diff options
Diffstat (limited to 'vendor/num-traits/src/ops/wrapping.rs')
| -rw-r--r-- | vendor/num-traits/src/ops/wrapping.rs | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/vendor/num-traits/src/ops/wrapping.rs b/vendor/num-traits/src/ops/wrapping.rs deleted file mode 100644 index 3a8b331..0000000 --- a/vendor/num-traits/src/ops/wrapping.rs +++ /dev/null @@ -1,327 +0,0 @@ -use core::num::Wrapping; -use core::ops::{Add, Mul, Neg, Shl, Shr, Sub}; - -macro_rules! wrapping_impl { - ($trait_name:ident, $method:ident, $t:ty) => { - impl $trait_name for $t { - #[inline] - fn $method(&self, v: &Self) -> Self { - <$t>::$method(*self, *v) - } - } - }; - ($trait_name:ident, $method:ident, $t:ty, $rhs:ty) => { - impl $trait_name<$rhs> for $t { - #[inline] - fn $method(&self, v: &$rhs) -> Self { - <$t>::$method(*self, *v) - } - } - }; -} - -/// Performs addition that wraps around on overflow. -pub trait WrappingAdd: Sized + Add<Self, Output = Self> { - /// Wrapping (modular) addition. Computes `self + other`, wrapping around at the boundary of - /// the type. - fn wrapping_add(&self, v: &Self) -> Self; -} - -wrapping_impl!(WrappingAdd, wrapping_add, u8); -wrapping_impl!(WrappingAdd, wrapping_add, u16); -wrapping_impl!(WrappingAdd, wrapping_add, u32); -wrapping_impl!(WrappingAdd, wrapping_add, u64); -wrapping_impl!(WrappingAdd, wrapping_add, usize); -wrapping_impl!(WrappingAdd, wrapping_add, u128); - -wrapping_impl!(WrappingAdd, wrapping_add, i8); -wrapping_impl!(WrappingAdd, wrapping_add, i16); -wrapping_impl!(WrappingAdd, wrapping_add, i32); -wrapping_impl!(WrappingAdd, wrapping_add, i64); -wrapping_impl!(WrappingAdd, wrapping_add, isize); -wrapping_impl!(WrappingAdd, wrapping_add, i128); - -/// Performs subtraction that wraps around on overflow. -pub trait WrappingSub: Sized + Sub<Self, Output = Self> { - /// Wrapping (modular) subtraction. Computes `self - other`, wrapping around at the boundary - /// of the type. - fn wrapping_sub(&self, v: &Self) -> Self; -} - -wrapping_impl!(WrappingSub, wrapping_sub, u8); -wrapping_impl!(WrappingSub, wrapping_sub, u16); -wrapping_impl!(WrappingSub, wrapping_sub, u32); -wrapping_impl!(WrappingSub, wrapping_sub, u64); -wrapping_impl!(WrappingSub, wrapping_sub, usize); -wrapping_impl!(WrappingSub, wrapping_sub, u128); - -wrapping_impl!(WrappingSub, wrapping_sub, i8); -wrapping_impl!(WrappingSub, wrapping_sub, i16); -wrapping_impl!(WrappingSub, wrapping_sub, i32); -wrapping_impl!(WrappingSub, wrapping_sub, i64); -wrapping_impl!(WrappingSub, wrapping_sub, isize); -wrapping_impl!(WrappingSub, wrapping_sub, i128); - -/// Performs multiplication that wraps around on overflow. -pub trait WrappingMul: Sized + Mul<Self, Output = Self> { - /// Wrapping (modular) multiplication. Computes `self * other`, wrapping around at the boundary - /// of the type. - fn wrapping_mul(&self, v: &Self) -> Self; -} - -wrapping_impl!(WrappingMul, wrapping_mul, u8); -wrapping_impl!(WrappingMul, wrapping_mul, u16); -wrapping_impl!(WrappingMul, wrapping_mul, u32); -wrapping_impl!(WrappingMul, wrapping_mul, u64); -wrapping_impl!(WrappingMul, wrapping_mul, usize); -wrapping_impl!(WrappingMul, wrapping_mul, u128); - -wrapping_impl!(WrappingMul, wrapping_mul, i8); -wrapping_impl!(WrappingMul, wrapping_mul, i16); -wrapping_impl!(WrappingMul, wrapping_mul, i32); -wrapping_impl!(WrappingMul, wrapping_mul, i64); -wrapping_impl!(WrappingMul, wrapping_mul, isize); -wrapping_impl!(WrappingMul, wrapping_mul, i128); - -macro_rules! wrapping_unary_impl { - ($trait_name:ident, $method:ident, $t:ty) => { - impl $trait_name for $t { - #[inline] - fn $method(&self) -> $t { - <$t>::$method(*self) - } - } - }; -} - -/// Performs a negation that does not panic. -pub trait WrappingNeg: Sized { - /// Wrapping (modular) negation. Computes `-self`, - /// wrapping around at the boundary of the type. - /// - /// Since unsigned types do not have negative equivalents - /// all applications of this function will wrap (except for `-0`). - /// For values smaller than the corresponding signed type's maximum - /// the result is the same as casting the corresponding signed value. - /// Any larger values are equivalent to `MAX + 1 - (val - MAX - 1)` where - /// `MAX` is the corresponding signed type's maximum. - /// - /// ``` - /// use num_traits::WrappingNeg; - /// - /// assert_eq!(100i8.wrapping_neg(), -100); - /// assert_eq!((-100i8).wrapping_neg(), 100); - /// assert_eq!((-128i8).wrapping_neg(), -128); // wrapped! - /// ``` - fn wrapping_neg(&self) -> Self; -} - -wrapping_unary_impl!(WrappingNeg, wrapping_neg, u8); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, u16); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, u32); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, u64); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, usize); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, u128); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, i8); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, i16); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, i32); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, i64); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, isize); -wrapping_unary_impl!(WrappingNeg, wrapping_neg, i128); - -macro_rules! wrapping_shift_impl { - ($trait_name:ident, $method:ident, $t:ty) => { - impl $trait_name for $t { - #[inline] - fn $method(&self, rhs: u32) -> $t { - <$t>::$method(*self, rhs) - } - } - }; -} - -/// Performs a left shift that does not panic. -pub trait WrappingShl: Sized + Shl<usize, Output = Self> { - /// Panic-free bitwise shift-left; yields `self << mask(rhs)`, - /// where `mask` removes any high order bits of `rhs` that would - /// cause the shift to exceed the bitwidth of the type. - /// - /// ``` - /// use num_traits::WrappingShl; - /// - /// let x: u16 = 0x0001; - /// - /// assert_eq!(WrappingShl::wrapping_shl(&x, 0), 0x0001); - /// assert_eq!(WrappingShl::wrapping_shl(&x, 1), 0x0002); - /// assert_eq!(WrappingShl::wrapping_shl(&x, 15), 0x8000); - /// assert_eq!(WrappingShl::wrapping_shl(&x, 16), 0x0001); - /// ``` - fn wrapping_shl(&self, rhs: u32) -> Self; -} - -wrapping_shift_impl!(WrappingShl, wrapping_shl, u8); -wrapping_shift_impl!(WrappingShl, wrapping_shl, u16); -wrapping_shift_impl!(WrappingShl, wrapping_shl, u32); -wrapping_shift_impl!(WrappingShl, wrapping_shl, u64); -wrapping_shift_impl!(WrappingShl, wrapping_shl, usize); -wrapping_shift_impl!(WrappingShl, wrapping_shl, u128); - -wrapping_shift_impl!(WrappingShl, wrapping_shl, i8); -wrapping_shift_impl!(WrappingShl, wrapping_shl, i16); -wrapping_shift_impl!(WrappingShl, wrapping_shl, i32); -wrapping_shift_impl!(WrappingShl, wrapping_shl, i64); -wrapping_shift_impl!(WrappingShl, wrapping_shl, isize); -wrapping_shift_impl!(WrappingShl, wrapping_shl, i128); - -/// Performs a right shift that does not panic. -pub trait WrappingShr: Sized + Shr<usize, Output = Self> { - /// Panic-free bitwise shift-right; yields `self >> mask(rhs)`, - /// where `mask` removes any high order bits of `rhs` that would - /// cause the shift to exceed the bitwidth of the type. - /// - /// ``` - /// use num_traits::WrappingShr; - /// - /// let x: u16 = 0x8000; - /// - /// assert_eq!(WrappingShr::wrapping_shr(&x, 0), 0x8000); - /// assert_eq!(WrappingShr::wrapping_shr(&x, 1), 0x4000); - /// assert_eq!(WrappingShr::wrapping_shr(&x, 15), 0x0001); - /// assert_eq!(WrappingShr::wrapping_shr(&x, 16), 0x8000); - /// ``` - fn wrapping_shr(&self, rhs: u32) -> Self; -} - -wrapping_shift_impl!(WrappingShr, wrapping_shr, u8); -wrapping_shift_impl!(WrappingShr, wrapping_shr, u16); -wrapping_shift_impl!(WrappingShr, wrapping_shr, u32); -wrapping_shift_impl!(WrappingShr, wrapping_shr, u64); -wrapping_shift_impl!(WrappingShr, wrapping_shr, usize); -wrapping_shift_impl!(WrappingShr, wrapping_shr, u128); - -wrapping_shift_impl!(WrappingShr, wrapping_shr, i8); -wrapping_shift_impl!(WrappingShr, wrapping_shr, i16); -wrapping_shift_impl!(WrappingShr, wrapping_shr, i32); -wrapping_shift_impl!(WrappingShr, wrapping_shr, i64); -wrapping_shift_impl!(WrappingShr, wrapping_shr, isize); -wrapping_shift_impl!(WrappingShr, wrapping_shr, i128); - -// Well this is a bit funny, but all the more appropriate. -impl<T: WrappingAdd> WrappingAdd for Wrapping<T> -where - Wrapping<T>: Add<Output = Wrapping<T>>, -{ - fn wrapping_add(&self, v: &Self) -> Self { - Wrapping(self.0.wrapping_add(&v.0)) - } -} -impl<T: WrappingSub> WrappingSub for Wrapping<T> -where - Wrapping<T>: Sub<Output = Wrapping<T>>, -{ - fn wrapping_sub(&self, v: &Self) -> Self { - Wrapping(self.0.wrapping_sub(&v.0)) - } -} -impl<T: WrappingMul> WrappingMul for Wrapping<T> -where - Wrapping<T>: Mul<Output = Wrapping<T>>, -{ - fn wrapping_mul(&self, v: &Self) -> Self { - Wrapping(self.0.wrapping_mul(&v.0)) - } -} -impl<T: WrappingNeg> WrappingNeg for Wrapping<T> -where - Wrapping<T>: Neg<Output = Wrapping<T>>, -{ - fn wrapping_neg(&self) -> Self { - Wrapping(self.0.wrapping_neg()) - } -} -impl<T: WrappingShl> WrappingShl for Wrapping<T> -where - Wrapping<T>: Shl<usize, Output = Wrapping<T>>, -{ - fn wrapping_shl(&self, rhs: u32) -> Self { - Wrapping(self.0.wrapping_shl(rhs)) - } -} -impl<T: WrappingShr> WrappingShr for Wrapping<T> -where - Wrapping<T>: Shr<usize, Output = Wrapping<T>>, -{ - fn wrapping_shr(&self, rhs: u32) -> Self { - Wrapping(self.0.wrapping_shr(rhs)) - } -} - -#[test] -fn test_wrapping_traits() { - fn wrapping_add<T: WrappingAdd>(a: T, b: T) -> T { - a.wrapping_add(&b) - } - fn wrapping_sub<T: WrappingSub>(a: T, b: T) -> T { - a.wrapping_sub(&b) - } - fn wrapping_mul<T: WrappingMul>(a: T, b: T) -> T { - a.wrapping_mul(&b) - } - fn wrapping_neg<T: WrappingNeg>(a: T) -> T { - a.wrapping_neg() - } - fn wrapping_shl<T: WrappingShl>(a: T, b: u32) -> T { - a.wrapping_shl(b) - } - fn wrapping_shr<T: WrappingShr>(a: T, b: u32) -> T { - a.wrapping_shr(b) - } - assert_eq!(wrapping_add(255, 1), 0u8); - assert_eq!(wrapping_sub(0, 1), 255u8); - assert_eq!(wrapping_mul(255, 2), 254u8); - assert_eq!(wrapping_neg(255), 1u8); - assert_eq!(wrapping_shl(255, 8), 255u8); - assert_eq!(wrapping_shr(255, 8), 255u8); - assert_eq!(wrapping_add(255, 1), (Wrapping(255u8) + Wrapping(1u8)).0); - assert_eq!(wrapping_sub(0, 1), (Wrapping(0u8) - Wrapping(1u8)).0); - assert_eq!(wrapping_mul(255, 2), (Wrapping(255u8) * Wrapping(2u8)).0); - assert_eq!(wrapping_neg(255), (-Wrapping(255u8)).0); - assert_eq!(wrapping_shl(255, 8), (Wrapping(255u8) << 8).0); - assert_eq!(wrapping_shr(255, 8), (Wrapping(255u8) >> 8).0); -} - -#[test] -fn wrapping_is_wrappingadd() { - fn require_wrappingadd<T: WrappingAdd>(_: &T) {} - require_wrappingadd(&Wrapping(42)); -} - -#[test] -fn wrapping_is_wrappingsub() { - fn require_wrappingsub<T: WrappingSub>(_: &T) {} - require_wrappingsub(&Wrapping(42)); -} - -#[test] -fn wrapping_is_wrappingmul() { - fn require_wrappingmul<T: WrappingMul>(_: &T) {} - require_wrappingmul(&Wrapping(42)); -} - -#[test] -fn wrapping_is_wrappingneg() { - fn require_wrappingneg<T: WrappingNeg>(_: &T) {} - require_wrappingneg(&Wrapping(42)); -} - -#[test] -fn wrapping_is_wrappingshl() { - fn require_wrappingshl<T: WrappingShl>(_: &T) {} - require_wrappingshl(&Wrapping(42)); -} - -#[test] -fn wrapping_is_wrappingshr() { - fn require_wrappingshr<T: WrappingShr>(_: &T) {} - require_wrappingshr(&Wrapping(42)); -} |