internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
if (callStack.GetLastNumberOfParameters() != NumberOfParameters)
throw new exceptions.RuntimeException(Symbol + ": Invalid parameter count");
envStack.PushNew();
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
int provided = callStack.GetLastNumberOfParameters();
if (provided < NumberOfParameters - 1) // -1 as there may be an empty list as rest parameter
throw new exceptions.RuntimeException(Symbol + ": Invalid parameter count");
object restParameter = Nil.GetInstance();
for (int i = 0; i < NumberOfParametersToSkip; ++i) skipStack.Push(valueStack.Pop());
int numberOfValuesForRestParameter = 1 + provided - NumberOfParameters;
for (int i = 0; i < numberOfValuesForRestParameter; ++i) restParameter = new Pair(valueStack.Pop(), restParameter);
valueStack.Push(restParameter);
for (int i = 0; i < NumberOfParametersToSkip; ++i) valueStack.Push(skipStack.Pop());
envStack.PushNew();
ip += Length;
}
