Struct rustc_arena_modified::dropless_arena::DroplessArena

pub struct DroplessArena { /* private fields */ }

An arena that can hold objects of multiple different types that impl Copy and/or satisfy !mem::needs_drop.

Implementations

impl DroplessArena

pub fn alloc_raw(&self, layout: Layout) -> *mut u8

Allocates a raw region of data

pub fn alloc<T>(&self, object: T) -> &mut T

Allocates an object which doesn’t need to be dropped.

Panics if given a type with drop code. This method’s signature looks like it can allocate any object, but it asserts ![needs_drop] at runtime.

pub fn alloc_from_iter<T, I: IntoIterator<Item = T>>(&self, iter: I) -> &mut [T]

Allocates an iterator of objects which don’t need to be dropped.

Panics if you try to allocate ZSTs. Additionally, like with Self::alloc, this panics if you allocate an object with drop code.

pub fn alloc_slice<T: Copy>(&self, slice: &[T]) -> &mut [T]

Allocates a slice of objects that are copied into the DroplessArena, returning a mutable reference to it.

This will panic if passed a zero-sized type or empty slice. Like Self::alloc, it can’t be given a type with drop code, but the T: Copy trait checks this at compile time.

Trait Implementations

impl Default for DroplessArena

fn default() -> Self

Create a new, empty arena

impl Send for DroplessArena