* src/data.c (Fdefalias): Return `symbol'.
* doc/lispref/functions.texi (Defining Functions):
* doc/lispref/macros.texi (Defining Macros): Un-define the return value of
`defun', `defmacro' and `defalias'.
Fixes: debbugs:11686
+2012-06-18 Stefan Monnier <monnier@iro.umontreal.ca>
+
+ * functions.texi (Defining Functions):
+ * macros.texi (Defining Macros): Un-define the return value of `defun',
+ `defmacro' and `defalias'.
+
2012-06-17 Chong Yidong <cyd@gnu.org>
* elisp.texi: Remove urlcolor setting.
@end example
@code{defun} stores this lambda expression in the function cell of
-@var{name}. It returns the value @var{name}, but usually we ignore this
-value.
+@var{name}. Its return value is @emph{undefined}.
As described previously, @var{argument-list} is a list of argument
names and may include the keywords @code{&optional} and @code{&rest}.
@example
@group
(defun foo () 5)
- @result{} foo
-@end group
-@group
(foo)
@result{} 5
@end group
@group
(defun bar (a &optional b &rest c)
(list a b c))
- @result{} bar
-@end group
-@group
(bar 1 2 3 4 5)
@result{} (1 2 (3 4 5))
@end group
(forward-word 1)
(backward-char 1)
(capitalize-word 1))
- @result{} capitalize-backwards
@end group
@end example
@anchor{Definition of defalias}
This special form defines the symbol @var{name} as a function, with
definition @var{definition} (which can be any valid Lisp function).
-It returns @var{definition}.
+Its return value is @emph{undefined}.
If @var{docstring} is non-@code{nil}, it becomes the function
documentation of @var{name}. Otherwise, any documentation provided by
@example
@group
(defun bar (n) (+ n 2))
- @result{} bar
-@end group
-@group
(symbol-function 'bar)
@result{} (lambda (n) (+ n 2))
@end group
@example
@group
(defun foo (x) x)
- @result{} foo
-@end group
-@group
(foo 1)
@result{}1
@end group
@group
(defmacro inc (var)
(list 'setq var (list '1+ var)))
- @result{} inc
@end group
@group
@group
(defmacro inc2 (var1 var2)
(list 'progn (list 'inc var1) (list 'inc var2)))
- @result{} inc2
@end group
@group
@end example
(Note that the @sc{cdr} of this list is a function---a lambda expression.)
-This macro object is stored in the function cell of @var{name}. The
-value returned by evaluating the @code{defmacro} form is @var{name}, but
-usually we ignore this value.
+This macro object is stored in the function cell of @var{name}. Its return
+value is @emph{undefined}.
The shape and meaning of @var{argument-list} is the same as in a
function, and the keywords @code{&rest} and @code{&optional} may be used
(cons (list '<= var final)
(append body (list (list 'inc var)))))))
@end group
-@result{} for
@group
(for i from 1 to 3 do
@group
(defmacro foo (a)
(list 'setq (eval a) t))
- @result{} foo
@end group
@group
(setq x 'b)
\f
* Lisp changes in Emacs 24.2
+** The return value of `defalias' has changed and is now undefined.
+
** `defun' also accepts a (declare DECLS) form, like `defmacro'.
The interpretation of the DECLS is determined by `defun-declarations-alist'.
and the result should be a form to be evaluated instead of the original.
DECL is a declaration, optional, of the form (declare DECLS...) where
DECLS is a list of elements of the form (PROP . VALUES). These are
-interpreted according to `macro-declarations-alist'."
+interpreted according to `macro-declarations-alist'.
+The return value is undefined."
(if (stringp docstring) nil
(if decl (setq body (cons decl body)))
(setq decl docstring)
DECL is a declaration, optional, of the form (declare DECLS...) where
DECLS is a list of elements of the form (PROP . VALUES). These are
interpreted according to `defun-declarations-alist'.
+The return value is undefined.
\(fn NAME ARGLIST &optional DOCSTRING DECL &rest BODY)"
;; We can't just have `decl' as an &optional argument, because we need
+2012-06-18 Stefan Monnier <monnier@iro.umontreal.ca>
+
+ * data.c (Fdefalias): Return `symbol' (bug#11686).
+
2012-06-18 Martin Rudalics <rudalics@gmx.at>
* buffer.c (Fkill_buffer): Don't throw an error when the buffer
- gets killed during executing of this function (Bug#11665). Try
- to always return Qt when the buffer has been actually killed.
+ gets killed during executing of this function (Bug#11665).
+ Try to always return Qt when the buffer has been actually killed.
(Vkill_buffer_query_functions): In doc-string say that functions
run by this hook should not change the current buffer.
(x_draw_glyph_string): Use them.
* xfaces.c (Qline, Qwave): New Lisp objects.
(check_lface_attrs, merge_face_ref)
- (Finternal_set_lisp_face_attribute, realize_x_face): Handle
- wave-style underline face attributes.
+ (Finternal_set_lisp_face_attribute, realize_x_face):
+ Handle wave-style underline face attributes.
* xterm.c (x_draw_underwave): New function.
(x_draw_glyph_string): Use it.
2012-06-16 Eli Zaretskii <eliz@gnu.org>
- * xdisp.c (set_cursor_from_row): Don't dereference glyphs_end. If
- all the glyphs of the glyph row came from strings, and we have no
+ * xdisp.c (set_cursor_from_row): Don't dereference glyphs_end.
+ If all the glyphs of the glyph row came from strings, and we have no
cursor positioning clues, put the cursor on the first glyph of the
row.
(handle_face_prop): Use chunk-relative overlay string index when
Simplify under the assumption that USE_2_TAGS_FOR_INTS is defined.
(INTTYPEBITS): New macro, for clarity.
(INTMASK, MOST_POSITIVE_FIXNUM): Use it.
- (LISP_INT1_TAG, LISP_STRING_TAG, LISP_INT_TAG_P): Simplify
- now that USE_LSB_TAG is always defined.
+ (LISP_INT1_TAG, LISP_STRING_TAG, LISP_INT_TAG_P):
+ Simplify now that USE_LSB_TAG is always defined.
(TYPEMASK, XINT) [USE_LSB_TAG]: Remove unnecessary cast.
(make_number) [!USE_LSB_TAG]: Use INTMASK; that's simpler.
* lisp.h (Lisp_Object) [CHECK_LISP_OBJECT_TYPE]: Define as struct
instead of union.
(XLI, XIL): Define.
- (XHASH, XTYPE, XINT, XUINT, make_number, XSET, XPNTR, XUNTAG): Use
- them.
- * emacs.c (gdb_use_struct): Renamed from gdb_use_union.
+ (XHASH, XTYPE, XINT, XUINT, make_number, XSET, XPNTR, XUNTAG):
+ Use them.
+ * emacs.c (gdb_use_struct): Rename from gdb_use_union.
* .gdbinit: Check gdb_use_struct instead of gdb_use_union.
- * alloc.c (widen_to_Lisp_Object): Removed.
+ * alloc.c (widen_to_Lisp_Object): Remove.
(mark_memory): Use XIL instead of widen_to_Lisp_Object.
* frame.c (delete_frame): Remove outdated comment.
* w32fns.c (Fw32_register_hot_key): Use XLI instead of checking
Fput (symbol, Qautoload, XCDR (function));
XSYMBOL (symbol)->function = definition;
- /* Handle automatic advice activation */
- if (CONSP (XSYMBOL (symbol)->plist) && !NILP (Fget (symbol, Qad_advice_info)))
+ /* Handle automatic advice activation. */
+ if (CONSP (XSYMBOL (symbol)->plist)
+ && !NILP (Fget (symbol, Qad_advice_info)))
{
call2 (Qad_activate_internal, symbol, Qnil);
definition = XSYMBOL (symbol)->function;
}
DEFUN ("defalias", Fdefalias, Sdefalias, 2, 3, 0,
- doc: /* Set SYMBOL's function definition to DEFINITION, and return DEFINITION.
+ doc: /* Set SYMBOL's function definition to DEFINITION.
Associates the function with the current load file, if any.
The optional third argument DOCSTRING specifies the documentation string
for SYMBOL; if it is omitted or nil, SYMBOL uses the documentation string
-determined by DEFINITION. */)
+determined by DEFINITION.
+The return value is undefined. */)
(register Lisp_Object symbol, Lisp_Object definition, Lisp_Object docstring)
{
CHECK_SYMBOL (symbol);
LOADHIST_ATTACH (Fcons (Qdefun, symbol));
if (!NILP (docstring))
Fput (symbol, Qfunction_documentation, docstring);
- return definition;
+ /* We used to return `definition', but now that `defun' and `defmacro' expand
+ to a call to `defalias', we return `symbol' for backward compatibility
+ (bug#11686). */
+ return symbol;
}
DEFUN ("setplist", Fsetplist, Ssetplist, 2, 2, 0,
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