less.js/lib/less/tree/quoted.js

(function (tree) {

tree.Quoted = function (str, content, escaped, i) {
    this.escaped = escaped;
    this.value = content || '';
    this.quote = str.charAt(0);
    this.index = i;
};
tree.Quoted.prototype = {
    toCSS: function () {
        if (this.escaped) {
            return this.value;
        } else {
            return this.quote + this.value + this.quote;
        }
    },
    eval: function (env) {
        var that = this;
        this.value = this.value.replace(/`([^`]+)`/g, function (_, exp) {
            return new(tree.JavaScript)(exp, that.index, true).eval(env).value;
        }).replace(/@\{([\w-]+)\}/g, function (_, name) {
            return new(tree.Variable)('@' + name, that.index).eval(env).value;
        });
        return this;
    }
};

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