Struct Borrowed

pub struct Borrowed<B> { /* private fields */ }

A type generated by Holder that wraps a value in it shallowly.

This struct implements Deref and DerefMut for the inner value so that clients can use this struct like the inner value.

If check feature is enabled, this struct tracks borrow status at runtime, and will warn you if borrow rule was violated.

Implementations

impl<B> Borrowed<B>

pub fn map<T>(self, f: impl FnOnce(B) -> T) -> Borrowed<T>

Converts inner value through the given function while maintaining borrow state.

Examples

use my_ecs::ds::Holder;

let holder = unsafe { Holder::new(0, |v| v, |v| v) };
let value = holder.borrow().unwrap();
let value = value.map(|v| v.to_string());

Trait Implementations

impl<B: Debug> Debug for Borrowed<B>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<B> Deref for Borrowed<B>

type Target = B

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<B> DerefMut for Borrowed<B>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<B> Drop for Borrowed<B>

fn drop(&mut self)

Executes the destructor for this type.