Function revm::precompile::primitives::bitvec::ptr::eq

source · 
pub fn eq<T1, T2, O>(
    this: BitPtr<Const, T1, O>,
    that: BitPtr<Const, T2, O>
) -> bool
where
    T1: BitStore,
    T2: BitStore,
    O: BitOrder,
Expand description

§Bit-Pointer Equality

This compares two bit-pointers for equality by their address value, not by the value of their referent bit. This does not dereference either.

§Original

ptr::eq

§API Differences

The two bit-pointers can differ in their storage type parameters. bitvec defines pointer equality only between pointers with the same underlying BitStore::Mem element type. Numerically-equal bit-pointers with different integer types will not compare equal, though this function will compile and accept them.

This cannot compare encoded span poiters. *const BitSlice can be used in the standard-library ptr::eq, and does not need an override.

§Examples

use bitvec::prelude::*;
use bitvec::ptr as bv_ptr;
use core::cell::Cell;

let data = 0u16;
let bare_ptr = BitPtr::<_, _, Lsb0>::from_ref(&data);
let cell_ptr = bare_ptr.cast::<Cell<u16>>();

assert!(bv_ptr::eq(bare_ptr, cell_ptr));

let byte_ptr = bare_ptr.cast::<u8>();
assert!(!bv_ptr::eq(bare_ptr, byte_ptr));