Package com.adobe.xfa.formcalc

Class Stack

java.lang.Object
com.adobe.xfa.formcalc.Stack
public final class Stack extends Object
Class Stack defines the runtime stack that's used by the invalid input: '<'a href=CalcParser.html">FormCalc scripting engine. Specifically, the FormCalc interpreter is a stack machine; it doesn't have general purpose registers. Rather all intermediate values are preserved on a stack.

For example, when the FormCalc interpreter performs an add instruction, it will pop two operands off the stack, add them together, and push the result onto the stack.

  • Method Details

    • peek

      public CalcSymbol peek(int nOffset)
      Peeks at a symbol within this Stack object.
      Parameters:
      nOffset - an offset within the stack.
      Returns:
      the symbol within the stack.