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defmacro

Eval-Apply (alien.top)

submitted 1 year ago by OkGroup4261@alien.top to c/lisp

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What is so special about the SICP eval-apply loop? What is so enlightening about it?

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[–] lispm@alien.top 1 points 1 year ago

allows you to skip the often tedious parsing step by using the host's read

READ mostly gives a tree of tokens. This makes it a form of a tokenizer. After we call READ we don't know what the tokens mean: is FOO a variable, a macro, a function, a built-in special form, a type, ... This can only be determined by interpreting/compiling the token tree.

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