Document byte-to-string in Lisp manual.

* objects.texi (Symbol Type):
* text.texi (Near Point):
* help.texi (Help Functions):
* functions.texi (Mapping Functions): Use string instead of
char-to-string in examples.

* nonascii.texi (Converting Representations): Document
byte-to-string.

* strings.texi (Creating Strings): Don't mention semi-obsolete
function char-to-string.
(String Conversion): Shorten discussion of semi-obsolete function
string-to-char.  Link to Converting Representations.

7 files changed, 53 insertions, 44 deletions

diff --git a/doc/lispref/ChangeLog b/doc/lispref/ChangeLog
index 2ea15fe3ca..959f4844c1 100644
--- a/doc/lispref/ChangeLog
+++ b/doc/lispref/ChangeLog
@@ -1,3 +1,19 @@
+2010-11-21  Chong Yidong  <[email protected]>
+
+	* nonascii.texi (Converting Representations): Document
+	byte-to-string.
+
+	* strings.texi (Creating Strings): Don't mention semi-obsolete
+	function char-to-string.
+	(String Conversion): Shorten discussion of semi-obsolete function
+	string-to-char.  Link to Converting Representations.
+
+	* objects.texi (Symbol Type):
+	* text.texi (Near Point):
+	* help.texi (Help Functions):
+	* functions.texi (Mapping Functions): Use string instead of
+	char-to-string in examples.
+
 2010-11-20  Chong Yidong  <[email protected]>
 
 	* text.texi (Kill Functions, Kill Functions)
diff --git a/doc/lispref/functions.texi b/doc/lispref/functions.texi
index 6f3fd63013..635245426f 100644
--- a/doc/lispref/functions.texi
+++ b/doc/lispref/functions.texi
@@ -818,7 +818,7 @@ length of @var{sequence}.  For example:
      @result{} (a c e)
 (mapcar '1+ [1 2 3])
      @result{} (2 3 4)
-(mapcar 'char-to-string "abc")
+(mapcar 'string "abc")
      @result{} ("a" "b" "c")
 @end group
 
diff --git a/doc/lispref/help.texi b/doc/lispref/help.texi
index 026258f247..31a4db31dc 100644
--- a/doc/lispref/help.texi
+++ b/doc/lispref/help.texi
@@ -551,7 +551,7 @@ follows:
 
 @smallexample
 @group
-(define-key global-map (char-to-string help-char) 'help-command)
+(define-key global-map (string help-char) 'help-command)
 (fset 'help-command help-map)
 @end group
 @end smallexample
diff --git a/doc/lispref/nonascii.texi b/doc/lispref/nonascii.texi
index dfcb3e4730..f8d98cb1ad 100644
--- a/doc/lispref/nonascii.texi
+++ b/doc/lispref/nonascii.texi
@@ -202,6 +202,13 @@ unibyte string, it is returned unchanged.  Use this function for
 characters.
 @end defun
 
+@defun byte-to-string byte
+@cindex byte to string
+This function returns a unibyte string containing a single byte of
+character data, @var{character}.  It signals a error if
+@var{character} is not an integer between 0 and 255.
+@end defun
+
 @defun multibyte-char-to-unibyte char
 This converts the multibyte character @var{char} to a unibyte
 character, and returns that character.  If @var{char} is neither
diff --git a/doc/lispref/objects.texi b/doc/lispref/objects.texi
index c8ccb15a2d..8f72cc0168 100644
--- a/doc/lispref/objects.texi
+++ b/doc/lispref/objects.texi
@@ -582,7 +582,6 @@ makes it invalid as a number.
 @group
 foo                 ; @r{A symbol named @samp{foo}.}
 FOO                 ; @r{A symbol named @samp{FOO}, different from @samp{foo}.}
-char-to-string      ; @r{A symbol named @samp{char-to-string}.}
 @end group
 @group
 1+                  ; @r{A symbol named @samp{1+}}
diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi
index 1128ca87d8..94d2765a83 100644
--- a/doc/lispref/strings.texi
+++ b/doc/lispref/strings.texi
@@ -126,9 +126,8 @@ This function returns a string made up of @var{count} repetitions of
      @result{} ""
 @end example
 
-  Other functions to compare with this one include @code{char-to-string}
-(@pxref{String Conversion}), @code{make-vector} (@pxref{Vectors}), and
-@code{make-list} (@pxref{Building Lists}).
+  Other functions to compare with this one include @code{make-vector}
+(@pxref{Vectors}) and @code{make-list} (@pxref{Building Lists}).
 @end defun
 
 @defun string &rest characters
@@ -565,38 +564,6 @@ of text characters and general input events
 (@code{single-key-description} and @code{text-char-description}).  These
 are used primarily for making help messages.
 
-@defun char-to-string character
-@cindex character to string
-This function returns a new string containing one character,
-@var{character}.  This function is semi-obsolete because the function
-@code{string} is more general.  @xref{Creating Strings}.
-@end defun
-
-@defun string-to-char string
-@cindex string to character
-  This function returns the first character in @var{string}.  If the
-string is empty, the function returns 0.  The value is also 0 when the
-first character of @var{string} is the null character, @acronym{ASCII} code
-0.
-
-@example
-(string-to-char "ABC")
-     @result{} 65
-
-(string-to-char "xyz")
-     @result{} 120
-(string-to-char "")
-     @result{} 0
-@group
-(string-to-char "\000")
-     @result{} 0
-@end group
-@end example
-
-This function may be eliminated in the future if it does not seem useful
-enough to retain.
-@end defun
-
 @defun number-to-string number
 @cindex integer to string
 @cindex integer to decimal
@@ -659,19 +626,39 @@ this function returns 0.
 @code{string-to-int} is an obsolete alias for this function.
 @end defun
 
+@defun char-to-string character
+@cindex character to string
+This function returns a new string containing one character,
+@var{character}.  This function is semi-obsolete because the function
+@code{string} is more general.  @xref{Creating Strings}.
+@end defun
+
+@defun string-to-char string
+  This function returns the first character in @var{string}.  This
+mostly identical to @code{(aref string 0)}, except that it returns 0
+if the string is empty.  (The value is also 0 when the first character
+of @var{string} is the null character, @acronym{ASCII} code 0.)  This
+function may be eliminated in the future if it does not seem useful
+enough to retain.
+@end defun
+
   Here are some other functions that can convert to or from a string:
 
 @table @code
 @item concat
-@code{concat} can convert a vector or a list into a string.
+This function converts a vector or a list into a string.
 @xref{Creating Strings}.
 
 @item vconcat
-@code{vconcat} can convert a string into a vector.  @xref{Vector
+This function converts a string into a vector.  @xref{Vector
 Functions}.
 
 @item append
-@code{append} can convert a string into a list.  @xref{Building Lists}.
+This function converts a string into a list.  @xref{Building Lists}.
+
+@item byte-to-string
+This function converts a byte of character data into a unibyte string.
+@xref{Converting Representations}.
 @end table
 
 @node Formatting Strings
diff --git a/doc/lispref/text.texi b/doc/lispref/text.texi
index 025bf1b6f8..57bf482588 100644
--- a/doc/lispref/text.texi
+++ b/doc/lispref/text.texi
@@ -86,7 +86,7 @@ buffer is @samp{@@}:
 
 @example
 @group
-(char-to-string (char-after 1))
+(string (char-after 1))
      @result{} "@@"
 @end group
 @end example
@@ -121,9 +121,9 @@ but there is no peace.
 @end group
 
 @group
-(char-to-string (preceding-char))
+(string (preceding-char))
      @result{} "a"
-(char-to-string (following-char))
+(string (following-char))
      @result{} "c"
 @end group
 @end example