For graphviz [1], I'm thinking of adding in some quasi-quoting support for things like record labels [2], to make them easier to use and less verbose to define (i.e. by using actual Dot syntax [3] for them). If I wanted anti-quotation support in those though, what would be the preferable/recommended option? * Extend the current data types to also have the anti-quotation types (but don't export those constructors), adapt the parser accordingly and use that (though for quasi-quotation I'd need to convert the input String into a Text value, as that's what the existing parsers use). However, this means there's a chance that the anti-quotation types will leak through (and possibly cause problems when parsing real Dot code when the anti-quotation notation is found). This second complication could be relaxed with a Bool flag to the parser indicating whether or not anti-quotation should be supported, but it still feels a bit awkward to me. * Define new data types with anti-quotation support with new parsers for them, and after anti-quotation is evaluated convert them to the real data types. Requires duplicate work, etc. [1]: http://projects.haskell.org/graphviz/ [2]: http://hackage.haskell.org/packages/archive/graphviz/2999.12.0.3/doc/html/Da... [3]: http://www.graphviz.org/doc/info/shapes.html#record -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com