You would generally want the general purpose string type in your language to always be escaped when serializing, and only allow avoiding that if you opt-in expl

You would generally want the general purpose string type in your language to always be escaped when serializing, and only allow avoiding that if you opt-in explicitly. So, for instance you'd have an H1::new(contents: TextNode) constructor, and you'd have to build a TextNode; if you build TextNode::new(text: &str), then it would escape it. If you wanted to explicitly pass in raw HTML, then you'd need something like HTMLFragment::from_str(&str), and it would parse and return the fully parsed and appropriately typed fragment object that could then be used to build larger fragments. There might be some way to unsafely opt out, like HTMLFragment::from_str_raw(&str), that would just give a node that when traversed would just be dumped raw into the output, but that would be warned against and only used if you wanted to avoid the cost of parsing and re-serializing some large, known-safe fragment; it wouldn't be what you would normally use.