When.java

/*
 *  This file is part of the X10 project (http://x10-lang.org).
 *
 *  This file is licensed to You under the Eclipse Public License (EPL);
 *  You may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *      http://www.opensource.org/licenses/eclipse-1.0.php
 *
 *  (C) Copyright IBM Corporation 2006-2010.
 */

package x10.ast;

import java.util.List;

import polyglot.ast.Expr;
import polyglot.ast.Stmt;
import polyglot.util.Position;

/**
 * The AST node representing the X10 construct when (c) {S} or (c) {S} ...
 * @author vj
 */
public interface When extends Stmt {
	/**
	 * Return the expression of the first branch.
	 */
	Expr expr();

	/**
	 * Return the statement of the first branch.
	 */
	Stmt stmt();

	/**
	 * Add a branch to the list. To be called only by the parser.
	 * @param p
	 * @param e
	 * @param s
	 */
	void addBranch(Position p, Expr e, Stmt s);

	/**
	 * Return the expressions on the other branches of the when statement.
	 */
	List<Expr> exprs();

	/**
	 * Return the statements on the other branches of the when statement.
	 */
	List<Stmt> stmts();
}