1 files changed, 55 insertions, 0 deletions
diff --git a/JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryCommand.java b/JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryCommand.java
new file mode 100644
index 0000000..739cb44
--- /dev/null
+++ b/JPratt/src/main/java/com/ashardalon/pratt/commands/BinaryCommand.java
@@ -0,0 +1,55 @@
+package com.ashardalon.pratt.commands;
+
+import bjc.data.Tree;
+
+import com.ashardalon.pratt.ParserContext;
+import com.ashardalon.pratt.commands.CommandResult.Status;
+import com.ashardalon.pratt.tokens.Token;
+
+import bjc.data.SimpleTree;
+import bjc.utils.parserutils.ParserException;
+
+/**
+ * A binary operator.
+ *
+ * @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 BinaryCommand<K, V, C> extends BinaryPostCommand<K, V, C> {
+	/**
+	 * Create a new binary operator with the specified precedence.
+	 *
+	 * @param precedence
+	 *                   The precedence of the operator.
+	 */
+	public BinaryCommand(final int precedence) {
+		super(precedence);
+	}
+
+	/**
+	 * The right-binding power (right-precedence) of this command.
+	 * 
+	 * @return The right binding power of this command.
+	 */
+	protected abstract int rightBinding();
+
+	@Override
+	public CommandResult<K, V> denote(final Tree<Token<K, V>> operand,
+			final Token<K, V> operator, final ParserContext<K, V, C> ctx)
+			throws ParserException {
+		final CommandResult<K,V> opr
+				= ctx.parse.parseExpression(rightBinding(), ctx.tokens, ctx.state, false);
+		
+		if (opr.status != Status.SUCCESS) return opr;
+
+		return CommandResult.success(new SimpleTree<>(operator, operand, opr.success()));
+	}
+}
+\ No newline at end of file