faking global, constant-after-init structs

gistfile1.rs

use std::cast;

struct FooStatics {
    x: int,
}

static mut globalFooStatics: *FooStatics = 0 as *FooStatics;

impl FooStatics {
    unsafe fn init() {
        let global = ~FooStatics {
            x: 2 + 2,  // initialization value is computed at runtime
        };
        globalFooStatics = cast::transmute(global);
    }

    fn get() -> &'static FooStatics {
        unsafe {
            cast::transmute(globalFooStatics)
        }
    }
}

fn main() {
    unsafe { FooStatics::init(); }
    println!("{:d}", FooStatics::get().x);
}