Move Pratt Parser to new project

1 files changed, 40 insertions, 0 deletions

diff --git a/JPratt/src/main/java/bjc/utils/parserutils/pratt/commands/BinaryPostCommand.java b/JPratt/src/main/java/bjc/utils/parserutils/pratt/commands/BinaryPostCommand.java
new file mode 100644
index 0000000..806f2f3
--- /dev/null
+++ b/JPratt/src/main/java/bjc/utils/parserutils/pratt/commands/BinaryPostCommand.java
@@ -0,0 +1,40 @@
+package bjc.utils.parserutils.pratt.commands;
+
+import bjc.utils.parserutils.pratt.NonInitialCommand;
+
+/**
+ * A operator with fixed precedence.
+ * 
+ * @author bjculkin
+ * 
+ * @param <K>
+ *                The key type of the tokens.
+ * 
+ * @param <V>
+ *                The value type of the tokens.
+ * 
+ * @param <C>
+ *                The state type of the parser.
+ */
+public abstract class BinaryPostCommand<K, V, C> extends NonInitialCommand<K, V, C> {
+	private final int leftPower;
+
+	/**
+	 * Create a new operator with fixed precedence.
+	 * 
+	 * @param precedence
+	 *                The precedence of the operator.
+	 */
+	public BinaryPostCommand(int precedence) {
+		if (precedence < 0) {
+			throw new IllegalArgumentException("Precedence must be non-negative");
+		}
+
+		leftPower = precedence;
+	}
+
+	@Override
+	public int leftBinding() {
+		return leftPower;
+	}
+}
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