Translations:Development/KDevelop-PG-Qt Introduction/152/en: Difference between revisions

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'''KDevelop-PG-Qt''' has an alternative to the - ''potentially'' slow - backtracking mechanism: Look ahead. You can use the ''LA(qint64)'' function in embedded C++ code (see sections above). ''LA(1)'' will return the current token, you most probably never need to use that. Accordingly, ''LA(2)'' returns the next and ''LA(0)'' the previous token. (If you wonder where these somewhat uncommon indexes come from: Read the thesis, or make yourself acquainted with ''LA(k)'' parser theory.)

KDevelop-PG-Qt has an alternative to the - potentially slow - backtracking mechanism: Look ahead. You can use the LA(qint64) function in embedded C++ code (see sections above). LA(1) will return the current token, you most probably never need to use that. Accordingly, LA(2) returns the next and LA(0) the previous token. (If you wonder where these somewhat uncommon indexes come from: Read the thesis, or make yourself acquainted with LA(k) parser theory.)