Implemented the possibility for PHP >= 5.3 calling a constant

to instantiate an enum with the called constant value.

Author: marc-mabe

src/MabeEnum/Enum.php

@@ -118,4 +118,26 @@ final public function __toString()
     {
         return (string) $this->value;
     }
+
+    /**
+     * Instantiate an enum by a name of a constant.
+     *
+     * This will be called automatically on calling a method
+     * with the same name of a defined constant.
+     *
+     * NOTE: THIS WORKS FOR PHP >= 5.3 ONLY
+     *
+     * @param string $const The name of the constant to instantiate the enum with
+     * @param array  $args  There should be no arguments
+     * @throws BadMethodCallException
+     */
+    final public static function __callStatic($const, array $args)
+    {
+        $class      = get_called_class();
+        $classConst = $class . '::' . $const;
+        if (!defined($classConst)) {
+            throw new BadMethodCallException($classConst . ' not defined');
+        }
+        return new $class(constant($classConst));
+    }
 }

tests/MabeEnumTest/EnumTest.php

@@ -88,4 +88,15 @@ public function testConstuctorNonStrictValue()
         $this->assertSame(2, $enum->getValue());
         $this->assertSame(1, $enum->getOrdinal());
     }
+
+    public function testInstantiateUsingMagicMethod()
+    {
+        if (version_compare(PHP_VERSION, '5.3', '<')) {
+            $this->markTestSkipped("Instantiating using magic method doesn't work for PHP < 5.3");
+        }
+
+        $enum = MabeEnumTest_TestAsset_EnumInheritance::ONE();
+        $this->assertInstanceOf('MabeEnumTest_TestAsset_EnumInheritance', $enum);
+        $this->assertSame(MabeEnumTest_TestAsset_EnumInheritance::ONE, $enum->getValue());
+    }
 }