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Write down the drawback of top down parsing of backtracking.
Following are disadvantages of top down parsing of backtracking:
(i) Semantic actions can't be performed whereas making a prediction. The actions should be delayed till the prediction is identified to be a part of a successful parse.
(ii) Precise error reporting is impossible. A mismatch only triggers backtracking. A source string is identified to be erroneous just after all predictions have failed.
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#questi on.. How it works explain
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