Re: flex++/bison++ sample source

Steinar S|reide <>
18 Feb 1998 23:02:50 -0500

          From comp.compilers

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Re: flex++/bison++ sample source (Steinar S|reide) (1998-02-18)
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From: Steinar S|reide <>
Newsgroups: comp.compilers
Date: 18 Feb 1998 23:02:50 -0500
Organization: Compilers Central
References: 98-02-063
Keywords: yacc, lex, C++

> I just couldn't figure out how to use the scanner and parser classes
> generated by flex++ and bison++. How do you tell the parser class
> which scanner to use ?

You must create a subclass of the generated parser class. The
derived class inherits the (virtual) function yylex(). You should
redefine this function to call the yylex function of your scanner,
which suitably can be a data member of your derived class.

Examples of this are included in the misc-package accompanying the tools.

Optional parameters to the function can be defined using the predefined
macros. See examples and documentation for how this is done.

Works great!

-Steinar S=F8reide

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