Scieneer Common Lisp 1.3.9 online documentation if &rest rest [Special Form] if predicate then [else]
If predicate evaluates to non-null, evaluate then and returns its values, otherwise evaluate else and return its values. Else defaults to nil.
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| if &rest rest | [Special Form] |
if predicate then [else]
If predicate evaluates to non-null, evaluate then and returns its values, otherwise evaluate else and return its values. Else defaults to nil.