Trait without_alloc::alloc::LocalAllocLeakExt

pub trait LocalAllocLeakExt<'alloc>: LocalAlloc<'alloc> {
    fn alloc_layout(
        &'alloc self, 
        layout: NonZeroLayout
    ) -> Option<LeakedAllocation<'alloc>> { ... }
    fn alloc_t<V>(&'alloc self) -> Option<LeakedAllocation<'alloc, V>> { ... }
    fn boxed<V>(&'alloc self, val: V) -> Option<Box<'alloc, V>> { ... }
    fn fixed_vec<V>(
        &'alloc self, 
        capacity: usize
    ) -> Option<FixedVec<'alloc, V>> { ... }
    fn rc<V>(&'alloc self, val: V) -> Option<Rc<'alloc, V>> { ... }
}

Leak allocations into uninit regions.

Provided methods

fn alloc_layout(
    &'alloc self,
    layout: NonZeroLayout
) -> Option<LeakedAllocation<'alloc>>

Leak an allocation with detailed layout.

Provides an Uninit wrapping several aspects of initialization in a safe interface, bound by the lifetime of the reference to the allocator.

fn alloc_t<V>(&'alloc self) -> Option<LeakedAllocation<'alloc, V>>

Leak an allocation for a specific type.

It is not yet initialized but provides a safe interface for that initialization. Note that the type can be a ZST in which case a dangling pointer is substituted for the true allocation.

Usage

use core::cell::{Ref, RefCell};

let slab: Bump<[Ref<'static, usize>; 1]> = Bump::uninit();
let data = RefCell::new(0xff);

// We can place a `Ref` here but we did not yet.
let alloc = slab.alloc_t::<Ref<usize>>().unwrap();
let cell_ref = alloc.uninit.init(data.borrow());

assert_eq!(**cell_ref, 0xff);

fn boxed<V>(&'alloc self, val: V) -> Option<Box<'alloc, V>>

Allocate a Box.

This will allocate some memory with the correct layout for a Box, then place the provided value into the allocation by constructing an Box.

fn fixed_vec<V>(&'alloc self, capacity: usize) -> Option<FixedVec<'alloc, V>>

Allocate a FixedVec.

This will allocate some memory with the correct layout for a FixedVec of the given capacity (in elements) and wrap it. Returns None if it is not possible to allocate the layout.

fn rc<V>(&'alloc self, val: V) -> Option<Rc<'alloc, V>>

Allocate an Rc.

This will allocate some memory with the correct layout for an Rc, then place the provided value into the allocation by constructing an Rc.

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Implementors

impl<'alloc, T> LocalAllocLeakExt<'alloc> for T where
    T: LocalAlloc<'alloc>, 

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