diff options
Diffstat (limited to 'doc/misc/cl.texi')
| -rw-r--r-- | doc/misc/cl.texi | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/doc/misc/cl.texi b/doc/misc/cl.texi index 9bace48df4f..a6fe29e1026 100644 --- a/doc/misc/cl.texi +++ b/doc/misc/cl.texi @@ -1245,6 +1245,12 @@ blocks for other macros like @code{cl-incf}, and @code{cl-pushnew}. The @code{cl-letf} and @code{cl-letf*} macros are used in the processing of symbol macros; @pxref{Macro Bindings}. +@defmac with-memoization @var{place} @var{code}@dots{} +This macro provides a simple way to do memoization. @var{code} is +evaluated and then stashed in @var{place}. If @var{place}'s value is +non-@code{nil}, return that value instead of evaluating @var{code}. +@end defmac + @node Variable Bindings @section Variable Bindings @@ -5028,7 +5034,7 @@ The above @code{incf} example could be written using @ignore (defmacro concatf (place &rest args) (gv-letplace (getter setter) place - (macroexp-let2 nil v (mapconcat 'identity args "") + (macroexp-let2 nil v (mapconcat 'identity args) (funcall setter `(concat ,getter ,v))))) @end ignore @end defmac |