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<?php |
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declare(strict_types=1); |
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namespace Marcosh\PhpValidationDSL; |
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use Closure; |
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use ReflectionFunction; |
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/** |
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* implementation heavily inspired by https://github.com/m4rw3r/autoCurry |
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* |
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* @param callable $f with signature ($a1, $a2, ...) -> $something |
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* @return Closure with signature $a1 -> ($a2 -> (... -> $something)) |
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* |
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* @psalm-return Closure(): callable |
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*/ |
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function curry(callable $f): Closure |
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{ |
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$innerCurry = |
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/** |
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* @return Closure |
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* |
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* @psalm-return Closure(): callable |
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*/ |
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static function ( |
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callable $f, |
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?int $numberOfParameters = null, |
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array $parameters = [] |
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) use (&$innerCurry): Closure { |
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if (null === $numberOfParameters) { |
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// retrieve number of parameters from reflection |
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$fClosure = Closure::fromCallable($f); |
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$fRef = new ReflectionFunction($fClosure); |
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$numberOfParameters = $fRef->getNumberOfParameters(); |
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} |
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/** @psalm-suppress MissingClosureReturnType */ |
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return static function () use ($f, $numberOfParameters, $parameters, $innerCurry) { |
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/** @var array<int, mixed> $newParameters */ |
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$newParameters = array_merge($parameters, func_get_args()); |
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if (count($newParameters) >= $numberOfParameters) { |
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return call_user_func_array($f, $newParameters); |
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} |
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return $innerCurry($f, $numberOfParameters, $newParameters); |
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}; |
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}; |
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return $innerCurry($f); |
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} |
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/** |
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* @param callable $f with signature $a1 -> ($a2 -> (... -> $something)) |
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* @return Closure with signature ($a1, $a2, ...) -> $something |
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* |
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* @psalm-return Closure(... array<int, mixed>): mixed |
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*/ |
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function uncurry(callable $f): Closure |
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{ |
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/** @psalm-suppress MissingClosureReturnType */ |
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return static function (...$params) use ($f) { |
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if ([] === $params) { |
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return $f(); |
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} |
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$firstParam = $params[0]; |
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$firstApplication = $f($firstParam); |
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if (! is_callable($firstApplication)) { |
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return $firstApplication; |
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} |
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return uncurry($firstApplication)(...array_slice($params, 1)); |
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}; |
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} |
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marcosh /
php-validation-dsl
