[antlr-interest] Error: TokenStreamException while reading Grammer

[Johannes Luber]

Chal Chale apne Ghar schrieb:
> Hi Johannes,
> One more thinig i woudl like to say that in my very first mail, i had
> tested this Grammer with Antlr version 2.7.5. Then alos it was throwing
> me Token StreamException as below mentioned:
>  
> D:\Actuate\Samplelexer-parser\ConversionTool>java antlr.Tool
>>         vb_org.txt
>>         ANTLR Parser Generator   Version 2.7.5 (20050128)   1989-2005
>>         jGuru.com
>>         error: Token stream error reading grammar(s):
>>         vb_org.txt:45:7: expecting ''', found 'p'
>>         TokenStreamException: expecting ''', found 'p'
>>
> regards,
> Gunjan

Sorry, I've never used ANTLR 2.7.7 or even 2.7.7 (which you should try
yourself in case it's a runtime bug), so I can't help you there.
ANTLRworks works only for ANTLR 3 upwards.

Johannes
> 
> On Wed, Feb 4, 2009 at 12:20 PM, Johannes Luber <jaluber at gmx.de
> <mailto:jaluber at gmx.de>> wrote:
> 
>     Chal Chale apne Ghar schrieb:
>     >
>     >
>     > Hi Gavin,
>     > Thanks for quick Response.
>     > It was really helpful to me.
>     > After trying with the antlr v3 , I am getting different error in
>     console.
> 
>     You are using the syntax for ANTLR 2.7.7 which is mostly incompatible
>     with the one used by ANTLR 3. The general form of a grammar is:
> 
>     /** This is a grammar doc comment */
>     grammar-type grammar name;
>     options { name1 = value; name2 = value2; ... }
>     import delegateName1=grammar1, ..., delegateNameN=grammarN; // can omit
>     delegateName
>     tokens { token-name1; token-name2 = value; ... }
>     scope global-scope-name-1 { «attribute-definitions» }
>     scope global-scope-name-2 { «attribute-definitions» }
>     ...
>     @header {...}
>     @lexer::header {...}
>     @members {...}
> 
>     «rules»
> 
>     To set the superclass of the generated class, use the superClass option.
> 
>     See
>     <http://www.antlr.org/wiki/display/ANTLR3/ANTLR+v3+printable+documentation>
>     for further information. Although I'm really wondering how ANTLRworks
>     didn't complain about the fact, that you are actually using a ANTLR 2
>     grammar. I suggest that you either convert the grammar to the new syntax
>     or just use ANTLR 2.7.7.
> 
>     Johannes
>     >
>     > D:\Actuate\Samplelexer-parser\ConversionTool>java org.antlr.Tool
>     > D:\Actuate\VB\v
>     > b_org.g
>     > ANTLR Parser Generator  Version 3.1.1
>     > error(100): D:\Actuate\VB\vb_org.g:1:1: syntax error: antlr:
>     > D:\Actuate\VB\vb_or
>     > g.g:1:1: unexpected token: class
>     > warning(149): D:\Actuate\VB\vb_org.g:0:0: rewrite syntax or operator
>     > with no out
>     > put option; setting output=AST
>     > error(150):  grammar file D:\Actuate\VB\vb_org.g has no rules
>     > error(100): D:\Actuate\VB\vb_org.g:0:0: syntax error: assign.types:
>     > <AST>:0:0: u
>     > nexpected end of subtree
>     > error(100): D:\Actuate\VB\vb_org.g:0:0: syntax error: define:
>     <AST>:0:0:
>     > unexpec
>     > ted end of subtree
>     > i am attching my .g file fro reference.
>     > Any help would be appriciated.
>     > regards,
>     > Gunjan
>     > On Tue, Feb 3, 2009 at 1:23 AM, Gavin Lambert
>     <antlr at mirality.co.nz <mailto:antlr at mirality.co.nz>
>     > <mailto:antlr at mirality.co.nz <mailto:antlr at mirality.co.nz>>> wrote:
>     >
>     >     At 21:45 2/02/2009, Chal Chale apne Ghar wrote:
>     >
>     >         D:\Actuate\Samplelexer-parser\ConversionTool>java antlr.Tool
>     >         vb_org.txt
>     >         ANTLR Parser Generator   Version 2.7.5 (20050128)   1989-2005
>     >         jGuru.com
>     >         error: Token stream error reading grammar(s):
>     >         vb_org.txt:45:7: expecting ''', found 'p'
>     >         TokenStreamException: expecting ''', found 'p'
>     >
>     >         as seen, i am getting TokenStream Exception. But when i am
>     using
>     >         AntlrWorks to check the Grammer syntax, it is showing
>     correct to me.
>     >
>     >
>     >     You're running ANTLR v2 on the command line, but ANTLRWorks is for
>     >     ANTLR v3.  To run ANTLR v3, you need to use "org.antlr.Tool", not
>     >     "antlr.Tool".
>     >
>     >     Also, by convention grammar files have a .g extension.  This
>     doesn't
>     >     really matter (ANTLR will still happily compile the file
>     regardless
>     >     of extension), but it's a good idea to follow the convention,
>     since
>     >     that's what tools are expecting.
>     >
>     >
>     >
>     >
>     >
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>     >
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