Method is_empty

crates/aiur/src/querymap.rs:71–73

(&self)

    assert!(cap > 0, "HugeVec capacity must be positive");
    let bytes = cap * size_of::<T>();
    let ptr = unsafe {
      let p = libc::mmap(
        std::ptr::null_mut(),
        bytes,
        libc::PROT_READ | libc::PROT_WRITE,
        libc::MAP_PRIVATE | libc::MAP_ANONYMOUS,