define(function (require) {

    var LazyExpr = function(options) {
        this.expr = options.expr;
        this.context = options.context;
    };

    var Lazy = function(expr, context) {

        return new LazyExpr({
            expr: expr,
            context: context
        });

    };

    Object.defineProperty(LazyExpr.prototype, "value", {
        configurable: true,
        get: function () {
            var self = this;

            return function() { return eval(self.expr);}.call(this.context);
        }
    });

    return Lazy;
});