Immutable HTML Builder

html-builder-immutable.scala

import xml.{Text, Node, NodeSeq}

class HtmlBuilder {
  var html: NodeSeq = NodeSeq.Empty
  def b(f: (HtmlBuilder) => Seq[Node]): Node = <b>{f(this).toSeq}</b>
  def a(href: String)(f: (HtmlBuilder) => Seq[Node]): Node = <a href={href}>{f(this).toSeq}</a>
  def text(text: String): Text = Text(text)
}

val builder: HtmlBuilder = new HtmlBuilder
import builder._
val html = a(href = "http://scala-lang.org") { builder => import builder._; Seq(
  b { builder => Seq(
    text("Scala Lang Website")
  )}
)}
assert(html.toString == """<a href="http://scala-lang.org"><b>Scala Lang Website</b></a>""")