| macro_rules! int_module { |
| ($T:ident) => { |
| #[cfg(test)] |
| mod tests { |
| use core::ops::{BitAnd, BitOr, BitXor, Not, Shl, Shr}; |
| use core::$T::*; |
| |
| use crate::num; |
| |
| #[test] |
| fn test_overflows() { |
| assert!(MAX > 0); |
| assert!(MIN <= 0); |
| assert_eq!(MIN + MAX + 1, 0); |
| } |
| |
| #[test] |
| fn test_num() { |
| num::test_num(10 as $T, 2 as $T); |
| } |
| |
| #[test] |
| fn test_rem_euclid() { |
| assert_eq!((-1 as $T).rem_euclid(MIN), MAX); |
| } |
| |
| #[test] |
| pub fn test_abs() { |
| assert_eq!((1 as $T).abs(), 1 as $T); |
| assert_eq!((0 as $T).abs(), 0 as $T); |
| assert_eq!((-1 as $T).abs(), 1 as $T); |
| } |
| |
| #[test] |
| fn test_signum() { |
| assert_eq!((1 as $T).signum(), 1 as $T); |
| assert_eq!((0 as $T).signum(), 0 as $T); |
| assert_eq!((-0 as $T).signum(), 0 as $T); |
| assert_eq!((-1 as $T).signum(), -1 as $T); |
| } |
| |
| #[test] |
| fn test_is_positive() { |
| assert!((1 as $T).is_positive()); |
| assert!(!(0 as $T).is_positive()); |
| assert!(!(-0 as $T).is_positive()); |
| assert!(!(-1 as $T).is_positive()); |
| } |
| |
| #[test] |
| fn test_is_negative() { |
| assert!(!(1 as $T).is_negative()); |
| assert!(!(0 as $T).is_negative()); |
| assert!(!(-0 as $T).is_negative()); |
| assert!((-1 as $T).is_negative()); |
| } |
| |
| #[test] |
| fn test_bitwise_operators() { |
| assert_eq!(0b1110 as $T, (0b1100 as $T).bitor(0b1010 as $T)); |
| assert_eq!(0b1000 as $T, (0b1100 as $T).bitand(0b1010 as $T)); |
| assert_eq!(0b0110 as $T, (0b1100 as $T).bitxor(0b1010 as $T)); |
| assert_eq!(0b1110 as $T, (0b0111 as $T).shl(1)); |
| assert_eq!(0b0111 as $T, (0b1110 as $T).shr(1)); |
| assert_eq!(-(0b11 as $T) - (1 as $T), (0b11 as $T).not()); |
| } |
| |
| const A: $T = 0b0101100; |
| const B: $T = 0b0100001; |
| const C: $T = 0b1111001; |
| |
| const _0: $T = 0; |
| const _1: $T = !0; |
| |
| #[test] |
| fn test_count_ones() { |
| assert_eq!(A.count_ones(), 3); |
| assert_eq!(B.count_ones(), 2); |
| assert_eq!(C.count_ones(), 5); |
| } |
| |
| #[test] |
| fn test_count_zeros() { |
| assert_eq!(A.count_zeros(), $T::BITS - 3); |
| assert_eq!(B.count_zeros(), $T::BITS - 2); |
| assert_eq!(C.count_zeros(), $T::BITS - 5); |
| } |
| |
| #[test] |
| fn test_leading_trailing_ones() { |
| let a: $T = 0b0101_1111; |
| assert_eq!(a.trailing_ones(), 5); |
| assert_eq!((!a).leading_ones(), $T::BITS - 7); |
| |
| assert_eq!(a.reverse_bits().leading_ones(), 5); |
| |
| assert_eq!(_1.leading_ones(), $T::BITS); |
| assert_eq!(_1.trailing_ones(), $T::BITS); |
| |
| assert_eq!((_1 << 1).trailing_ones(), 0); |
| assert_eq!(MAX.leading_ones(), 0); |
| |
| assert_eq!((_1 << 1).leading_ones(), $T::BITS - 1); |
| assert_eq!(MAX.trailing_ones(), $T::BITS - 1); |
| |
| assert_eq!(_0.leading_ones(), 0); |
| assert_eq!(_0.trailing_ones(), 0); |
| |
| let x: $T = 0b0010_1100; |
| assert_eq!(x.leading_ones(), 0); |
| assert_eq!(x.trailing_ones(), 0); |
| } |
| |
| #[test] |
| fn test_rotate() { |
| assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A); |
| assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B); |
| assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C); |
| |
| // Rotating these should make no difference |
| // |
| // We test using 124 bits because to ensure that overlong bit shifts do |
| // not cause undefined behaviour. See #10183. |
| assert_eq!(_0.rotate_left(124), _0); |
| assert_eq!(_1.rotate_left(124), _1); |
| assert_eq!(_0.rotate_right(124), _0); |
| assert_eq!(_1.rotate_right(124), _1); |
| |
| // Rotating by 0 should have no effect |
| assert_eq!(A.rotate_left(0), A); |
| assert_eq!(B.rotate_left(0), B); |
| assert_eq!(C.rotate_left(0), C); |
| // Rotating by a multiple of word size should also have no effect |
| assert_eq!(A.rotate_left(128), A); |
| assert_eq!(B.rotate_left(128), B); |
| assert_eq!(C.rotate_left(128), C); |
| } |
| |
| #[test] |
| fn test_swap_bytes() { |
| assert_eq!(A.swap_bytes().swap_bytes(), A); |
| assert_eq!(B.swap_bytes().swap_bytes(), B); |
| assert_eq!(C.swap_bytes().swap_bytes(), C); |
| |
| // Swapping these should make no difference |
| assert_eq!(_0.swap_bytes(), _0); |
| assert_eq!(_1.swap_bytes(), _1); |
| } |
| |
| #[test] |
| fn test_le() { |
| assert_eq!($T::from_le(A.to_le()), A); |
| assert_eq!($T::from_le(B.to_le()), B); |
| assert_eq!($T::from_le(C.to_le()), C); |
| assert_eq!($T::from_le(_0), _0); |
| assert_eq!($T::from_le(_1), _1); |
| assert_eq!(_0.to_le(), _0); |
| assert_eq!(_1.to_le(), _1); |
| } |
| |
| #[test] |
| fn test_be() { |
| assert_eq!($T::from_be(A.to_be()), A); |
| assert_eq!($T::from_be(B.to_be()), B); |
| assert_eq!($T::from_be(C.to_be()), C); |
| assert_eq!($T::from_be(_0), _0); |
| assert_eq!($T::from_be(_1), _1); |
| assert_eq!(_0.to_be(), _0); |
| assert_eq!(_1.to_be(), _1); |
| } |
| |
| #[test] |
| fn test_signed_checked_div() { |
| assert_eq!((10 as $T).checked_div(2), Some(5)); |
| assert_eq!((5 as $T).checked_div(0), None); |
| assert_eq!(isize::MIN.checked_div(-1), None); |
| } |
| |
| #[test] |
| fn test_saturating_abs() { |
| assert_eq!((0 as $T).saturating_abs(), 0); |
| assert_eq!((123 as $T).saturating_abs(), 123); |
| assert_eq!((-123 as $T).saturating_abs(), 123); |
| assert_eq!((MAX - 2).saturating_abs(), MAX - 2); |
| assert_eq!((MAX - 1).saturating_abs(), MAX - 1); |
| assert_eq!(MAX.saturating_abs(), MAX); |
| assert_eq!((MIN + 2).saturating_abs(), MAX - 1); |
| assert_eq!((MIN + 1).saturating_abs(), MAX); |
| assert_eq!(MIN.saturating_abs(), MAX); |
| } |
| |
| #[test] |
| fn test_saturating_neg() { |
| assert_eq!((0 as $T).saturating_neg(), 0); |
| assert_eq!((123 as $T).saturating_neg(), -123); |
| assert_eq!((-123 as $T).saturating_neg(), 123); |
| assert_eq!((MAX - 2).saturating_neg(), MIN + 3); |
| assert_eq!((MAX - 1).saturating_neg(), MIN + 2); |
| assert_eq!(MAX.saturating_neg(), MIN + 1); |
| assert_eq!((MIN + 2).saturating_neg(), MAX - 1); |
| assert_eq!((MIN + 1).saturating_neg(), MAX); |
| assert_eq!(MIN.saturating_neg(), MAX); |
| } |
| |
| #[test] |
| fn test_from_str() { |
| fn from_str<T: std::str::FromStr>(t: &str) -> Option<T> { |
| std::str::FromStr::from_str(t).ok() |
| } |
| assert_eq!(from_str::<$T>("0"), Some(0 as $T)); |
| assert_eq!(from_str::<$T>("3"), Some(3 as $T)); |
| assert_eq!(from_str::<$T>("10"), Some(10 as $T)); |
| assert_eq!(from_str::<i32>("123456789"), Some(123456789 as i32)); |
| assert_eq!(from_str::<$T>("00100"), Some(100 as $T)); |
| |
| assert_eq!(from_str::<$T>("-1"), Some(-1 as $T)); |
| assert_eq!(from_str::<$T>("-3"), Some(-3 as $T)); |
| assert_eq!(from_str::<$T>("-10"), Some(-10 as $T)); |
| assert_eq!(from_str::<i32>("-123456789"), Some(-123456789 as i32)); |
| assert_eq!(from_str::<$T>("-00100"), Some(-100 as $T)); |
| |
| assert_eq!(from_str::<$T>(""), None); |
| assert_eq!(from_str::<$T>(" "), None); |
| assert_eq!(from_str::<$T>("x"), None); |
| } |
| |
| #[test] |
| fn test_from_str_radix() { |
| assert_eq!($T::from_str_radix("123", 10), Ok(123 as $T)); |
| assert_eq!($T::from_str_radix("1001", 2), Ok(9 as $T)); |
| assert_eq!($T::from_str_radix("123", 8), Ok(83 as $T)); |
| assert_eq!(i32::from_str_radix("123", 16), Ok(291 as i32)); |
| assert_eq!(i32::from_str_radix("ffff", 16), Ok(65535 as i32)); |
| assert_eq!(i32::from_str_radix("FFFF", 16), Ok(65535 as i32)); |
| assert_eq!($T::from_str_radix("z", 36), Ok(35 as $T)); |
| assert_eq!($T::from_str_radix("Z", 36), Ok(35 as $T)); |
| |
| assert_eq!($T::from_str_radix("-123", 10), Ok(-123 as $T)); |
| assert_eq!($T::from_str_radix("-1001", 2), Ok(-9 as $T)); |
| assert_eq!($T::from_str_radix("-123", 8), Ok(-83 as $T)); |
| assert_eq!(i32::from_str_radix("-123", 16), Ok(-291 as i32)); |
| assert_eq!(i32::from_str_radix("-ffff", 16), Ok(-65535 as i32)); |
| assert_eq!(i32::from_str_radix("-FFFF", 16), Ok(-65535 as i32)); |
| assert_eq!($T::from_str_radix("-z", 36), Ok(-35 as $T)); |
| assert_eq!($T::from_str_radix("-Z", 36), Ok(-35 as $T)); |
| |
| assert_eq!($T::from_str_radix("Z", 35).ok(), None::<$T>); |
| assert_eq!($T::from_str_radix("-9", 2).ok(), None::<$T>); |
| } |
| |
| #[test] |
| fn test_pow() { |
| let mut r = 2 as $T; |
| assert_eq!(r.pow(2), 4 as $T); |
| assert_eq!(r.pow(0), 1 as $T); |
| assert_eq!(r.wrapping_pow(2), 4 as $T); |
| assert_eq!(r.wrapping_pow(0), 1 as $T); |
| assert_eq!(r.checked_pow(2), Some(4 as $T)); |
| assert_eq!(r.checked_pow(0), Some(1 as $T)); |
| assert_eq!(r.overflowing_pow(2), (4 as $T, false)); |
| assert_eq!(r.overflowing_pow(0), (1 as $T, false)); |
| assert_eq!(r.saturating_pow(2), 4 as $T); |
| assert_eq!(r.saturating_pow(0), 1 as $T); |
| |
| r = MAX; |
| // use `^` to represent .pow() with no overflow. |
| // if itest::MAX == 2^j-1, then itest is a `j` bit int, |
| // so that `itest::MAX*itest::MAX == 2^(2*j)-2^(j+1)+1`, |
| // thussaturating_pow the overflowing result is exactly 1. |
| assert_eq!(r.wrapping_pow(2), 1 as $T); |
| assert_eq!(r.checked_pow(2), None); |
| assert_eq!(r.overflowing_pow(2), (1 as $T, true)); |
| assert_eq!(r.saturating_pow(2), MAX); |
| //test for negative exponent. |
| r = -2 as $T; |
| assert_eq!(r.pow(2), 4 as $T); |
| assert_eq!(r.pow(3), -8 as $T); |
| assert_eq!(r.pow(0), 1 as $T); |
| assert_eq!(r.wrapping_pow(2), 4 as $T); |
| assert_eq!(r.wrapping_pow(3), -8 as $T); |
| assert_eq!(r.wrapping_pow(0), 1 as $T); |
| assert_eq!(r.checked_pow(2), Some(4 as $T)); |
| assert_eq!(r.checked_pow(3), Some(-8 as $T)); |
| assert_eq!(r.checked_pow(0), Some(1 as $T)); |
| assert_eq!(r.overflowing_pow(2), (4 as $T, false)); |
| assert_eq!(r.overflowing_pow(3), (-8 as $T, false)); |
| assert_eq!(r.overflowing_pow(0), (1 as $T, false)); |
| assert_eq!(r.saturating_pow(2), 4 as $T); |
| assert_eq!(r.saturating_pow(3), -8 as $T); |
| assert_eq!(r.saturating_pow(0), 1 as $T); |
| } |
| |
| #[test] |
| fn test_div_floor() { |
| let a: $T = 8; |
| let b = 3; |
| assert_eq!(a.div_floor(b), 2); |
| assert_eq!(a.div_floor(-b), -3); |
| assert_eq!((-a).div_floor(b), -3); |
| assert_eq!((-a).div_floor(-b), 2); |
| } |
| |
| #[test] |
| fn test_div_ceil() { |
| let a: $T = 8; |
| let b = 3; |
| assert_eq!(a.div_ceil(b), 3); |
| assert_eq!(a.div_ceil(-b), -2); |
| assert_eq!((-a).div_ceil(b), -2); |
| assert_eq!((-a).div_ceil(-b), 3); |
| } |
| |
| #[test] |
| fn test_next_multiple_of() { |
| assert_eq!((16 as $T).next_multiple_of(8), 16); |
| assert_eq!((23 as $T).next_multiple_of(8), 24); |
| assert_eq!((16 as $T).next_multiple_of(-8), 16); |
| assert_eq!((23 as $T).next_multiple_of(-8), 16); |
| assert_eq!((-16 as $T).next_multiple_of(8), -16); |
| assert_eq!((-23 as $T).next_multiple_of(8), -16); |
| assert_eq!((-16 as $T).next_multiple_of(-8), -16); |
| assert_eq!((-23 as $T).next_multiple_of(-8), -24); |
| assert_eq!(MIN.next_multiple_of(-1), MIN); |
| } |
| |
| #[test] |
| fn test_checked_next_multiple_of() { |
| assert_eq!((16 as $T).checked_next_multiple_of(8), Some(16)); |
| assert_eq!((23 as $T).checked_next_multiple_of(8), Some(24)); |
| assert_eq!((16 as $T).checked_next_multiple_of(-8), Some(16)); |
| assert_eq!((23 as $T).checked_next_multiple_of(-8), Some(16)); |
| assert_eq!((-16 as $T).checked_next_multiple_of(8), Some(-16)); |
| assert_eq!((-23 as $T).checked_next_multiple_of(8), Some(-16)); |
| assert_eq!((-16 as $T).checked_next_multiple_of(-8), Some(-16)); |
| assert_eq!((-23 as $T).checked_next_multiple_of(-8), Some(-24)); |
| assert_eq!((1 as $T).checked_next_multiple_of(0), None); |
| assert_eq!(MAX.checked_next_multiple_of(2), None); |
| assert_eq!(MIN.checked_next_multiple_of(-3), None); |
| assert_eq!(MIN.checked_next_multiple_of(-1), Some(MIN)); |
| } |
| |
| #[test] |
| fn test_carrying_add() { |
| assert_eq!($T::MAX.carrying_add(1, false), ($T::MIN, true)); |
| assert_eq!($T::MAX.carrying_add(0, true), ($T::MIN, true)); |
| assert_eq!($T::MAX.carrying_add(1, true), ($T::MIN + 1, true)); |
| assert_eq!($T::MAX.carrying_add(-1, false), ($T::MAX - 1, false)); |
| assert_eq!($T::MAX.carrying_add(-1, true), ($T::MAX, false)); // no intermediate overflow |
| assert_eq!($T::MIN.carrying_add(-1, false), ($T::MAX, true)); |
| assert_eq!($T::MIN.carrying_add(-1, true), ($T::MIN, false)); // no intermediate overflow |
| assert_eq!((0 as $T).carrying_add($T::MAX, true), ($T::MIN, true)); |
| assert_eq!((0 as $T).carrying_add($T::MIN, true), ($T::MIN + 1, false)); |
| } |
| |
| #[test] |
| fn test_borrowing_sub() { |
| assert_eq!($T::MIN.borrowing_sub(1, false), ($T::MAX, true)); |
| assert_eq!($T::MIN.borrowing_sub(0, true), ($T::MAX, true)); |
| assert_eq!($T::MIN.borrowing_sub(1, true), ($T::MAX - 1, true)); |
| assert_eq!($T::MIN.borrowing_sub(-1, false), ($T::MIN + 1, false)); |
| assert_eq!($T::MIN.borrowing_sub(-1, true), ($T::MIN, false)); // no intermediate overflow |
| assert_eq!($T::MAX.borrowing_sub(-1, false), ($T::MIN, true)); |
| assert_eq!($T::MAX.borrowing_sub(-1, true), ($T::MAX, false)); // no intermediate overflow |
| assert_eq!((0 as $T).borrowing_sub($T::MIN, false), ($T::MIN, true)); |
| assert_eq!((0 as $T).borrowing_sub($T::MIN, true), ($T::MAX, false)); |
| } |
| } |
| }; |
| } |
