Scalp\CurriedFunction

Complexity

Total Complexity

6

Size/Duplication

Total Lines	38
Duplicated Lines	0 %

Importance

Changes

0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	__invoke()	0	9	2
A	liftN()	0	9	2
A	lift()	0	3	1

<?php

declare(strict_types=1);

namespace Scalp;

use function Scalp\Reflection\reflectionFunction;

The type Scalp\Reflection\reflectionFunction was not found. Maybe you did not declare it correctly or list all dependencies?

final class CurriedFunction
{
    private $f;
    private $arity;
    private $args;

    public static function lift(callable $f): CurriedFunction
    {
        return new self($f, reflectionFunction($f)->getNumberOfRequiredParameters(), []);
    }

    public static function liftN(callable $f, int $arity): CurriedFunction
    {
        $requiredArity = reflectionFunction($f)->getNumberOfRequiredParameters();

        if ($arity < $requiredArity) {
            throw new \ArgumentCountError(sprintf('Declared arity of function is %d, but required number of arguments is %d.', $arity, $requiredArity));

The type ArgumentCountError was not found. Maybe you did not declare it correctly or list all dependencies?

        }

        return new self($f, $arity, []);
    }

    public function __invoke(...$args)
    {
        $callArgs = array_merge($this->args, $args);

        if (\count($callArgs) >= $this->arity) {
            return ($this->f)(...$callArgs);
        }

        return new self($this->f, $this->arity, $callArgs);
    }

    private function __construct(callable $f, int $arity, array $args)
    {
        $this->f = $f;
        $this->arity = $arity;
        $this->args = $args;
    }
}