Trait rug::ops::DivRounding [−][src]
pub trait DivRounding<Rhs = Self> { type Output; fn div_trunc(self, rhs: Rhs) -> Self::Output; fn div_ceil(self, rhs: Rhs) -> Self::Output; fn div_floor(self, rhs: Rhs) -> Self::Output; fn div_euc(self, rhs: Rhs) -> Self::Output; }
Expand description
Rounding variants of division.
Examples
use rug::ops::DivRounding; struct I(i32); impl DivRounding<i32> for I { type Output = i32; fn div_trunc(self, rhs: i32) -> i32 { self.0 / rhs } fn div_ceil(self, rhs: i32) -> i32 { let (q, r) = (self.0 / rhs, self.0 % rhs); let change = if rhs > 0 { r > 0 } else { r < 0 }; if change { q + 1 } else { q } } fn div_floor(self, rhs: i32) -> i32 { let (q, r) = (self.0 / rhs, self.0 % rhs); let change = if rhs > 0 { r < 0 } else { r > 0 }; if change { q - 1 } else { q } } fn div_euc(self, rhs: i32) -> i32 { let (q, r) = (self.0 / rhs, self.0 % rhs); if r < 0 { if rhs < 0 { q + 1 } else { q - 1 } } else { q } } } assert_eq!(I(-10).div_trunc(-3), 3); assert_eq!(I(-10).div_ceil(-3), 4); assert_eq!(I(-10).div_floor(-3), 3); assert_eq!(I(-10).div_euc(-3), 4);
Associated Types
Required methods
Performs division, rounding the quotient towards zero.