c++ - How to put boost::multi_array in initialization list of constructor? -

i've got templated class dedicated holding boost:: multi_array. trying initialize array in initialization class, getting error:

template <typename t> class hist2d { private:   typedef boost::multi_array<t, 2> array_type;   array_type matrixcount;  public:   hist2d(int width, int height): array_type matrixcount(boost::extents[width][height]){};  }; 

this gives following error:

ctest.cpp: in constructor ‘hist2d<t>::hist2d(int, int)’: ctest.cpp:34:45: error: expected ‘(’ before ‘matrixcount’    hist2d(int width, int height): array_type matrixcount(boost:extents[width][height]){};                                               ^ ctest.cpp:34:45: error: expected ‘{’ before ‘matrixcount’ 

what these errors mean?

it syntax error. not need declare type in initialization list.

try this:

hist2d(int width, int height): matrixcount(boost::extents[width][height]){} 

c++ compilation errors can confusing. you'll used them after while :d