diff options
Diffstat (limited to 'doc/lispref/functions.texi')
| -rw-r--r-- | doc/lispref/functions.texi | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/doc/lispref/functions.texi b/doc/lispref/functions.texi index 948c6bb96f8..42441361fea 100644 --- a/doc/lispref/functions.texi +++ b/doc/lispref/functions.texi @@ -737,9 +737,12 @@ explicitly in the source file being loaded. This is because By contrast, in programs that manipulate function definitions for other purposes, it is better to use @code{fset}, which does not keep such records. @xref{Function Cells}. + +If the resulting function definition chain would be circular, then +Emacs will signal a @code{cyclic-function-indirection} error. @end defun -@defun function-alias-p object &optional noerror +@defun function-alias-p object Checks whether @var{object} is a function alias. If it is, it returns a list of symbols representing the function alias chain, else @code{nil}. For instance, if @code{a} is an alias for @code{b}, and @@ -750,9 +753,8 @@ a list of symbols representing the function alias chain, else @result{} (b c) @end example -If there's a loop in the definitions, an error will be signaled. If -@var{noerror} is non-@code{nil}, the non-looping parts of the chain is -returned instead. +There is also a second, optional argument that is obsolete and has no +effect. @end defun You cannot create a new primitive function with @code{defun} or @@ -1539,6 +1541,9 @@ is not a function, e.g., a keyboard macro (@pxref{Keyboard Macros}): If you wish to use @code{fset} to make an alternate name for a function, consider using @code{defalias} instead. @xref{Definition of defalias}. + +If the resulting function definition chain would be circular, then +Emacs will signal a @code{cyclic-function-indirection} error. @end defun @node Closures |