rightDelim: t.rightDelim,
	}
}

// AddParseTree associates the argument parse tree with the template t, giving
// it the specified name. If the template has not been defined, this tree becomes
// its definition. If it has been defined and already has that name, the existing
// definition is replaced; otherwise a new template is created, defined, and returned.
func (t *Template) AddParseTree(name string, tree *parse.Tree) (*Template, error) {

	}

	// Define a named template with specified contents.
	def := func(name, contents string) {
		sub := template.New(name)
		template.Must(sub.Parse(contents))
		template.Must(templates.AddParseTree(name, sub.Tree))
	}

	// Embedded files.
	def("css", loadCSS("html/common.css"))
	def("header", loadFile("html/header.html"))
	def("graph", loadFile("html/graph.html"))
	def("graph_css", loadCSS("html/graph.css"))