(function (tree) {

tree.Assignment = function (key, val) {

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

}; tree.Assignment.prototype = {

type: "Assignment",
accept: function (visitor) {
    this.value = visitor.visit(this.value);
},
eval: function (env) {
    if (this.value.eval) {
        return new(tree.Assignment)(this.key, this.value.eval(env));
    }
    return this;
},
genCSS: function (env, output) {
    output.add(this.key + '=');
    if (this.value.genCSS) {
        this.value.genCSS(env, output);
    } else {
        output.add(this.value);
    }
},
toCSS: tree.toCSS

};

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