luaur-vm 0.1.1

The Luau register virtual machine and standard library (Rust).
Documentation 
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#[allow(non_snake_case)]
#[inline]
pub const fn mask64(w: i32) -> u64 {
    if w <= 0 {
        0
    } else if w >= 64 {
        0xFFFFFFFFFFFFFFFFu64
    } else {
        0xFFFFFFFFFFFFFFFFu64 >> (64 - w)
    }
}