RE: [Boost-Users] Getting the hang of Boost::Bind

-----Original Message----- From: Douglas Gregor [mailto:gregod@cs.rpi.edu] Sent: Friday, August 09, 2002 3:32 PM To: Boost-Users@yahoogroups.com Subject: Re: [Boost-Users] Getting the hang of Boost::Bind

On Friday 09 August 2002 06:08 pm, Tom Matelich wrote:

...

I have a vector of

class Landmark { public: std::string const& getName() const; ... };

I want to do a find_if for a name that I have.

something like std::find_if(begin, end, boost::bind(std::equalstd::string(???, name_to_find)));

What do I put for the ??? ?

I presume that [begin, end) is an iterator sequence of Landmark instances? Then ??? = boost::bind(&Landmark::getName, _1), meaning that the first parameter to std::equalstd::string::operator() is a call to Landmark::getName where the object parameter (this) is the first argument (_1) to the bind function object.

Thanks for the quick reply. That's what I thought. To make things more concrete... std::vector<Landmark> v; ... std::vector<Landmark>::const_iterator iter = std::find_if(v.begin(), v.end(), boost::bind(std::equalstd::string, boost::bind(ZLandmark::Landmark::getName, _1), name_to_find)); Is what I think you're telling me. Perhaps I should mention now that I am using VC6. Compiling the above line I get many errors, here are the first three: inspdoc.cpp(453) : error C2780: 'class boost::_bi::bind_t,class boost::_bi::list1 > __cdecl boost::bind(R T::*,A1)' : expects 2 arguments - 3 provided c:\dev\opt\include\boost/bind.hpp(1362) : see declaration of 'bind' inspdoc.cpp(453) : error C2780: 'class boost::_bi::bind_t,class boost::_bi::list9

__cdecl boost::bind(R (__thiscall T::*)(B1,B2,B3,B4,B5,B6,B7, B8) const,A1,A2,A3,A4,A5,A6,A7,A8,A9)' : expects 10 arguments - 3 provided c:\dev\opt\include\boost/bind/bind_mf_cc.hpp(223) : see declaration of 'bind' inspdoc.cpp(453) : error C2780: 'class boost::_bi::bind_t,class boost::_bi::list9 __cdecl boost::bind(R (__thiscall T::*)(B1,B2,B3,B4,B5,B6,B7,B 8),A1,A2,A3,A4,A5,A6,A7,A8,A9)' : expects 10 arguments - 3 provided c:\dev\opt\include\boost/bind/bind_mf_cc.hpp(212) : see declaration of 'bind'

Oh, and I guess that should be std::equal_to, right? Didn't work either though. Thanks, Tom PS Unfortunately, I have to run. I'll be looking at this again this weekend though. ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------