code samples

\*
    TODO List:
    - Todo:
        - Structure of Interpreter (Daniel)
        - GUI mapping (API to map to WPF) (Daniel)
        - Constraints (Daniel)
            * Uniqueness of keyvalue pairs, 
            * which pairs are allowed in which structure
            * Type checking
                - return value type
                - expressions
                - list
                - ...
            * Unique identifier
            * Error reporting!
        - Make AST -> visit Parse Tree and rewrite (Jonatan)
        - Unit tests (Daniel & Jonatan)
            - Maybe testing harness? (Jonatan)
        - [asdf]{1,3} how to do this in ANTLR metadata *
        - Refactor Grammar
        
                text              tokens              Parse Tree               AST                          Instructions
        Input ----------> lexer ----------> Parser ---------------> Visitor ----------> Semantics Analyzer --------------> GUI
        


    Things to watch out for:
    - how to define comments (and let the lexer or parser strip them) x
    - how to say use 4 or more of these {4,...} 
    - how to remove whitspace (space, tabs, newlines) x
    - how to define strings x
    - how to stop lexer from removing whitespace from strings x
    - how to define list values (radio [1,2,3,4,5] or sth.) x
    - Use the grammar to enforce uniqueness of keyvaluepairs
    - Use the grammar to enforce required keyvaluepairs (Too liberal)
    - Value can be an expression! x

    Style suggestions:
    remove type from key value pair! x
    value pair: replace ':' with '=' x
    guards:
        value | a < b     = True     x
              | otherwise = False    x
*\