diff --git a/src/Fenom.php b/src/Fenom.php
index 2d6413d..4334b33 100644
--- a/src/Fenom.php
+++ b/src/Fenom.php
@@ -742,12 +742,12 @@ class Fenom {
      * @throws \RuntimeException if key from custom assoc doesn't exists into possible values
      */
     private static function _makeMask(array $values, array $options, $mask = 0) {
-        foreach($values as $value) {
-            if(isset($options[$value])) {
-                if($options[$value]) {
-                    $mask |= $options[$value];
+        foreach ($values as $key=>$value) {
+            if (isset($options[$key])) {
+                if ($options[$key]) {
+                    $mask |= $options[$key];
                 } else {
-                    $mask &= ~$options[$value];
+                    $mask &= ~$options[$key];
                 }
             } else {
                 throw new \RuntimeException("Undefined parameter $value");
diff --git a/src/Fenom/Compiler.php b/src/Fenom/Compiler.php
index f6d0b08..d125856 100644
--- a/src/Fenom/Compiler.php
+++ b/src/Fenom/Compiler.php
@@ -615,7 +615,7 @@ class Compiler {
             } elseif(isset($params[ $param->getPosition() ])) {
                 $args[] = $params[ $param->getPosition() ];
             } elseif($param->isOptional()) {
-                $args[] = $param->getDefaultValue();
+                $args[] = var_export($param->getDefaultValue(), true);
             }
         }
         return "$function(".implode(", ", $args).')';
diff --git a/src/Fenom/Template.php b/src/Fenom/Template.php
index 46f51e8..0e7e04d 100644
--- a/src/Fenom/Template.php
+++ b/src/Fenom/Template.php
@@ -62,7 +62,6 @@ class Template extends Render {
      * Escape outputs value
      * @var bool
      */
-//    public $escape = false;
     public $escape = false;
     public $_extends;
     public $_extended = false;
@@ -648,12 +647,12 @@ class Template extends Render {
                     throw new TokenizeException("Unexpected token ".$tokens->getNext().", isset() and empty() accept only variables");
                 }
                 $term = true;
-            } elseif(!$term && $tokens->is(Tokenizer::MACRO_UNARY)) { // like unary operator, see Tokenizer::MACRO_UNARY
-                if(!$tokens->isNext(T_VARIABLE, T_DNUMBER, T_LNUMBER, T_STRING, T_ISSET, T_EMPTY)) {
+            } elseif(!$term && $tokens->is(Tokenizer::MACRO_UNARY)) {
+                if(!$tokens->isNext(T_VARIABLE, T_DNUMBER, T_LNUMBER, T_STRING, T_ISSET, T_EMPTY, '(')) {
                     break;
                 }
                 $_exp[] = $tokens->getAndNext();
-                $term = false;
+                $term = 0;
             } elseif($tokens->is(Tokenizer::MACRO_BINARY)) { // like binary operator, see Tokenizer::MACRO_BINARY
                 if(!$term) {
                     throw new UnexpectedTokenException($tokens);
@@ -671,6 +670,8 @@ class Template extends Render {
                 }
                 $_exp[] = " ".$tokens->getAndNext()." ";
                 $term = 0;
+            } elseif($tokens->is('[')) {
+				$_exp[] = $this->parseArray($tokens);
             } else {
                 break;
             }
@@ -1284,7 +1285,7 @@ class Template extends Render {
                 }
                 if($tokens->is("=")) {
                     $tokens->next();
-                    $params[ $key ] = $this->parseExp($tokens);
+					$params[ $key ] = $this->parseExp($tokens);
                 } else {
                     $params[ $key ] = 'true';
                 }
diff --git a/tests/cases/Fenom/FunctionsTest.php b/tests/cases/Fenom/FunctionsTest.php
new file mode 100644
index 0000000..755a1e0
--- /dev/null
+++ b/tests/cases/Fenom/FunctionsTest.php
@@ -0,0 +1,70 @@
+<?php
+namespace Fenom;
+
+class FunctionsTest extends TestCase {
+
+	const FUNCTION_ARGUMENT_CONSTANT = 1;
+
+	public static function functionSum($of = array()) {
+		return array_sum($of);
+	}
+
+	public static function functionPow($a, $n = 2) {
+		return pow($a, $n);
+	}
+
+	public static function functionInc($a, $i = self::FUNCTION_ARGUMENT_CONSTANT) {
+		return $a + $i;
+	}
+
+	public function setUp() {
+        parent::setUp();
+		$this->fenom->addFunctionSmart('sum', __CLASS__ . '::functionSum');
+		$this->fenom->addFunctionSmart('pow', __CLASS__ . '::functionPow');
+		$this->fenom->addFunctionSmart('inc', __CLASS__ . '::functionInc');
+
+        $this->tpl('function_params_scalar.tpl', 				'{pow a=2 n=3}');
+        $this->tpl('function_params_dynamic.tpl', 				'{pow a=$a n=$n}');
+        $this->tpl('function_default_param_scalar.tpl', 		'{pow a=2}');
+        $this->tpl('function_default_param_empty_array.tpl', 	'{sum}');
+        $this->tpl('function_default_param_const.tpl', 			'{inc a=1}');
+        $this->tpl('function_array_param.tpl',					'{sum of=[1, 2, 3, 4, 5]}');
+        $this->tpl('function_array_param_pos.tpl',				'{sum [1, 2, 3, 4, 5]}');
+	}
+
+    public function testFunctionWithParams() {
+        $output = $this->fenom->fetch('function_params_scalar.tpl');
+		$this->assertEquals('8', $output);
+    }
+
+	public function testFunctionWithDynamicParams() {
+        $output = $this->fenom->fetch('function_params_dynamic.tpl', array('a' => 3, 'n' => 4));
+		$this->assertEquals('81', $output);
+    }
+
+	public function testFunctionWithDefaultParamScalar() {
+		$output = $this->fenom->fetch('function_default_param_scalar.tpl');
+		$this->assertEquals('4', $output);
+	}
+
+	public function testFunctionWithDefaultParamArray() {
+		$output = $this->fenom->fetch('function_default_param_empty_array.tpl');
+		$this->assertEquals('0', $output);
+	}
+
+	public function testFunctionWithDefaultParamConst() {
+		$output = $this->fenom->fetch('function_default_param_const.tpl');
+		$this->assertEquals('2', $output);
+	}
+
+	public function testFunctionWithArrayNamedParam() {
+		$output = $this->fenom->fetch('function_array_param.tpl');
+		$this->assertEquals('15', $output);
+	}
+
+	public function testFunctionWithArrayPositionalParam() {
+		$output = $this->fenom->fetch('function_array_param_pos.tpl');
+		$this->assertEquals('15', $output);
+	}
+
+}
diff --git a/tests/cases/Fenom/TemplateTest.php b/tests/cases/Fenom/TemplateTest.php
index e61e935..7ae60e0 100644
--- a/tests/cases/Fenom/TemplateTest.php
+++ b/tests/cases/Fenom/TemplateTest.php
@@ -157,8 +157,9 @@ class TemplateTest extends TestCase {
             array('Exp: {$y-$x} result',                        $b, 'Exp: 18 result'),
             array('Exp: {$y*$x} result',                        $b, 'Exp: 243 result'),
             array('Exp: {$y^$x} result',                        $b, 'Exp: 18 result'),
-            array('Exp: {-$x} result',                          $b, 'Exp: -9 result'),
+            array('Exp: {-($x)} result',                        $b, 'Exp: -9 result'),
             array('Exp: {!$x} result',                          $b, 'Exp: result'),
+            array('Exp: {!($x)} result',                        $b, 'Exp: result'),
             array('Exp: {!5} result',                           $b, 'Exp: result'),
             array('Exp: {-1} result',                           $b, 'Exp: -1 result'),
             array('Exp: {$z = 5} {$z} result',                  $b, 'Exp: 5 5 result'),