Crate raw_parts

A wrapper around the decomposed parts of a Vec<T>.

This crate defines a struct that contains the Vec’s internal pointer, length, and allocated capacity.

RawParts makes Vec::from_raw_parts and Vec::into_raw_parts easier to use by giving names to the returned values. This prevents errors from mixing up the two usize values of length and capacity.

Examples

use raw_parts::RawParts;

let v: Vec<i32> = vec![-1, 0, 1];

let RawParts { ptr, length, capacity } = RawParts::from_vec(v);

let rebuilt = unsafe {
    // We can now make changes to the components, such as
    // transmuting the raw pointer to a compatible type.
    let ptr = ptr as *mut u32;
    let raw_parts = RawParts { ptr, length, capacity };

    raw_parts.into_vec()
};
assert_eq!(rebuilt, [4294967295, 0, 1]);

no_std

raw-parts is no_std compatible with a required dependency on alloc.

Structs

• RawParts
  A wrapper around the decomposed parts of a Vec<T>.