Re: [Opencxx-users] Unable to compile metaclass on Cygwin 1.5.18

[Maciej L. <Mac...@be...>]

> Stefan wrote:
> Could you please post the actual code which occ complains about ? (Just
> the surrounding lines will probably do.)
>
> Chances are indeed that occ is getting to its limits with modern C++
> code (such as the type traits).
>
> The problem stems from occ being a 'context-free' parser,
> when the actual C++ grammar is not context-free. Specifically, a  
> conformant
> parser has to consider a symbol's type when it attemps to decide on
> a particular production. Depending on whether a given symbol corresponds
> to a variable, type, or template, the token stream is interpreted  
> differently
> (expression or type-id ? relational-expression or template-id ? Etc.)
>
> As occ builds its symbol table only after the parsing stage is over, it
> has to rely on heuristics, which sometimes fail.
>
> I have been able to work with a (slightly enhanced) form of the OpenC++
> parser class for some time, but as I'm now trying to parse template-heavy
> code, even my version fails.
> In the context of the synopsis project (http://synopsis.fresco.org) I
> have thus started to rewrite the Parser class from scratch.
>

Thanks to all for rescue me :)

Scott are right it is a problem with template parameter identifier,
i.e. the error message I’ve attached in the first post:

/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/cpp_type_traits.h:83:
parse error before `>'

points at:
    // Compare for equality of type
    template<typename, typename>

I’ve made change in Parser.cc file as Scott wrote, and now it’s working
well.

At least I can start working with OpenC++ :)

P.S. It’s worth taking Scott’s patch and make a new snapshot.

Sincerely,
Maciek Leks