Hi, Is it possible to use wave only for the following? - Macros - Conditional inclusion/exclusion - #include handling
What else is a preprocessor supposed to do?
In other words, it is possible to use wave with a dummy lexer? The idea is to use wave to generate a string representation after preprocessing a file; the resulting string can then be passed to a custom spirit V2.2+ grammar.
The tokens returned from Wave's iterators hold the string representation of the tokens. That means you can simply concatenate these to get the output as a string: context_type ctx (input.begin(), input.end(), filename); context_type::iterator_type first = ctx.begin(); context_type::iterator_type last = ctx.end(); std::string result; while (first != last) { result += (*first).get_value(); ++first; } Is that what you need?
One could write a lexer with the tiny subset of C++ tokens that is used in my grammar, but that seems overkill for a small grammar (which is currently well- tested and performs quite well). The application is very similar to the C++- like config file structure supported by property_tree.
The closest I have been able to come using components out of the box is to use the cpplexer with the following non-default features (compared to the quick- start example): - preserve comments - disable whitespace insertion
That's what you probably want to set anyways.
If a dummy lexer is already available that works, where can it be found?
None that I know of. Regards Hartmut --------------- http://boost-spirit.com