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This is insane! Just curios, are there real-world use cases for stuff like this?

• williamdclt 6y ago
  I could imagine working on very complex static JSON. You want to type-check selections and transformations on this JSON. It's a very niche use-case, this is definitely more of an impressive showcase of the new Template Literal Types feature of TS :)
  • ricksharp 6y ago
    You can import a json document directly into typescript and the entire document is a readonly constant type of the entire json object literal. I've used this with a template JSON document that has an instance of all possible types in the runtime json. Sometimes you might have to loosen the type slightly, but it works great for a quick start.
• greencore 6y ago
  You can embed any language interpreter into TypeScript and have that language syntaticaly checked by TS compiler.