• sugar_in_your_tea@sh.itjust.works
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    6 months ago

    Ah, apparently for now you’re not allowed to allocate. But vec::new_in(allocator) looks interesting. This works in nightly today:

    #![feature(allocator_api)]
    
    use std::alloc::Global;
    
    fn main() {
        const MY_VEC: Vec<i32> = const {
            Vec::new_in(Global)
        };
        println!("{:?}", MY_VEC);
    }
    

    Maybe at some point I can append to it at compile time too. I’d love to be able to put a const {} and have allocations that resolve down to a 'static, and this seems to be a step toward that.

    I guess I’m just excited that Vec::new() is the example they picked, since the next obvious question is, “can I push?”