antlr4

I'm trying to implement syntax highlighting in C# on Android, using Xamarin. I'm using the ANTLR v4 library for C# to achieve this. My code, which is currently syntax highlighting Java with this grammar , does not attempt to build a parse tree and use the visitor pattern. Instead, I simply convert the input into a list of tokens: private static IList<IToken> Tokenize(string text) { var inputStream = new AntlrInputStream(text); var lexer = new JavaLexer(inputStream); var tokenStream = new CommonTokenStream(lexer); tokenStream.Fill(); return tokenStream.GetTokens(); } Then I loop through all of

I have been using ANTLR with Eclipse for some time using the ANTLRv3IDE plugin. While it is not perfect, and a bit outdated, it does its job reasonably well. Now I am looking to switch to ANTLRv4 for another DSL that I am creating. However, Eclipse support seems to be extremely thin. I decided to try out ANTLRWorks, which is a NetBeans plugin, but I could not get it to install (it seems to be locked to specific dated versions (201302132200 while I have something newer, still 7.3 as docs say) of dependencies). So, the question: Has anyone set up any Java IDE (preferably Eclipse, but I could be

I'm trying to write a piece of code that will take an ANTLR4 parser and use it to generate ASTs for inputs similar to the ones given by the -tree option on grun ( misc.TestRig ). However, I'd additionally like for the output to include all the line number/offset information. For example, instead of printing (add (int 5) '+' (int 6)) I'd like to get (add (int 5 [line 3, offset 6:7]) '+' (int 6 [line 3, offset 8:9]) [line 3, offset 5:10]) Or something similar. There aren't a tremendous number of visitor examples for ANTLR4 yet, but I am pretty sure I can do most of this by copying the default

I am having trouble getting Intellij to recognize the generated source code from antlr4. Any reference to the generated code appears as errors, code completion doesn't work, etc. I am using maven and the antlr4-maven-plugin to generate the code. My code, referencing the generated code compiles and builds fine under maven. The generated code is under /target/generated-sources/antlr4, which is what Intellij expects. I have tried the usual fixes such as reimport maven projects, update folders, invalidate cache, etc. None of it seems to work. Anyone seen this before? Is there a way to point to the

I have seen many ANTLR grammars that use whitespace handling like this: WS: [ \n\t\r]+ -> skip; // or WS: [ \n\t\r]+ -> channel(HIDDEN); So the whitespaces are thrown away respectively send to the hidden channel. With a grammar like this: grammar Not; start: expression; expression: NOT expression | (TRUE | FALSE); NOT: 'not'; TRUE: 'true'; FALSE: 'false'; WS: [ \n\t\r]+ -> skip; valid inputs are ' not true ' or ' not false ' but also ' nottrue ' which is not a desired result. Changing the grammar to: grammar Not; start: expression; expression: NOT WS+ expression | (TRUE | FALSE); NOT: 'not';

I am a beginner of antlr. I was trying to use visitor in my code and following the instruction on the net. However, I found out that the visitor was not entering the method I create at all. May anyone tell me what I did wrong? This is my visitor: import java.util.LinkedList; import org.antlr.v4.runtime.misc.NotNull; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** * * @author Sherwood */ public class ExtractMicroBaseVisitor extends MicroBaseVisitor<Integer> { //LinkedList<IR> ll = new LinkedList<IR>(); //MicroParser parser; //System.out

I have a C# solution with an Antlr3 grammar file, and I'm trying to upgrade to Anltr4. It turns out the grammar was the easy part (it became better, and one third the size!). Generating the parser turned out to be the tricky part. In the old solution I merely ran AntlrWorks to update the lexer and parser .cs files when the grammar file changed. The lexer and parser were included directly in the same project as the grammar so the framework around the parser could make use of them directly. With the Antlr4 targets for C# I noticed that (at least by default) the output path of the generated

I have the following grammar for ANTLR 4: grammar Pattern; //parser rules parse : string LBRACK CHAR DASH CHAR RBRACK ; string : (CHAR | DASH)+ ; //lexer rules DASH : '-' ; LBRACK : '[' ; RBRACK : ']' ; CHAR : [A-Za-z0-9] ; And I'm trying to parse the following string ab-cd[0-9] The code parses out the ab-cd on the left which will be treated as a literal string in my application. It then parses out [0-9] as a character set which in this case will translate to any digit. My grammar works for me except I don't like to have (CHAR | DASH)+ as a parser rule when it's simply being treated as a token