Hi, I am reading the ANTLR definitive reference book by Terence Parr, and read about backtracking and LL(*). The book says that backtracking is only used when LL(*) fails. On the other hand, it says that backtracking doesn't invoke any actions when guessing, then rewinds input and reparses again (possibly with memoization for performance). How does this function with trying LL(*) first? Aren't actions invoked during this phase, and then, when it fails, and backtracking finally finds a viable alternative, aren't they invoked again? Or am I misunderstanding what the book says?
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