public SubLObject eval(final SubLEnvironment env) {
Values.resetMultipleValues();
SubLObject operatorSymbol = first();
if (operatorSymbol.isSymbol()) {
SubLOperator operator = operatorSymbol.toSymbol().getFunction();
if (operator.isFunction()) {
return operator.getFunc().evalViaApply(this.toCons(), env);
}
if (operator.isSpecial()) {
final SubLFunction func = operator.toSpecialOperator().getEvaluationFunction();
final BinaryFunction binFunc = func.getBinaryFunction();
if (binFunc != null) {
return binFunc.processItem(toCons(), env);
}
return func.apply(this.toCons(), env);
}
if (operator.isMacroOperator()) {
return operator
.toMacro()
.getMacroExpander()
.apply(this.asConsList().toCons(), env)
.eval(env); // @hack asConsList() call
}
Errors.error(operatorSymbol + " does not have a function value.");
} else if (SubLInterpretedFunction.isPossiblyLambdaExpression(operatorSymbol, true)) {
final SubLInterpretedFunction lambda =
SubLOperatorFactory.makeInterpretedFunction(operatorSymbol.toCons(), env);
return lambda.evalViaApply(this.toCons(), env);
}
throw new InvalidSubLExpressionException(operatorSymbol + " is not an operator.");
}
private final SubLList mapResult(
BinaryFunction function, SubLList list2, boolean returnConsedResults) {
SubLList result = SubLNil.NIL;
for (SubLObject cur = this, cur2 = list2;
(cur != SubLNil.NIL) && (cur2 != SubLNil.NIL);
cur = cur.rest(), cur2 = cur2.rest()) {
final SubLObject curResult = function.processItem(cur.first(), cur2.first());
if (returnConsedResults) {
result = SubLObjectFactory.makeCons(curResult, result);
}
}
if (returnConsedResults) {
return result.asConsList().reverse(true).toList();
}
return result;
}
public SubLList assoc(SubLObject item, BinaryFunction test, UnaryFunction key) {
SubLObject currentItem = null;
SubLList result = SubLNil.NIL;
SubLListListIterator iter = null;
Resourcer resourcer = Resourcer.getInstance();
SubLList curAssoc;
try {
iter = resourcer.acquireSubLListListIterator(this);
while (iter.hasNext()) {
curAssoc = iter.nextSubLObject().toList();
if (SubLNil.NIL != test.processItem(item, key.processItem(curAssoc.first()))) {
result = curAssoc;
break;
}
}
} finally {
resourcer.releaseSubLListListIterator(iter);
}
return result;
}
