[antlr-interest] hollerith string

[marcschellens]

How to parse a hollerith string

the format is nHccccc
where n is a number H a 'H' and cccc n characters
eg:

5Habcde  is 'abcde'

I did the following (using antlr c++ mode) in the lexer:

NUMBER
	: (DIGIT)+ 
        (H! 
            { 
                string text=$getText;
                int len=atoi(text.c_str());
                $setText("");
                for( int i=0; i<len; i++)
                {
                    consume(); // appends char
                }   
                _ttype=STRING; 
            }
        )?
    ;

I think it should work, but generally I prefer not to call
internals like 'consume()' directly. So is there a way of avoiding
it?
thanks,
marc



 

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