77 lines
2.7 KiB
Rust
77 lines
2.7 KiB
Rust
use core::num::Wrapping;
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macro_rules! wrapping_operation {
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($result:expr, $lhs:ident $op:tt $rhs:expr) => {
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assert_eq!($result, $lhs $op $rhs);
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assert_eq!($result, &$lhs $op $rhs);
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assert_eq!($result, $lhs $op &$rhs);
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assert_eq!($result, &$lhs $op &$rhs);
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};
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($result:expr, $op:tt $expr:expr) => {
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assert_eq!($result, $op $expr);
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assert_eq!($result, $op &$expr);
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};
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}
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macro_rules! wrapping_assignment {
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($result:expr, $lhs:ident $op:tt $rhs:expr) => {
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let mut lhs1 = $lhs;
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lhs1 $op $rhs;
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assert_eq!($result, lhs1);
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let mut lhs2 = $lhs;
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lhs2 $op &$rhs;
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assert_eq!($result, lhs2);
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};
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}
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macro_rules! wrapping_test {
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($type:ty, $min:expr, $max:expr) => {
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#[test]
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fn wrapping_$type() {
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let zero: Wrapping<$type> = Wrapping(0);
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let one: Wrapping<$type> = Wrapping(1);
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let min: Wrapping<$type> = Wrapping($min);
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let max: Wrapping<$type> = Wrapping($max);
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wrapping_operation!(min, max + one);
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wrapping_assignment!(min, max += one);
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wrapping_operation!(max, min - one);
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wrapping_assignment!(max, min -= one);
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wrapping_operation!(max, max * one);
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wrapping_assignment!(max, max *= one);
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wrapping_operation!(max, max / one);
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wrapping_assignment!(max, max /= one);
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wrapping_operation!(zero, max % one);
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wrapping_assignment!(zero, max %= one);
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wrapping_operation!(zero, zero & max);
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wrapping_assignment!(zero, zero &= max);
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wrapping_operation!(max, zero | max);
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wrapping_assignment!(max, zero |= max);
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wrapping_operation!(zero, max ^ max);
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wrapping_assignment!(zero, max ^= max);
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wrapping_operation!(zero, zero << 1usize);
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wrapping_assignment!(zero, zero <<= 1usize);
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wrapping_operation!(zero, zero >> 1usize);
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wrapping_assignment!(zero, zero >>= 1usize);
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wrapping_operation!(zero, -zero);
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wrapping_operation!(max, !min);
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}
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};
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}
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wrapping_test!(i8, i8::MIN, i8::MAX);
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wrapping_test!(i16, i16::MIN, i16::MAX);
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wrapping_test!(i32, i32::MIN, i32::MAX);
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wrapping_test!(i64, i64::MIN, i64::MAX);
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#[cfg(not(target_os = "emscripten"))]
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wrapping_test!(i128, i128::MIN, i128::MAX);
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wrapping_test!(isize, isize::MIN, isize::MAX);
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wrapping_test!(u8, u8::MIN, u8::MAX);
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wrapping_test!(u16, u16::MIN, u16::MAX);
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wrapping_test!(u32, u32::MIN, u32::MAX);
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wrapping_test!(u64, u64::MIN, u64::MAX);
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#[cfg(not(target_os = "emscripten"))]
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wrapping_test!(u128, u128::MIN, u128::MAX);
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wrapping_test!(usize, usize::MIN, usize::MAX);
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