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<?php |
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declare(strict_types=1); |
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namespace Scalp; |
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use function Scalp\Reflection\reflectionFunction; |
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final class PartialApplication |
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{ |
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private $f; |
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private $arguments; |
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public function __construct(callable $f, array $arguments) |
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{ |
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$this->guardAgainstMissingArguments($f, $arguments); |
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$this->f = $f; |
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$this->arguments = $arguments; |
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} |
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public function __invoke() |
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{ |
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$appliedArguments = $this->applyArguments(func_get_args()); |
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$this->guardAgainstMissingAppliedArguments($appliedArguments); |
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return ($this->f)(...$appliedArguments); |
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} |
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private function applyArguments(array $arguments): array |
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{ |
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$argsIterator = new \ArrayIterator($arguments); |
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$replacePlaceholders = function ($arg) use ($argsIterator) { |
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$replacement = $arg === __ && $argsIterator->valid() |
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? $argsIterator->current() |
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: $arg; |
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if ($replacement !== $arg) { |
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$argsIterator->next(); |
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} |
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return $replacement; |
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}; |
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return array_map($replacePlaceholders, $this->arguments); |
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} |
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private function guardAgainstMissingArguments(callable $f, array $arguments): void |
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{ |
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$required = $this->countRequiredArguments($f); |
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if (\count($arguments) < $required) { |
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throw new \BadFunctionCallException('Number of passed arguments is less than required arguments. Use `__` const to add placeholder or value to apply.'); |
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} |
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} |
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private function guardAgainstMissingAppliedArguments(array $appliedArguments): void |
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{ |
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$placeholders = $this->placeholderArguments($appliedArguments); |
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if ($placeholders !== []) { |
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throw new \BadFunctionCallException(sprintf( |
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'Partially applied function has %d missing argument%s at position: %s.', |
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\count($placeholders), |
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\count($placeholders) > 1 ? 's' : '', |
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implode(', ', array_map(function (int $idx): int { |
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return $idx + 1; |
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}, array_keys($placeholders))) |
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)); |
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} |
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} |
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private function countRequiredArguments(callable $f): int |
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{ |
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$rf = reflectionFunction($f); |
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[$count, $required] = array_reduce($rf->getParameters(), function (array $carry, \ReflectionParameter $parameter): array { |
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$count = $carry[0] + 1; |
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$required = $parameter->isOptional() ? $carry[1] : $count; |
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return [$count, $required]; |
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}, [0, 0]); |
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return $required; |
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} |
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private function placeholderArguments(array $arguments): array |
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{ |
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return array_filter($arguments, function ($arg): bool { return $arg === __; }); |
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} |
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} |
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pawaclawczyk /
scalp
The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g.
excluded_paths: ["lib/*"], you can move it to the dependency path list as follows:For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths