/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2017 The JavaParser Team.
 *
 * This file is part of JavaParser.
 *
 * JavaParser can be used either under the terms of
 * a) the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * b) the terms of the Apache License
 *
 * You should have received a copy of both licenses in LICENCE.LGPL and
 * LICENCE.APACHE. Please refer to those files for details.
 *
 * JavaParser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 */

package com.github.javaparser.ast.nodeTypes;

import com.github.javaparser.ast.expr.Expression;

import java.util.Optional;

/**
 * Represents a node which has a scope expression that can be traversed/walked.
 * This unifies scope access for NodeWithScope and NodeWithOptionalScope.
 */
public interface NodeWithTraversableScope {

    /**
     * @return the scope of this node, regardless of optionality.
     * An optional scope is returned directly.
     * A required scope is returned in an "Optional", but will never be empty.
     */
    Optional<Expression> traverseScope();
}