JPratt/src/main/java/com/ashardalon/pratt/commands/impls/NonBinaryCommand.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

package com.ashardalon.pratt.commands.impls;

import com.ashardalon.pratt.commands.BinaryCommand;

/**
 * A non-associative 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 class NonBinaryCommand<K, V, C> extends BinaryCommand<K, V, C> {
	/**
	 * Create a new non-associative operator.
	 *
	 * @param precedence
	 *        The precedence of the operator.
	 */
	public NonBinaryCommand(final int precedence) {
		super(precedence);
	}

	@Override
	protected int rightBinding() {
		return 1 + leftBinding();
	}

	@Override
	public int nextBinding() {
		return leftBinding() - 1;
	}
}