* lisp/files.el (file-auto-mode-skip): New var.
[bpt/emacs.git] / doc / lispref / elisp.texi
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 July 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 @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 \global\let\urlcolor=\Black % don't print links in grayscale
30 \global\let\linkcolor=\Black
31 @end ifset
32 \global\hbadness=6666 % don't worry about not-too-underfull boxes
33 @end tex
34
35 @c Combine indices.
36 @synindex cp fn
37 @syncodeindex vr fn
38 @syncodeindex ky fn
39 @syncodeindex pg fn
40 @c We use the "type index" to index new functions and variables.
41 @c @syncodeindex tp fn
42
43 @copying
44 @iftex
45 This is edition @value{VERSION} of the @cite{GNU Emacs Lisp Reference Manual},@*
46 @end iftex
47 @ifnottex
48 This is the @cite{GNU Emacs Lisp Reference Manual}
49 @end ifnottex
50 corresponding to Emacs version @value{EMACSVER}.
51
52 Copyright @copyright{} 1990-1996, 1998-2012 Free Software Foundation, Inc.
53
54 @quotation
55 Permission is granted to copy, distribute and/or modify this document
56 under the terms of the GNU Free Documentation License, Version 1.3 or
57 any later version published by the Free Software Foundation; with the
58 Invariant Sections being ``GNU General Public License,'' with the
59 Front-Cover texts being ``A GNU Manual,'' and with the Back-Cover
60 Texts as in (a) below. A copy of the license is included in the
61 section entitled ``GNU Free Documentation License.''
62
63 (a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
64 modify this GNU manual. Buying copies from the FSF supports it in
65 developing GNU and promoting software freedom.''
66 @end quotation
67 @end copying
68
69 @documentencoding ISO-8859-1
70
71 @dircategory GNU Emacs Lisp
72 @direntry
73 * Elisp: (elisp). The Emacs Lisp Reference Manual.
74 @end direntry
75
76 @titlepage
77 @title GNU Emacs Lisp Reference Manual
78 @subtitle For Emacs Version @value{EMACSVER}
79 @subtitle Revision @value{VERSION}, @value{DATE}
80
81 @author by Bil Lewis, Dan LaLiberte, Richard Stallman,
82 @author the GNU Manual Group, et al.
83 @page
84 @vskip 0pt plus 1filll
85 @insertcopying
86
87 @sp 2
88 Published by the Free Software Foundation @*
89 51 Franklin St, Fifth Floor @*
90 Boston, MA 02110-1301 @*
91 USA @*
92 ISBN 1-882114-74-4
93
94 @sp 2
95 Cover art by Etienne Suvasa.
96 @end titlepage
97
98
99 @c Print the tables of contents
100 @summarycontents
101 @contents
102
103
104 @ifnottex
105 @node Top, Introduction, (dir), (dir)
106 @top Emacs Lisp
107
108 @insertcopying
109 @end ifnottex
110
111 @c Copy any updates to vol1.texi and vol2.texi.
112 @menu
113 * Introduction:: Introduction and conventions used.
114
115 * Lisp Data Types:: Data types of objects in Emacs Lisp.
116 * Numbers:: Numbers and arithmetic functions.
117 * Strings and Characters:: Strings, and functions that work on them.
118 * Lists:: Lists, cons cells, and related functions.
119 * Sequences Arrays Vectors:: Lists, strings and vectors are called sequences.
120 Certain functions act on any kind of sequence.
121 The description of vectors is here as well.
122 * Hash Tables:: Very fast lookup-tables.
123 * Symbols:: Symbols represent names, uniquely.
124
125 * Evaluation:: How Lisp expressions are evaluated.
126 * Control Structures:: Conditionals, loops, nonlocal exits.
127 * Variables:: Using symbols in programs to stand for values.
128 * Functions:: A function is a Lisp program
129 that can be invoked from other functions.
130 * Macros:: Macros are a way to extend the Lisp language.
131 * Customization:: Making variables and faces customizable.
132
133 * Loading:: Reading files of Lisp code into Lisp.
134 * Byte Compilation:: Compilation makes programs run faster.
135 * Advising Functions:: Adding to the definition of a function.
136 * Debugging:: Tools and tips for debugging Lisp programs.
137
138 * Read and Print:: Converting Lisp objects to text and back.
139 * Minibuffers:: Using the minibuffer to read input.
140 * Command Loop:: How the editor command loop works,
141 and how you can call its subroutines.
142 * Keymaps:: Defining the bindings from keys to commands.
143 * Modes:: Defining major and minor modes.
144 * Documentation:: Writing and using documentation strings.
145
146 * Files:: Accessing files.
147 * Backups and Auto-Saving:: Controlling how backups and auto-save
148 files are made.
149 * Buffers:: Creating and using buffer objects.
150 * Windows:: Manipulating windows and displaying buffers.
151 * Frames:: Making multiple system-level windows.
152 * Positions:: Buffer positions and motion functions.
153 * Markers:: Markers represent positions and update
154 automatically when the text is changed.
155
156 * Text:: Examining and changing text in buffers.
157 * Non-ASCII Characters:: Non-ASCII text in buffers and strings.
158 * Searching and Matching:: Searching buffers for strings or regexps.
159 * Syntax Tables:: The syntax table controls word and list parsing.
160 * Abbrevs:: How Abbrev mode works, and its data structures.
161
162 * Processes:: Running and communicating with subprocesses.
163 * Display:: Features for controlling the screen display.
164 * System Interface:: Getting the user id, system type, environment
165 variables, and other such things.
166
167 * Packaging:: Preparing Lisp code for distribution.
168
169 Appendices
170
171 * Antinews:: Info for users downgrading to Emacs 23.
172 * GNU Free Documentation License:: The license for this documentation.
173 * GPL:: Conditions for copying and changing GNU Emacs.
174 * Tips:: Advice and coding conventions for Emacs Lisp.
175 * GNU Emacs Internals:: Building and dumping Emacs;
176 internal data structures.
177 * Standard Errors:: List of some standard error symbols.
178 * Standard Keymaps:: List of some standard keymaps.
179 * Standard Hooks:: List of some standard hook variables.
180
181 * Index:: Index including concepts, functions, variables,
182 and other terms.
183
184 @ignore
185 * New Symbols:: New functions and variables in Emacs @value{EMACSVER}.
186 @end ignore
187
188 @c Do NOT modify the following 3 lines! They must have this form to
189 @c be correctly identified by `texinfo-multiple-files-update'. In
190 @c particular, the detailed menu header line MUST be identical to the
191 @c value of `texinfo-master-menu-header'. See texnfo-upd.el.
192 @c Copy any updates to vol1.texi and vol2.texi.
193
194 @detailmenu
195 --- The Detailed Node Listing ---
196 ---------------------------------
197
198 Here are other nodes that are subnodes of those already listed,
199 mentioned here so you can get to them in one step:
200
201 Introduction
202
203 * Caveats:: Flaws and a request for help.
204 * Lisp History:: Emacs Lisp is descended from Maclisp.
205 * Conventions:: How the manual is formatted.
206 * Version Info:: Which Emacs version is running?
207 * Acknowledgements:: The authors, editors, and sponsors of this manual.
208
209 Conventions
210
211 * Some Terms:: Explanation of terms we use in this manual.
212 * nil and t:: How the symbols @code{nil} and @code{t} are used.
213 * Evaluation Notation:: The format we use for examples of evaluation.
214 * Printing Notation:: The format we use when examples print text.
215 * Error Messages:: The format we use for examples of errors.
216 * Buffer Text Notation:: The format we use for buffer contents in examples.
217 * Format of Descriptions:: Notation for describing functions, variables, etc.
218
219 Format of Descriptions
220
221 * A Sample Function Description:: A description of an imaginary
222 function, @code{foo}.
223 * A Sample Variable Description:: A description of an imaginary
224 variable, @code{electric-future-map}.
225
226 Lisp Data Types
227
228 * Printed Representation:: How Lisp objects are represented as text.
229 * Comments:: Comments and their formatting conventions.
230 * Programming Types:: Types found in all Lisp systems.
231 * Editing Types:: Types specific to Emacs.
232 * Circular Objects:: Read syntax for circular structure.
233 * Type Predicates:: Tests related to types.
234 * Equality Predicates:: Tests of equality between any two objects.
235
236 Programming Types
237
238 * Integer Type:: Numbers without fractional parts.
239 * Floating Point Type:: Numbers with fractional parts and with a large range.
240 * Character Type:: The representation of letters, numbers and
241 control characters.
242 * Symbol Type:: A multi-use object that refers to a function,
243 variable, or property list, and has a unique identity.
244 * Sequence Type:: Both lists and arrays are classified as sequences.
245 * Cons Cell Type:: Cons cells, and lists (which are made from cons cells).
246 * Array Type:: Arrays include strings and vectors.
247 * String Type:: An (efficient) array of characters.
248 * Vector Type:: One-dimensional arrays.
249 * Char-Table Type:: One-dimensional sparse arrays indexed by characters.
250 * Bool-Vector Type:: One-dimensional arrays of @code{t} or @code{nil}.
251 * Hash Table Type:: Super-fast lookup tables.
252 * Function Type:: A piece of executable code you can call from elsewhere.
253 * Macro Type:: A method of expanding an expression into another
254 expression, more fundamental but less pretty.
255 * Primitive Function Type:: A function written in C, callable from Lisp.
256 * Byte-Code Type:: A function written in Lisp, then compiled.
257 * Autoload Type:: A type used for automatically loading seldom-used
258 functions.
259
260 Character Type
261
262 * Basic Char Syntax:: Syntax for regular characters.
263 * General Escape Syntax:: How to specify characters by their codes.
264 * Ctl-Char Syntax:: Syntax for control characters.
265 * Meta-Char Syntax:: Syntax for meta-characters.
266 * Other Char Bits:: Syntax for hyper-, super-, and alt-characters.
267
268 Cons Cell and List Types
269
270 * Box Diagrams:: Drawing pictures of lists.
271 * Dotted Pair Notation:: A general syntax for cons cells.
272 * Association List Type:: A specially constructed list.
273
274 String Type
275
276 * Syntax for Strings:: How to specify Lisp strings.
277 * Non-ASCII in Strings:: International characters in strings.
278 * Nonprinting Characters:: Literal unprintable characters in strings.
279 * Text Props and Strings:: Strings with text properties.
280
281 Editing Types
282
283 * Buffer Type:: The basic object of editing.
284 * Marker Type:: A position in a buffer.
285 * Window Type:: Buffers are displayed in windows.
286 * Frame Type:: Windows subdivide frames.
287 * Terminal Type:: A terminal device displays frames.
288 * Window Configuration Type:: Recording the way a frame is subdivided.
289 * Frame Configuration Type:: Recording the status of all frames.
290 * Process Type:: A subprocess of Emacs running on the underlying OS.
291 * Stream Type:: Receive or send characters.
292 * Keymap Type:: What function a keystroke invokes.
293 * Overlay Type:: How an overlay is represented.
294 * Font Type:: Fonts for displaying text.
295
296 Numbers
297
298 * Integer Basics:: Representation and range of integers.
299 * Float Basics:: Representation and range of floating point.
300 * Predicates on Numbers:: Testing for numbers.
301 * Comparison of Numbers:: Equality and inequality predicates.
302 * Numeric Conversions:: Converting float to integer and vice versa.
303 * Arithmetic Operations:: How to add, subtract, multiply and divide.
304 * Rounding Operations:: Explicitly rounding floating point numbers.
305 * Bitwise Operations:: Logical and, or, not, shifting.
306 * Math Functions:: Trig, exponential and logarithmic functions.
307 * Random Numbers:: Obtaining random integers, predictable or not.
308
309 Strings and Characters
310
311 * String Basics:: Basic properties of strings and characters.
312 * Predicates for Strings:: Testing whether an object is a string or char.
313 * Creating Strings:: Functions to allocate new strings.
314 * Modifying Strings:: Altering the contents of an existing string.
315 * Text Comparison:: Comparing characters or strings.
316 * String Conversion:: Converting to and from characters and strings.
317 * Formatting Strings:: @code{format}: Emacs's analogue of @code{printf}.
318 * Case Conversion:: Case conversion functions.
319 * Case Tables:: Customizing case conversion.
320
321 Lists
322
323 * Cons Cells:: How lists are made out of cons cells.
324 * List-related Predicates:: Is this object a list? Comparing two lists.
325 * List Elements:: Extracting the pieces of a list.
326 * Building Lists:: Creating list structure.
327 * List Variables:: Modifying lists stored in variables.
328 * Modifying Lists:: Storing new pieces into an existing list.
329 * Sets And Lists:: A list can represent a finite mathematical set.
330 * Association Lists:: A list can represent a finite relation or mapping.
331
332 Modifying Existing List Structure
333
334 * Setcar:: Replacing an element in a list.
335 * Setcdr:: Replacing part of the list backbone.
336 This can be used to remove or add elements.
337 * Rearrangement:: Reordering the elements in a list; combining lists.
338
339 Sequences, Arrays, and Vectors
340
341 * Sequence Functions:: Functions that accept any kind of sequence.
342 * Arrays:: Characteristics of arrays in Emacs Lisp.
343 * Array Functions:: Functions specifically for arrays.
344 * Vectors:: Special characteristics of Emacs Lisp vectors.
345 * Vector Functions:: Functions specifically for vectors.
346 * Char-Tables:: How to work with char-tables.
347 * Bool-Vectors:: How to work with bool-vectors.
348 * Rings:: Managing a fixed-size ring of objects.
349
350 Hash Tables
351
352 * Creating Hash:: Functions to create hash tables.
353 * Hash Access:: Reading and writing the hash table contents.
354 * Defining Hash:: Defining new comparison methods.
355 * Other Hash:: Miscellaneous.
356
357 Symbols
358
359 * Symbol Components:: Symbols have names, values, function definitions
360 and property lists.
361 * Definitions:: A definition says how a symbol will be used.
362 * Creating Symbols:: How symbols are kept unique.
363 * Property Lists:: Each symbol has a property list
364 for recording miscellaneous information.
365
366 Property Lists
367
368 * Plists and Alists:: Comparison of the advantages of property
369 lists and association lists.
370 * Symbol Plists:: Functions to access symbols' property lists.
371 * Other Plists:: Accessing property lists stored elsewhere.
372
373 Evaluation
374
375 * Intro Eval:: Evaluation in the scheme of things.
376 * Forms:: How various sorts of objects are evaluated.
377 * Quoting:: Avoiding evaluation (to put constants in
378 the program).
379 * Backquote:: Easier construction of list structure.
380 * Eval:: How to invoke the Lisp interpreter explicitly.
381
382 Kinds of Forms
383
384 * Self-Evaluating Forms:: Forms that evaluate to themselves.
385 * Symbol Forms:: Symbols evaluate as variables.
386 * Classifying Lists:: How to distinguish various sorts of list forms.
387 * Function Indirection:: When a symbol appears as the car of a list,
388 we find the real function via the symbol.
389 * Function Forms:: Forms that call functions.
390 * Macro Forms:: Forms that call macros.
391 * Special Forms:: "Special forms" are idiosyncratic primitives,
392 most of them extremely important.
393 * Autoloading:: Functions set up to load files
394 containing their real definitions.
395
396 Control Structures
397
398 * Sequencing:: Evaluation in textual order.
399 * Conditionals:: @code{if}, @code{cond}, @code{when}, @code{unless}.
400 * Combining Conditions:: @code{and}, @code{or}, @code{not}.
401 * Iteration:: @code{while} loops.
402 * Nonlocal Exits:: Jumping out of a sequence.
403
404 Nonlocal Exits
405
406 * Catch and Throw:: Nonlocal exits for the program's own purposes.
407 * Examples of Catch:: Showing how such nonlocal exits can be written.
408 * Errors:: How errors are signaled and handled.
409 * Cleanups:: Arranging to run a cleanup form if an
410 error happens.
411
412 Errors
413
414 * Signaling Errors:: How to report an error.
415 * Processing of Errors:: What Emacs does when you report an error.
416 * Handling Errors:: How you can trap errors and continue execution.
417 * Error Symbols:: How errors are classified for trapping them.
418
419 Variables
420
421 * Global Variables:: Variable values that exist permanently, everywhere.
422 * Constant Variables:: Certain "variables" have values that never change.
423 * Local Variables:: Variable values that exist only temporarily.
424 * Void Variables:: Symbols that lack values.
425 * Defining Variables:: A definition says a symbol is used as a variable.
426 * Tips for Defining:: Things you should think about when you
427 define a variable.
428 * Accessing Variables:: Examining values of variables whose names
429 are known only at run time.
430 * Setting Variables:: Storing new values in variables.
431 * Variable Scoping:: How Lisp chooses among local and global values.
432 * Buffer-Local Variables:: Variable values in effect only in one buffer.
433 * File Local Variables:: Handling local variable lists in files.
434 * Directory Local Variables:: Local variables common to all files in a
435 directory.
436 * Variable Aliases:: Variables that are aliases for other variables.
437 * Variables with Restricted Values:: Non-constant variables whose value can
438 @emph{not} be an arbitrary Lisp object.
439
440 Scoping Rules for Variable Bindings
441
442 * Dynamic Binding:: The default for binding local variables in Emacs.
443 * Dynamic Binding Tips:: Avoiding problems with dynamic binding.
444 * Lexical Binding:: A different type of local variable binding.
445 * Using Lexical Binding:: How to enable lexical binding.
446
447 Buffer-Local Variables
448
449 * Intro to Buffer-Local:: Introduction and concepts.
450 * Creating Buffer-Local:: Creating and destroying buffer-local bindings.
451 * Default Value:: The default value is seen in buffers
452 that don't have their own buffer-local values.
453
454 Functions
455
456 * What Is a Function:: Lisp functions vs. primitives; terminology.
457 * Lambda Expressions:: How functions are expressed as Lisp objects.
458 * Function Names:: A symbol can serve as the name of a function.
459 * Defining Functions:: Lisp expressions for defining functions.
460 * Calling Functions:: How to use an existing function.
461 * Mapping Functions:: Applying a function to each element of a list, etc.
462 * Anonymous Functions:: Lambda expressions are functions with no names.
463 * Function Cells:: Accessing or setting the function definition
464 of a symbol.
465 * Closures:: Functions that enclose a lexical environment.
466 * Obsolete Functions:: Declaring functions obsolete.
467 * Inline Functions:: Defining functions that the compiler
468 will expand inline.
469 * Declaring Functions:: Telling the compiler that a function is defined.
470 * Function Safety:: Determining whether a function is safe to call.
471 * Related Topics:: Cross-references to specific Lisp primitives
472 that have a special bearing on how
473 functions work.
474
475 Lambda Expressions
476
477 * Lambda Components:: The parts of a lambda expression.
478 * Simple Lambda:: A simple example.
479 * Argument List:: Details and special features of argument lists.
480 * Function Documentation:: How to put documentation in a function.
481
482 Macros
483
484 * Simple Macro:: A basic example.
485 * Expansion:: How, when and why macros are expanded.
486 * Compiling Macros:: How macros are expanded by the compiler.
487 * Defining Macros:: How to write a macro definition.
488 * Problems with Macros:: Don't evaluate the macro arguments too many times.
489 Don't hide the user's variables.
490 * Indenting Macros:: Specifying how to indent macro calls.
491
492 Common Problems Using Macros
493
494 * Wrong Time:: Do the work in the expansion, not in the macro.
495 * Argument Evaluation:: The expansion should evaluate each macro arg once.
496 * Surprising Local Vars:: Local variable bindings in the expansion
497 require special care.
498 * Eval During Expansion:: Don't evaluate them; put them in the expansion.
499 * Repeated Expansion:: Avoid depending on how many times expansion is done.
500
501 Customization Settings
502
503 * Common Keywords:: Common keyword arguments for all kinds of
504 customization declarations.
505 * Group Definitions:: Writing customization group definitions.
506 * Variable Definitions:: Declaring user options.
507 * Customization Types:: Specifying the type of a user option.
508 * Applying Customizations:: Functions to apply customization settings.
509 * Custom Themes:: Writing Custom themes.
510
511 Customization Types
512
513 * Simple Types:: Simple customization types: sexp, integer, etc.
514 * Composite Types:: Build new types from other types or data.
515 * Splicing into Lists:: Splice elements into list with @code{:inline}.
516 * Type Keywords:: Keyword-argument pairs in a customization type.
517 * Defining New Types:: Give your type a name.
518
519 Loading
520
521 * How Programs Do Loading:: The @code{load} function and others.
522 * Load Suffixes:: Details about the suffixes that @code{load} tries.
523 * Library Search:: Finding a library to load.
524 * Loading Non-ASCII:: Non-@acronym{ASCII} characters in Emacs Lisp files.
525 * Autoload:: Setting up a function to autoload.
526 * Repeated Loading:: Precautions about loading a file twice.
527 * Named Features:: Loading a library if it isn't already loaded.
528 * Where Defined:: Finding which file defined a certain symbol.
529 * Unloading:: How to "unload" a library that was loaded.
530 * Hooks for Loading:: Providing code to be run when
531 particular libraries are loaded.
532
533 Byte Compilation
534
535 * Speed of Byte-Code:: An example of speedup from byte compilation.
536 * Compilation Functions:: Byte compilation functions.
537 * Docs and Compilation:: Dynamic loading of documentation strings.
538 * Dynamic Loading:: Dynamic loading of individual functions.
539 * Eval During Compile:: Code to be evaluated when you compile.
540 * Compiler Errors:: Handling compiler error messages.
541 * Byte-Code Objects:: The data type used for byte-compiled functions.
542 * Disassembly:: Disassembling byte-code; how to read byte-code.
543
544 Advising Emacs Lisp Functions
545
546 * Simple Advice:: A simple example to explain the basics of advice.
547 * Defining Advice:: Detailed description of @code{defadvice}.
548 * Around-Advice:: Wrapping advice around a function's definition.
549 * Computed Advice:: ...is to @code{defadvice} as @code{fset} is to @code{defun}.
550 * Activation of Advice:: Advice doesn't do anything until you activate it.
551 * Enabling Advice:: You can enable or disable each piece of advice.
552 * Preactivation:: Preactivation is a way of speeding up the
553 loading of compiled advice.
554 * Argument Access in Advice:: How advice can access the function's arguments.
555 * Combined Definition:: How advice is implemented.
556
557 Debugging Lisp Programs
558
559 * Debugger:: A debugger for the Emacs Lisp evaluator.
560 * Edebug:: A source-level Emacs Lisp debugger.
561 * Syntax Errors:: How to find syntax errors.
562 * Test Coverage:: Ensuring you have tested all branches in your code.
563
564 The Lisp Debugger
565
566 * Error Debugging:: Entering the debugger when an error happens.
567 * Infinite Loops:: Stopping and debugging a program that doesn't exit.
568 * Function Debugging:: Entering it when a certain function is called.
569 * Explicit Debug:: Entering it at a certain point in the program.
570 * Using Debugger:: What the debugger does; what you see while in it.
571 * Debugger Commands:: Commands used while in the debugger.
572 * Invoking the Debugger:: How to call the function @code{debug}.
573 * Internals of Debugger:: Subroutines of the debugger, and global variables.
574
575 Edebug
576
577 * Using Edebug:: Introduction to use of Edebug.
578 * Instrumenting:: You must instrument your code
579 in order to debug it with Edebug.
580 * Edebug Execution Modes:: Execution modes, stopping more or less often.
581 * Jumping:: Commands to jump to a specified place.
582 * Edebug Misc:: Miscellaneous commands.
583 * Breaks:: Setting breakpoints to make the program stop.
584 * Trapping Errors:: Trapping errors with Edebug.
585 * Edebug Views:: Views inside and outside of Edebug.
586 * Edebug Eval:: Evaluating expressions within Edebug.
587 * Eval List:: Expressions whose values are displayed
588 each time you enter Edebug.
589 * Printing in Edebug:: Customization of printing.
590 * Trace Buffer:: How to produce trace output in a buffer.
591 * Coverage Testing:: How to test evaluation coverage.
592 * The Outside Context:: Data that Edebug saves and restores.
593 * Edebug and Macros:: Specifying how to handle macro calls.
594 * Edebug Options:: Option variables for customizing Edebug.
595
596 Breaks
597
598 * Breakpoints:: Breakpoints at stop points.
599 * Global Break Condition:: Breaking on an event.
600 * Source Breakpoints:: Embedding breakpoints in source code.
601
602 The Outside Context
603
604 * Checking Whether to Stop::When Edebug decides what to do.
605 * Edebug Display Update:: When Edebug updates the display.
606 * Edebug Recursive Edit:: When Edebug stops execution.
607
608 Edebug and Macros
609
610 * Instrumenting Macro Calls::The basic problem.
611 * Specification List:: How to specify complex patterns of evaluation.
612 * Backtracking:: What Edebug does when matching fails.
613 * Specification Examples:: To help understand specifications.
614
615 Debugging Invalid Lisp Syntax
616
617 * Excess Open:: How to find a spurious open paren or missing close.
618 * Excess Close:: How to find a spurious close paren or missing open.
619
620 Reading and Printing Lisp Objects
621
622 * Streams Intro:: Overview of streams, reading and printing.
623 * Input Streams:: Various data types that can be used as
624 input streams.
625 * Input Functions:: Functions to read Lisp objects from text.
626 * Output Streams:: Various data types that can be used as
627 output streams.
628 * Output Functions:: Functions to print Lisp objects as text.
629 * Output Variables:: Variables that control what the printing
630 functions do.
631
632 Minibuffers
633
634 * Intro to Minibuffers:: Basic information about minibuffers.
635 * Text from Minibuffer:: How to read a straight text string.
636 * Object from Minibuffer:: How to read a Lisp object or expression.
637 * Minibuffer History:: Recording previous minibuffer inputs
638 so the user can reuse them.
639 * Initial Input:: Specifying initial contents for the minibuffer.
640 * Completion:: How to invoke and customize completion.
641 * Yes-or-No Queries:: Asking a question with a simple answer.
642 * Multiple Queries:: Asking a series of similar questions.
643 * Reading a Password:: Reading a password from the terminal.
644 * Minibuffer Commands:: Commands used as key bindings in minibuffers.
645 * Minibuffer Windows:: Operating on the special minibuffer windows.
646 * Minibuffer Contents:: How such commands access the minibuffer text.
647 * Recursive Mini:: Whether recursive entry to minibuffer is allowed.
648 * Minibuffer Misc:: Various customization hooks and variables.
649
650 Completion
651
652 * Basic Completion:: Low-level functions for completing strings.
653 * Minibuffer Completion:: Invoking the minibuffer with completion.
654 * Completion Commands:: Minibuffer commands that do completion.
655 * High-Level Completion:: Convenient special cases of completion
656 (reading buffer names, variable names, etc.).
657 * Reading File Names:: Using completion to read file names and
658 shell commands.
659 * Completion Variables:: Variables controlling completion behavior.
660 * Programmed Completion:: Writing your own completion function.
661 * Completion in Buffers:: Completing text in ordinary buffers.
662
663 Command Loop
664
665 * Command Overview:: How the command loop reads commands.
666 * Defining Commands:: Specifying how a function should read arguments.
667 * Interactive Call:: Calling a command, so that it will read arguments.
668 * Distinguish Interactive:: Making a command distinguish interactive calls.
669 * Command Loop Info:: Variables set by the command loop for you to examine.
670 * Adjusting Point:: Adjustment of point after a command.
671 * Input Events:: What input looks like when you read it.
672 * Reading Input:: How to read input events from the keyboard or mouse.
673 * Special Events:: Events processed immediately and individually.
674 * Waiting:: Waiting for user input or elapsed time.
675 * Quitting:: How @kbd{C-g} works. How to catch or defer quitting.
676 * Prefix Command Arguments:: How the commands to set prefix args work.
677 * Recursive Editing:: Entering a recursive edit,
678 and why you usually shouldn't.
679 * Disabling Commands:: How the command loop handles disabled commands.
680 * Command History:: How the command history is set up, and how accessed.
681 * Keyboard Macros:: How keyboard macros are implemented.
682
683 Defining Commands
684
685 * Using Interactive:: General rules for @code{interactive}.
686 * Interactive Codes:: The standard letter-codes for reading arguments
687 in various ways.
688 * Interactive Examples:: Examples of how to read interactive arguments.
689
690 Input Events
691
692 * Keyboard Events:: Ordinary characters--keys with symbols on them.
693 * Function Keys:: Function keys--keys with names, not symbols.
694 * Mouse Events:: Overview of mouse events.
695 * Click Events:: Pushing and releasing a mouse button.
696 * Drag Events:: Moving the mouse before releasing the button.
697 * Button-Down Events:: A button was pushed and not yet released.
698 * Repeat Events:: Double and triple click (or drag, or down).
699 * Motion Events:: Just moving the mouse, not pushing a button.
700 * Focus Events:: Moving the mouse between frames.
701 * Misc Events:: Other events the system can generate.
702 * Event Examples:: Examples of the lists for mouse events.
703 * Classifying Events:: Finding the modifier keys in an event symbol.
704 Event types.
705 * Accessing Mouse:: Functions to extract info from mouse events.
706 * Accessing Scroll:: Functions to get info from scroll bar events.
707 * Strings of Events:: Special considerations for putting
708 keyboard character events in a string.
709
710 Reading Input
711
712 * Key Sequence Input:: How to read one key sequence.
713 * Reading One Event:: How to read just one event.
714 * Event Mod:: How Emacs modifies events as they are read.
715 * Invoking the Input Method:: How reading an event uses the input method.
716 * Quoted Character Input:: Asking the user to specify a character.
717 * Event Input Misc:: How to reread or throw away input events.
718
719 Keymaps
720
721 * Key Sequences:: Key sequences as Lisp objects.
722 * Keymap Basics:: Basic concepts of keymaps.
723 * Format of Keymaps:: What a keymap looks like as a Lisp object.
724 * Creating Keymaps:: Functions to create and copy keymaps.
725 * Inheritance and Keymaps:: How one keymap can inherit the bindings
726 of another keymap.
727 * Prefix Keys:: Defining a key with a keymap as its definition.
728 * Active Keymaps:: How Emacs searches the active keymaps
729 for a key binding.
730 * Searching Keymaps:: A pseudo-Lisp summary of searching active maps.
731 * Controlling Active Maps:: Each buffer has a local keymap
732 to override the standard (global) bindings.
733 A minor mode can also override them.
734 * Key Lookup:: Finding a key's binding in one keymap.
735 * Functions for Key Lookup:: How to request key lookup.
736 * Changing Key Bindings:: Redefining a key in a keymap.
737 * Remapping Commands:: A keymap can translate one command to another.
738 * Translation Keymaps:: Keymaps for translating sequences of events.
739 * Key Binding Commands:: Interactive interfaces for redefining keys.
740 * Scanning Keymaps:: Looking through all keymaps, for printing help.
741 * Menu Keymaps:: Defining a menu as a keymap.
742
743 Menu Keymaps
744
745 * Defining Menus:: How to make a keymap that defines a menu.
746 * Mouse Menus:: How users actuate the menu with the mouse.
747 * Keyboard Menus:: How users actuate the menu with the keyboard.
748 * Menu Example:: Making a simple menu.
749 * Menu Bar:: How to customize the menu bar.
750 * Tool Bar:: A tool bar is a row of images.
751 * Modifying Menus:: How to add new items to a menu.
752
753 Defining Menus
754
755 * Simple Menu Items:: A simple kind of menu key binding,
756 limited in capabilities.
757 * Extended Menu Items:: More powerful menu item definitions
758 let you specify keywords to enable
759 various features.
760 * Menu Separators:: Drawing a horizontal line through a menu.
761 * Alias Menu Items:: Using command aliases in menu items.
762 * Toolkit Differences:: Not all toolkits provide the same features.
763
764 Major and Minor Modes
765
766 * Hooks:: How to use hooks; how to write code that provides hooks.
767 * Major Modes:: Defining major modes.
768 * Minor Modes:: Defining minor modes.
769 * Mode Line Format:: Customizing the text that appears in the mode line.
770 * Imenu:: Providing a menu of definitions made in a buffer.
771 * Font Lock Mode:: How modes can highlight text according to syntax.
772 * Auto-Indentation:: How to teach Emacs to indent for a major mode.
773 * Desktop Save Mode:: How modes can have buffer state saved between
774 Emacs sessions.
775
776 Hooks
777
778 * Running Hooks:: How to run a hook.
779 * Setting Hooks:: How to put functions on a hook, or remove them.
780
781 Major Modes
782
783 * Major Mode Conventions:: Coding conventions for keymaps, etc.
784 * Auto Major Mode:: How Emacs chooses the major mode automatically.
785 * Mode Help:: Finding out how to use a mode.
786 * Derived Modes:: Defining a new major mode based on another major
787 mode.
788 * Basic Major Modes:: Modes that other modes are often derived from.
789 * Mode Hooks:: Hooks run at the end of major mode functions.
790 * Tabulated List Mode:: Parent mode for buffers containing tabulated data.
791 * Generic Modes:: Defining a simple major mode that supports
792 comment syntax and Font Lock mode.
793 * Example Major Modes:: Text mode and Lisp modes.
794
795 Minor Modes
796
797 * Minor Mode Conventions:: Tips for writing a minor mode.
798 * Keymaps and Minor Modes:: How a minor mode can have its own keymap.
799 * Defining Minor Modes:: A convenient facility for defining minor modes.
800
801 Mode Line Format
802
803 * Mode Line Basics:: Basic ideas of mode line control.
804 * Mode Line Data:: The data structure that controls the mode line.
805 * Mode Line Top:: The top level variable, mode-line-format.
806 * Mode Line Variables:: Variables used in that data structure.
807 * %-Constructs:: Putting information into a mode line.
808 * Properties in Mode:: Using text properties in the mode line.
809 * Header Lines:: Like a mode line, but at the top.
810 * Emulating Mode Line:: Formatting text as the mode line would.
811
812 Font Lock Mode
813
814 * Font Lock Basics:: Overview of customizing Font Lock.
815 * Search-based Fontification:: Fontification based on regexps.
816 * Customizing Keywords:: Customizing search-based fontification.
817 * Other Font Lock Variables:: Additional customization facilities.
818 * Levels of Font Lock:: Each mode can define alternative levels
819 so that the user can select more or less.
820 * Precalculated Fontification:: How Lisp programs that produce the buffer
821 contents can also specify how to fontify it.
822 * Faces for Font Lock:: Special faces specifically for Font Lock.
823 * Syntactic Font Lock:: Fontification based on syntax tables.
824 * Multiline Font Lock:: How to coerce Font Lock into properly
825 highlighting multiline constructs.
826
827 Multiline Font Lock Constructs
828
829 * Font Lock Multiline:: Marking multiline chunks with a text property.
830 * Region to Refontify:: Controlling which region gets refontified
831 after a buffer change.
832
833 Automatic Indentation of code
834
835 * SMIE:: A simple minded indentation engine.
836
837 Simple Minded Indentation Engine
838
839 * SMIE setup:: SMIE setup and features.
840 * Operator Precedence Grammars:: A very simple parsing technique.
841 * SMIE Grammar:: Defining the grammar of a language.
842 * SMIE Lexer:: Defining tokens.
843 * SMIE Tricks:: Working around the parser's limitations.
844 * SMIE Indentation:: Specifying indentation rules.
845 * SMIE Indentation Helpers:: Helper functions for indentation rules.
846 * SMIE Indentation Example:: Sample indentation rules.
847
848 Documentation
849
850 * Documentation Basics:: Where doc strings are defined and stored.
851 * Accessing Documentation:: How Lisp programs can access doc strings.
852 * Keys in Documentation:: Substituting current key bindings.
853 * Describing Characters:: Making printable descriptions of
854 non-printing characters and key sequences.
855 * Help Functions:: Subroutines used by Emacs help facilities.
856
857 Files
858
859 * Visiting Files:: Reading files into Emacs buffers for editing.
860 * Saving Buffers:: Writing changed buffers back into files.
861 * Reading from Files:: Reading files into buffers without visiting.
862 * Writing to Files:: Writing new files from parts of buffers.
863 * File Locks:: Locking and unlocking files, to prevent
864 simultaneous editing by two people.
865 * Information about Files:: Testing existence, accessibility, size of files.
866 * Changing Files:: Renaming files, changing permissions, etc.
867 * File Names:: Decomposing and expanding file names.
868 * Contents of Directories:: Getting a list of the files in a directory.
869 * Create/Delete Dirs:: Creating and Deleting Directories.
870 * Magic File Names:: Special handling for certain file names.
871 * Format Conversion:: Conversion to and from various file formats.
872
873 Visiting Files
874
875 * Visiting Functions:: The usual interface functions for visiting.
876 * Subroutines of Visiting:: Lower-level subroutines that they use.
877
878 Information about Files
879
880 * Testing Accessibility:: Is a given file readable? Writable?
881 * Kinds of Files:: Is it a directory? A symbolic link?
882 * Truenames:: Eliminating symbolic links from a file name.
883 * File Attributes:: How large is it? Any other names? Etc.
884 * Locating Files:: How to find a file in standard places.
885
886 File Names
887
888 * File Name Components:: The directory part of a file name, and the rest.
889 * Relative File Names:: Some file names are relative to a current directory.
890 * Directory Names:: A directory's name as a directory
891 is different from its name as a file.
892 * File Name Expansion:: Converting relative file names to absolute ones.
893 * Unique File Names:: Generating names for temporary files.
894 * File Name Completion:: Finding the completions for a given file name.
895 * Standard File Names:: If your package uses a fixed file name,
896 how to handle various operating systems simply.
897
898 File Format Conversion
899
900 * Format Conversion Overview:: @code{insert-file-contents} and @code{write-region}.
901 * Format Conversion Round-Trip:: Using @code{format-alist}.
902 * Format Conversion Piecemeal:: Specifying non-paired conversion.
903
904 Backups and Auto-Saving
905
906 * Backup Files:: How backup files are made; how their names
907 are chosen.
908 * Auto-Saving:: How auto-save files are made; how their
909 names are chosen.
910 * Reverting:: @code{revert-buffer}, and how to customize
911 what it does.
912
913 Backup Files
914
915 * Making Backups:: How Emacs makes backup files, and when.
916 * Rename or Copy:: Two alternatives: renaming the old file
917 or copying it.
918 * Numbered Backups:: Keeping multiple backups for each source file.
919 * Backup Names:: How backup file names are computed; customization.
920
921 Buffers
922
923 * Buffer Basics:: What is a buffer?
924 * Current Buffer:: Designating a buffer as current
925 so that primitives will access its contents.
926 * Buffer Names:: Accessing and changing buffer names.
927 * Buffer File Name:: The buffer file name indicates which file
928 is visited.
929 * Buffer Modification:: A buffer is @dfn{modified} if it needs to be saved.
930 * Modification Time:: Determining whether the visited file was changed
931 "behind Emacs's back".
932 * Read Only Buffers:: Modifying text is not allowed in a
933 read-only buffer.
934 * The Buffer List:: How to look at all the existing buffers.
935 * Creating Buffers:: Functions that create buffers.
936 * Killing Buffers:: Buffers exist until explicitly killed.
937 * Indirect Buffers:: An indirect buffer shares text with some
938 other buffer.
939 * Swapping Text:: Swapping text between two buffers.
940 * Buffer Gap:: The gap in the buffer.
941
942 Windows
943
944 * Basic Windows:: Basic information on using windows.
945 * Windows and Frames:: Relating windows to the frame they appear on.
946 * Window Sizes:: Accessing a window's size.
947 * Resizing Windows:: Changing the sizes of windows.
948 * Splitting Windows:: Splitting one window into two windows.
949 * Deleting Windows:: Deleting a window gives its space to other windows.
950 * Selecting Windows:: The selected window is the one that you edit in.
951 * Cyclic Window Ordering:: Moving around the existing windows.
952 * Buffers and Windows:: Each window displays the contents of a buffer.
953 * Switching Buffers:: Higher-level functions for switching to a buffer.
954 * Choosing Window:: How to choose a window for displaying a buffer.
955 * Display Action Functions:: Subroutines for @code{display-buffer}.
956 * Choosing Window Options:: Extra options affecting how buffers are displayed.
957 * Window History:: Each window remembers the buffers displayed in it.
958 * Dedicated Windows:: How to avoid displaying another buffer in
959 a specific window.
960 * Quitting Windows:: How to restore the state prior to displaying a
961 buffer.
962 * Window Point:: Each window has its own location of point.
963 * Window Start and End:: Buffer positions indicating which text is
964 on-screen in a window.
965 * Textual Scrolling:: Moving text up and down through the window.
966 * Vertical Scrolling:: Moving the contents up and down on the window.
967 * Horizontal Scrolling:: Moving the contents sideways on the window.
968 * Coordinates and Windows:: Converting coordinates to windows.
969 * Window Configurations:: Saving and restoring the state of the screen.
970 * Window Parameters:: Associating additional information with windows.
971 * Window Hooks:: Hooks for scrolling, window size changes,
972 redisplay going past a certain point,
973 or window configuration changes.
974
975 Frames
976
977 * Creating Frames:: Creating additional frames.
978 * Multiple Terminals:: Displaying on several different devices.
979 * Frame Parameters:: Controlling frame size, position, font, etc.
980 * Terminal Parameters:: Parameters common for all frames on terminal.
981 * Frame Titles:: Automatic updating of frame titles.
982 * Deleting Frames:: Frames last until explicitly deleted.
983 * Finding All Frames:: How to examine all existing frames.
984 * Minibuffers and Frames:: How a frame finds the minibuffer to use.
985 * Input Focus:: Specifying the selected frame.
986 * Visibility of Frames:: Frames may be visible or invisible, or icons.
987 * Raising and Lowering:: Raising a frame makes it hide other windows;
988 lowering it makes the others hide it.
989 * Frame Configurations:: Saving the state of all frames.
990 * Mouse Tracking:: Getting events that say when the mouse moves.
991 * Mouse Position:: Asking where the mouse is, or moving it.
992 * Pop-Up Menus:: Displaying a menu for the user to select from.
993 * Dialog Boxes:: Displaying a box to ask yes or no.
994 * Pointer Shape:: Specifying the shape of the mouse pointer.
995 * Window System Selections::Transferring text to and from other X clients.
996 * Drag and Drop:: Internals of Drag-and-Drop implementation.
997 * Color Names:: Getting the definitions of color names.
998 * Text Terminal Colors:: Defining colors for text terminals.
999 * Resources:: Getting resource values from the server.
1000 * Display Feature Testing:: Determining the features of a terminal.
1001
1002 Frame Parameters
1003
1004 * Parameter Access:: How to change a frame's parameters.
1005 * Initial Parameters:: Specifying frame parameters when you make a frame.
1006 * Window Frame Parameters:: List of frame parameters for window systems.
1007 * Size and Position:: Changing the size and position of a frame.
1008 * Geometry:: Parsing geometry specifications.
1009
1010 Window Frame Parameters
1011
1012 * Basic Parameters:: Parameters that are fundamental.
1013 * Position Parameters:: The position of the frame on the screen.
1014 * Size Parameters:: Frame's size.
1015 * Layout Parameters:: Size of parts of the frame, and
1016 enabling or disabling some parts.
1017 * Buffer Parameters:: Which buffers have been or should be shown.
1018 * Management Parameters:: Communicating with the window manager.
1019 * Cursor Parameters:: Controlling the cursor appearance.
1020 * Font and Color Parameters:: Fonts and colors for the frame text.
1021
1022 Positions
1023
1024 * Point:: The special position where editing takes place.
1025 * Motion:: Changing point.
1026 * Excursions:: Temporary motion and buffer changes.
1027 * Narrowing:: Restricting editing to a portion of the buffer.
1028
1029 Motion
1030
1031 * Character Motion:: Moving in terms of characters.
1032 * Word Motion:: Moving in terms of words.
1033 * Buffer End Motion:: Moving to the beginning or end of the buffer.
1034 * Text Lines:: Moving in terms of lines of text.
1035 * Screen Lines:: Moving in terms of lines as displayed.
1036 * List Motion:: Moving by parsing lists and sexps.
1037 * Skipping Characters:: Skipping characters belonging to a certain set.
1038
1039 Markers
1040
1041 * Overview of Markers:: The components of a marker, and how it relocates.
1042 * Predicates on Markers:: Testing whether an object is a marker.
1043 * Creating Markers:: Making empty markers or markers at certain places.
1044 * Information from Markers::Finding the marker's buffer or character position.
1045 * Marker Insertion Types:: Two ways a marker can relocate when you
1046 insert where it points.
1047 * Moving Markers:: Moving the marker to a new buffer or position.
1048 * The Mark:: How "the mark" is implemented with a marker.
1049 * The Region:: How to access "the region".
1050
1051 Text
1052
1053 * Near Point:: Examining text in the vicinity of point.
1054 * Buffer Contents:: Examining text in a general fashion.
1055 * Comparing Text:: Comparing substrings of buffers.
1056 * Insertion:: Adding new text to a buffer.
1057 * Commands for Insertion:: User-level commands to insert text.
1058 * Deletion:: Removing text from a buffer.
1059 * User-Level Deletion:: User-level commands to delete text.
1060 * The Kill Ring:: Where removed text sometimes is saved for
1061 later use.
1062 * Undo:: Undoing changes to the text of a buffer.
1063 * Maintaining Undo:: How to enable and disable undo information.
1064 How to control how much information is kept.
1065 * Filling:: Functions for explicit filling.
1066 * Margins:: How to specify margins for filling commands.
1067 * Adaptive Fill:: Adaptive Fill mode chooses a fill prefix
1068 from context.
1069 * Auto Filling:: How auto-fill mode is implemented to break lines.
1070 * Sorting:: Functions for sorting parts of the buffer.
1071 * Columns:: Computing horizontal positions, and using them.
1072 * Indentation:: Functions to insert or adjust indentation.
1073 * Case Changes:: Case conversion of parts of the buffer.
1074 * Text Properties:: Assigning Lisp property lists to text characters.
1075 * Substitution:: Replacing a given character wherever it appears.
1076 * Transposition:: Swapping two portions of a buffer.
1077 * Registers:: How registers are implemented. Accessing
1078 the text or position stored in a register.
1079 * Base 64:: Conversion to or from base 64 encoding.
1080 * Checksum/Hash:: Computing cryptographic hashes.
1081 * Parsing HTML/XML:: Parsing HTML and XML.
1082 * Atomic Changes:: Installing several buffer changes "atomically".
1083 * Change Hooks:: Supplying functions to be run when text is changed.
1084
1085 The Kill Ring
1086
1087 * Kill Ring Concepts:: What text looks like in the kill ring.
1088 * Kill Functions:: Functions that kill text.
1089 * Yanking:: How yanking is done.
1090 * Yank Commands:: Commands that access the kill ring.
1091 * Low-Level Kill Ring:: Functions and variables for kill ring access.
1092 * Internals of Kill Ring:: Variables that hold kill ring data.
1093
1094 Indentation
1095
1096 * Primitive Indent:: Functions used to count and insert indentation.
1097 * Mode-Specific Indent:: Customize indentation for different modes.
1098 * Region Indent:: Indent all the lines in a region.
1099 * Relative Indent:: Indent the current line based on previous lines.
1100 * Indent Tabs:: Adjustable, typewriter-like tab stops.
1101 * Motion by Indent:: Move to first non-blank character.
1102
1103 Text Properties
1104
1105 * Examining Properties:: Looking at the properties of one character.
1106 * Changing Properties:: Setting the properties of a range of text.
1107 * Property Search:: Searching for where a property changes value.
1108 * Special Properties:: Particular properties with special meanings.
1109 * Format Properties:: Properties for representing formatting of text.
1110 * Sticky Properties:: How inserted text gets properties from
1111 neighboring text.
1112 * Lazy Properties:: Computing text properties in a lazy fashion
1113 only when text is examined.
1114 * Clickable Text:: Using text properties to make regions of text
1115 do something when you click on them.
1116 * Fields:: The @code{field} property defines
1117 fields within the buffer.
1118 * Not Intervals:: Why text properties do not use
1119 Lisp-visible text intervals.
1120
1121 Non-@acronym{ASCII} Characters
1122
1123 * Text Representations:: How Emacs represents text.
1124 * Converting Representations:: Converting unibyte to multibyte and vice versa.
1125 * Selecting a Representation:: Treating a byte sequence as unibyte or multi.
1126 * Character Codes:: How unibyte and multibyte relate to
1127 codes of individual characters.
1128 * Character Properties:: Character attributes that define their
1129 behavior and handling.
1130 * Character Sets:: The space of possible character codes
1131 is divided into various character sets.
1132 * Scanning Charsets:: Which character sets are used in a buffer?
1133 * Translation of Characters:: Translation tables are used for conversion.
1134 * Coding Systems:: Coding systems are conversions for saving files.
1135 * Input Methods:: Input methods allow users to enter various
1136 non-ASCII characters without special keyboards.
1137 * Locales:: Interacting with the POSIX locale.
1138
1139 Coding Systems
1140
1141 * Coding System Basics:: Basic concepts.
1142 * Encoding and I/O:: How file I/O functions handle coding systems.
1143 * Lisp and Coding Systems:: Functions to operate on coding system names.
1144 * User-Chosen Coding Systems:: Asking the user to choose a coding system.
1145 * Default Coding Systems:: Controlling the default choices.
1146 * Specifying Coding Systems:: Requesting a particular coding system
1147 for a single file operation.
1148 * Explicit Encoding:: Encoding or decoding text without doing I/O.
1149 * Terminal I/O Encoding:: Use of encoding for terminal I/O.
1150 * MS-DOS File Types:: How DOS "text" and "binary" files
1151 relate to coding systems.
1152
1153 Searching and Matching
1154
1155 * String Search:: Search for an exact match.
1156 * Searching and Case:: Case-independent or case-significant searching.
1157 * Regular Expressions:: Describing classes of strings.
1158 * Regexp Search:: Searching for a match for a regexp.
1159 * POSIX Regexps:: Searching POSIX-style for the longest match.
1160 * Match Data:: Finding out which part of the text matched,
1161 after a string or regexp search.
1162 * Search and Replace:: Commands that loop, searching and replacing.
1163 * Standard Regexps:: Useful regexps for finding sentences, pages,...
1164
1165 Regular Expressions
1166
1167 * Syntax of Regexps:: Rules for writing regular expressions.
1168 * Regexp Example:: Illustrates regular expression syntax.
1169 * Regexp Functions:: Functions for operating on regular expressions.
1170
1171 Syntax of Regular Expressions
1172
1173 * Regexp Special:: Special characters in regular expressions.
1174 * Char Classes:: Character classes used in regular expressions.
1175 * Regexp Backslash:: Backslash-sequences in regular expressions.
1176
1177 The Match Data
1178
1179 * Replacing Match:: Replacing a substring that was matched.
1180 * Simple Match Data:: Accessing single items of match data,
1181 such as where a particular subexpression started.
1182 * Entire Match Data:: Accessing the entire match data at once, as a list.
1183 * Saving Match Data:: Saving and restoring the match data.
1184
1185 Syntax Tables
1186
1187 * Syntax Basics:: Basic concepts of syntax tables.
1188 * Syntax Descriptors:: How characters are classified.
1189 * Syntax Table Functions:: How to create, examine and alter syntax tables.
1190 * Syntax Properties:: Overriding syntax with text properties.
1191 * Motion and Syntax:: Moving over characters with certain syntaxes.
1192 * Parsing Expressions:: Parsing balanced expressions
1193 using the syntax table.
1194 * Standard Syntax Tables:: Syntax tables used by various major modes.
1195 * Syntax Table Internals:: How syntax table information is stored.
1196 * Categories:: Another way of classifying character syntax.
1197
1198 Syntax Descriptors
1199
1200 * Syntax Class Table:: Table of syntax classes.
1201 * Syntax Flags:: Additional flags each character can have.
1202
1203 Parsing Expressions
1204
1205 * Motion via Parsing:: Motion functions that work by parsing.
1206 * Position Parse:: Determining the syntactic state of a position.
1207 * Parser State:: How Emacs represents a syntactic state.
1208 * Low-Level Parsing:: Parsing across a specified region.
1209 * Control Parsing:: Parameters that affect parsing.
1210
1211 Abbrevs and Abbrev Expansion
1212
1213 * Abbrev Tables:: Creating and working with abbrev tables.
1214 * Defining Abbrevs:: Specifying abbreviations and their expansions.
1215 * Abbrev Files:: Saving abbrevs in files.
1216 * Abbrev Expansion:: Controlling expansion; expansion subroutines.
1217 * Standard Abbrev Tables:: Abbrev tables used by various major modes.
1218 * Abbrev Properties:: How to read and set abbrev properties.
1219 Which properties have which effect.
1220 * Abbrev Table Properties:: How to read and set abbrev table properties.
1221 Which properties have which effect.
1222
1223 Processes
1224
1225 * Subprocess Creation:: Functions that start subprocesses.
1226 * Shell Arguments:: Quoting an argument to pass it to a shell.
1227 * Synchronous Processes:: Details of using synchronous subprocesses.
1228 * Asynchronous Processes:: Starting up an asynchronous subprocess.
1229 * Deleting Processes:: Eliminating an asynchronous subprocess.
1230 * Process Information:: Accessing run-status and other attributes.
1231 * Input to Processes:: Sending input to an asynchronous subprocess.
1232 * Signals to Processes:: Stopping, continuing or interrupting
1233 an asynchronous subprocess.
1234 * Output from Processes:: Collecting output from an asynchronous subprocess.
1235 * Sentinels:: Sentinels run when process run-status changes.
1236 * Query Before Exit:: Whether to query if exiting will kill a process.
1237 * System Processes:: Accessing other processes running on your system.
1238 * Transaction Queues:: Transaction-based communication with subprocesses.
1239 * Network:: Opening network connections.
1240 * Network Servers:: Network servers let Emacs accept net connections.
1241 * Datagrams:: UDP network connections.
1242 * Low-Level Network:: Lower-level but more general function
1243 to create connections and servers.
1244 * Misc Network:: Additional relevant functions for net connections.
1245 * Serial Ports:: Communicating with serial ports.
1246 * Byte Packing:: Using bindat to pack and unpack binary data.
1247
1248 Receiving Output from Processes
1249
1250 * Process Buffers:: If no filter, output is put in a buffer.
1251 * Filter Functions:: Filter functions accept output from the process.
1252 * Decoding Output:: Filters can get unibyte or multibyte strings.
1253 * Accepting Output:: How to wait until process output arrives.
1254
1255 Low-Level Network Access
1256
1257 * Network Processes:: Using @code{make-network-process}.
1258 * Network Options:: Further control over network connections.
1259 * Network Feature Testing:: Determining which network features work on
1260 the machine you are using.
1261
1262 Packing and Unpacking Byte Arrays
1263
1264 * Bindat Spec:: Describing data layout.
1265 * Bindat Functions:: Doing the unpacking and packing.
1266 * Bindat Examples:: Samples of what bindat.el can do for you!
1267
1268 Emacs Display
1269
1270 * Refresh Screen:: Clearing the screen and redrawing everything on it.
1271 * Forcing Redisplay:: Forcing redisplay.
1272 * Truncation:: Folding or wrapping long text lines.
1273 * The Echo Area:: Displaying messages at the bottom of the screen.
1274 * Warnings:: Displaying warning messages for the user.
1275 * Invisible Text:: Hiding part of the buffer text.
1276 * Selective Display:: Hiding part of the buffer text (the old way).
1277 * Temporary Displays:: Displays that go away automatically.
1278 * Overlays:: Use overlays to highlight parts of the buffer.
1279 * Width:: How wide a character or string is on the screen.
1280 * Line Height:: Controlling the height of lines.
1281 * Faces:: A face defines a graphics style
1282 for text characters: font, colors, etc.
1283 * Fringes:: Controlling window fringes.
1284 * Scroll Bars:: Controlling vertical scroll bars.
1285 * Display Property:: Enabling special display features.
1286 * Images:: Displaying images in Emacs buffers.
1287 * Buttons:: Adding clickable buttons to Emacs buffers.
1288 * Abstract Display:: Emacs's Widget for Object Collections.
1289 * Blinking:: How Emacs shows the matching open parenthesis.
1290 * Character Display:: How Emacs displays individual characters.
1291 * Beeping:: Audible signal to the user.
1292 * Window Systems:: Which window system is being used.
1293 * Bidirectional Display:: Display of bidirectional scripts, such as
1294 Arabic and Farsi.
1295
1296 The Echo Area
1297
1298 * Displaying Messages:: Explicitly displaying text in the echo area.
1299 * Progress:: Informing user about progress of a long operation.
1300 * Logging Messages:: Echo area messages are logged for the user.
1301 * Echo Area Customization:: Controlling the echo area.
1302
1303 Reporting Warnings
1304
1305 * Warning Basics:: Warnings concepts and functions to report them.
1306 * Warning Variables:: Variables programs bind to customize
1307 their warnings.
1308 * Warning Options:: Variables users set to control display of warnings.
1309 * Delayed Warnings:: Deferring a warning until the end of a command.
1310
1311 Overlays
1312
1313 * Managing Overlays:: Creating and moving overlays.
1314 * Overlay Properties:: How to read and set properties.
1315 What properties do to the screen display.
1316 * Finding Overlays:: Searching for overlays.
1317
1318 Faces
1319
1320 * Defining Faces:: How to define a face.
1321 * Face Attributes:: What is in a face?
1322 * Attribute Functions:: Functions to examine and set face attributes.
1323 * Displaying Faces:: How Emacs combines the faces specified for
1324 a character.
1325 * Face Remapping:: Remapping faces to alternative definitions.
1326 * Face Functions:: How to define and examine faces.
1327 * Auto Faces:: Hook for automatic face assignment.
1328 * Basic Faces:: Faces that are defined by default.
1329 * Font Selection:: Finding the best available font for a face.
1330 * Font Lookup:: Looking up the names of available fonts
1331 and information about them.
1332 * Fontsets:: A fontset is a collection of fonts
1333 that handle a range of character sets.
1334 * Low-Level Font:: Lisp representation for character display fonts.
1335
1336 Fringes
1337
1338 * Fringe Size/Pos:: Specifying where to put the window fringes.
1339 * Fringe Indicators:: Displaying indicator icons in the window fringes.
1340 * Fringe Cursors:: Displaying cursors in the right fringe.
1341 * Fringe Bitmaps:: Specifying bitmaps for fringe indicators.
1342 * Customizing Bitmaps:: Specifying your own bitmaps to use in the fringes.
1343 * Overlay Arrow:: Display of an arrow to indicate position.
1344
1345 The @code{display} Property
1346
1347 * Replacing Specs:: Display specs that replace the text.
1348 * Specified Space:: Displaying one space with a specified width.
1349 * Pixel Specification:: Specifying space width or height in pixels.
1350 * Other Display Specs:: Displaying an image; adjusting the height,
1351 spacing, and other properties of text.
1352 * Display Margins:: Displaying text or images to the side of
1353 the main text.
1354
1355 Images
1356
1357 * Image Formats:: Supported image formats.
1358 * Image Descriptors:: How to specify an image for use in @code{:display}.
1359 * XBM Images:: Special features for XBM format.
1360 * XPM Images:: Special features for XPM format.
1361 * GIF Images:: Special features for GIF format.
1362 * TIFF Images:: Special features for TIFF format.
1363 * PostScript Images:: Special features for PostScript format.
1364 * ImageMagick Images:: Special features available through ImageMagick.
1365 * Other Image Types:: Various other formats are supported.
1366 * Defining Images:: Convenient ways to define an image for later use.
1367 * Showing Images:: Convenient ways to display an image once
1368 it is defined.
1369 * Animated Images:: Some image formats can be animated.
1370 * Image Cache:: Internal mechanisms of image display.
1371
1372 Buttons
1373
1374 * Button Properties:: Button properties with special meanings.
1375 * Button Types:: Defining common properties for classes of buttons.
1376 * Making Buttons:: Adding buttons to Emacs buffers.
1377 * Manipulating Buttons:: Getting and setting properties of buttons.
1378 * Button Buffer Commands:: Buffer-wide commands and bindings for buttons.
1379
1380 Abstract Display
1381
1382 * Abstract Display Functions:: Functions in the Ewoc package.
1383 * Abstract Display Example:: Example of using Ewoc.
1384
1385 Character Display
1386
1387 * Usual Display:: The usual conventions for displaying characters.
1388 * Display Tables:: What a display table consists of.
1389 * Active Display Table:: How Emacs selects a display table to use.
1390 * Glyphs:: How to define a glyph, and what glyphs mean.
1391 * Glyphless Chars:: How glyphless characters are drawn.
1392
1393 Operating System Interface
1394
1395 * Starting Up:: Customizing Emacs startup processing.
1396 * Getting Out:: How exiting works (permanent or temporary).
1397 * System Environment:: Distinguish the name and kind of system.
1398 * User Identification:: Finding the name and user id of the user.
1399 * Time of Day:: Getting the current time.
1400 * Time Conversion:: Converting a time from numeric form to
1401 calendrical data and vice versa.
1402 * Time Parsing:: Converting a time from numeric form to text
1403 and vice versa.
1404 * Processor Run Time:: Getting the run time used by Emacs.
1405 * Time Calculations:: Adding, subtracting, comparing times, etc.
1406 * Timers:: Setting a timer to call a function at a
1407 certain time.
1408 * Idle Timers:: Setting a timer to call a function when Emacs has
1409 been idle for a certain length of time.
1410 * Terminal Input:: Accessing and recording terminal input.
1411 * Terminal Output:: Controlling and recording terminal output.
1412 * Sound Output:: Playing sounds on the computer's speaker.
1413 * X11 Keysyms:: Operating on key symbols for X Windows.
1414 * Batch Mode:: Running Emacs without terminal interaction.
1415 * Session Management:: Saving and restoring state with
1416 X Session Management.
1417 * Notifications:: Desktop notifications.
1418 * Dynamic Libraries:: On-demand loading of support libraries.
1419
1420 Starting Up Emacs
1421
1422 * Startup Summary:: Sequence of actions Emacs performs at startup.
1423 * Init File:: Details on reading the init file.
1424 * Terminal-Specific:: How the terminal-specific Lisp file is read.
1425 * Command-Line Arguments:: How command-line arguments are processed,
1426 and how you can customize them.
1427
1428 Getting Out of Emacs
1429
1430 * Killing Emacs:: Exiting Emacs irreversibly.
1431 * Suspending Emacs:: Exiting Emacs reversibly.
1432
1433 Terminal Input
1434
1435 * Input Modes:: Options for how input is processed.
1436 * Recording Input:: Saving histories of recent or all input events.
1437
1438 Preparing Lisp code for distribution
1439
1440 * Packaging Basics:: The basic concepts of Emacs Lisp packages.
1441 * Simple Packages:: How to package a single .el file.
1442 * Multi-file Packages:: How to package multiple files.
1443 * Package Archives:: Maintaining package archives.
1444
1445 Tips and Conventions
1446
1447 * Coding Conventions:: Conventions for clean and robust programs.
1448 * Key Binding Conventions:: Which keys should be bound by which programs.
1449 * Programming Tips:: Making Emacs code fit smoothly in Emacs.
1450 * Compilation Tips:: Making compiled code run fast.
1451 * Warning Tips:: Turning off compiler warnings.
1452 * Documentation Tips:: Writing readable documentation strings.
1453 * Comment Tips:: Conventions for writing comments.
1454 * Library Headers:: Standard headers for library packages.
1455
1456 GNU Emacs Internals
1457
1458 * Building Emacs:: How the dumped Emacs is made.
1459 * Pure Storage:: Kludge to make preloaded Lisp functions shareable.
1460 * Garbage Collection:: Reclaiming space for Lisp objects no longer used.
1461 * Memory Usage:: Info about total size of Lisp objects made so far.
1462 * Writing Emacs Primitives:: Writing C code for Emacs.
1463 * Object Internals:: Data formats of buffers, windows, processes.
1464
1465 Object Internals
1466
1467 * Buffer Internals:: Components of a buffer structure.
1468 * Window Internals:: Components of a window structure.
1469 * Process Internals:: Components of a process structure.
1470 @end detailmenu
1471 @end menu
1472
1473 @include intro.texi
1474 @include objects.texi
1475 @include numbers.texi
1476 @include strings.texi
1477
1478 @include lists.texi
1479 @include sequences.texi
1480 @include hash.texi
1481 @include symbols.texi
1482 @include eval.texi
1483
1484 @include control.texi
1485 @include variables.texi
1486 @include functions.texi
1487 @include macros.texi
1488
1489 @include customize.texi
1490 @include loading.texi
1491 @include compile.texi
1492 @include advice.texi
1493
1494 @c This includes edebug.texi.
1495 @include debugging.texi
1496 @include streams.texi
1497 @include minibuf.texi
1498 @include commands.texi
1499
1500 @include keymaps.texi
1501 @include modes.texi
1502 @include help.texi
1503 @include files.texi
1504
1505 @include backups.texi
1506 @include buffers.texi
1507 @include windows.texi
1508 @include frames.texi
1509
1510 @include positions.texi
1511 @include markers.texi
1512 @include text.texi
1513 @include nonascii.texi
1514
1515 @include searching.texi
1516 @include syntax.texi
1517 @include abbrevs.texi
1518 @include processes.texi
1519
1520 @include display.texi
1521 @include os.texi
1522
1523 @include package.texi
1524
1525 @c MOVE to Emacs Manual: include misc-modes.texi
1526
1527 @c appendices
1528
1529 @c REMOVE this: include non-hacker.texi
1530
1531 @include anti.texi
1532 @include doclicense.texi
1533 @include gpl.texi
1534 @include tips.texi
1535 @include internals.texi
1536 @include errors.texi
1537 @include maps.texi
1538 @include hooks.texi
1539
1540 @include index.texi
1541
1542 @ignore
1543 @node New Symbols, , Index, Top
1544 @unnumbered New Symbols Since the Previous Edition
1545
1546 @printindex tp
1547 @end ignore
1548
1549 @bye
1550
1551 \f
1552 These words prevent "local variables" above from confusing Emacs.