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- `Throwable` can only be implemented when classes extend one of `Exception` or `Error` - `UnitEnum` and `BackedEnum` cannot be implemented by user-defined classes Refs vimeo/psalm#7722
16 lines
277 B
Markdown
16 lines
277 B
Markdown
# InvalidInterfaceImplementation
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Emitted when trying to implement interface that cannot be implemented (e.g. `Throwable`, `UnitEnum`, `BackedEnum`).
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```php
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<?php
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class E implements UnitEnum
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{
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public static function cases(): array
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{
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return [];
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}
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}
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```
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