Implement Pratt parser.

1 files changed, 17 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/DefaultLeftCommand.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/DefaultLeftCommand.java
new file mode 100644
index 0000000..24802a6
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/pratt/DefaultLeftCommand.java
@@ -0,0 +1,17 @@
+package bjc.utils.parserutils.pratt;
+
+import bjc.utils.data.ITree;
+
+class DefaultLeftCommand<K, V, C> extends LeftCommand<K, V, C> {
+
+	@Override
+	public ITree<Token<K, V>> leftDenote(ITree<Token<K, V>> operand, Token<K, V> operator, ParserContext<K, V, C> ctx) {
+		throw new UnsupportedOperationException("Default command has no left denotation");
+	}
+
+	@Override
+	public int leftBinding() {
+		return -1;
+	}
+
+}