remove formats
-use core::ops::{Add, Sub, Mul, Div, Shl, Shr};
+use core::ops::{Add, Sub, Mul, Div, Rem, Shl, Shr};
/// Performs addition that returns `None` instead of wrapping around on
/// overflow.
@@ -90,6 +90,51 @@ checked_impl!(CheckedDiv, checked_div, i32);
checked_impl!(CheckedDiv, checked_div, i64);
checked_impl!(CheckedDiv, checked_div, isize);
+// CheckedRem
+pub trait CheckedRem: Sized + Rem<Self, Output = Self> {
+ fn checked_rem(&self, v: &Self) -> Option<Self>;
+}
+
+checked_impl!(CheckedRem, checked_rem, u8);
+checked_impl!(CheckedRem, checked_rem, u16);
+checked_impl!(CheckedRem, checked_rem, u32);
+checked_impl!(CheckedRem, checked_rem, u64);
+checked_impl!(CheckedRem, checked_rem, usize);
+
+checked_impl!(CheckedRem, checked_rem, i8);
+checked_impl!(CheckedRem, checked_rem, i16);
+checked_impl!(CheckedRem, checked_rem, i32);
+checked_impl!(CheckedRem, checked_rem, i64);
+checked_impl!(CheckedRem, checked_rem, isize);
+
+// CheckedNeg
+macro_rules! checked_impl_one_para {
+ ($trait_name:ident, $method:ident, $t:ty) => {
+ impl $trait_name for $t {
+ #[inline]
+ fn $method(&self) -> Option<$t> {
+ <$t>::$method(*self)
+ }
+ }
+ }
+}
+
+pub trait CheckedNeg: Sized {
+ fn checked_neg(&self) -> Option<Self>;
+}
+
+checked_impl_one_para!(CheckedNeg, checked_neg, u8);
+checked_impl_one_para!(CheckedNeg, checked_neg, u16);
+checked_impl_one_para!(CheckedNeg, checked_neg, u32);
+checked_impl_one_para!(CheckedNeg, checked_neg, u64);
+checked_impl_one_para!(CheckedNeg, checked_neg, usize);
+
+checked_impl_one_para!(CheckedNeg, checked_neg, i8);
+checked_impl_one_para!(CheckedNeg, checked_neg, i16);
+checked_impl_one_para!(CheckedNeg, checked_neg, i32);
+checked_impl_one_para!(CheckedNeg, checked_neg, i64);
+checked_impl_one_para!(CheckedNeg, checked_neg, isize);
+
/// Performs a left shift that returns `None` on overflow.
pub trait CheckedShl: Sized + Shl<u32, Output=Self> {
/// Shifts a number to the left, checking for overflow. If overflow happens,
