src/hold.php ➔ hold()

Complexity

Conditions	3
Paths	1

Size

Total Lines	29
Code Lines	16

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	16
CRAP Score	3

Importance

Changes	1
Bugs	0	Features	1

<?php
function hold()
{
    $args = func_get_args();
    $placeholder = pipe(
        filter(function ($x) {
            return _ === $x;
        }),
        function ($xs) {
            return array_keys($xs) ?: [];
        }
    );

    $hold = function (callable $fn) use ($placeholder) {
        $args = array_slice(func_get_args(), 1);
        $ks = $placeholder($args);

        return function ($x) use ($fn, $args, $ks) {
            if ([] === $ks) {
                return call_user_func_array($fn, array_merge($args, [$x]));
            }

            return call_user_func_array($fn, array_replace($args, [
                $ks[0] => $x
            ]));
        };
    };

    return call_user_func_array(partial($hold), $args);
}