tenua.symbol
Class Assignment
java.lang.Object
tenua.symbol.Symbol
tenua.symbol.Assignment
public class Assignment
- extends Symbol
A Symbol that handles assignment to a variable from the stack
- Author:
- Daniel Wachsstock
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
eval
public void eval(DoubleStack s,
VariableMemento v)
- assigns a value to the stored variable
- Specified by:
eval
in class Symbol
- Parameters:
s
- the stack to pop the value fromv
- the memento to have the variable use
getTarget
public Variable getTarget()
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
toString
public void toString(java.util.Stack stringStack,
java.util.Stack precedenceStack,
SymbolTable st)
- Description copied from class:
Symbol
- pushes a StringBuffer that reflects this Symbol, with all its arguments
- Overrides:
toString
in class Symbol
- Parameters:
stringStack
- the stack of StringBuffer from which to pop arguments
and to which to push resultsprecedenceStack
- a stack to be push'ed and pop'ed in parallel with
stringStack that contains Integers, corresponding to the precedence of
the arguments onstringStack. This is used to determine placement of
parentheses. Anything other than a binary operation should push
Symbol.maxPrecedence
st
- the SymbolTable
to get Symbol names from
Note: the name is a misnomer; it uses StringBuffer's, not String's