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(Solved by Expert Tutors) Suppose we wanted to change our requirement that you have had under dis


In the same identifier cannot be used more than once. In other words, the previous modification to would have allowed the following: [(X>+Z) and (U < X)]

This would have been allowed because although X appears twice in the it only appears once in each that makes up the . Under our new requirement above, this would not be allowed because X appears more than once across the entire . Answer the following question:

When is the earliest we can catch a violation of this altered requirement and produce an error? In other words, is this requirement regular (can be caught by the Tokenizer), context-free (can be built into the grammar itself), context-sensitive (can be caught before the execution phase, but only after obtaining more context than what is in the grammar itself) or runtime (can only be found as a runtime error while the CORE program is being executed)? Select one of the options from the list and provide a short (2-5 sentence) justification for your choice.

 


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Answered

QUALITY

Approved

DATE ANSWERED

Apr 19, 2020

EXPERT

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ANSWER RATING

YES, THIS IS LEGAL

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