Generating unique IDs for types at compile time

Question

I want to generate a unique id for every type at compile time. Is this possible in Rust?

So far, I have the following code

//Pseudo code
struct Class         


        

Answer 1

This sounds like a job for the bitflags! macro:

#[macro_use] extern crate rustc_bitflags;

bitflags!(
    #[derive(Debug)]
    flags ComponentMask: u8 {
        const Render     = 0b00000001,
        const Position   = 0b00000010,
        const Physics    = 0b00000100
    }
);

// the set of components owned by an entity:
let owned_components:  = Render | Position;

// check whether an entity has a certain component:
if owned_components.contains(Physics) { ... }

http://doc.rust-lang.org/rustc_bitflags/macro.bitflags!.html