Let's say I want to have rust code directly inside <script></script>, like Svelte and Vue do for JS. Would this be possible with the current configuration options?

I think this would be implementable if I just went through the TokenStream and added { after every <script> and } before every </script>. Time complexity would go down the gutter though (maybe I could implement this with a map? which is lazy, but still). Maybe a config option to accept blocks directly inside certain tags would be useful. Or a more general Visitor-like API that would allow the insertions of the {/} where needed.