Make drain take a mutable borrow instead of Box<Self> for reflected Map, List, and Set.
#15406
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…ed `Map`, `List`, and `Set`. Some notable exceptions to this change are `Array` and `Tuple`. These types don't make sense with `drain` taking a mutable borrow since they can't get "smaller".
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…ed `Map`, `List`, and `Set`. (bevyengine#15406) # Objective Fixes bevyengine#15185. # Solution Change `drain` to take a `&mut self` for most reflected types. Some notable exceptions to this change are `Array` and `Tuple`. These types don't make sense with `drain` taking a mutable borrow since they can't get "smaller". Also `BTreeMap` doesn't have a `drain` function, so we have to pop elements off one at a time. ## Testing - The existing tests are sufficient. --- ## Migration Guide - `reflect::Map`, `reflect::List`, and `reflect::Set` all now take a `&mut self` instead of a `Box<Self>`. Callers of these traits should add `&mut` before their boxes, and implementers of these traits should update to match.
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Objective
Fixes #15185.
Solution
Change
drainto take a&mut selffor most reflected types.Some notable exceptions to this change are
ArrayandTuple. These types don't make sense withdraintaking a mutable borrow since they can't get "smaller". AlsoBTreeMapdoesn't have adrainfunction, so we have to pop elements off one at a time.Testing
Migration Guide
reflect::Map,reflect::List, andreflect::Setall now take a&mut selfinstead of aBox<Self>. Callers of these traits should add&mutbefore their boxes, and implementers of these traits should update to match.