-----Messaggio originale----- Da: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] Per conto di Darren Cook Inviato: venerdì 31 ottobre 2003 14.31 A: Boost Users mailing list Oggetto: Re: [Boost-users] [BLL] How to search in a list for an objectcomparinga data member?
struct Foo { int fDataMember;}
int main() { std::vector<Foo> foos; Foo fo; std::find_if(foos.begin(), foos.end(), _1->fDataMember == fo.fDataMember); //<-- won't compile; }
As your vector is of Foo, not Foo*, did you mean "_1.fDataMember" ?
If so, you can do this: std::find_if(foos.begin(), foos.end(), bind(&Foo::fDataMember,_1) == fo.fDataMember);
That assumes: #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> using namespace boost::lambda;
I imagine you're having trouble with "_1->fDataMember".
I didn't realize there was a limitation when using "->". Surely there must already be something in the lambda library to deal with this? It seems like something that must come up a lot.
Darren
Thanks Gianluca
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