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POANTLR fuzzy parsing
 

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    <p>I'm building a kind of pre-processor in ANTLRv3, which of course only works with fuzzy parsing. At the moment I'm trying to parse include statements and replace them with the corresponding file content. I used this example:</p> <p><a href="https://stackoverflow.com/questions/13347997/antlr-removing-clutter">ANTLR: removing clutter</a></p> <p>Based on this example, I wrote the following code:</p> <pre><code>grammar preprocessor; options { language='Java'; } @lexer::header { package antlr_try_1; } @parser::header { package antlr_try_1; } parse : (t=. {System.out.print($t.text);})* EOF ; INCLUDE_STAT : 'include' (' ' | '\r' | '\t' | '\n')+ ('A'..'Z' | 'a'..'z' | '_' | '-' | '.')+ { setText("Include statement found!"); } ; Any : . // fall through rule, matches any character ; </code></pre> <p>This grammar does only for printing the text and replacing the include statements with the "Include statement found!" string. The example text to be parsed looks like this:</p> <pre><code>some random input some random input some random input include some_file.txt some random input some random input some random input </code></pre> <p>The output of the result looks in the following way:</p> <pre><code>C:\Users\andriyn\Documents\SandBox\text_files\asd.txt line 1:14 mismatched character 'p' expecting 'c' C:\Users\andriyn\Documents\SandBox\text_files\asd.txt line 2:14 mismatched character 'p' expecting 'c' C:\Users\andriyn\Documents\SandBox\text_files\asd.txt line 3:14 mismatched character 'p' expecting 'c' C:\Users\andriyn\Documents\SandBox\text_files\asd.txt line 7:14 mismatched character 'p' expecting 'c' C:\Users\andriyn\Documents\SandBox\text_files\asd.txt line 8:14 mismatched character 'p' expecting 'c' C:\Users\andriyn\Documents\SandBox\text_files\asd.txt line 9:14 mismatched character 'p' expecting 'c' some random ut some random ut some random ut Include statement found! some random ut some random ut some random ut </code></pre> <p>As far as I can judge, it is confused by the "in" in the word "input", because it "thinks" it would be the INCLUDE_STAT token.</p> <p>Is there a better way to do it? The filter option I cannot use, since I need not only the include statements, but also the rest of the code. I've tried several other things, but couldn't find a proper solution.</p>
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