[antlr-interest] Bug in ANTLR C# implementation

[Bryan Ewbank]

> Furthermore it's not always a simple matter which factory 
> should be used, at least in C++ you have to make sure you 
> share the factory over the various treeparsers you have to 
> prevent 'funny' behaviour..

My "solution" to this (I use a homogeneous AST) is to create a constructor
(target is C++) that accepts a Parser as an argument:
     /**
      * make this tree parser use the same ASTFactory as the given parser
      */
     SymScan(antlr::LLkParser& parentParser) : antlr::TreeParser()
     {
        antlr::ASTFactory *p_factory = parentParser.getASTFactory();
	  initializeASTFactory(*p_factory);
	  setASTFactory(p_factory);
     }

This way I avoid the excess code in the client, and all TreeParsers use the
same factory.



 
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