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Diffstat (limited to 'vendor/writeable/src/ops.rs')
| -rw-r--r-- | vendor/writeable/src/ops.rs | 294 |
1 files changed, 0 insertions, 294 deletions
diff --git a/vendor/writeable/src/ops.rs b/vendor/writeable/src/ops.rs deleted file mode 100644 index a4c1ffd7..00000000 --- a/vendor/writeable/src/ops.rs +++ /dev/null @@ -1,294 +0,0 @@ -// This file is part of ICU4X. For terms of use, please see the file -// called LICENSE at the top level of the ICU4X source tree -// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ). - -use crate::LengthHint; - -impl core::ops::Add<LengthHint> for LengthHint { - type Output = Self; - - fn add(self, other: LengthHint) -> Self { - LengthHint( - self.0.saturating_add(other.0), - match (self.1, other.1) { - (Some(c), Some(d)) => c.checked_add(d), - _ => None, - }, - ) - } -} - -impl core::ops::AddAssign<LengthHint> for LengthHint { - fn add_assign(&mut self, other: Self) { - *self = *self + other; - } -} - -impl core::iter::Sum<LengthHint> for LengthHint { - fn sum<I>(iter: I) -> Self - where - I: Iterator<Item = LengthHint>, - { - iter.fold(LengthHint::exact(0), core::ops::Add::add) - } -} - -impl core::ops::Add<usize> for LengthHint { - type Output = Self; - - fn add(self, other: usize) -> Self { - Self( - self.0.saturating_add(other), - self.1.and_then(|upper| upper.checked_add(other)), - ) - } -} - -impl core::ops::AddAssign<usize> for LengthHint { - fn add_assign(&mut self, other: usize) { - *self = *self + other; - } -} - -impl core::ops::Mul<usize> for LengthHint { - type Output = Self; - - fn mul(self, other: usize) -> Self { - Self( - self.0.saturating_mul(other), - self.1.and_then(|upper| upper.checked_mul(other)), - ) - } -} - -impl core::ops::MulAssign<usize> for LengthHint { - fn mul_assign(&mut self, other: usize) { - *self = *self * other; - } -} - -impl core::ops::BitOr<LengthHint> for LengthHint { - type Output = Self; - - /// Returns a new hint that is correct wherever `self` is correct, and wherever - /// `other` is correct. - /// - /// Example: - /// ``` - /// # use writeable::{LengthHint, Writeable}; - /// # use core::fmt; - /// # fn coin_flip() -> bool { true } - /// - /// struct NonDeterministicWriteable(String, String); - /// - /// impl Writeable for NonDeterministicWriteable { - /// fn write_to<W: fmt::Write + ?Sized>( - /// &self, - /// sink: &mut W, - /// ) -> fmt::Result { - /// sink.write_str(if coin_flip() { &self.0 } else { &self.1 }) - /// } - /// - /// fn writeable_length_hint(&self) -> LengthHint { - /// LengthHint::exact(self.0.len()) | LengthHint::exact(self.1.len()) - /// } - /// } - /// - /// writeable::impl_display_with_writeable!(NonDeterministicWriteable); - /// ``` - fn bitor(self, other: LengthHint) -> Self { - LengthHint( - Ord::min(self.0, other.0), - match (self.1, other.1) { - (Some(c), Some(d)) => Some(Ord::max(c, d)), - _ => None, - }, - ) - } -} - -impl core::ops::BitOrAssign<LengthHint> for LengthHint { - fn bitor_assign(&mut self, other: Self) { - *self = *self | other; - } -} - -impl core::iter::Sum<usize> for LengthHint { - fn sum<I>(iter: I) -> Self - where - I: Iterator<Item = usize>, - { - LengthHint::exact(iter.sum::<usize>()) - } -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn test_add() { - assert_eq!(LengthHint::exact(3) + 2, LengthHint::exact(5)); - assert_eq!( - LengthHint::exact(3) + LengthHint::exact(2), - LengthHint::exact(5) - ); - assert_eq!( - LengthHint::exact(3) + LengthHint::undefined(), - LengthHint::at_least(3) - ); - - assert_eq!(LengthHint::undefined() + 2, LengthHint::at_least(2)); - assert_eq!( - LengthHint::undefined() + LengthHint::exact(2), - LengthHint::at_least(2) - ); - assert_eq!( - LengthHint::undefined() + LengthHint::undefined(), - LengthHint::undefined() - ); - - assert_eq!( - LengthHint::at_least(15) + LengthHint::exact(3), - LengthHint::at_least(18) - ); - - assert_eq!( - LengthHint::at_least(15) + LengthHint::at_most(3), - LengthHint::at_least(15) - ); - - assert_eq!(LengthHint::between(48, 92) + 5, LengthHint::between(53, 97)); - - let mut len = LengthHint::exact(5); - len += LengthHint::exact(3); - assert_eq!(len, LengthHint::exact(8)); - len += 2; - assert_eq!(len, LengthHint::exact(10)); - len += LengthHint::undefined(); - assert_eq!(len, LengthHint::at_least(10)); - - len += LengthHint::exact(3); - assert_eq!(len, LengthHint::at_least(13)); - len += 2; - assert_eq!(len, LengthHint::at_least(15)); - len += LengthHint::undefined(); - assert_eq!(len, LengthHint::at_least(15)); - - assert_eq!( - LengthHint::between(usize::MAX - 10, usize::MAX - 5) + LengthHint::exact(20), - LengthHint::at_least(usize::MAX) - ); - } - - #[test] - fn test_sum() { - let lens = [ - LengthHint::exact(4), - LengthHint::exact(1), - LengthHint::exact(1), - ]; - assert_eq!( - lens.iter().copied().sum::<LengthHint>(), - LengthHint::exact(6) - ); - - let lens = [ - LengthHint::exact(4), - LengthHint::undefined(), - LengthHint::at_least(1), - ]; - assert_eq!( - lens.iter().copied().sum::<LengthHint>(), - LengthHint::at_least(5) - ); - - let lens = [ - LengthHint::exact(4), - LengthHint::undefined(), - LengthHint::at_most(1), - ]; - assert_eq!( - lens.iter().copied().sum::<LengthHint>(), - LengthHint::at_least(4) - ); - - let lens = [4, 1, 1]; - assert_eq!( - lens.iter().copied().sum::<LengthHint>(), - LengthHint::exact(6) - ); - } - - #[test] - fn test_mul() { - assert_eq!(LengthHint::exact(3) * 2, LengthHint::exact(6)); - - assert_eq!(LengthHint::undefined() * 2, LengthHint::undefined()); - - assert_eq!( - LengthHint::between(48, 92) * 2, - LengthHint::between(96, 184) - ); - - let mut len = LengthHint::exact(5); - len *= 2; - assert_eq!(len, LengthHint::exact(10)); - - assert_eq!( - LengthHint::between(usize::MAX - 10, usize::MAX - 5) * 2, - LengthHint::at_least(usize::MAX) - ); - } - - #[test] - fn test_bitor() { - assert_eq!( - LengthHint::exact(3) | LengthHint::exact(2), - LengthHint::between(2, 3) - ); - assert_eq!( - LengthHint::exact(3) | LengthHint::undefined(), - LengthHint::undefined() - ); - - assert_eq!( - LengthHint::undefined() | LengthHint::undefined(), - LengthHint::undefined() - ); - - assert_eq!( - LengthHint::exact(10) | LengthHint::exact(10), - LengthHint::exact(10) - ); - - assert_eq!( - LengthHint::at_least(15) | LengthHint::exact(3), - LengthHint::at_least(3) - ); - - assert_eq!( - LengthHint::at_least(15) | LengthHint::at_most(18), - LengthHint::undefined() - ); - - assert_eq!( - LengthHint::at_least(15) | LengthHint::at_least(18), - LengthHint::at_least(15) - ); - - assert_eq!( - LengthHint::at_most(15) | LengthHint::at_most(18), - LengthHint::at_most(18) - ); - - assert_eq!( - LengthHint::between(5, 10) | LengthHint::at_most(3), - LengthHint::at_most(10) - ); - - let mut len = LengthHint::exact(5); - len |= LengthHint::exact(3); - assert_eq!(len, LengthHint::between(5, 3)); - } -} |