src/cond.php ➔ cond()

Complexity

Conditions	1
Paths	1

Size

Total Lines	20
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	1

Importance

Changes

0

<?php
function cond(array $pairs): \Closure
{
    return function ($x) use ($pairs) {
        $pair = head($pairs);

        $lazyfn = function ($x) use ($pairs) {
            $xs = tail($pairs);
            return cond($xs)($x);
        };

        $throw = function() {
            throw new \InvalidArgumentException();
        };

        return ifElse($pair[0] ?? $throw())
            ($pair[1] ?? $throw())
            ($lazyfn)
            ($x);
    };
}