-This is Info file ../../info/lispref.info, produced by Makeinfo version
-1.68 from the input file lispref.texi.
+This is ../info/lispref.info, produced by makeinfo version 4.0 from
+lispref/lispref.texi.
INFO-DIR-SECTION XEmacs Editor
START-INFO-DIR-ENTRY
An `end-of-file' error is signaled if reading encounters an
unterminated list, vector, or string.
- - Function: read &optional STREAM
+ - Function: read &optional stream
This function reads one textual Lisp expression from STREAM,
returning it as a Lisp object. This is the basic Lisp input
function.
- - Function: read-from-string STRING &optional START END
+ - Function: read-from-string string &optional start end
This function reads the first textual Lisp expression from the
text in STRING. It returns a cons cell whose CAR is that
expression, and whose CDR is an integer giving the position of the
Finally, we show the use of a function as an output stream. The
function `eat-output' takes each character that it is given and conses
-it onto the front of the list `last-output' (*note Building Lists::.).
+it onto the front of the list `last-output' (*note Building Lists::).
At the end, the list contains all the characters output, but in reverse
order.
the previous section for a description of output streams.) If STREAM
is `nil' or omitted, it defaults to the value of `standard-output'.
- - Function: print OBJECT &optional STREAM
+ - Function: print object &optional stream
The `print' function is a convenient way of printing. It outputs
the printed representation of OBJECT to STREAM, printing in
addition one newline before OBJECT and another after it. Quoting
-|
=> " came back"
- - Function: prin1 OBJECT &optional STREAM
+ - Function: prin1 object &optional stream
This function outputs the printed representation of OBJECT to
STREAM. It does not print newlines to separate output as `print'
does, but it does use quoting characters just like `print'. It
-| The\ cat\ in"the hat"" came back"
=> " came back"
- - Function: princ OBJECT &optional STREAM
+ - Function: princ object &optional stream
This function outputs the printed representation of OBJECT to
STREAM. It returns OBJECT.
-| The cat in the "hat"
=> " in the \"hat\""
- - Function: terpri &optional STREAM
+ - Function: terpri &optional stream
This function outputs a newline to STREAM. The name stands for
"terminate print".
- - Function: write-char CHARACTER &optional STREAM
+ - Function: write-char character &optional stream
This function outputs CHARACTER to STREAM. It returns CHARACTER.
- - Function: prin1-to-string OBJECT &optional NOESCAPE
+ - Function: prin1-to-string object &optional noescape
This function returns a string containing the text that `prin1'
would have printed for the same argument.
objects will be written in `#[...]' form instead of in
`#<compiled-function [...]>' form, and two-element lists of the
form `(quote object)' will be written as the equivalent `'object'.
- Do not *set* this variable; bind it instead.
+ Do not _set_ this variable; bind it instead.
- Variable: print-length
The value of this variable is the maximum number of elements of a
* Completion:: How to invoke and customize completion.
* Yes-or-No Queries:: Asking a question with a simple answer.
* Multiple Queries:: Asking a series of similar questions.
+* Reading a Password:: Reading a password from the terminal.
* Minibuffer Misc:: Various customization hooks and variables.
\1f
===========================
In most ways, a minibuffer is a normal XEmacs buffer. Most
-operations *within* a buffer, such as editing commands, work normally
+operations _within_ a buffer, such as editing commands, work normally
in a minibuffer. However, many operations for managing buffers do not
apply to minibuffers. The name of a minibuffer always has the form
` *Minibuf-NUMBER', and it cannot be changed. Minibuffers are
displayed only in special windows used only for minibuffers; these
-windows always appear at the bottom of a frame. (Sometime frames have
+windows always appear at the bottom of a frame. (Sometimes frames have
no minibuffer window, and sometimes a special kind of frame contains
nothing but a minibuffer window; see *Note Minibuffers and Frames::.)
`enable-recursive-minibuffers'.
Like other buffers, a minibuffer may use any of several local keymaps
-(*note Keymaps::.); these contain various exit commands and in some
-cases completion commands (*note Completion::.).
+(*note Keymaps::); these contain various exit commands and in some cases
+completion commands (*note Completion::).
* `minibuffer-local-map' is for ordinary input (no completion).
- * `minibuffer-local-ns-map' is similar, except that <SPC> exits just
- like <RET>. This is used mainly for Mocklisp compatibility.
-
* `minibuffer-local-completion-map' is for permissive completion.
* `minibuffer-local-must-match-map' is for strict completion and for
reading the arguments for a command, in the `interactive' spec. *Note
Defining Commands::.
- - Function: read-from-minibuffer PROMPT-STRING &optional
- INITIAL-CONTENTS KEYMAP READ HIST
+ - Function: read-from-minibuffer prompt-string &optional
+ initial-contents keymap read hist abbrev-table default
This function is the most general way to get input through the
minibuffer. By default, it accepts arbitrary text and returns it
as a string; however, if READ is non-`nil', then it uses `read' to
- convert the text into a Lisp object (*note Input Functions::.).
+ convert the text into a Lisp object (*note Input Functions::).
The first thing this function does is to activate a minibuffer and
display it with PROMPT-STRING as the prompt. This value must be a
minibuffer but put point POSITION characters from the beginning,
rather than at the end.
+ When the user types a command to exit the minibuffer,
+ `read-from-minibuffer' constructs the return value from the text in
+ the minibuffer. Normally it returns a string containing that text.
+ However, if READ is non-`nil', `read-from-minibuffer' reads the
+ text and returns the resulting Lisp object, unevaluated. (*Note
+ Input Functions::, for information about reading.)
+
+ The argument DEFAULT specifies a default value to make available
+ through the history commands. It should be a string, or `nil'.
+
If KEYMAP is non-`nil', that keymap is the local keymap to use in
the minibuffer. If KEYMAP is omitted or `nil', the value of
`minibuffer-local-map' is used as the keymap. Specifying a keymap
is the most important way to customize the minibuffer for various
applications such as completion.
+ The argument ABBREV-TABLE specifies `local-abbrev-table' in the
+ minibuffer (*note Standard Abbrev Tables::).
+
The argument HIST specifies which history list variable to use for
saving the input and for history commands used in the minibuffer.
It defaults to `minibuffer-history'. *Note Minibuffer History::.
reads the text and returns the resulting Lisp object, unevaluated.
(*Note Input Functions::, for information about reading.)
- - Function: read-string PROMPT &optional INITIAL
+ *Usage note:* The INITIAL-CONTENTS argument and the DEFAULT
+ argument are two alternative features for more or less the same
+ job. It does not make sense to use both features in a single call
+ to `read-from-minibuffer'. In general, we recommend using
+ DEFAULT, since this permits the user to insert the default value
+ when it is wanted, but does not burden the user with deleting it
+ from the minibuffer on other occasions. However, if user is
+ supposed to edit default value, INITIAL-CONTENTS may be preferred.
+
+ - Function: read-string prompt &optional initial history
This function reads a string from the minibuffer and returns it.
The arguments PROMPT and INITIAL are used as in
`read-from-minibuffer'. The keymap used is `minibuffer-local-map'.
- This is a simplified interface to the `read-from-minibuffer'
- function:
+ The optional argument HISTORY, if non-nil, specifies a history
+ list and optionally the initial position in the list.
+
+ This function is a simplified interface to the
+ `read-from-minibuffer' function:
(read-string PROMPT INITIAL)
==
This is the default local keymap for reading from the minibuffer.
By default, it makes the following bindings:
- <LFD>
+ `C-j'
`exit-minibuffer'
<RET>
`M-s'
`previous-matching-history-element'
- - Function: read-no-blanks-input PROMPT &optional INITIAL
- This function reads a string from the minibuffer, but does not
- allow whitespace characters as part of the input: instead, those
- characters terminate the input. The arguments PROMPT and INITIAL
- are used as in `read-from-minibuffer'.
-
- This is a simplified interface to the `read-from-minibuffer'
- function, and passes the value of the `minibuffer-local-ns-map'
- keymap as the KEYMAP argument for that function. Since the keymap
- `minibuffer-local-ns-map' does not rebind `C-q', it *is* possible
- to put a space into the string, by quoting it.
-
- (read-no-blanks-input PROMPT INITIAL)
- ==
- (read-from-minibuffer PROMPT INITIAL minibuffer-local-ns-map)
-
- - Variable: minibuffer-local-ns-map
- This built-in variable is the keymap used as the minibuffer local
- keymap in the function `read-no-blanks-input'. By default, it
- makes the following bindings, in addition to those of
- `minibuffer-local-map':
-
- <SPC>
- `exit-minibuffer'
-
- <TAB>
- `exit-minibuffer'
-
- `?'
- `self-insert-and-exit'
-
\1f
File: lispref.info, Node: Object from Minibuffer, Next: Minibuffer History, Prev: Text from Minibuffer, Up: Minibuffers
This section describes functions for reading Lisp objects with the
minibuffer.
- - Function: read-minibuffer PROMPT &optional INITIAL
- This function reads a Lisp object in the minibuffer and returns it,
- without evaluating it. The arguments PROMPT and INITIAL are used
- as in `read-from-minibuffer'.
+ - Function: read-minibuffer prompt &optional initial
+ This function reads a Lisp object using the minibuffer, and
+ returns it without evaluating it. The arguments PROMPT and
+ INITIAL are used as in `read-from-minibuffer'.
This is a simplified interface to the `read-from-minibuffer'
function:
"Enter an expression: " (format "%s" '(testing)))
;; Here is how the minibuffer is displayed:
-
+
---------- Buffer: Minibuffer ----------
Enter an expression: (testing)-!-
---------- Buffer: Minibuffer ----------
The user can type <RET> immediately to use the initial input as a
default, or can edit the input.
- - Function: eval-minibuffer PROMPT &optional INITIAL
- This function reads a Lisp expression in the minibuffer, evaluates
- it, then returns the result. The arguments PROMPT and INITIAL are
- used as in `read-from-minibuffer'.
+ - Function: eval-minibuffer prompt &optional initial
+ This function reads a Lisp expression using the minibuffer,
+ evaluates it, then returns the result. The arguments PROMPT and
+ INITIAL are used as in `read-from-minibuffer'.
This function simply evaluates the result of a call to
`read-minibuffer':
==
(eval (read-minibuffer PROMPT INITIAL))
- - Function: edit-and-eval-command PROMPT FORM
+ - Function: edit-and-eval-command prompt form
This function reads a Lisp expression in the minibuffer, and then
evaluates it. The difference between this command and
`eval-minibuffer' is that here the initial FORM is not optional
The first thing `edit-and-eval-command' does is to activate the
minibuffer with PROMPT as the prompt. Then it inserts the printed
- representation of FORM in the minibuffer, and lets the user edit.
- When the user exits the minibuffer, the edited text is read with
- `read' and then evaluated. The resulting value becomes the value
- of `edit-and-eval-command'.
+ representation of FORM in the minibuffer, and lets the user edit
+ it. When the user exits the minibuffer, the edited text is read
+ with `read' and then evaluated. The resulting value becomes the
+ value of `edit-and-eval-command'.
In the following example, we offer the user an expression with
initial text which is a valid form already:
;; After evaluation of the preceding expression,
;; the following appears in the minibuffer:
-
+
---------- Buffer: Minibuffer ----------
Please edit: (forward-word 1)-!-
---------- Buffer: Minibuffer ----------
the input functions when you wish. But it is safe to modify the list
by hand when the minibuffer input functions are not using it.
+ Here are some of the standard minibuffer history list variables:
+
- Variable: minibuffer-history
The default history list for minibuffer history input.
chapter so as to keep them near the higher-level completion features
that do use the minibuffer.
- - Function: try-completion STRING COLLECTION &optional PREDICATE
+ - Function: try-completion string collection &optional predicate
This function returns the longest common substring of all possible
completions of STRING in COLLECTION. The value of COLLECTION must
be an alist, an obarray, or a function that implements a virtual
longest initial sequence common to all the permissible completions
that match.
- If COLLECTION is an alist (*note Association Lists::.), the CARs
- of the alist elements form the set of permissible completions.
+ If COLLECTION is an alist (*note Association Lists::), the CARs of
+ the alist elements form the set of permissible completions.
- If COLLECTION is an obarray (*note Creating Symbols::.), the names
+ If COLLECTION is an obarray (*note Creating Symbols::), the names
of all symbols in the obarray form the set of permissible
completions. The global variable `obarray' holds an obarray
containing the names of all interned Lisp symbols.
of one argument. It is used to test each possible match, and the
match is accepted only if PREDICATE returns non-`nil'. The
argument given to PREDICATE is either a cons cell from the alist
- (the CAR of which is a string) or else it is a symbol (*not* a
+ (the CAR of which is a string) or else it is a symbol (_not_ a
symbol name) from the obarray.
You can also use a symbol that is a function as COLLECTION. Then
"foo"
'(("foobar1" 1) ("barfoo" 2) ("foobaz" 3) ("foobar2" 4)))
=> "fooba"
-
+
(try-completion "foo" '(("barfoo" 2) ("foo" 3)))
=> t
(defun test (s)
(> (length (car s)) 6))
=> test
-
(try-completion
"foo"
'(("foobar1" 1) ("barfoo" 2) ("foobaz" 3) ("foobar2" 4))
'test)
=> "foobar"
- - Function: all-completions STRING COLLECTION &optional PREDICATE
- NOSPACE
+ - Function: all-completions string collection &optional predicate
+ nospace
This function returns a list of all possible completions of
- STRING. The parameters to this function are the same as to
+ STRING. The arguments to this function are the same as those of
`try-completion'.
If COLLECTION is a function, it is called with three arguments:
(defun test (s)
(> (length (car s)) 6))
=> test
-
+
(all-completions
"foo"
'(("foobar1" 1) ("barfoo" 2) ("foobaz" 3) ("foobar2" 4))
This section describes the basic interface for reading from the
minibuffer with completion.
- - Function: completing-read PROMPT COLLECTION &optional PREDICATE
- REQUIRE-MATCH INITIAL HIST
+ - Function: completing-read prompt collection &optional predicate
+ require-match initial hist default
This function reads a string in the minibuffer, assisting the user
by providing completion. It activates the minibuffer with prompt
PROMPT, which must be a string. If INITIAL is non-`nil',
COLLECTION. If REQUIRE-MATCH is `nil', the exit commands work
regardless of the input in the minibuffer.
+ However, empty input is always permitted, regardless of the value
+ of REQUIRE-MATCH; in that case, `completing-read' returns DEFAULT.
+ The value of DEFAULT (if non-`nil') is also available to the user
+ through the history commands.
+
The user can exit with null input by typing <RET> with an empty
- minibuffer. Then `completing-read' returns `nil'. This is how
- the user requests whatever default the command uses for the value
- being read. The user can return using <RET> in this way regardless
- of the value of REQUIRE-MATCH.
+ minibuffer. Then `completing-read' returns `""'. This is how the
+ user requests whatever default the command uses for the value being
+ read. The user can return using <RET> in this way regardless of
+ the value of REQUIRE-MATCH, and regardless of whether the empty
+ string is included in COLLECTION.
The function `completing-read' works by calling `read-minibuffer'.
It uses `minibuffer-local-completion-map' as the keymap if
"Complete a foo: "
'(("foobar1" 1) ("barfoo" 2) ("foobaz" 3) ("foobar2" 4))
nil t "fo")
-
+
;; After evaluation of the preceding expression,
;; the following appears in the minibuffer:
`minibuffer-complete'
with other characters bound as in `minibuffer-local-map' (*note
- Text from Minibuffer::.).
+ Text from Minibuffer::).
- Variable: minibuffer-local-must-match-map
`completing-read' uses this value as the local keymap when an
<TAB>
`minibuffer-complete'
- <LFD>
+ `C-j'
`minibuffer-complete-and-exit'
<RET>
- Command: minibuffer-complete-and-exit
This function completes the minibuffer contents, and exits if
confirmation is not required, i.e., if
- `minibuffer-completion-confirm' is non-`nil'. If confirmation
- *is* required, it is given by repeating this command
- immediately--the command is programmed to work without confirmation
- when run twice in succession.
+ `minibuffer-completion-confirm' is `nil'. If confirmation _is_
+ required, it is given by repeating this command immediately--the
+ command is programmed to work without confirmation when run twice
+ in succession.
- Variable: minibuffer-completion-confirm
When the value of this variable is non-`nil', XEmacs asks for
list of completions is displayed as text in a buffer named
`*Completions*'.
- - Function: display-completion-list COMPLETIONS
+ - Function: display-completion-list completions
This function displays COMPLETIONS to the stream in
`standard-output', usually a buffer. (*Note Read and Print::, for
more information about streams.) The argument COMPLETIONS is
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