/**
* @inheritdoc
*/
public function concat(FantasyLand\Semigroup $value)
{
if ($value instanceof self) {
return self::of($this->value . $value->extract());
}
throw new TypeMismatchError($value, self::class);
}
/**
* @inheritdoc
*/
public function concat(FantasyLand\Semigroup $value)
{
if ($value instanceof self) {
return self::of($value->reduce(function ($accumulator, $item) {
$accumulator[] = $item;
return $accumulator;
}, $this->extract()));
}
throw new TypeMismatchError($value, self::class);
}
/**
* concatM :: a -> a -> a
*
* @param Semigroup $a
* @param Semigroup $b
*
* @return Semigroup
*/
function concatM(Semigroup $a, Semigroup $b)
{
return call_user_func_array(curryN(2, function (Semigroup $a, Semigroup $b) {
return $a->concat($b);
}), func_get_args());
}