Rust isize

// The size of isize is guaranteed to match the size of a raw pointer
assert_eq!(
    std::mem::size_of::<isize>(),
    std::mem::size_of::<*const ()>()
);

// Variable declaration
let offset: isize = -150;

let min_val: isize = isize::MIN;
let max_val: isize = isize::MAX;

let arch_dependent_val: isize = 42;

// Lossless on 16-bit and 32-bit architectures; 
// truncates the upper 32 bits on 64-bit architectures
let fixed_32: i32 = arch_dependent_val as i32;

// Lossless on 64-bit architectures; 
// sign-extends the value on 16-bit and 32-bit architectures
let fixed_64: i64 = arch_dependent_val as i64; 

use std::convert::TryInto;

let val: isize = isize::MAX;

// Returns Ok(val) on 16-bit and 32-bit architectures, 
// but returns Err(TryFromIntError) on 64-bit architectures 
// because 64-bit isize::MAX exceeds i32::MAX.
let safe_cast: Result<i32, _> = val.try_into();