Module malachite_nz::integer::conversion::primitive_int_from_integer

Implementations of traits for converting an Integer to a primitive integer.

The traits are CheckedFrom, ConvertibleFrom, OverflowingFrom, SaturatingFrom, and WrappingFrom.

checked_from

extern crate malachite_base;

use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::conversion::traits::CheckedFrom;
use malachite_nz::integer::Integer;

assert_eq!(u32::checked_from(&Integer::from(123)), Some(123));
assert_eq!(u32::checked_from(&Integer::from(-123)), None);
assert_eq!(u32::checked_from(&Integer::from(10u32).pow(12)), None);
assert_eq!(u32::checked_from(&-Integer::from(10u32).pow(12)), None);

assert_eq!(i32::checked_from(&Integer::from(123)), Some(123));
assert_eq!(i32::checked_from(&Integer::from(-123)), Some(-123));
assert_eq!(i32::checked_from(&Integer::from(10u32).pow(12)), None);
assert_eq!(i32::checked_from(&-Integer::from(10u32).pow(12)), None);

wrapping_from

extern crate malachite_base;

use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::conversion::traits::WrappingFrom;
use malachite_nz::integer::Integer;

assert_eq!(u32::wrapping_from(&Integer::from(123)), 123);
assert_eq!(u32::wrapping_from(&Integer::from(-123)), 4294967173);
assert_eq!(u32::wrapping_from(&Integer::from(10u32).pow(12)), 3567587328);
assert_eq!(u32::wrapping_from(&-Integer::from(10u32).pow(12)), 727379968);

assert_eq!(i32::wrapping_from(&Integer::from(123)), 123);
assert_eq!(i32::wrapping_from(&Integer::from(-123)), -123);
assert_eq!(i32::wrapping_from(&Integer::from(10u32).pow(12)), -727379968);
assert_eq!(i32::wrapping_from(&-Integer::from(10u32).pow(12)), 727379968);

saturating_from

extern crate malachite_base;

use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::conversion::traits::SaturatingFrom;
use malachite_nz::integer::Integer;

assert_eq!(u32::saturating_from(&Integer::from(123)), 123);
assert_eq!(u32::saturating_from(&Integer::from(-123)), 0);
assert_eq!(u32::saturating_from(&Integer::from(10u32).pow(12)), u32::MAX);
assert_eq!(u32::saturating_from(&-Integer::from(10u32).pow(12)), 0);

assert_eq!(i32::saturating_from(&Integer::from(123)), 123);
assert_eq!(i32::saturating_from(&Integer::from(-123)), -123);
assert_eq!(i32::saturating_from(&Integer::from(10u32).pow(12)), 2147483647);
assert_eq!(i32::saturating_from(&-Integer::from(10u32).pow(12)), -2147483648);

overflowing_from

extern crate malachite_base;

use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::conversion::traits::OverflowingFrom;
use malachite_nz::integer::Integer;

assert_eq!(u32::overflowing_from(&Integer::from(123)), (123, false));
assert_eq!(u32::overflowing_from(&Integer::from(-123)), (4294967173, true));
assert_eq!(u32::overflowing_from(&Integer::from(10u32).pow(12)), (3567587328, true));
assert_eq!(u32::overflowing_from(&-Integer::from(10u32).pow(12)), (727379968, true));

assert_eq!(i32::overflowing_from(&Integer::from(123)), (123, false));
assert_eq!(i32::overflowing_from(&Integer::from(-123)), (-123, false));
assert_eq!(i32::overflowing_from(&Integer::from(10u32).pow(12)), (-727379968, true));
assert_eq!(i32::overflowing_from(&-Integer::from(10u32).pow(12)), (727379968, true));

convertible_from

extern crate malachite_base;

use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::conversion::traits::ConvertibleFrom;
use malachite_nz::integer::Integer;

assert_eq!(u32::convertible_from(&Integer::from(123)), true);
assert_eq!(u32::convertible_from(&Integer::from(-123)), false);
assert_eq!(u32::convertible_from(&Integer::from(10u32).pow(12)), false);
assert_eq!(u32::convertible_from(&-Integer::from(10u32).pow(12)), false);

assert_eq!(i32::convertible_from(&Integer::from(123)), true);
assert_eq!(i32::convertible_from(&Integer::from(-123)), true);
assert_eq!(i32::convertible_from(&Integer::from(10u32).pow(12)), false);
assert_eq!(i32::convertible_from(&-Integer::from(10u32).pow(12)), false);