Crate slicefields

The slicefields crate provides a zero-cost way of using bit slices into fields of a struct as if they were real fields
In the following code snippet for example, the struct Cat only has one 8-bit field but bitstruct allows this 8-bit field to be partitioned into a 1-bit boolean field and a 7-bit integer field by generating methods which act like getters and setters for such fields but are instead backed by bit slices of said 8-bit field

extern crate slicefields;
use slicefields::slicefields;

#[slicefields(
    has_kittens(bool, data(0..1)),
    color(u8, data(1..8))
)]
struct Cat {
    data: u8
}
let mut cat  = Cat { data: 1 };
assert_eq!(cat.has_kittens(), true);
cat.set_color(4);

For a detailed explanation of the syntax, see the slicefields macro.

Note that you do not have to use Rust’s built-in types for this:
Any type that implements the necessary traits for bitwise operations (such as those from the ux crate which provides non-standard width integers) can both be used as backing for a slice field as well as be a slice field itself

Attribute Macros

slicefields

The syntax for the slicefields attribute works as follows:
#[slicefields((options)name(type, backing_field(range_of_bitslice)))]