added type hints

src/Node/EmbedNode.php

@@ -31,7 +31,7 @@ class EmbedNode extends IncludeNode
         $this->setAttribute('index', $index);
     }
 
-    protected function addGetTemplate(Compiler $compiler)
+    protected function addGetTemplate(Compiler $compiler): void
     {
         $compiler
             ->write('$this->loadTemplate(')

src/Node/Expression/ArrayExpression.php

@@ -29,10 +29,9 @@ class ArrayExpression extends AbstractExpression
         }
     }
 
-    public function getKeyValuePairs()
+    public function getKeyValuePairs(): array
     {
         $pairs = [];
-
         foreach (array_chunk($this->nodes, 2) as $pair) {
             $pairs[] = [
                 'key' => $pair[0],
@@ -43,7 +42,7 @@ class ArrayExpression extends AbstractExpression
         return $pairs;
     }
 
-    public function hasElement(AbstractExpression $key)
+    public function hasElement(AbstractExpression $key): bool
     {
         foreach ($this->getKeyValuePairs() as $pair) {
             // we compare the string representation of the keys
@@ -56,7 +55,7 @@ class ArrayExpression extends AbstractExpression
         return false;
     }
 
-    public function addElement(AbstractExpression $value, AbstractExpression $key = null)
+    public function addElement(AbstractExpression $value, AbstractExpression $key = null): void
     {
         if (null === $key) {
             $key = new ConstantExpression(++$this->index, $value->getTemplateLine());

src/Node/Expression/Binary/AbstractBinary.php

@@ -38,5 +38,5 @@ abstract class AbstractBinary extends AbstractExpression
         ;
     }
 
-    abstract public function operator(Compiler $compiler);
+    abstract public function operator(Compiler $compiler): Compiler;
 }

src/Node/Expression/Binary/AddBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class AddBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('+');
     }

src/Node/Expression/Binary/AndBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class AndBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('&&');
     }

src/Node/Expression/Binary/BitwiseAndBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class BitwiseAndBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('&');
     }

src/Node/Expression/Binary/BitwiseOrBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class BitwiseOrBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('|');
     }

src/Node/Expression/Binary/BitwiseXorBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class BitwiseXorBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('^');
     }

src/Node/Expression/Binary/ConcatBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class ConcatBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('.');
     }

src/Node/Expression/Binary/DivBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class DivBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('/');
     }

src/Node/Expression/Binary/EndsWithBinary.php

@@ -28,7 +28,7 @@ class EndsWithBinary extends AbstractBinary
         ;
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('');
     }

src/Node/Expression/Binary/EqualBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class EqualBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('==');
     }

src/Node/Expression/Binary/FloorDivBinary.php

@@ -22,7 +22,7 @@ class FloorDivBinary extends AbstractBinary
         $compiler->raw(')');
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('/');
     }

src/Node/Expression/Binary/GreaterBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class GreaterBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('>');
     }

src/Node/Expression/Binary/GreaterEqualBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class GreaterEqualBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('>=');
     }

src/Node/Expression/Binary/InBinary.php

@@ -26,7 +26,7 @@ class InBinary extends AbstractBinary
         ;
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('in');
     }

src/Node/Expression/Binary/LessBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class LessBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('<');
     }

src/Node/Expression/Binary/LessEqualBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class LessEqualBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('<=');
     }

src/Node/Expression/Binary/MatchesBinary.php

@@ -26,7 +26,7 @@ class MatchesBinary extends AbstractBinary
         ;
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('');
     }

src/Node/Expression/Binary/ModBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class ModBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('%');
     }

src/Node/Expression/Binary/MulBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class MulBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('*');
     }

src/Node/Expression/Binary/NotEqualBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class NotEqualBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('!=');
     }

src/Node/Expression/Binary/NotInBinary.php

@@ -26,7 +26,7 @@ class NotInBinary extends AbstractBinary
         ;
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('not in');
     }

src/Node/Expression/Binary/OrBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class OrBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('||');
     }

src/Node/Expression/Binary/PowerBinary.php

@@ -15,7 +15,7 @@ use Twig\Compiler;
 
 class PowerBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('**');
     }

src/Node/Expression/Binary/RangeBinary.php

@@ -26,7 +26,7 @@ class RangeBinary extends AbstractBinary
         ;
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('..');
     }

src/Node/Expression/Binary/StartsWithBinary.php

@@ -28,7 +28,7 @@ class StartsWithBinary extends AbstractBinary
         ;
     }
 
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('');
     }

src/Node/Expression/Binary/SubBinary.php

@@ -16,7 +16,7 @@ use Twig\Compiler;
 
 class SubBinary extends AbstractBinary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
         return $compiler->raw('-');
     }

src/Node/Expression/CallExpression.php

@@ -60,7 +60,7 @@ abstract class CallExpression extends AbstractExpression
         }
     }
 
-    protected function compileArguments(Compiler $compiler, $isArray = false)
+    protected function compileArguments(Compiler $compiler, $isArray = false): void
     {
         $compiler->raw($isArray ? '[' : '(');
 
@@ -228,7 +228,7 @@ abstract class CallExpression extends AbstractExpression
         return $arguments;
     }
 
-    protected function normalizeName($name)
+    protected function normalizeName(string $name): string
     {
         return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], $name));
     }

src/Node/Expression/Unary/AbstractUnary.php

@@ -30,5 +30,5 @@ abstract class AbstractUnary extends AbstractExpression
         $compiler->subcompile($this->getNode('node'));
     }
 
-    abstract public function operator(Compiler $compiler);
+    abstract public function operator(Compiler $compiler): Compiler;
 }

src/Node/Expression/Unary/NegUnary.php

@@ -16,8 +16,8 @@ use Twig\Compiler;
 
 class NegUnary extends AbstractUnary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
-        $compiler->raw('-');
+        return $compiler->raw('-');
     }
 }

src/Node/Expression/Unary/NotUnary.php

@@ -16,8 +16,8 @@ use Twig\Compiler;
 
 class NotUnary extends AbstractUnary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
-        $compiler->raw('!');
+        return $compiler->raw('!');
     }
 }

src/Node/Expression/Unary/PosUnary.php

@@ -16,8 +16,8 @@ use Twig\Compiler;
 
 class PosUnary extends AbstractUnary
 {
-    public function operator(Compiler $compiler)
+    public function operator(Compiler $compiler): Compiler
     {
-        $compiler->raw('+');
+        return $compiler->raw('+');
     }
 }

src/Profiler/NodeVisitor/ProfilerNodeVisitor.php

@@ -17,7 +17,7 @@ use Twig\Node\BodyNode;
 use Twig\Node\MacroNode;
 use Twig\Node\ModuleNode;
 use Twig\Node\Node;
-use Twig\NodeVisitor\AbstractNodeVisitor;
+use Twig\NodeVisitor\NodeVisitorInterface;
 use Twig\Profiler\Node\EnterProfileNode;
 use Twig\Profiler\Node\LeaveProfileNode;
 use Twig\Profiler\Profile;
@@ -34,12 +34,12 @@ final class ProfilerNodeVisitor implements NodeVisitorInterface
         $this->extensionName = $extensionName;
     }
 
-    protected function doEnterNode(Node $node, Environment $env)
+    public function enterNode(Node $node, Environment $env): Node
     {
         return $node;
     }
 
-    protected function doLeaveNode(Node $node, Environment $env)
+    public function leaveNode(Node $node, Environment $env): ?Node
     {
         if ($node instanceof ModuleNode) {
             $varName = $this->getVarName();
@@ -69,7 +69,7 @@ final class ProfilerNodeVisitor implements NodeVisitorInterface
         return sprintf('__internal_%s', hash('sha256', $this->extensionName));
     }
 
-    public function getPriority()
+    public function getPriority(): int
     {
         return 0;
     }

src/RuntimeLoader/ContainerRuntimeLoader.php

@@ -32,8 +32,6 @@ class ContainerRuntimeLoader implements RuntimeLoaderInterface
 
     public function load(string $class)
     {
-        if ($this->container->has($class)) {
-            return $this->container->get($class);
-        }
+        return $this->container->has($class) ? $this->container->get($class) : null;
     }
 }

src/RuntimeLoader/FactoryRuntimeLoader.php

@@ -30,10 +30,12 @@ class FactoryRuntimeLoader implements RuntimeLoaderInterface
 
     public function load(string $class)
     {
-        if (isset($this->map[$class])) {
-            $runtimeFactory = $this->map[$class];
-
-            return $runtimeFactory();
+        if (!isset($this->map[$class])) {
+            return null;
         }
+
+        $runtimeFactory = $this->map[$class];
+
+        return $runtimeFactory();
     }
 }