[antlr-interest] C Target Question: compiling under C++

[Jim Idle]

On Wed, 2008-11-05 at 12:25 -0500, Colin Fraizer wrote:
> I apologize for the newbie question, but I’m somewhat new to ANTLR.
> 

This should just work, but perhaps there is a missing cast that you are
the first to discover. Are you using ANTLR 3.1.1? If you are then let me
have a piece of ANTLR grammar that shows this problem, and I will fix
it :-)

Jim
>  
> 
> I want to build a parser for a domain-specific language. I would like
> to use C++ for my implementation and understood that the C target
> would generate code that compiles under C++, but I’m running into
> trouble. (Perhaps I’ve just misunderstood. If so, I’m sorry.)
> 
>  
> 
> When I select these options:
> 
> {
> 
>                 language=C;
> 
>                 output=AST;
> 
>                 backtrack=true;
> 
>                 ASTLabelType=pANTLR3_BASE_TREE;
> 
> }
> 
>  
> 
> ANLTR generates a parser which contains lines like this:
> 
>                                         root_1 =
> (pANTLR3_BASE_TREE)(ADAPTOR->becomeRootToken(ADAPTOR,
> stream_oper->nextToken(stream_oper), root_1));
> 
>  
> 
> but my C++ compiler complains that the return type of
> stream_oper->nextToken is “void *”, which cannot be converted to
> ‘pANTLR3_COMMON_TOKEN’ without a cast.
> 
>  
> 
> Any suggestions on how to avoid this? (Or is the answer: just use C?)
> 
>  
> 
> Thanks in advance,
> 
> Colin Fraizer
> 
> Indianapolis, IN
> 
> antlr at cfraizer.com // (yeah, I use a separate mailbox for this mailing
> list. I’m not claiming to be “Mr. Antlr” or anything. 8-)
> 
> 
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