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by HarHarVeryFunny 157 days ago
No, but his first "Tree-walk Interpreter" does - he builds an AST then uses the visitor pattern to interpret it.

https://craftinginterpreters.com/representing-code.html#work...
1 comments
etyp 157 days ago
To quote the very first paragraph of the bytecode interpreter section[1]:

> The style of interpretation it uses—walking the AST directly—is good enough for some real-world uses, but leaves a lot to be desired for a general-purpose scripting language.

Sometimes it's useful to teach progressively, using techniques that were used more often and aren't as much anymore, rather than firehosing a low-level bytecode at people.

[1] https://craftinginterpreters.com/a-bytecode-virtual-machine....

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HarHarVeryFunny 157 days ago
Sure, I'm not criticizing it.

He's doesn't actually build on this though, but rather goes back to a single pass compiler (no AST, no visitor) for his bytecode compiler.

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