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35 lines
619 B
35 lines
619 B
--TEST--
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Symfony Console pattern: closure caches iterable values with coalesce assignment
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--FILE--
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<?php
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function valueCallback(iterable $values): Closure
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{
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$valueCache = null;
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return static function () use (&$valueCache, $values): array {
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return $valueCache ??= iterator_to_array($values, false);
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};
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}
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function main(): void
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{
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$callback = valueCallback(new ArrayIterator(['a' => 'A', 'b' => 'B']));
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var_dump($callback());
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var_dump($callback());
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}
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?>
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--EXPECT--
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array(2) {
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[0]=>
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string(1) "A"
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[1]=>
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string(1) "B"
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}
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array(2) {
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[0]=>
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string(1) "A"
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[1]=>
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string(1) "B"
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}
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