| | | decf-after | |
|
| place
&optional decrement
=> original-value | [Macro] |
Purpose
Decrement the value of place, returning the original value of
place.
Package :gbbopen-tools
Module :gbbopen-tools
Arguments and values
| place | A form which is suitable for use as a generalized reference | |
| decrement | A number (default is 1)
| |
| original-value | A number |
Returns
The original value of place.
See also
incf-after
Examples
> (defparameter *x* 4) > (decf-after *x*) 4 > *x* 3 > (decf-after *x* 3) 3 > *x* 0 >
Note
Declared numeric and pseudo
probability versions of decf-after are also
provided: decf-after&, decf-after$&,
decf-after$, decf-after$$,
decf-after$$$, and decf-after%.
The GBBopen Project
| | | decf-after | |