[antlr-interest] [C++] How to init varaibles of MyParser ?

[Ruslan Zasukhin]

Hi guys,

Assume I do such parser

-------------------------------------------------
class VSQL_Parser extends Parser;

{
    public:
        std::ostream*   mstream;
static  bool            print_error_to_console;

void reportError(const antlr::RecognitionException& ex)
{
    if( mstream ) 
        *mstream << ex.toString().c_str() << '\n';

    if( print_error_to_console )
        std::cout << ex.toString().c_str() << '\n';
}

}
-------------------------------------------------


Question is, how I can make ANTLR to generate C++ sources that will init
mstream on construction of parser instance ???

PROBLEM IS:

1) I cannot define own version of constructor in the above { } section.

2) because ANTLR produce the next constructors for parser:

-------------------------------------------------
VSQL_Parser::VSQL_Parser(antlr::TokenBuffer& tokenBuf, int k)
: antlr::LLkParser(tokenBuf,k)
{
}

VSQL_Parser::VSQL_Parser(antlr::TokenBuffer& tokenBuf)
: antlr::LLkParser(tokenBuf,2)
{
}

-------------------------------------------------

3) I think only way to resolve this problem is that ANTLR need generate
constructors that call some InitSelf() method. I can then define such
method.

Yes, this method cannot be virtual.

4) or anybody knows other trick?


-- 
Best regards,
Ruslan Zasukhin      [ I feel the need...the need for speed ]
-------------------------------------------------------------
e-mail: ruslan at paradigmasoft.com
web: http://www.paradigmasoft.com

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