Struct core::raw::Slice

pub struct Slice<T> {
    pub data: *const T,
    pub len: usize,
}

Unstable (raw #27751)

The representation of a slice like &[T].

This struct is guaranteed to have the layout of types like &[T], &str, and Box<[T]>, but is not the type of such slices (e.g. the fields are not directly accessible on a &[T]) nor does it control that layout (changing the definition will not change the layout of a &[T]). It is only designed to be used by unsafe code that needs to manipulate the low-level details.

However, it is not recommended to use this type for such code, since there are alternatives which may be safer:

• Creating a slice from a data pointer and length can be done with std::slice::from_raw_parts or std::slice::from_raw_parts_mut instead of std::mem::transmuteing a value of type Slice.
• Extracting the data pointer and length from a slice can be performed with the as_ptr (or as_mut_ptr) and len methods.

If one does decide to convert a slice value to a Slice, the Repr trait in this module provides a method for a safe conversion from &[T] (and &str) to a Slice, more type-safe than a call to transmute.

Examples

#![feature(raw)] fn main() { use std::raw::{self, Repr}; let slice: &[u16] = &[1, 2, 3, 4]; let repr: raw::Slice<u16> = slice.repr(); println!("data pointer = {:?}, length = {}", repr.data, repr.len); }

#![feature(raw)]

use std::raw::{self, Repr};

let slice: &[u16] = &[1, 2, 3, 4];

let repr: raw::Slice<u16> = slice.repr();
println!("data pointer = {:?}, length = {}", repr.data, repr.len);

Fields

data	Unstable (raw #27751)
len	Unstable (raw #27751)

Trait Implementations

impl<T> Copy for Slice<T>

impl<T> Clone for Slice<T>

fn clone(&self) -> Slice<T>

fn clone_from(&mut self, source: &Self)