Question

My question: When a structure has c-tor, why can’t I statically initialize it ?

My compiler claims :

type `myStruct' must be initialized by constructor, not by `{...}'

Why is that ? I’m using gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)

To illustrate, here is the struct that is rejected by the compiler.

struct myStruct
{
    int a;
    double b;

    myStruct() { a= 0; b = 0.0; }
}

void main()
{
    myStruct ms = {7, 7.7}; // Now this compiler does not accept.
} 

Answer 1

The inclusion of a user-defined c-tor means it’s no longer an aggregate type. This would also be the case if there was no user-defined c-tor for the struct itself, but you have a non-static data-member of the struct that is not a POD or aggregate type.