(function (tree) {

tree.Assignment = function (key, val) {

this.key = key;
this.value = val;

}; tree.Assignment.prototype = {

toCSS: function () {
    return this.key + '=' + (this.value.toCSS ? this.value.toCSS() : this.value);
},
eval: function (env) {
    if (this.value.eval) { this.value = this.value.eval(env) }
    return this;
}

};

})(require('../tree'));