processes:: Starting up an asynchronous subprocess.
1227 * Deleting Processes:: Eliminating an asynchronous subprocess.
1228 * Process Information:: Accessing run-status and other attributes.
1229 * Input to Processes:: Sending input to an asynchronous subprocess.
1230 * Signals to Processes:: Stopping, continuing or interrupting
1231 an asynchronous subprocess.
1232 * Output from Processes:: Collecting output from an asynchronous subprocess.
1233 * Sentinels:: Sentinels run when process run-status changes.
1234 * Query Before Exit:: Whether to query if exiting will kill a process.
1235 * System Processes:: Accessing other processes running on your system.
1236 * Transaction Queues:: Transaction-based communication with subprocesses.
1237 * Network:: Opening network connections.
1238 * Network Servers:: Network servers let Emacs accept net connections.
1239 * Datagrams:: UDP network connections.
1240 * Low-Level Network:: Lower-level but more general function
1241 to create connections and servers.
1242 * Misc Network:: Additional relevant functions for net connections.
1243 * Serial Ports:: Communicating with serial ports.
1244 * Byte Packing:: Using bindat to pack and unpack binary data.
1245
1246 Receiving Output from Processes
1247
1248 * Process Buffers:: If no filter, output is put in a buffer.
1249 * Filter Functions:: Filter functions accept output from the process.
1250 * Decoding Output:: Filters can get unibyte or multibyte strings.
1251 * Accepting Output:: How to wait until process output arrives.
1252
1253 Low-Level Network Access
1254
1255 * Network Processes:: Using @code{make-network-process}.
1256 * Network Options:: Further control over network connections.
1257 * Network Feature Testing:: Determining which network features work on
1258 the machine you are using.
1259
1260 Packing and Unpacking Byte Arrays
1261
1262 * Bindat Spec:: Describing data layout.
1263 * Bindat Functions:: Doing the unpacking and packing.
1264 * Bindat Examples:: Samples of what bindat.el can do for you!
1265
1266 Emacs Display
1267
1268 * Refresh Screen:: Clearing the screen and redrawing everything on it.
1269 * Forcing Redisplay:: Forcing redisplay.
1270 * Truncation:: Folding or wrapping long text lines.
1271 * The Echo Area:: Displaying messages at the bottom of the screen.
1272 * Warnings:: Displaying warning messages for the user.
1273 * Invisible Text:: Hiding part of the buffer text.
1274 * Selective Display:: Hiding part of the buffer text (the old way).
1275 * Temporary Displays:: Displays that go away automatically.
1276 * Overlays:: Use overlays to highlight parts of the buffer.
1277 * Width:: How wide a character or string is on the screen.
1278 * Line Height:: Controlling the height of lines.
1279 * Faces:: A face defines a graphics style
1280 for text characters: font, colors, etc.
1281 * Fringes:: Controlling window fringes.
1282 * Scroll Bars:: Controlling vertical scroll bars.
1283 * Display Property:: Enabling special display features.
1284 * Images:: Displaying images in Emacs buffers.
1285 * Buttons:: Adding clickable buttons to Emacs buffers.
1286 * Abstract Display:: Emacs's Widget for Object Collections.
1287 * Blinking:: How Emacs shows the matching open parenthesis.
1288 * Character Display:: How Emacs displays individual characters.
1289 * Beeping:: Audible signal to the user.
1290 * Window Systems:: Which window system is being used.
1291 * Bidirectional Display:: Display of bidirectional scripts, such as
1292 Arabic and Farsi.
1293
1294 The Echo Area
1295
1296 * Displaying Messages:: Explicitly displaying text in the echo area.
1297 * Progress:: Informing user about progress of a long operation.
1298 * Logging Messages:: Echo area messages are logged for the user.
1299 * Echo Area Customization:: Controlling the echo area.
1300
1301 Reporting Warnings
1302
1303 * Warning Basics:: Warnings concepts and functions to report them.
1304 * Warning Variables:: Variables programs bind to customize
1305 their warnings.
1306 * Warning Options:: Variables users set to control display of warnings.
1307 * Delayed Warnings:: Deferring a warning until the end of a command.
1308
1309 Overlays
1310
1311 * Managing Overlays:: Creating and moving overlays.
1312 * Overlay Properties:: How to read and set properties.
1313 What properties do to the screen display.
1314 * Finding Overlays:: Searching for overlays.
1315
1316 Faces
1317
1318 * Defining Faces:: How to define a face.
1319 * Face Attributes:: What is in a face?
1320 * Attribute Functions:: Functions to examine and set face attributes.
1321 * Displaying Faces:: How Emacs combines the faces specified for
1322 a character.
1323 * Face Remapping:: Remapping faces to alternative definitions.
1324 * Face Functions:: How to define and examine faces.
1325 * Auto Faces:: Hook for automatic face assignment.
1326 * Basic Faces:: Faces that are defined by default.
1327 * Font Selection:: Finding the best available font for a face.
1328 * Font Lookup:: Looking up the names of available fonts
1329 and information about them.
1330 * Fontsets:: A fontset is a collection of fonts
1331 that handle a range of character sets.
1332 * Low-Level Font:: Lisp representation for character display fonts.
1333
1334 Fringes
1335
1336 * Fringe Size/Pos:: Specifying where to put the window fringes.
1337 * Fringe Indicators:: Displaying indicator icons in the window fringes.
1338 * Fringe Cursors:: Displaying cursors in the right fringe.
1339 * Fringe Bitmaps:: Specifying bitmaps for fringe indicators.
1340 * Customizing Bitmaps:: Specifying your own bitmaps to use in the fringes.
1341 * Overlay Arrow:: Display of an arrow to indicate position.
1342
1343 The @code{display} Property
1344
1345 * Replacing Specs:: Display specs that replace the text.
1346 * Specified Space:: Displaying one space with a specified width.
1347 * Pixel Specification:: Specifying space width or height in pixels.
1348 * Other Display Specs:: Displaying an image; adjusting the height,
1349 spacing, and other properties of text.
1350 * Display Margins:: Displaying text or images to the side of
1351 the main text.
1352
1353 Images
1354
1355 * Image Formats:: Supported image formats.
1356 * Image Descriptors:: How to specify an image for use in @code{:display}.
1357 * XBM Images:: Special features for XBM format.
1358 * XPM Images:: Special features for XPM format.
1359 * GIF Images:: Special features for GIF format.
1360 * TIFF Images:: Special features for TIFF format.
1361 * PostScript Images:: Special features for PostScript format.
1362 * ImageMagick Images:: Special features available through ImageMagick.
1363 * Other Image Types:: Various other formats are supported.
1364 * Defining Images:: Convenient ways to define an image for later use.
1365 * Showing Images:: Convenient ways to display an image once
1366 it is defined.
1367 * Animated Images:: Some image formats can be animated.
1368 * Image Cache:: Internal mechanisms of image display.
1369
1370 Buttons
1371
1372 * Button Properties:: Button properties with special meanings.
1373 * Button Types:: Defining common properties for classes of buttons.
1374 * Making Buttons:: Adding buttons to Emacs buffers.
1375 * Manipulating Buttons:: Getting and setting properties of buttons.
1376 * Button Buffer Commands:: Buffer-wide commands and bindings for buttons.
1377
1378 Abstract Display
1379
1380 * Abstract Display Functions:: Functions in the Ewoc package.
1381 * Abstract Display Example:: Example of using Ewoc.
1382
1383 Character Display
1384
1385 * Usual Display:: The usual conventions for displaying characters.
1386 * Display Tables:: What a display table consists of.
1387 * Active Display Table:: How Emacs selects a display table to use.
1388 * Glyphs:: How to define a glyph, and what glyphs mean.
1389 * Glyphless Chars:: How glyphless characters are drawn.
1390
1391 Operating System Interface
1392
1393 * Starting Up:: Customizing Emacs startup processing.
1394 * Getting Out:: How exiting works (permanent or temporary).
1395 * System Environment:: Distinguish the name and kind of system.
1396 * User Identification:: Finding the name and user id of the user.
1397 * Time of Day:: Getting the current time.
1398 * Time Conversion:: Converting a time from numeric form to
1399 calendrical data and vice versa.
1400 * Time Parsing:: Converting a time from numeric form to text
1401 and vice versa.
1402 * Processor Run Time:: Getting the run time used by Emacs.
1403 * Time Calculations:: Adding, subtracting, comparing times, etc.
1404 * Timers:: Setting a timer to call a function at a
1405 certain time.
1406 * Idle Timers:: Setting a timer to call a function when Emacs has
1407 been idle for a certain length of time.
1408 * Terminal Input:: Accessing and recording terminal input.
1409 * Terminal Output:: Controlling and recording terminal output.
1410 * Sound Output:: Playing sounds on the computer's speaker.
1411 * X11 Keysyms:: Operating on key symbols for X Windows.
1412 * Batch Mode:: Running Emacs without terminal interaction.
1413 * Session Management:: Saving and restoring state with
1414 X Session Management.
1415 * Notifications:: Desktop notifications.
1416 * Dynamic Libraries:: On-demand loading of support libraries.
1417
1418 Starting Up Emacs
1419
1420 * Startup Summary:: Sequence of actions Emacs performs at startup.
1421 * Init File:: Details on reading the init file.
1422 * Terminal-Specific:: How the terminal-specific Lisp file is read.
1423 * Command-Line Arguments:: How command-line arguments are processed,
1424 and how you can customize them.
1425
1426 Getting Out of Emacs
1427
1428 * Killing Emacs:: Exiting Emacs irreversibly.
1429 * Suspending Emacs:: Exiting Emacs reversibly.
1430
1431 Terminal Input
1432
1433 * Input Modes:: Options for how input is processed.
1434 * Recording Input:: Saving histories of recent or all input events.
1435
1436 Preparing Lisp code for distribution
1437
1438 * Packaging Basics:: The basic concepts of Emacs Lisp packages.
1439 * Simple Packages:: How to package a single .el file.
1440 * Multi-file Packages:: How to package multiple files.
1441 * Package Archives:: Maintaining package archives.
1442
1443 Tips and Conventions
1444
1445 * Coding Conventions:: Conventions for clean and robust programs.
1446 * Key Binding Conventions:: Which keys should be bound by which programs.
1447 * Programming Tips:: Making Emacs code fit smoothly in Emacs.
1448 * Compilation Tips:: Making compiled code run fast.
1449 * Warning Tips:: Turning off compiler warnings.
1450 * Documentation Tips:: Writing readable documentation strings.
1451 * Comment Tips:: Conventions for writing comments.
1452 * Library Headers:: Standard headers for library packages.
1453
1454 GNU Emacs Internals
1455
1456 * Building Emacs:: How the dumped Emacs is made.
1457 * Pure Storage:: Kludge to make preloaded Lisp functions shareable.
1458 * Garbage Collection:: Reclaiming space for Lisp objects no longer used.
1459 * Memory Usage:: Info about total size of Lisp objects made so far.
1460 * Writing Emacs Primitives:: Writing C code for Emacs.
1461 * Object Internals:: Data formats of buffers, windows, processes.
1462
1463 Object Internals
1464
1465 * Buffer Internals:: Components of a buffer structure.
1466 * Window Internals:: Components of a window structure.
1467 * Process Internals:: Components of a process structure.
1468 @end detailmenu
1469 @end menu
1470
1471 @include intro.texi
1472 @include objects.texi
1473 @include numbers.texi
1474 @include strings.texi
1475
1476 @include lists.texi
1477 @include sequences.texi
1478 @include hash.texi
1479 @include symbols.texi
1480 @include eval.texi
1481
1482 @include control.texi
1483 @include variables.texi
1484 @include functions.texi
1485 @include macros.texi
1486
1487 @include customize.texi
1488 @include loading.texi
1489 @include compile.texi
1490 @include advice.texi
1491
1492 @c This includes edebug.texi.
1493 @include debugging.texi
1494 @include streams.texi
1495 @include minibuf.texi
1496 @include commands.texi
1497
1498 @include keymaps.texi
1499 @include modes.texi
1500 @include help.texi
1501 @include files.texi
1502
1503 @include backups.texi
1504 @include buffers.texi
1505 @include windows.texi
1506 @include frames.texi
1507
1508 @include positions.texi
1509 @include markers.texi
1510 @include text.texi
1511 @include nonascii.texi
1512
1513 @include searching.texi
1514 @include syntax.texi
1515 @include abbrevs.texi
1516 @include processes.texi
1517
1518 @include display.texi
1519 @include os.texi
1520
1521 @include package.texi
1522
1523 @c appendices
1524
1525 @include anti.texi
1526 @include doclicense.texi
1527 @include gpl.texi
1528 @include tips.texi
1529 @include internals.texi
1530 @include errors.texi
1531 @include maps.texi
1532 @include hooks.texi
1533
1534 @include index.texi
1535
1536 @ignore
1537 @node New Symbols, , Index, Top
1538 @unnumbered New Symbols Since the Previous Edition
1539
1540 @printindex tp
1541 @end ignore
1542
1543 @bye
1544
1545 \f
1546 These words prevent "local variables" above from confusing Emacs.