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Array equality for &dyn Array (#3880) #3899

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Mar 22, 2023
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Array equality for &dyn Array (#3880) #3899

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4 changes: 2 additions & 2 deletions arrow-array/src/array/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -425,13 +425,13 @@ pub trait ArrayAccessor: Array {
unsafe fn value_unchecked(&self, index: usize) -> Self::Item;
}

impl PartialEq for dyn Array {
impl PartialEq for dyn Array + '_ {
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@tustvold tustvold Mar 21, 2023 •
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This is the major "fix", previously this had an implicit 'static lifetime for dyn Array, which would then result in incredibly opaque compilation errors if you actually tried to use this

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I don't even understand what this means -- "any lifeime"?

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It's documented here - https://doc.rust-lang.org/reference/lifetime-elision.html#default-trait-object-lifetimes

I was aware it applied to things like Box<dyn Foo> but hadn't occurred to me that dyn Foo on its own also has an implicit 'static

fn eq(&self, other: &Self) -> bool {
self.data().eq(other.data())
}
}

impl<T: Array> PartialEq<T> for dyn Array {
impl<T: Array> PartialEq<T> for dyn Array + '_ {
fn eq(&self, other: &T) -> bool {
self.data().eq(other.data())
}
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