usize_cast

Very simply library that allow compile time checked cast from and to usize/isize.

On 64 bits platform it allows:

• u16, u32, u64 into usize
• i16, u16, i32, u32, i64 into isize
• u64, u128, i128 from usize
• i64, i128 from isize

On 32 bits platform it allows:

• u16, u32 into usize
• i16, u16, i32 into isize
• u32, u64, i64, u128, i128 from usize
• i32, i64, i128 from isize

On 16 bits platform it allows:

• u16 into usize
• i16 into isize
• u16, u32, i32, u64, i64, u128, i128 from usize
• i16, i32, i64, i128 from isize

Installation

[dependencies]
usize_cast = "1.0.0"

Usage

use usize_cast::{IntoUsize, FromUsize, IntoIsize, FromIsize};

assert_eq!(1u64.into_usize(), 1usize);
assert_eq!(2i64.into_isize(), 2isize);
assert_eq!(3i64.into_isize(), 3isize);
assert_eq!(1u32.into_usize(), 1usize);
assert_eq!(1u32.into_isize(), 1isize);
assert_eq!(2i32.into_isize(), 2isize);
assert_eq!(3i32.into_isize(), 3isize);
assert_eq!(u64::max_value().into_usize(), usize::max_value());
assert_eq!(i64::max_value().into_isize(), isize::max_value());
assert_eq!(i64::min_value().into_isize(), isize::min_value());

assert_eq!(1u64, u64::from_usize(1usize));
assert_eq!(2i64, i64::from_isize(2isize));
assert_eq!(3i64, i64::from_isize(3isize));
assert_eq!(1u128, u128::from_usize(1usize));
assert_eq!(2i128, i128::from_isize(2isize));
assert_eq!(3i128, i128::from_isize(3isize));
assert_eq!(u64::max_value(), u64::from_usize(usize::max_value()));
assert_eq!(i64::max_value(), i64::from_isize(isize::max_value()));
assert_eq!(i64::min_value(), i64::from_isize(isize::min_value()));