public function testCurry()
{
$rest = 0;
$adder = function ($a, $b, $c, $d) {
return $a + $b + $c + $d;
};
$variadicAdder = function (...$args) {
return Std::foldl(function ($acc, $cur) {
return $acc + $cur;
}, 0, $args);
};
$partiallyVariadicAdder = function ($a, $b, $c, ...$args) use(&$rest) {
$rest = Std::foldl(function ($acc, $cur) {
return $acc + $cur;
}, 0, $args);
return $a + $b + $c;
};
$one = Std::curry($adder, 2, 5);
$two = $one(6);
// Here we test adding one additional parameter that was not expected.
// This should allow us to support partially variadic functions.
$three = $two(10, 1000);
$this->assertEquals(23, $three);
// Variadic functions will return immediately since we can't determine
// when they have been fulfilled.
$four = Std::curry($variadicAdder, 2, 5);
$this->assertEquals(ScalarTypes::SCALAR_INTEGER, TypeHound::fetch($four));
$this->assertEquals(7, $four);
$seven = Std::curry($partiallyVariadicAdder, 8, 5);
$eight = $seven(9, 102, 20);
$this->assertEquals(ScalarTypes::SCALAR_INTEGER, TypeHound::fetch($eight));
$this->assertEquals(22, $eight);
$this->assertEquals(122, $rest);
}