@c -*-texinfo-*-
@c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1998, 1999
-@c Free Software Foundation, Inc.
+@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1998, 1999, 2002, 2003, 2004,
+@c 2005, 2006 Free Software Foundation, Inc.
@c See the file elisp.texi for copying conditions.
@setfilename ../info/streams
@node Read and Print, Minibuffers, Debugging, Top
should save the argument and arrange to return it on the next call.
This is called @dfn{unreading} the character; it happens when the Lisp
reader reads one character too many and wants to ``put it back where it
-came from''. In this case, it makes no difference what value
+came from.'' In this case, it makes no difference what value
@var{function} returns.
@end itemize
@defvar standard-input
This variable holds the default input stream---the stream that
@code{read} uses when the @var{stream} argument is @code{nil}.
+The default is @code{t}, meaning use the minibuffer.
@end defvar
@node Output Streams
points into, at the marker position. The marker position advances as
characters are inserted. The value of point in the buffer has no effect
on printing when the stream is a marker, and this kind of printing
-does not move point.
+does not move point (except that if the marker points at or before the
+position of point, point advances with the surrounding text, as
+usual).
@item @var{function}
@cindex function output stream
@print{} "the hat"
@print{}
@print{} " came back"
- @print{}
@result{} " came back"
@end group
@end example
@defun terpri &optional stream
@cindex newline in print
This function outputs a newline to @var{stream}. The name stands
-for ``terminate print''.
+for ``terminate print.''
@end defun
@defun write-char character &optional stream
@end group
@end example
-See @code{format}, in @ref{String Conversion}, for other ways to obtain
+See @code{format}, in @ref{Formatting Strings}, for other ways to obtain
the printed representation of a Lisp object as a string.
@end defun
-@defmac with-output-to-string body...
+@defmac with-output-to-string body@dots{}
This macro executes the @var{body} forms with @code{standard-output} set
up to feed output into a string. Then it returns that string.
@defvar standard-output
The value of this variable is the default output stream---the stream
that print functions use when the @var{stream} argument is @code{nil}.
+The default is @code{t}, meaning display in the echo area.
+@end defvar
+
+@defvar print-quoted
+If this is non-@code{nil}, that means to print quoted forms using
+abbreviated reader syntax. @code{(quote foo)} prints as @code{'foo},
+@code{(function foo)} as @code{#'foo}, and backquoted forms print
+using modern backquote syntax.
@end defvar
@defvar print-escape-newlines
@end defvar
@defvar print-escape-nonascii
-If this variable is non-@code{nil}, then unibyte non-@sc{ascii}
+If this variable is non-@code{nil}, then unibyte non-@acronym{ASCII}
characters in strings are unconditionally printed as backslash sequences
by the print functions @code{prin1} and @code{print} that print with
quoting.
-Those functions also use backslash sequences for unibyte non-@sc{ascii}
+Those functions also use backslash sequences for unibyte non-@acronym{ASCII}
characters, regardless of the value of this variable, when the output
stream is a multibyte buffer or a marker pointing into one.
@end defvar
@defvar print-escape-multibyte
-If this variable is non-@code{nil}, then multibyte non-@sc{ascii}
+If this variable is non-@code{nil}, then multibyte non-@acronym{ASCII}
characters in strings are unconditionally printed as backslash sequences
by the print functions @code{prin1} and @code{print} that print with
quoting.
Those functions also use backslash sequences for multibyte
-non-@sc{ascii} characters, regardless of the value of this variable,
+non-@acronym{ASCII} characters, regardless of the value of this variable,
when the output stream is a unibyte buffer or a marker pointing into
one.
@end defvar
@end defopt
These variables are used for detecting and reporting circular
-and shared structure---but they are only defined in Emacs 21.
+and shared structure:
-@tindex print-circle
@defvar print-circle
If non-@code{nil}, this variable enables detection of circular
and shared structure in printing.
@end defvar
-@tindex print-gensym
@defvar print-gensym
If non-@code{nil}, this variable enables detection of uninterned symbols
(@pxref{Creating Symbols}) in printing. When this is enabled,
the @code{print-circle} feature. You should not use it except
to bind it to @code{nil} when you bind @code{print-continuous-numbering}.
@end defvar
+
+@defvar float-output-format
+This variable specifies how to print floating point numbers. Its
+default value is @code{nil}, meaning use the shortest output
+that represents the number without losing information.
+
+To control output format more precisely, you can put a string in this
+variable. The string should hold a @samp{%}-specification to be used
+in the C function @code{sprintf}. For further restrictions on what
+you can use, see the variable's documentation string.
+@end defvar
+
+@ignore
+ arch-tag: 07636b8c-c4e3-4735-9e06-2e864320b434
+@end ignore