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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Cool Lexical Features
ANTLR has three great token-related features that are worth demonstrating in our tour. First, we’ll see how to deal with formats like XML that have different lexical structures (inside and outside tags) in the same file. Next, we’ll learn how to insert a field into a Java class by tweaking the input stream. It’ll show how to generate output that is very similar to the input with minimal effort. And, lastly, we’ll see how ANTLR parsers can ignore whitespace and comments without having to throw them out.
Island Grammars: Dealing with Different Formats in the Same File
All the sample input files we’ve seen so far contain a single language, but there are common file formats that contain multiple languages. For example, the ...
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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.