mirror of
https://github.com/fish-shell/fish-shell
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4d4ef7fa40
This removes IsOkAnd and the is_some_and method. I cannot actually find is_none_or in the stdlib? I've kept the trait name to avoid changing it now and then later, maybe this should be moved elsewhere to avoid claiming it's an stdlib thing?
35 lines
967 B
Rust
35 lines
967 B
Rust
//! stdlib backports
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pub trait IsSomeAnd {
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type Type;
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#[allow(clippy::wrong_self_convention)]
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fn is_none_or(self, s: impl FnOnce(Self::Type) -> bool) -> bool;
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}
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impl<T> IsSomeAnd for Option<T> {
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type Type = T;
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fn is_none_or(self, f: impl FnOnce(T) -> bool) -> bool {
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match self {
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Some(v) => f(v),
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None => true,
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}
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}
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}
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pub trait IsSorted {
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type T;
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fn is_sorted_by(&self, pred: impl Fn(&Self::T, &Self::T) -> Option<std::cmp::Ordering>)
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-> bool;
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}
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impl<T> IsSorted for &[T] {
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type T = T;
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fn is_sorted_by(&self, pred: impl Fn(&T, &T) -> Option<std::cmp::Ordering>) -> bool {
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self.windows(2)
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.all(|w| pred(&w[0], &w[1]).is_none_or(|order| order.is_le()))
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}
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}
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impl<T> IsSorted for Vec<T> {
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type T = T;
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fn is_sorted_by(&self, pred: impl Fn(&T, &T) -> Option<std::cmp::Ordering>) -> bool {
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IsSorted::is_sorted_by(&self.as_slice(), pred)
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}
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}
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