I've implemented my lisp/scheme based on Three Implementation Models for Scheme and also Lisp in Small Pieces. Both make a CPS transformation, which, after finally wrapping my head around it, is great for many things. For example it makes implementing async/await very easy (without implementing call/cc which I find too powerful). I use them a lot since I use the language for scripting games, where asynchronous structures really shine.

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matheusmoreira 3 days ago | parent [-]

I wrote my lisp as a modified explicit control evaluator from SICP because I wanted to avoid transforming the code at all.

> Three Implementation Models for Scheme

This was a good read, thank you for the reference.

> call/cc which I find too powerful

Why do you think that? Do you have the same opinion about delimited continuations?

	▲	tikotus a day ago \| parent [-]
		Good question, but I'm not yet experienced enough in language design to give a coherent answer. And I'm not very familiar with delimited continuations. But I think it boils down to keeping the VM simple. Now it's just all closures, and I can focus on optimizing closures. Adding first class continuations would reauire me to also optimize those. Also having continuations makes optimizing closures harder, since it prevents certain assumptions. As long as closures and CPS enable everything I need, I'm not tempted to add another, more powrful structure.