// 2>r
private static void ontoR2()
{
var top = Stack.Pop();
ReturnStack.Push(Stack.Pop());
ReturnStack.Push(top);
}
void ReturnStackOverflowTest()
{
Int16[] data = { 0, 1, 2, 3, 4 };
ReturnStack rs = MakeStack(data.GetLength(0) - 1);
Assert.Throws <StackOverflowException>(() => data.Any(i => { rs.Push(data[i]); return(false); }));
}
void ReturnStackPushPopTest()
{
Int16[] data = { 0, 1, 2, 3, 4, 5 };
ReturnStack rs = MakeStack(data.GetLength(0));
data.Any(i => { rs.Push(data[i]); return(false); });
Assert.True(rs.Position == 0);
Assert.True(data.All(i => rs.Pop() == data[rs.Size - rs.Position]));
}
// The return stack being a part of the actual call stack doesn't make a
// lot of sense in .Net so it's just a second stack, indistinguishable in all
// but usage from the Data stack.
// >r
private static void ontoR()
{
ReturnStack.Push(Stack.Pop());
}