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psalm/docs/running_psalm/issues/MissingTemplateParam.md
2020-03-20 19:13:56 -04:00

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# MissingTemplateParam
Emitted when using the `@extends`/`@implements` annotation to extend a class without
extending all its template params.
```php
<?php
/**
* @template-implements ArrayAccess<int>
*/
class SomeIterator implements ArrayAccess
{
public function offsetSet($offset, $value) {
}
public function offsetExists($offset) {
return false;
}
public function offsetUnset($offset) {
}
public function offsetGet($offset) {
return null;
}
}
```