Re: [Boost-users] [lambda] if-then-else construct gets broken bylambda-lib

Hi Nat!

[Nat] Does it work better if the 'else' clause is something more like:

( boost::lambda::bind(boost::ref(*m_wf)) )

Well, not really. If I do that, I get the error. error: no match for ternary 'operator?:' in '(sIndex < (((boost::cor_cm_iterator4*)this)->boost::cor_cm_iterator4::m_maxIndex + 1)) ? boost::lambda::bind(boost::ref(((boost::cor_cm_iterator4*)this)->boost::cor_cm_iterator4::m_cf), minDeg, boost::lambda::<unnamed>::_1) : boost::lambda::bind(boost::ref((*((boost::cor_cm_iterator4*)this)->boost::cor_cm_iterator4::m_wf)))'

? This is a wild guess, but boost::ref() isn't by itself a lambda bind expression -- is it? Both halves of the ternary operator are convertible to boost::function -- but they're not the same type.

I don't know whether two different boost::lambda::bind expressions are going to be compatible either. You may have to explicitly instantiate boost::function objects on both sides of the : -- which would end up being less terse than writing the if/else statement. But it seems worth a try.

I actually have no clue. Nevertheless, I'm already very happy to have written my first lambda-stuff without struggling to much with it - it is quite a magic thing to get it working for a beginner. Anyway thanks for your response. Greetings, Sebastian

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