| 1 | Syntax trees only represent the lexical and syntactic structure of the source code. | |
| 2 | It doesn't see the AAA because the variable with that value is a lexical variable, and only exists inside of A. | |
| 3 | These functions create a lexical closure on the scope in which they were defined like blocks in many dynamic languages. | |
| 4 | From the lexical point of view, you know that there isn' t much room to work with, but there is a room in the structural and syntax level. | |
| 5 | Scheme, a function programming language, is the first dialect of LISP to fully support lexical scoping, first-class procedures, and continuations. |
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