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

  • lispm@alien.topB
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    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.