D does not offer RAII

[carun]

D offers only scoped destruction and not resource acquisition is initialization. Basically the resource is not always acquired during initialization as struct in D can't have default constructors. Library implementations like Automem makes using RAII in D as easy as C++, but only for heap memory and not for all kinds of resources (like mutex, etc). It is unfair to say that D supports RAII. Its RAII is nowhere close to what C++ offers that it shouldn't be called RAII by definition.

[timotheecour]

@carun
added a caveat in e062744

Adding a dummy argument is the common workaround for lack of default struct constructors:

struct A{
  T data;
  this(int dummy){
    // initialize data
  } 
 ~this(){
    // deinitialize data
  }
}

void main(){
  void fun(){
    auto a = A(0);
    // ~A called deterministically upon scope exit
  }
}

What are the limitations of this workaround pattern? (honest question)

[PetarKirov]

@carun Counterpoint: D offers scoped classes, which can have default constructors :P