Struct std::raw::Slice
[−]
[src]
pub struct Slice<T> {
pub data: *const T,
pub len: usize,
}: use raw accessors/constructors in slice module
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_partsorstd::slice::from_raw_parts_mutinstead ofstd::mem::transmuteing a value of typeSlice. - Extracting the data pointer and length from a slice can be
performed with the
as_ptr(oras_mut_ptr) andlenmethods.
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 | Deprecated since 1.9.0 : use raw accessors/constructors in |
len | Deprecated since 1.9.0 : use raw accessors/constructors in |