1 files changed, 38 insertions, 0 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/NullCommand.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/NullCommand.java
new file mode 100644
index 0000000..c105361
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/NullCommand.java
@@ -0,0 +1,38 @@
+package bjc.utils.parserutils.pratt;
+
+import bjc.utils.data.ITree;
+import bjc.utils.parserutils.ParserException;
+
+/**
+ * Represents an initial command in parsing.
+ * 
+ * @author EVE
+ * 
+ * @param <K>
+ *                The key type for the tokens.
+ * 
+ * @param <V>
+ *                The value type for the tokens.
+ * 
+ * @param <C>
+ *                The state type of the parser.
+ * 
+ *
+ */
+public abstract class NullCommand<K, V, C> {
+	/**
+	 * Construct the null denotation of this command.
+	 * 
+	 * @param operator
+	 *                The operator for this command.
+	 * @param ctx
+	 *                The context for the command.
+	 * 
+	 * @return The tree for this command.
+	 * 
+	 * @throws ParserException
+	 *                 If something goes wrong during parsing.
+	 */
+	public abstract ITree<Token<K, V>> nullDenotation(Token<K, V> operator, ParserContext<K, V, C> ctx)
+			throws ParserException;
+}