@builtin(vertex_index): u32 gets translated to [u8; 0x4]

[jullanggit]

Issue

For some reason the binding for this:

struct VertexInput {
    @builtin(vertex_index) vertex_index: u32,
};

is this:

#[repr(C)]
#[derive(Debug, PartialEq, Clone, Copy, encase::ShaderType)]
pub struct VertexInput {
    pub vertex_index: [u8; 0x4],
}

which is a bit weird, but wouldn't really be a problem, but encase doesn't implement ShaderSize for u8's, so this is a compiler error!