[Boost-users] [Lambda] find_if + vector of arrays

From: Sohail Somani (s.somani_at_[hidden])
Date: 2006-07-25 17:19:16

Hi,

Why can't lambda figure out the return type of operator[] for array?
Does it know about vectors? I know I can fix the compile error by using
bl::ret<double>(bl::_1[0])... But for obvious reasons, I'd much rather
not!

#include <vector>
#include <algorithm>

#include <boost/array.hpp>
#include <boost/lambda/lambda.hpp>

int main()
{
    namespace bl=boost::lambda;
    using std::vector;
    using boost::array;

    array<double,3> cpy = {1};
    vector<vector<double> > a(10,vector<double>(3,1));
    vector<array<double,3> > b(10,cpy);

    std::find_if(a.begin(),a.end(),bl::_1[0]==5);
    std::find_if(b.begin(),b.end(),bl::_1[0]==5);
}

Thanks!

Sohail