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package bjc.utils.dice.ast;
// The following classes need to be changed upon addition of a new operator
// 1. DiceASTExpression
// 2. DiceASTFlattener
// 3. DiceASTParser
/**
* A node that represents an operator
*
* @author ben
*
*/
public enum OperatorDiceNode implements IDiceASTNode {
/**
* Represents adding two nodes
*/
ADD,
/**
* Represents assigning one node to another
*/
ASSIGN,
/**
* Representings combining two node values together
*/
COMPOUND,
/**
* Represents dividing two nodes
*/
DIVIDE,
/**
* Represents using one node a variable number of times
*/
GROUP,
/**
* Represents multiplying two nodes
*/
MULTIPLY,
/**
* Represents subtracting two nodes
*/
SUBTRACT;
/**
* Create a operator node from a string
*
* @param s
* The string to convert to a node
* @return The operator corresponding to the node
*/
public static OperatorDiceNode fromString(String s) {
switch (s) {
case ":=":
return ASSIGN;
case "+":
return ADD;
case "-":
return SUBTRACT;
case "*":
return MULTIPLY;
case "/":
return DIVIDE;
case "d":
return GROUP;
case "c":
return COMPOUND;
default:
throw new IllegalArgumentException(
s + " is not a valid operator node");
}
}
/*
* (non-Javadoc)
*
* @see bjc.utils.dice.ast.IDiceASTNode#isOperator()
*/
@Override
public boolean isOperator() {
return true;
}
}
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