Computers and Technology, 03.07.2020 22:01, antwain2

Solve the following problem (i. e. the first attribute grammar may accept what the second attribute grammar rejects and vice versa): Augment this grammar with attributes, attribute computation functions, and predicates to reject WAE expressions which contain WITH sub-expressions with duplicate variable names in their alist. For example, the following WAE expression should be rejected:

{ +20 { with { x 2} {y 4} {x 5}} {+ x y}}}

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Solve the following problem (i. e. the first attribute grammar may accept what the second attribute...