Update Pratt Parser

1 files changed, 63 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/NonInitialCommand.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/NonInitialCommand.java
new file mode 100644
index 0000000..b6797d3
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/NonInitialCommand.java
@@ -0,0 +1,63 @@
+package bjc.utils.parserutils.pratt;
+
+import bjc.utils.data.ITree;
+import bjc.utils.parserutils.ParserException;
+
+/**
+ * Represents a non-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 NonInitialCommand<K, V, C> {
+	/**
+	 * Construct the left denotation of this command.
+	 * 
+	 * @param operand
+	 *                The left-hand operand of this command.
+	 * @param operator
+	 *                The operator for this command.
+	 * 
+	 * @param ctx
+	 *                The state needed for commands.
+	 * 
+	 * @return The tree this command forms.
+	 * 
+	 * @throws ParserException
+	 *                 If something went wrong during parsing.
+	 */
+	public abstract ITree<Token<K, V>> denote(ITree<Token<K, V>> operand, Token<K, V> operator,
+			ParserContext<K, V, C> ctx) throws ParserException;
+
+	/**
+	 * Get the left-binding power of this command.
+	 * 
+	 * This represents the general precedence of this command.
+	 * 
+	 * @return The left-binding power of this command.
+	 */
+	public abstract int leftBinding();
+
+	/**
+	 * Get the next-binding power of this command.
+	 * 
+	 * This represents the highest precedence of command this command can be
+	 * the left operand of.
+	 * 
+	 * This is the same as the left-binding power by default.
+	 * 
+	 * @return The next-binding power of this command.
+	 */
+	public int nextBinding() {
+		return leftBinding();
+	}
+}