2.5.3.1.10 PopStack
A support function, PopStack, pops the topmost operand from the stack.
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STACKELEMENT PopStack ( STACK ResultStack, INT32 StackPos ) -- -- On entry -- ResultStack is the stack. -- StackPos is the stack position IF StackPos equals 0 THEN Return NULL END IF Decrement StackPos by 1 Return ResultStack[StackPos] END-SUBROUTINE