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by _moof
502 days ago
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This is just my opinion but I believe it's because the syntax tree is the syntax. In a Lisp macro you are working with lists, just like you are for any other Lisp code. Almost every other language I've used (I've been programming since the late 1980s) has, at best, a special data structure to manipulate ASTs. So it ends up being quite unnatural. Lisp macros are just Lisp. |
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This holds for "old" lisps. There are other options. Racket and Scheme uses "syntax objects". Syntax objects contain besides the old syntax tree also source location information and lexical information.
See for example the last part of:
https://parentheticallyspeaking.org/articles/bicameral-not-h...