Hi Hongwei, just for the record, let me put down some offline discussions. 

1. Programmers can decide how a literal is parsed, or even write some 
plugins to parse some custom literals. For instance, 1 can be interpreted 
as int, nat, and int(1) etc. Programmers should be able to either turn a 
knob, or annotate the literal, to switch among interpretations. 
2. Some meta-programming supports via templates. E.g. `derive` of Haskell. 
3. Formalization of templates.
4. Module systems. 
5. Session types :)
6. Modular design of the whole tool chain. E.g. parsing, type equality, 
constraints solving, template dispatch, type erasure, etc. 
7. Maybe database-based compilations? We can store compiled blocks as a 
(hash, binary IR) pairs in some file-based databases, for easy reuse. Not 
sure how feasible it is. 
8. Interpreter, REPL, language servers, documentation tools, standard 
libraries, type inference, etc. 
9. More importantly, a process for open source contribution. 


On Friday, February 9, 2018 at 1:15:22 PM UTC-5, gmhwxi wrote:
> For the moment, I just want to open a thread for ATS3.
> I decided to pick ATS/Xanadu for the full project name. I like the name 
> Xanadu
> because it is poetic and brings a feel of exoticness.
> ATS3 is supposed to be compiled to ATS2. At least at the beginning. I will 
> try to
> write more about what I have in mind regarding ATS3.
> I know that a lot of people have been complaining about the syntax of 
> ATS2. So
> we can start the effort of designing some "nice" syntax for ATS3. Please 
> feel free
> to post here if you would like share your opinions and ideas.
> I will be happy to take the lead but we definitely need to have some form 
> of community
> effort on this project given its size and scope.
> Cheers!
> --Hongwei
> PS: I felt rushed every time up to now when implementing ATS. This time I 
> am hoping
> to have the luxury of thinking about implementation a bit before actually 
> doing it :)

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