pub struct ThinBox<T> where
    T: ?Sized
{ ptr: WithHeader<<T as Pointee>::Metadata>, _marker: PhantomData<T>, }
🔬 This is a nightly-only experimental API. (thin_box)
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));

Fields

ptr: WithHeader<<T as Pointee>::Metadata>
🔬 This is a nightly-only experimental API. (thin_box)
_marker: PhantomData<T>
🔬 This is a nightly-only experimental API. (thin_box)

Implementations

🔬 This is a nightly-only experimental API. (thin_box)

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)

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]);

Trait Implementations

Formats the value using the given formatter. Read more

The resulting type after dereferencing.

Dereferences the value.

Mutably dereferences the value.

Formats the value using the given formatter. Read more

Executes the destructor for this type. Read more

The lower-level source of this error, if any. Read more

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred. 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

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.