Re: [eigen] Matrix blocks not working with gcc 4.5.0

[Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx>]

Just out of curiosity, what does VS2010 do with this perfectly legal
(but silly) code:



#include <iostream>
#include <Eigen/Core>

template <int N>
struct S
{
  Eigen::Matrix<double,2*N,2*N> m;

  void F();
};

template <int N>
void S<N>::F()
{
  (m.block<N,N>(0,0)).setIdentity();
  (m.block<N,N>(0,N)).setIdentity();
};

// Here comes a bogus specialization of Eigen::Matrix:
namespace Eigen {
template<>
struct Matrix<double, 8, 8, 0, 8, 8>{
  struct bogus{
    bogus& operator<(int n) { std::cout << "<" << n; return *this;}
    bogus& operator,(bool f) { std::cout << "," << f; return *this;}
    void setIdentity() {std::cout << "setIdentity()\n"; }
  } block;
};
}

int main()
{
  S<4> s;
  s.F();
}




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Dipl.-Inf. Christoph Hertzberg
Cartesium 0.051
Universität Bremen
Enrique-Schmidt-Straße 5
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