January 2013
Intermediate to advanced
328 pages
8h 5m
English
Content preview from The Definitive ANTLR 4 Reference, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Automatic Error Recovery Strategy
Error recovery is what allows the parser to continue after finding a syntax error. In principle, the best error recovery would come from the human touch in a handwritten recursive-descent parser. In my experience, though, it’s really tough to get good error recovery by hand because it’s so tedious and easy to screw up. In this latest version of ANTLR, I’ve incorporated every bit of jujitsu I’ve learned and picked up over the years to provide good error recovery automatically for ANTLR grammars.
ANTLR’s error recovery mechanism is based upon Niklaus Wirth’s early ideas in Algorithms + Data Structures = Programs [Wir78] (as well as Rodney Topor’s A Note on Error Recovery in Recursive Descent Parsers [Top82] ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.