Expand description
Implementations of traits for converting a Natural to a primitive
integer.
The traits are TryFrom,
ConvertibleFrom,
OverflowingFrom,
SaturatingFrom, and
WrappingFrom.
§try_from
use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::basic::traits::One;
use malachite_nz::natural::conversion::primitive_int_from_natural::{
SignedFromNaturalError,
UnsignedFromNaturalError
};
use malachite_nz::natural::Natural;
assert_eq!(u32::try_from(&Natural::from(123u32)), Ok(123));
assert_eq!(u32::try_from(&Natural::from(10u32).pow(12)), Err(UnsignedFromNaturalError));
assert_eq!(u8::try_from(&Natural::from(123u32)), Ok(123));
assert_eq!(u8::try_from(&Natural::from(10u32).pow(12)), Err(UnsignedFromNaturalError));
assert_eq!(u64::try_from(&Natural::from(123u32)), Ok(123));
assert_eq!(u64::try_from(&(Natural::ONE << 100)), Err(UnsignedFromNaturalError));
assert_eq!(i32::try_from(&Natural::from(123u32)), Ok(123));
assert_eq!(i32::try_from(&Natural::from(10u32).pow(12)), Err(SignedFromNaturalError));
assert_eq!(i8::try_from(&Natural::from(123u32)), Ok(123));
assert_eq!(i8::try_from(&Natural::from(10u32).pow(12)), Err(SignedFromNaturalError));
assert_eq!(i64::try_from(&Natural::from(123u32)), Ok(123));
assert_eq!(i64::try_from(&(Natural::ONE << 100)), Err(SignedFromNaturalError));§wrapping_from
use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::basic::traits::One;
use malachite_base::num::conversion::traits::WrappingFrom;
use malachite_nz::natural::Natural;
assert_eq!(u32::wrapping_from(&Natural::from(123u32)), 123);
assert_eq!(u32::wrapping_from(&Natural::from(10u32).pow(12)), 3567587328);
assert_eq!(u8::wrapping_from(&Natural::from(123u32)), 123);
assert_eq!(u8::wrapping_from(&Natural::from(10u32).pow(12)), 0);
assert_eq!(u64::wrapping_from(&Natural::from(123u32)), 123);
assert_eq!(u64::wrapping_from(&(Natural::ONE << 100)), 0);
assert_eq!(i32::wrapping_from(&Natural::from(123u32)), 123);
assert_eq!(i32::wrapping_from(&Natural::from(10u32).pow(12)), -727379968);
assert_eq!(i8::wrapping_from(&Natural::from(123u32)), 123);
assert_eq!(i8::wrapping_from(&Natural::from(10u32).pow(12)), 0);
assert_eq!(i64::wrapping_from(&Natural::from(123u32)), 123);
assert_eq!(i64::wrapping_from(&(Natural::ONE << 100)), 0);§saturating_from
use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::basic::traits::One;
use malachite_base::num::conversion::traits::SaturatingFrom;
use malachite_nz::natural::Natural;
assert_eq!(u32::saturating_from(&Natural::from(123u32)), 123);
assert_eq!(u32::saturating_from(&Natural::from(10u32).pow(12)), u32::MAX);
assert_eq!(u8::saturating_from(&Natural::from(123u32)), 123);
assert_eq!(u8::saturating_from(&Natural::from(10u32).pow(12)), 255);
assert_eq!(u64::saturating_from(&Natural::from(123u32)), 123);
assert_eq!(u64::saturating_from(&(Natural::ONE << 100)), 18446744073709551615);
assert_eq!(i32::saturating_from(&Natural::from(123u32)), 123);
assert_eq!(i32::saturating_from(&Natural::from(10u32).pow(12)), 2147483647);
assert_eq!(i8::saturating_from(&Natural::from(123u32)), 123);
assert_eq!(i8::saturating_from(&Natural::from(10u32).pow(12)), 127);
assert_eq!(i64::saturating_from(&Natural::from(123u32)), 123);
assert_eq!(i64::saturating_from(&(Natural::ONE << 100)), 9223372036854775807);§overflowing_from
use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::basic::traits::One;
use malachite_base::num::conversion::traits::OverflowingFrom;
use malachite_nz::natural::Natural;
assert_eq!(u32::overflowing_from(&Natural::from(123u32)), (123, false));
assert_eq!(u32::overflowing_from(&Natural::from(10u32).pow(12)), (3567587328, true));
assert_eq!(u8::overflowing_from(&Natural::from(123u32)), (123, false));
assert_eq!(u8::overflowing_from(&Natural::from(10u32).pow(12)), (0, true));
assert_eq!(u64::overflowing_from(&Natural::from(123u32)), (123, false));
assert_eq!(u64::overflowing_from(&(Natural::ONE << 100)), (0, true));
assert_eq!(i32::overflowing_from(&Natural::from(123u32)), (123, false));
assert_eq!(i32::overflowing_from(&Natural::from(10u32).pow(12)), (-727379968, true));
assert_eq!(i8::overflowing_from(&Natural::from(123u32)), (123, false));
assert_eq!(i8::overflowing_from(&Natural::from(10u32).pow(12)), (0, true));
assert_eq!(i64::overflowing_from(&Natural::from(123u32)), (123, false));
assert_eq!(i64::overflowing_from(&(Natural::ONE << 100)), (0, true));§convertible_from
use malachite_base::num::arithmetic::traits::Pow;
use malachite_base::num::basic::traits::One;
use malachite_base::num::conversion::traits::ConvertibleFrom;
use malachite_nz::natural::Natural;
assert_eq!(u32::convertible_from(&Natural::from(123u32)), true);
assert_eq!(u32::convertible_from(&Natural::from(10u32).pow(12)), false);
assert_eq!(u8::convertible_from(&Natural::from(123u32)), true);
assert_eq!(u8::convertible_from(&Natural::from(10u32).pow(12)), false);
assert_eq!(u64::convertible_from(&Natural::from(123u32)), true);
assert_eq!(u64::convertible_from(&(Natural::ONE << 100)), false);
assert_eq!(i32::convertible_from(&Natural::from(123u32)), true);
assert_eq!(i32::convertible_from(&Natural::from(10u32).pow(12)), false);
assert_eq!(i8::convertible_from(&Natural::from(123u32)), true);
assert_eq!(i8::convertible_from(&Natural::from(10u32).pow(12)), false);
assert_eq!(i64::convertible_from(&Natural::from(123u32)), true);
assert_eq!(i64::convertible_from(&(Natural::ONE << 100)), false);