/*
 * Copyright 2013 Samsung Information Systems America, Inc.
 *
 * 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.
 */

// Author: Koushik Sen

(function(module){

    function SymbolicStringVar(sym) {
        if (!(this instanceof SymbolicStringVar)) {
            return new SymbolicStringVar(sym);
        }
        this.sym = sym;
    }

    SymbolicStringVar.prototype = {
        constructor: SymbolicStringVar,

        substitute : function(assignments) {
            var ret;
            if ((ret = assignments[this.sym])!== undefined) {
                return ret;
            }
            return this;
        },

        getLength: function() {
            return this.sym+"__length";
        },

        toString: function() {
            return this.sym;
        }
    }

    module.exports = SymbolicStringVar;
}(module));
