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# Objective - Fixes #3142 ## Solution - Done according to #3142 - Created new marker trait `ArchetypeFilter` - Implement said trait to: - `With<T>` - `Without<T>` - tuples containing only types that implement `ArchetypeFilter`, from 0 to 15 elements - `Or<T>` where T is a tuple as described previously - Changed `ExactSizeIterator` impl to include a new generic that must implement `WorldQuery` and `ArchetypeFilter` - Added new tests --- ## Changelog ### Added - `Query`s with archetypal filters can now use `.iter().len()` to get the exact size of the iterator. |
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| .. | ||
| entity_ref_mut_lifetime_safety.rs | ||
| entity_ref_mut_lifetime_safety.stderr | ||
| query_exact_sized_iterator_safety.rs | ||
| query_exact_sized_iterator_safety.stderr | ||
| query_lifetime_safety.rs | ||
| query_lifetime_safety.stderr | ||
| system_param_derive_readonly.rs | ||
| system_param_derive_readonly.stderr | ||
| system_query_get_lifetime_safety.rs | ||
| system_query_get_lifetime_safety.stderr | ||
| system_query_get_many_lifetime_safety.rs | ||
| system_query_get_many_lifetime_safety.stderr | ||
| system_query_get_many_mut_lifetime_safety.rs | ||
| system_query_get_many_mut_lifetime_safety.stderr | ||
| system_query_iter_lifetime_safety.rs | ||
| system_query_iter_lifetime_safety.stderr | ||
| system_query_many_for_each_mut_lifetime_safety.rs | ||
| system_query_many_for_each_mut_lifetime_safety.stderr | ||
| system_query_set_get_lifetime_safety.rs | ||
| system_query_set_get_lifetime_safety.stderr | ||
| system_query_set_iter_lifetime_safety.rs | ||
| system_query_set_iter_lifetime_safety.stderr | ||
| system_state_get_lifetime_safety.rs | ||
| system_state_get_lifetime_safety.stderr | ||
| system_state_iter_lifetime_safety.rs | ||
| system_state_iter_lifetime_safety.stderr | ||
| system_state_iter_mut_overlap_safety.rs | ||
| system_state_iter_mut_overlap_safety.stderr | ||
| world_query_derive.rs | ||
| world_query_derive.stderr | ||