From 17c96b2834820a7fa96345b20fadfbffb42a4d0a Mon Sep 17 00:00:00 2001
From: Kacper Donat <kadet1090@gmail.com>
Date: Sun, 15 Jul 2018 23:00:49 +0200
Subject: [PATCH] force call if no args supplied for curried function

---
 src/Utils/CurriedFunction.php | 6 ++++++
 tests/CurriedFunctionTest.php | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/src/Utils/CurriedFunction.php b/src/Utils/CurriedFunction.php
index 5a13381..db0b9ae 100644
--- a/src/Utils/CurriedFunction.php
+++ b/src/Utils/CurriedFunction.php
@@ -14,6 +14,8 @@ use function Kadet\Functional\reflect;
 
 class CurriedFunction extends PartiallyAppliedFunction
 {
+    const INF = PHP_INT_MAX;
+
     private $threshold;
 
     /**
@@ -61,6 +63,10 @@ class CurriedFunction extends PartiallyAppliedFunction
      */
     public function __invoke(...$args)
     {
+        if (count($args) === 0) {
+            return $this->call();
+        }
+
         $applied = $this->apply(...$args);
 
         if (count($applied->getArguments()) >= $this->threshold) {
diff --git a/tests/CurriedFunctionTest.php b/tests/CurriedFunctionTest.php
index 05ee285..e289c78 100644
--- a/tests/CurriedFunctionTest.php
+++ b/tests/CurriedFunctionTest.php
@@ -111,6 +111,13 @@ class CurriedFunctionTest extends \PHPUnit\Framework\TestCase
         $this->assertSame('abc', $g->call('c'));
     }
 
+    public function testForceCallIfNoArgs()
+    {
+        $f = f\curry($this->variadic, f\Utils\CurriedFunction::INF);
+
+        $this->assertSame('abcdef', $f('a', 'b', 'c')('d', 'e')('f')());
+    }
+
     public function testUncurry()
     {
         $f = f\curry($this->variadic, 10);