antlr

I'm trying to create a parser for QuickBasic and this is my attempt to get the comments: grammar QuickBasic; options { language = 'CSharp2'; output = AST; } tokens { COMMENT; } parse : .* EOF ; // DOESN'T WORK Comment : R E M t=~('\n')* { Text = $t; } -> ^(COMMENT $t) | Quote t=~('\n')* { Text = $t; } -> ^(COMMENT $t) ; Space : (' ' | '\t' | '\r' | '\n' | '\u000C') { Skip(); } ; fragment Quote : '\''; fragment E : 'E' | 'e'; fragment M : 'M' | 'm'; fragment R : 'R' | 'r'; Even if I rewrite using only the token COMMENT and nothing more, I still get the same error. // It DOESN'T WORK EITHER

According to these instructions , I'm trying to use ANTLR generated *.as files in a current Flash Builder 4.5.1 project. Therefore, I added this ANTLR's Actionscript runtime to my project - without problems. I compiled lexer/parser specs using ANTLRWorks without problems too. I added the language option to the source *.g file to make ANTLR generate Actionscript sources: options { backtrack = true; memoize = true; k=2; output = AST; language=ActionScript; // Added this ASTLabelType = CommonTree; } Unfortunately, the ANTLR/ANTLRworks generated Actionscript code is buggy: Catch statements read

I may well be asking something not achievable here.. Maybe someone can point out either (a) What would be some steps (/tools?) to at least partially achieve creation of bnf diagrams from a (rather complex) antlr grammar (b) why (if it were the case) this simply can not be achieved. E.g. maybe since antlr is extended BNF and its recursive structure differs from bnf requirements.. Along those lines. ANTLRWorks 1 works for generating diagrams, one at a time, for rule. for v4, ANTLRWorks 2 also generates them though I'm not sure it can save them to disk. Ter If it is an ANTLR 3 grammar, you could

I generated a Lua Parser using the Lua.g grammar with antlr in java. My lua code which i wish to parse basically looks like this function uniqueid_some_event (e) if (e:HasString("string1")) then -- do something end if (e:HasString("string2")) then -- do something end end I have hundred of these events in different files for specific actor bindings. Now i want to parse these files and gather for each what conditions are checked - in the above case - i want to extract "string1" and "string2" as event triggers. (To be more precise, i want to create a report that will display just the triggers for

I want to create a simple criteria expression parser with antlr3 Updated: separate AND OR expression rules to support AND/OR different hierarchy, but got another problems: if the expression is something like: a = 1 and b = 2 and c = 3 The tree should be as following according to current implement: = = (a = 1)(b = 2)(c = 3) But I want to generate it as follows: = = (a = 1)(b = 2) (c = 3) First "and" should be higher priority than another, because I want to parse all the expression as left exp and right exp. I think I need to re-write the rule in the "subcond" To make a = 1 and b = 2 and c = 3 -

Actually this issue is related with my previous question Catching ANTLR's NoViableAltException in Java and ANTLRWorks Debugger , but I decided to split them because of different symptoms. The issue is about feeding to ANTLR input text, which contains unknown tokens. Consider for example, that our grammar doesn't known anything about tokens which start with @ symbol. If we will try to feed such text to ANTLRWorks interpreter, we will receive NoViableAltException in result graph. But if we will take generated and compiled grammar in Java and try to parse such invalid text with it, we can receive