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Kawa, the Java-based Scheme system

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7.5 Procedures

Function: apply proc [arg1 ...] args
Args must be a sequence (list, vector, or string) or a primitive Java array. (This is an extension over standard Scheme, which requires that args be a list.) Calls the proc (which must be a procedure), using as arguments the arg1... values plus all the elements of args.

Syntax: constant-fold proc arg1 ...
Same as (proc arg1 ...), unless proc and all the following arguments are compile-time constants. (That is: They are either constant, or symbols that have a global binding and no lexical binding.) In that case, proc is applied to the arguments at compile-time, and the result replaces the constant-fold form. If the application raises an exception, a compile-time error is reported. For example:
 
(constant-fold vector 'a 'b 'c)
is equivalent to (quote #(a b c)), assuming vector has not been re-bound.


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