[jetti]

I think I may have misunderstood what your original comment was referring to. Were you saying that one doesn’t need a parser to make a working interpreter? I want to make sure that I understand the context of your comments because looking at the post you linked where you did this in C# you show you are using a recursive descent parser. It was when I saw the parser that I realized I could be way off base on what I was thinking you were talking about.

[naasking]

Yes, it doesn't need a parser. I didn't link to one post, it's a tag that links a series of posts discussing tagless interpreters. You can use the interpreter in the first post directly without the parser as well, it's a separate component. IQueryLanguage<T> is the interpreter definition.

[naasking]

I should note that the other posts go into more of the theory and background of final tagless encodings, including links to Oleg's site who has done a lot of work on them. They are a very flexible for implementing embedded languages.