A variable occurs free in an expression if it is not bound by an enclosing let expression.
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A variable occurs free in an expression if it is not bound by an enclosing let expression. Implement this predicate as an isFree method for each AST node, such that given a variable name of type String, the method returns true if that name occurs free in that AST node, and false otherwise.
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Firstly a brief introduction to the terms used in your query In the context of programming languages an Abstract Syntax Tree AST is a tree representat...View the full answer
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An Experiential Introduction To Principles Of Programming Languages
ISBN: 9780262045452
1st Edition
Authors: Hridesh Rajan
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