Re: Objects(from classes) at Compile time? no gc

[Steven Schveighoffer via Digitalmars-d-learn]

On Fri, 16 May 2014 02:31:18 -0400, Jacob Carlborg <d...@me.com> wrote:

On 16/05/14 06:59, Taylor Hillegeist wrote:

The subject says it all really. i have this example:

import core.memory;

class fruit{
   int value=5;
   public int getvalue(){
     return value;
   }
}

int main(string[] args) {
     GC.disable;
     static fruit myfruit;
     return myfruit.getvalue();
}

Most of the smart people will see that i want the program to return 5
but I did something dumb and didn't put in the "new" statement?

So my question is in longer words "Can I create instances of objects at
compile time?" and if not "why not, i could build something
(roughly)equivalent out of structs and functions and have it at compile
time?"

If you create an immutable instance it's possible to create it at compile time:

int main(string[] args) {
      GC.disable;
      immutable fruit myfruit = new immutable(fruit);
      pragma(msg, myfruit.getvalue); // will print 5 at compile time
      return myfruit.getvalue();
}

Although, I don't know if it will allocate it during  runtime as well.

It will not.

-Steve