bumpalo 3.4.0

A fast bump allocation arena for Rust.
Documentation 
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#![cfg(not(debug_assertions))]

// All of these alloc_with tests will fail with "fatal runtime error: stack overflow" unless LLVM
// manages to optimize the stack writes away.
//
// We only run them when debug_assertions are not set, as we expect them to fail outside release
// mode.

use bumpalo::Bump;

#[test]
fn alloc_with_large_array() {
    let b = Bump::new();

    b.alloc_with(|| [4u8; 10_000_000]);
}

#[allow(dead_code)]
struct LargeStruct {
    small: usize,
    big1: [u8; 20_000_000],
    big2: [u8; 20_000_000],
    big3: [u8; 20_000_000],
}

#[test]
fn alloc_with_large_struct() {
    let b = Bump::new();

    b.alloc_with(|| LargeStruct {
        small: 1,
        big1: [2; 20_000_000],
        big2: [3; 20_000_000],
        big3: [4; 20_000_000],
    });
}

#[test]
fn alloc_with_large_tuple() {
    let b = Bump::new();

    b.alloc_with(|| {
        (
            1u32,
            LargeStruct {
                small: 2,
                big1: [3; 20_000_000],
                big2: [4; 20_000_000],
                big3: [5; 20_000_000],
            },
        )
    });
}

enum LargeEnum {
    Small,
    #[allow(dead_code)]
    Large([u8; 10_000_000]),
}

#[test]
fn alloc_with_large_enum() {
    let b = Bump::new();

    b.alloc_with(|| LargeEnum::Small);
}