Imported dice stuff from general utils into dedicated project

1 files changed, 81 insertions, 0 deletions

diff --git a/dice-lang/src/bjc/utils/dice/ast/OperatorDiceNode.java b/dice-lang/src/bjc/utils/dice/ast/OperatorDiceNode.java
new file mode 100644
index 0000000..c4f7763
--- /dev/null
+++ b/dice-lang/src/bjc/utils/dice/ast/OperatorDiceNode.java
@@ -0,0 +1,81 @@
+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;
+	}
+}