You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_bitfields.rs
    path of file: ./repos/c2rust/tests/structs/src
    
    the code of the file until where you have to start completion: //! extern_crate_c2rust_bitfields

use crate::bitfields::{
    from_csmith, mixed_bitfields, padded_bitfield, rust_compare_three_byte_date, rust_get_bf_ptr,
    rust_init_bitfield_array, rust_init_from_csmith, rust_ma_results, rust_modify_bf_ptr,
    rust_multiple_assignments, rust_ops_padded_bitfield, rust_ops_padded_bitfield_init,
    rust_static_date, rust_two_eight_bits_init, rust_use_renamed_field, rust_write_three_byte_date,
    three_byte_date, two_eight_bits,
};
use std::mem::size_of;

extern "C" {
    fn size_of_three_byte_date() -> usize;
    
pub fn test_bf_arrays_and_pointers() {
    let c_size_of = unsafe { size_of_mixed_bitfields() };

    assert_eq!(size_of::<mixed_bitfields>(), c_size_of);

    const size: usize = 5;

    // Test zeroed bitfield struct (incl padding)
    let mut array = [unsafe { zeroed_mixed_bitfields() }; size];
    let last_y_ptr = unsafe { rust_init_bitfield_array(array.as_mut_ptr(), size as _) };

    assert_eq!(array[0].x(), 0);
    assert_eq!(array[0].y, 0.0);
    assert_eq!(array[1].x(), 1);
    assert_eq!(array[1].y, 2.2);
    assert_eq!(array[2].x(), 2);
    assert_eq!(array[2].y, 4.4);
    assert_eq!(array[3].x(), 3);
    assert_eq!(array[3].y, 6.6000000000000005);
    assert_eq!(array[4].x(), 4);
    assert_eq!(array[4].y, 8.8);

    unsafe {
        assert_eq!(*last_y_ptr, 8.8);

        *last_y_ptr = 4.4;
    }

    assert_eq!(array[4].y, 4.4);
}