Discussion
The chief practical disadvantage of LR parsing is that
Answer: C
Correct answer: the tables are opaque and conflicts can be hard to diagnose
LR parsing is linear in the input and handles a wide class of grammars, so the objection is not to its power. It is that a conflict is reported against a state number and an item set rather than against the language construct the author was thinking about, which makes tracing the cause a skilled exercise.
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