Hi all,
I redefined assertions to throw exception the following way:

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#undef eigen_assert
#define eigen_assert(x) \
  if (!x) { \
     std::string s = std::string(__FILE__) + std::string(" : ") + std::string(__FUNCTION__) + std::string(" : ") + std::string(EIGEN_MAKESTRING(x)); \
     throw (std::runtime_error(s.c_str() )); }


In this case simplest code above returns exception in VectorXd constructor with message "Eigen/src/Core/Matrix.h : Matrix : dim >= 0".
But it does not produce assert without assertion redefinement. Furthermore, if I ignore this exception, other parts of vector initialization works well (memory was allocated properly).

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using namespace std;
using namespace Eigen;

int main(){
   try{
          VectorXd v(3);
          v << 1, 2, 3;
          cout << "v =" << endl <<  v << endl;
   } catch(std::runtime_error &e){
          std::cout << e.what() << std::endl;
   }
     return(0);
}

How can I redefined assertion in right way?
I will be very appreciated for help with that trouble.

common macro mistake, it should be:

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...
if (!(x))
...


ggael wrote:common macro mistake, it should be:

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...
if (!(x))
...


Thank you for help and cool library!