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harudagondi 6e50b249a4 Update ExactSizeIterator impl to support archetypal filters (With, Without) (#5124) 
# 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.
2022-06-29 02:15:28 +00:00
..
src Assert compiler errors for compile_fail tests (#3067) 2021-11-13 22:43:19 +00:00
tests Update ExactSizeIterator impl to support archetypal filters (With, Without) (#5124) 2022-06-29 02:15:28 +00:00
Cargo.toml Fix release workflow (#4903) 2022-06-06 15:47:51 +00:00
README.md Assert compiler errors for compile_fail tests (#3067) 2021-11-13 22:43:19 +00:00

README.md

Compile fail tests for bevy_ecs

This crate is separate from bevy_ecs and not part of the Bevy workspace in order to not fail crater tests for Bevy. The tests assert on the exact compiler errors and can easily fail for new Rust versions due to updated compiler errors (e.g. changes in spans).

The CI workflow executes these tests on the stable rust toolchain (see tools/ci).