3 use std::num::Wrapping;
5 macro_rules! wrapping_operation {
6 ($result:expr, $lhs:ident $op:tt $rhs:expr) => {
7 assert_eq!($result, $lhs $op $rhs);
8 assert_eq!($result, &$lhs $op $rhs);
9 assert_eq!($result, $lhs $op &$rhs);
10 assert_eq!($result, &$lhs $op &$rhs);
12 ($result:expr, $op:tt $expr:expr) => {
13 assert_eq!($result, $op $expr);
14 assert_eq!($result, $op &$expr);
18 macro_rules! wrapping_assignment {
19 ($result:expr, $lhs:ident $op:tt $rhs:expr) => {
22 assert_eq!($result, lhs1);
26 assert_eq!($result, lhs2);
30 macro_rules! wrapping_test {
31 ($type:ty, $min:expr, $max:expr) => {
32 let zero: Wrapping<$type> = Wrapping(0);
33 let one: Wrapping<$type> = Wrapping(1);
34 let min: Wrapping<$type> = Wrapping($min);
35 let max: Wrapping<$type> = Wrapping($max);
37 wrapping_operation!(min, max + one);
38 wrapping_assignment!(min, max += one);
39 wrapping_operation!(max, min - one);
40 wrapping_assignment!(max, min -= one);
41 wrapping_operation!(max, max * one);
42 wrapping_assignment!(max, max *= one);
43 wrapping_operation!(max, max / one);
44 wrapping_assignment!(max, max /= one);
45 wrapping_operation!(zero, max % one);
46 wrapping_assignment!(zero, max %= one);
47 wrapping_operation!(zero, zero & max);
48 wrapping_assignment!(zero, zero &= max);
49 wrapping_operation!(max, zero | max);
50 wrapping_assignment!(max, zero |= max);
51 wrapping_operation!(zero, max ^ max);
52 wrapping_assignment!(zero, max ^= max);
53 wrapping_operation!(zero, zero << 1usize);
54 wrapping_assignment!(zero, zero <<= 1usize);
55 wrapping_operation!(zero, zero >> 1usize);
56 wrapping_assignment!(zero, zero >>= 1usize);
57 wrapping_operation!(zero, -zero);
58 wrapping_operation!(max, !min);
63 wrapping_test!(i8, std::i8::MIN, std::i8::MAX);
64 wrapping_test!(i16, std::i16::MIN, std::i16::MAX);
65 wrapping_test!(i32, std::i32::MIN, std::i32::MAX);
66 wrapping_test!(i64, std::i64::MIN, std::i64::MAX);
67 #[cfg(not(target_os = "emscripten"))]
68 wrapping_test!(i128, std::i128::MIN, std::i128::MAX);
69 wrapping_test!(isize, std::isize::MIN, std::isize::MAX);
70 wrapping_test!(u8, std::u8::MIN, std::u8::MAX);
71 wrapping_test!(u16, std::u16::MIN, std::u16::MAX);
72 wrapping_test!(u32, std::u32::MIN, std::u32::MAX);
73 wrapping_test!(u64, std::u64::MIN, std::u64::MAX);
74 #[cfg(not(target_os = "emscripten"))]
75 wrapping_test!(u128, std::u128::MIN, std::u128::MAX);
76 wrapping_test!(usize, std::usize::MIN, std::usize::MAX);