d3e020a1e7
I'm opening this prematurely; consider this an RFC that predates RFCs and therefore not super-RFC-like. This PR does two "big" things: decouple run criteria from system sets, reimagine system sets as weapons of mass system description. ### What it lets us do: * Reuse run criteria within a stage. * Pipe output of one run criteria as input to another. * Assign labels, dependencies, run criteria, and ambiguity sets to many systems at the same time. ### Things already done: * Decoupled run criteria from system sets. * Mass system description superpowers to `SystemSet`. * Implemented `RunCriteriaDescriptor`. * Removed `VirtualSystemSet`. * Centralized all run criteria of `SystemStage`. * Extended system descriptors with per-system run criteria. * `.before()` and `.after()` for run criteria. * Explicit order between state driver and related run criteria. Fixes #1672. * Opt-in run criteria deduplication; default behavior is to panic. * Labels (not exposed) for state run criteria; state run criteria are deduplicated. ### API issues that need discussion: * [`FixedTimestep::step(1.0).label("my label")`]( |
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| .. | ||
| change_detection.rs | ||
| ecs_guide.rs | ||
| event.rs | ||
| fixed_timestep.rs | ||
| hierarchy.rs | ||
| parallel_query.rs | ||
| removal_detection.rs | ||
| startup_system.rs | ||
| state.rs | ||
| system_chaining.rs | ||
| system_param.rs | ||
| timers.rs | ||