Question

Is there any other way to assign values to template class members in constructors, other than using explicit initialization for fundamental types or casting?

template <class T>
struct A
{
public:
   T member;

   A() :member(T()) // or :member(static_cast<T>(1.0f))
   {}
};

I want to assign a value of 1.0 to member in the constructor. Can I do this without casting?

Answer 1

Yes, use an integer, which can be implicitly converted to any numeric type:

template <class T>
struct A
{
public:
   T member;

   A() : member(1)
   {}
};

int main()
{
  A<int> a1;
  A<double> a2;
  A<float> a3; 
  return 0;
}