control/setq
(dec! address)
Macro defined at lib/control/setq.lisp:153:2
Decrements the value described by ADDRESS by 1.
Example
> (with (x 1)
. (dec! x)
. x)
out = 0
(defsetq pattern repl)
Macro defined at lib/control/setq.lisp:50:2
Define the setq!/over! PATTERN with the replacement REPL. The
replacement must be a lambda, which is going to be applied to the
(quoted) replacement. Captures in the pattern are also available in
the replacement’s scope.
Note that the value given to REPL is not a value: Rather, it is a
function that decides what the new value should be. The returned
value must be a list, preferably of the form
(progn ... ; modify the value
the-value)
That is - modify the value, then return it.
Example:
> (defsetq
. (car ?addr)
. (lambda (val)
. `(.<! ,addr 1 (,val (.> ,addr 1)))))
(inc! address)
Macro defined at lib/control/setq.lisp:141:2
Increments the value described by ADDRESS by 1.
Example
> (with (x 1)
. (inc! x)
. x)
out = 2
(over! address fun)
Macro defined at lib/control/setq.lisp:22:2
Replace the value at ADDRESS according to FUN.
Examples:
> (define list '(1 2 3))
out = (1 2 3)
> (over! (car list) (cut = <> 2))
out = (false 2 3)
(setq! address value)
Macro defined at lib/control/setq.lisp:36:2
Replace the value at ADDRESS with VALUE.
Examples:
> (define list '(1 2 3))
out = (1 2 3)
> (setq! (car list) 3)
out = (3 2 3)