/* This file is part of SableCC ( http://sablecc.org ).
 *
 * See the NOTICE file distributed with this work for copyright information.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sablecc.sablecc.semantics;

import java.util.*;

public class Signature {

    private ArrayList<Type> types;

    // Cached values

    private Boolean isSimple;

    public Signature(
            ArrayList<Type> types) {

        this.types = types;
    }

    public boolean isSimple() {

        if (this.isSimple == null) {
            if (this.types.size() == 0) {
                this.isSimple = true;
            }
            else if (this.types.size() > 1) {
                this.isSimple = false;
            }
            else {
                Type type = this.types.get(0);
                this.isSimple = type.isSimple();
            }
        }

        return this.isSimple;
    }

    public ArrayList<Type> getTypes() {

        return this.types;
    }
}
