I have used c++ classes (such as string, or ifstream to read a text file) without problems both in interactive ROOT sessions and in unnamed macros.
Now I’m using them inside the constructor of a class (the skeleton code of this class was generated by TTree::MakeClass) and I have a problem.
The declaration (automatic variable declared inside constructor for reading a text file. This file is closed before constructor ends):
gives me the following error:
aggregate `std::ifstream mapfile’ has incomplete type and cannot be defined
#include <string> #include <iostream> using namespace std;
at the beginning of .C file, before including .h, but this is not the solution.
Where is the error?