ThinBox in std::boxed - Rust (original) (raw)
pub struct ThinBox<T>
where
T: ?Sized,
{ /* private fields */ }🔬This is a nightly-only experimental API. (thin_box #92791)
Expand description
ThinBox.
A thin pointer for heap allocation, regardless of T.
§Examples
#![feature(thin_box)]
use std::boxed::ThinBox;
let five = ThinBox::new(5);
let thin_slice = ThinBox::<[i32]>::new_unsize([1, 2, 3, 4]);
use std::mem::{size_of, size_of_val};
let size_of_ptr = size_of::<*const ()>();
assert_eq!(size_of_ptr, size_of_val(&five));
assert_eq!(size_of_ptr, size_of_val(&thin_slice));🔬This is a nightly-only experimental API. (thin_box #92791)
Moves a type to the heap with its Metadata stored in the heap allocation instead of on the stack.
§Examples
#![feature(thin_box)]
use std::boxed::ThinBox;
let five = ThinBox::new(5);🔬This is a nightly-only experimental API. (thin_box #92791)
Moves a type to the heap with its Metadata stored in the heap allocation instead of on the stack. Returns an error if allocation fails, instead of aborting.
§Examples
#![feature(allocator_api)]
#![feature(thin_box)]
use std::boxed::ThinBox;
let five = ThinBox::try_new(5)?;🔬This is a nightly-only experimental API. (thin_box #92791)
Moves a type to the heap with its Metadata stored in the heap allocation instead of on the stack.
§Examples
#![feature(thin_box)]
use std::boxed::ThinBox;
let thin_slice = ThinBox::<[i32]>::new_unsize([1, 2, 3, 4]);The resulting type after dereferencing.
Dereferences the value.
Mutably dereferences the value.
Returns the lower-level source of this error, if any. Read more
👎Deprecated since 1.42.0: use the Display impl or to_string()
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
Provides type-based access to context intended for error reports. Read more
ThinBox<T> is Send if T is Send because the data is owned.
ThinBox<T> is Sync if T is Sync because the data is owned.