56f26cfb02
# Objective - A preparation for the 'system as entities' - The current system has a series of states such as `is_send`, `is_exclusive`, `has_defered`, As `system as entites` landed, it may have more states. Using Bitflags to unify all states is a more concise and performant approach ## Solution - Using Bitflags to unify system state.
44 lines
673 B
Markdown
44 lines
673 B
Markdown
---
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title: Unified system state flag
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pull_requests: [19506]
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---
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Now the system have a unified `SystemStateFlags` to represent its different states.
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If your code previously looked like this:
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```rust
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impl System for MyCustomSystem {
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// ...
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fn is_send(&self) -> bool {
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false
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}
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fn is_exclusive(&self) -> bool {
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true
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}
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fn has_deferred(&self) -> bool {
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false
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}
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// ....
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}
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```
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You should migrate it to:
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```rust
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impl System for MyCustomSystem{
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// ...
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fn flags(&self) -> SystemStateFlags {
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// non-send , exclusive , no deferred
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SystemStateFlags::NON_SEND | SystemStateFlags::EXCLUSIVE
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}
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// ...
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}
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```
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