architecture.uml

@startuml
actor User
User -> Lexer : Provide source code


alt success
    Lexer -> Parser : Build token stream

    Parser -> "Symbol Manager" : Build AST

    alt success
        "Symbol Manager" -> "Semantic Validator": Build Symbol table\nincluding types, scope,\nplace of declaration/initalization

        alt success
            "Semantic Validator" -> "Optimizer" : Validate AST(e.g.\nno assignment to function,\nno call to variable,\nno missing main function)

            "Optimizer" -> "Code Generator": Optimize AST

            "Code Generator" -> "Optimizer": Generate bytecode

            "Optimizer" -> Interpreter: Optimize bytecode

            "Interpreter" -> User: Interprete code and show result
        else Semantic error
            "Semantic Validator" -> User: Error: e.g. Unkown variable referenced
        end
    else Unexpected token
        "Parser" -> User: Unexpected token at position ... 
    end
else Invalid token
    Lexer -> User: Error: Invalid token at position ...
end
@enduml