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Adds template annotations turning the `PromiseInterface` into a generic. Variables `$p1` and `$p2` in the following code example both are `PromiseInterface<int|string>`. ```php $f = function (): int|string { return time() % 2 ? 'string' : time(); }; /** * @return PromiseInterface<int|string> */ $fp = function (): PromiseInterface { return resolve(time() % 2 ? 'string' : time()); }; $p1 = resolve($f()); $p2 = $fp(); ``` When calling `then` on `$p1` or `$p2`, PHPStan understand that function `$f1` is type hinting its parameter fine, but `$f2` will throw during runtime: ```php $p2->then(static function (int|string $a) {}); $p2->then(static function (bool $a) {}); ``` Builds on top of #246 and #188 and is a requirement for reactphp/async#40
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,7 @@ | ||
parameters: | ||
ignoreErrors: | ||
- '#Template type T is declared as covariant, but occurs in contravariant position in parameter result of method React\\Promise\\Promise::settle\(\).#' | ||
- '#Template type T is declared as covariant, but occurs in contravariant position in parameter promise of method React\\Promise\\Promise::unwrap\(\).#' | ||
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includes: | ||
- phpstan.neon.dist |
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