Split code generation from the ui

source/lexer.cpp

@@ -1,9 +1,7 @@
 #include "elna/source/lexer.hpp"
 #include <variant>
 
-namespace elna
-{
-namespace source
+namespace elna::source
 {
     using source_position = elna::source::position;
     using source_error = elna::source::error;
@@ -287,4 +285,3 @@ namespace source
         return source_result(tokens);
     }
 }
-}