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[Merged by Bors] - Add IntoIterator impls for &Query and &mut Query #4692

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Objective

These types of IntoIterator impls are a common pattern in Rust, and these implementations make this common pattern work for bevy queries.

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Could you add a pair of tests to make sure the desired pattern continues to compile?


impl<'w, Q: WorldQuery, F: WorldQuery> IntoIterator for &'w mut Query<'_, '_, Q, F> {
type Item = QueryItem<'w, Q>;
type IntoIter = QueryIter<'w, 'w, Q, QueryFetch<'w, Q>, F>;
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why is this not QueryIter<'w, 's, ...

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I copied the bounds off of iter_mut, since iter_mut bound both 'w and 's to the borrow lifetime i did the same for this impl.

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alright i guess thats fine then

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Test LGTM and I think this functionality is good; only outstanding question is the lifetimes. I agree it's a bit suspicious.

@alice-i-cecile alice-i-cecile added A-ECS Entities, components, systems, and events C-Usability A simple quality-of-life change that makes Bevy easier to use labels May 7, 2022
@alice-i-cecile alice-i-cecile added the S-Ready-For-Final-Review This PR has been approved by the community. It's ready for a maintainer to consider merging it label May 7, 2022
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bors r+

bors bot pushed a commit that referenced this pull request May 9, 2022
# Objective

These types of IntoIterator impls are a common pattern in Rust, and these implementations make this common pattern work for bevy queries.
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bors bot commented May 9, 2022

Build failed (retrying...):

bors bot pushed a commit that referenced this pull request May 9, 2022
# Objective

These types of IntoIterator impls are a common pattern in Rust, and these implementations make this common pattern work for bevy queries.
@bors bors bot changed the title Add IntoIterator impls for &Query and &mut Query [Merged by Bors] - Add IntoIterator impls for &Query and &mut Query May 9, 2022
@bors bors bot closed this May 9, 2022
robtfm pushed a commit to robtfm/bevy that referenced this pull request May 10, 2022
# Objective

These types of IntoIterator impls are a common pattern in Rust, and these implementations make this common pattern work for bevy queries.
exjam pushed a commit to exjam/bevy that referenced this pull request May 22, 2022
# Objective

These types of IntoIterator impls are a common pattern in Rust, and these implementations make this common pattern work for bevy queries.
ItsDoot pushed a commit to ItsDoot/bevy that referenced this pull request Feb 1, 2023
# Objective

These types of IntoIterator impls are a common pattern in Rust, and these implementations make this common pattern work for bevy queries.
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A-ECS Entities, components, systems, and events C-Usability A simple quality-of-life change that makes Bevy easier to use S-Ready-For-Final-Review This PR has been approved by the community. It's ready for a maintainer to consider merging it
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6 participants