Re: Declare and Define Before Use? [rant]

[Rubn via Digitalmars-d-learn]

On Wednesday, 4 April 2018 at 20:01:55 UTC, Ali wrote:
On Wednesday, 4 April 2018 at 19:51:27 UTC, kdevel wrote:
On Wednesday, 4 April 2018 at 19:19:30 UTC, Ali wrote:
BTW: You can't write
   void main ()
   {
      x.writeln;
      int x;
   }
   import std.stdio;


This is because x is not module scope
you can do this

   void main ()
   {
      x.writeln;

   }

   import std.stdio;
   int x;

Cause there's no scope at the module level.


struct A
{
    A* a;

    ~this()
    {
        // use a
    }
}

void main()
{
    A b = A(&a);
    A a; // in this case "a" destructed before "b", but "b" uses 
"a"

}


Destruction and order of destruction becomes much more confusing. 
You also can't do scope(exit) at the module level for a reason. 
This mess shouldn't be allowed, it just makes it way worse to 
understand what is going on.