Boost MultiArray Copy Constructor

Question

I have got a problem understanding the copy constructor implementation of boost::multi_:array.

When I try the following

std::vector<double> a;
std::vector<double> b;
a.resize(12);
b.resize(10);
a=b;

everything works out fine,

but when I try

boost::multi_array<double,1> a;
boost::multi_array<double,1> b;
a.resize(boost::extents[12]);
b.resize(boost::extents[10]);
a=b;

I get a crash.

I expected the same behaviour, but I also could not find anything useful in the documentation.

Does anyone have an idea ?

Regards

awallrab

Answer 1

It looks like boost::multi_array works just like std::valarray regarding assignment, that is the size of the 2 arrays must match.

According to the documentation:

Each of the array types multi_array, multi_array_ref, subarray, and array_view can be assigned from any of the others, so long as their shapes match.