D vs. placement new (for classes) aka why D needs .sizeof and

[Forest Ray]

Thanks for get me thinking along that path, the size of a class can be found by using CLASS.classinfo.init.length

import std.stdio;

class foo {
	int a = 1;
	int b = 2;
	int c = 3;
}

void main() {
	writefln("size = ", foo.classinfo.init.length);
}

./xxx
size = 20


Frank Benoit (keinfarbton) Wrote:

> 
> > well, i don't know about the size of the class, but it does not give the
> > size of the class /instance/.
> 
> I was sure i had an example that shows it doesn't.
> But it seems I am wrong. Sorry about that. If i find it, I file a bug
> report.
> 
> Frank