diff --git a/meta/definitions.php b/meta/definitions.php
index 009b0b0..2045a18 100644
--- a/meta/definitions.php
+++ b/meta/definitions.php
@@ -20,7 +20,10 @@ return [
     },
 
     Context::class => function($c) {
-        return new BaseContext($c->get(Lean\Lean::class)->getPiceaContext());
+        return new BaseContext(
+            defaultNamespace: $c->get(Lean\Lean::class)->getPiceaContext(),
+            declare: getenv('PICEA_DECLARE') ?? 'declare(strict_types=1)'
+        );
     },
 
     Compiler::class => autowire(Compiler::class),
diff --git a/src/Builder.php b/src/Builder.php
index 990880a..fd72786 100644
--- a/src/Builder.php
+++ b/src/Builder.php
@@ -22,6 +22,7 @@ class Builder
         $replace = [
             '%NAMESPACE%' => $context->namespace,
             '%USE%' => ( $uses = $context->renderUses() ) ? $uses : false,
+            '%DECLARE%' => $context->declare ? rtrim($context->declare, ';') . ';' : "",
             '%CLASSNAME%' => $context->className,
             '%PATHNAME%' => $path($context->viewPath),
             '%FULLPATH%' => $path($context->filePath),
diff --git a/src/Builder/ClassTemplate.php b/src/Builder/ClassTemplate.php
index 02e0d69..0231fc0 100644
--- a/src/Builder/ClassTemplate.php
+++ b/src/Builder/ClassTemplate.php
@@ -1,4 +1,4 @@
-<?php
+<?php %DECLARE%
 
 namespace %NAMESPACE%;
 
diff --git a/src/Compiler/BaseContext.php b/src/Compiler/BaseContext.php
index 2a657d9..bc51b9a 100644
--- a/src/Compiler/BaseContext.php
+++ b/src/Compiler/BaseContext.php
@@ -4,7 +4,25 @@ namespace Picea\Compiler;
 
 class BaseContext extends Context {
 
-    public function __construct(?string $defaultNamespace = null) {
+    public function __construct(
+        ?string $defaultNamespace = null,
+        public string $namespace = "",
+        public string $extendFrom = "",
+        public string $className = "",
+        public string $compiledSource = "",
+        public ? string $sectionAction = null,
+        public string $viewPath = "",
+        public string $filePath = "",
+        public string $classPath = "",
+        public string $declare = "declare(strict_types=1);",
+        public array $switchStack = [],
+        public array $iterationStack = [],
+        public array $useStack = [],
+        public array $sections = [],
+        public int $functions = 0,
+        public array $functionStack = [],
+        public array $hooks = []
+    ) {
         if ( $defaultNamespace !== null ) {
             $this->namespace = $defaultNamespace;
         }
diff --git a/src/Compiler/Context.php b/src/Compiler/Context.php
index 09db1e7..9eaab46 100644
--- a/src/Compiler/Context.php
+++ b/src/Compiler/Context.php
@@ -6,36 +6,6 @@ use Picea\Compiler;
 
 abstract class Context {
 
-    public string $namespace = "";
-
-    public string $extendFrom = "";
-
-    public string $className = "";
-
-    public string $compiledSource = "";
-
-    public ? string $sectionAction = null;
-
-    public string $viewPath = "";
-    
-    public string $filePath = "";
-
-    public string $classPath = "";
-
-    public array $switchStack = [];
-
-    public array $iterationStack = [];
-
-    public array $useStack = [];
-
-    public array $sections = [];
-
-    public int $functions = 0;
-    
-    public array $functionStack = [];
-
-    public array $hooks = [];
-
     public Compiler $compiler;
 
     public function hook(string $path, Callable $callback) : self
diff --git a/src/ControlStructure/BlockToken.php b/src/ControlStructure/BlockToken.php
index 63433ed..05c828d 100644
--- a/src/ControlStructure/BlockToken.php
+++ b/src/ControlStructure/BlockToken.php
@@ -2,16 +2,21 @@
 
 namespace Picea\ControlStructure;
 
+use http\Exception\InvalidArgumentException;
+
 class BlockToken implements ControlStructure {
 
-    public array $token = [ "arguments", "block", "endblock", "/block", "define", "slot", "endslot", "/slot", "using" ];
+    public array $token = [ "arguments", "block", "endblock", "/block", "define", "slot", "endslot", "/slot", "using", "public", "private", "protected", "set" ];
 
     public function parse(\Picea\Compiler\Context &$context, ?string $arguments, string $token, array $options = []) : string
     {
         static $depth = 0;
+        static $slotDepth = 0;
         static $slotDefinitions = [];
+        static $slotName = [];
+        $class= static::class;
 
-        # dump($depth, $token, $arguments, $slotDefinitions);
+         # dump($slotDepth, $token, $arguments, $slotDefinitions);
 
         switch($token) {
             case "block":
@@ -26,8 +31,6 @@ class BlockToken implements ControlStructure {
                 return "<?php echo \$___block->render(\$___class__template); unset(\$___block); ?>";
 
             case "arguments":
-                $class = static::class;
-
                 return <<<PHP
                     <?php 
                         try {
@@ -60,20 +63,21 @@ class BlockToken implements ControlStructure {
                 list($name, $definition) = array_pad(explode(',', $arguments, 2), 2, "");
 
                 $loops = count($context->iterationStack ?? []) ? ",". implode(', ', array_filter(array_column($context->iterationStack, 'uid'), fn($e) => strpos($e, '[') === false)) : null;
+                $slotDepth++;
 
                 if ($def->hasDefinitions() ) {
-                    $slotName = eval("return $name;");
-                    $def->currentSlot = $slotName;
-                    $def->setDefinitionVars($slotName, $definition);
+                    $slotName[] = eval("return $name;");
+                    $def->currentSlot = end($slotName);
+                    $def->setDefinitionVars(end($slotName), $definition);
 
-                    $definition = $def->printDefinition($slotName);
+                    $definition = $def->printDefinition(end($slotName));
 
                     if ($definition) {
                         $definition .= ",";
                     }
 
                     return <<<PHP
-                    <?php \$this->printSlot($name, function($definition array \$___using = []) use (\$picea $loops) { extract(\$___using, \EXTR_SKIP); ?>
+                    <?php \$this->printSlot($name, function($definition array \$___using = []) use (\$picea, \$___class__template $loops) { extract(\$___using, \EXTR_SKIP); ?>
                     PHP;
                 }
                 else {
@@ -82,15 +86,17 @@ class BlockToken implements ControlStructure {
                     }
 
                     return <<<PHP
-                    <?php (\$___block ?? \$this)->slotIsSet($name) || (\$___block ?? \$this)->setSlot($name, function($definition array \$___using = []) use (\$picea $loops) { extract(\$___using, \EXTR_SKIP); ?>
+                    <?php (\$___block ?? \$this)->slotIsSet($name) || (\$___block ?? \$this)->setSlot($name, function($definition array \$___using = []) use (\$picea, \$___class__template $loops) { extract(\$___using, \EXTR_SKIP); ?>
                     PHP;
                 }
 
             case "/slot":
             case "endslot":
+                $slotDepth--;
                 $def = ( $slotDefinitions[$depth] ?? end($slotDefinitions) );
 
                 if ($def->hasDefinitions() ) {
+                    $def->currentSlot = array_pop($slotName);
                     $definition = $def->getCurrentSlotDefinitionVars();
 
                     if ($definition) {
@@ -105,9 +111,21 @@ class BlockToken implements ControlStructure {
                     return "<?php }); ?>";
                 }
 
+            case "public":
+            case "private":
+            case "protected":
+                $arguments = rtrim($arguments, ';');
+                return "<?php \$this->createProperty(\\$class::parseProperty('$token', fn($arguments) => func_get_arg(0))) ?>";
+
+            case "set":
+                return "<?php \$___block->setPropertyValue({$arguments}); ?>";
+
+            # DEPRECATED ; should be removed, to be superseded by 'set' instead
             case "using":
                 return "<?php \$___block->setUsing($arguments); ?>";
         }
+
+        throw new \LogicException("Unhandled token ? Should never have been here !");
     }
 
     public function inlineHtml(? object $proxy, string $viewPath, ... $variables) {
@@ -119,7 +137,6 @@ class BlockToken implements ControlStructure {
         #return
     }
 
-
     public static function parseArguments(Callable $method, array $arguments) : array
     {
         try{
@@ -131,7 +148,6 @@ class BlockToken implements ControlStructure {
 
         $parameters = [];
 
-
         foreach((new \ReflectionFunction($method))->getParameters() as $key => $value) {
             $name = $value->getName();
 
@@ -158,6 +174,26 @@ class BlockToken implements ControlStructure {
         return $parameters;
     }
 
+    public static function parseProperty(string $token, \Closure $method) : BlockToken\Property
+    {
+        foreach((new \ReflectionFunction($method))->getParameters() as $value) {
+            $property = new BlockToken\Property(
+                name: $value->getName(),
+                scope: BlockToken\PropertyScopeEnum::from($token),
+                setter: $method,
+            );
+
+            if ($value->isDefaultValueAvailable()) {
+                $property->value = $value->getDefaultValue();
+            }
+
+            # For now, we only allow one declaration per token, might be revised at another moment...
+            break;
+        }
+
+        return $property ?? throw new \LogicException("No parameters found in property declaration.");
+    }
+
     public static function slotDefinitions() {
         return new class() {
 
@@ -230,6 +266,10 @@ class BlockToken implements ControlStructure {
 
             public array $definition = [];
 
+            protected array $properties = [];
+
+            private array $definedPropertyValues = [];
+
             public function __construct(string $viewPath, ...$arguments) {
                 $this->viewPath = $viewPath;
                 $this->arguments = $arguments;
@@ -261,14 +301,51 @@ class BlockToken implements ControlStructure {
                 return ! empty($this->slots[$name]);
             }
 
-            public function printSlot(string $name, Callable $default)
+            public function printSlot(string $name, Callable $default) : mixed
             {
                 return $this->slotIsSet($name) ? $this->slots[$name] : $default;
             }
 
-            public function setUsing(array $variables) {
+            public function setUsing(array $variables) : void
+            {
                 $this->using = $variables;
             }
+
+            public function setPropertyValue(array $vars) : void
+            {
+                foreach($vars as $key => $value) {
+                    $this->definedPropertyValues[$key] = $value;
+                }
+            }
+
+            public function createProperty(BlockToken\Property $property) : void
+            {
+                if (isset($this->properties[$property->name])) {
+                    throw new \InvalidArgumentException("Given property '{$property->name}' is already defined somewhere else in this block.");
+                }
+
+                $this->properties[$property->name] = $property;
+
+                if (isset($this->definedPropertyValues[$property->name])) {
+                    if ($property->scope !== BlockToken\PropertyScopeEnum::Public) {
+                        throw new \InvalidArgumentException(
+                            sprintf("Trying to set property %s but it's scope (%s) makes it impossible", $property->name, $property->scope->name)
+                        );
+                    }
+
+                    $this->__set($property->name, $this->definedPropertyValues[$property->name]);
+                }
+            }
+
+            public function __set(string $name, mixed $value) : void
+            {
+                $this->properties[$name]->value = call_user_func($this->properties[$name]->setter, $value);
+            }
+
+            public function __get(string $name) : mixed
+            {
+                return $this->properties[$name]->value;
+            }
         };
     }
 }
\ No newline at end of file
diff --git a/src/ControlStructure/BlockToken/Property.php b/src/ControlStructure/BlockToken/Property.php
new file mode 100644
index 0000000..049c1a6
--- /dev/null
+++ b/src/ControlStructure/BlockToken/Property.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Picea\ControlStructure\BlockToken;
+
+class Property
+{
+    public mixed $value;
+
+    public function __construct(
+        public readonly string $name,
+        public readonly PropertyScopeEnum $scope,
+        public readonly \Closure $setter,
+    ) {}
+}
\ No newline at end of file
diff --git a/src/ControlStructure/BlockToken/PropertyScopeEnum.php b/src/ControlStructure/BlockToken/PropertyScopeEnum.php
new file mode 100644
index 0000000..3566c76
--- /dev/null
+++ b/src/ControlStructure/BlockToken/PropertyScopeEnum.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Picea\ControlStructure\BlockToken;
+
+enum PropertyScopeEnum: string
+{
+    case Private = "private";
+    case Protected = "protected";
+    case Public = "public";
+}
\ No newline at end of file
diff --git a/src/ControlStructure/BreakToken.php b/src/ControlStructure/BreakToken.php
index dafdee5..83af445 100644
--- a/src/ControlStructure/BreakToken.php
+++ b/src/ControlStructure/BreakToken.php
@@ -4,7 +4,7 @@ namespace Picea\ControlStructure;
 
 class BreakToken implements ControlStructure {
 
-    public string $token = "break";
+    public array $token = [ "break", "/case" ];
 
     public function parse(\Picea\Compiler\Context &$context, ?string $arguments, string $token, array $options = []) : string
     {
diff --git a/src/ControlStructure/SwitchToken.php b/src/ControlStructure/SwitchToken.php
index 9768c8d..18d7a08 100644
--- a/src/ControlStructure/SwitchToken.php
+++ b/src/ControlStructure/SwitchToken.php
@@ -4,7 +4,7 @@ namespace Picea\ControlStructure;
 
 class SwitchToken implements ControlStructure {
 
-    public array $token = [ "switch", "case", "endswitch" ];
+    public array $token = [ "switch", "case", "endcase", "endswitch", "/switch" ];
 
     public function parse(\Picea\Compiler\Context &$context, ?string $arguments, string $token, array $options = []) : string {
         switch($token) {
diff --git a/src/Extension/TitleExtension.php b/src/Extension/TitleExtension.php
index 5f01e68..5efd9c0 100644
--- a/src/Extension/TitleExtension.php
+++ b/src/Extension/TitleExtension.php
@@ -23,7 +23,7 @@ class TitleExtension implements Extension, FunctionExtension {
                 "} ?>";
     }
     
-    public function handleTitle(? string $set = null, ...$arguments) : ? string
+    public function handleTitle(null|\Stringable|string $set = null, ...$arguments) : ? string
     {
         if ( $set === null ) {
             return $this->title;
@@ -31,6 +31,7 @@ class TitleExtension implements Extension, FunctionExtension {
         else {
             # Fixed a bug where template inheritance was rewriting title
             if ( empty($this->title) ) {
+                $set = (string) $set;
                 $this->title = $arguments ? sprintf($set, ...$arguments) : $set;
             }
         }
diff --git a/src/Extension/UrlExtension.php b/src/Extension/UrlExtension.php
index afe3c5f..8788560 100644
--- a/src/Extension/UrlExtension.php
+++ b/src/Extension/UrlExtension.php
@@ -138,9 +138,9 @@ PATTERN;
     }
 
     # src: https://stackoverflow.com/a/14550919
-    public static function slug(string $text, string $separator = '-') : string
+    public static function slug(\Stringable|string $text, string $separator = '-') : string
     {
-        $clean = iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $text);
+        $clean = iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', (string) $text);
         $clean = preg_replace("/[^a-zA-Z0-9\/_| -]/", '', $clean);
 
         return preg_replace("/[\/_| -]+/", $separator, strtolower(trim($clean, '-')));