how to call std_stdio_static_this from a dynamically loaded shared library (osx)

[timotheecour]

> What happens if you just call "std_stdio_static_this" the first 
> you do in your main function?

In my case I can't: I don't have control over the main function 
(it could be written in C for example).



> @property File stdin ()
> {
>     if (!_stdin.p)
>         _stdin.p = &stdinImpl;
>     return _stdin;
> }

I guess you also want to add inside the if(): "stdinImpl.handle = 
core.stdc.stdio.stdin;", etc.

> The same for "stdout" and "stderr". But this may not be good 
> for performance reasons. I don't know how good the compiler is 
> at optimizing these kind of functions.

I doubt the compiler can do much optimizing here, since the if 
won't always be true, but probably IO is slow enough compared to 
a branch so it might not matter.

That being said, templatizing std_stdio_static_this as above 
would avoid branching at every single call to writeXX functions. 
Would there be any disadvantage?

Also, I grepped for static_this, it appears this hack is only 
used in 2 places:
* std.stdio (=>stdiobase)
* std.process (=>processinit)
So the same template trick could be used in those 2 places.