- A lot of bugfixes made for this release.

src/Compiler.php

@@ -2,6 +2,7 @@
 
 namespace Picea;
 
+use Picea\Extension\FunctionExtension;
 use Picea\Language\LanguageRegistration;
 
 class Compiler
@@ -94,13 +95,35 @@ class Compiler
 
     public function registerExtension(Extension\Extension $extension) : self
     {
-        foreach($extension->tokens ?? (array) ( $extension->token ?? [] ) as $token) {
+        $tokens = $extension->tokens ?? (array) ( $extension->token ?? [] );
+
+        foreach($tokens as $token) {
             $this->extensionList[$token] = $extension;
         }
 
+        if (! $tokens ) {
+            $this->extensionList[] = $extension;
+        }
+
         return $this;
     }
-    
+
+    public function registerExtensionsFunctions(Compiler\Context $context) : void
+    {
+        foreach($this->extensionList as $ext) {
+            if ($ext instanceof FunctionExtension) {
+                foreach ($ext->exportFunctions() as $name => $value) {
+                    if ( is_string($value) ) {
+                        $callable = fn(...$args) => call_user_func_array([ $ext, $value ], $args);
+                    }
+
+                    $context->pushFunction(is_numeric($name) ? $value : $name, $callable ?? $value);
+                }
+            }
+        }
+
+    }
+
     public function getExtensionFromToken(string $name) : Extension\Extension
     {
         if ( false === $this->extensionList[$name] ?? false ) {