Idris2

The obvious solution is that the standard library would provide both options wherever appropriate, just like Rust has `borrow` and `borrow_mut`, `raw_entry` and `raw_entry_mut`, etc. You might be able to save some of this pain with some polymorphism, as some people suggest[0] for `&` and `&mut`, too. It might also be a good idea to look at the standard library of Idris 2[1] — it has linear types and garbage collection, so it has many of the same issues you describe, and it also seems to solve them with duplication where necessary[2], at least sometimes. [0]: https://github.com/rust-lang/rfcs/issues/414 [1]: https://github.com/idris-lang/Idris2/tree/master/libs/base [2]: https://github.com/idris-lang/Idris2/blob/master/libs/base/D...

I assume that you mean a code generator for Idris 2. I think the easiest way to get going is to start from an existing code generator. Idris 2 currently supports: Chez Scheme, Racket, Gambit Scheme and JavaScript. Pick the language you are most familiar with. The files that are relevant to the Chez Scheme code generator are located here (similar locations for the other code generators): https://github.com/idris-lang/Idris2/blob/master/src/Compile..., https://github.com/idris-lang/Idris2/blob/master/src/Compile..., https://github.com/idris-lang/Idris2/blob/master/support/che... The current code generators are based on an intermediate representations called `NamedCExp`, defined here: https://github.com/idris-lang/Idris2/blob/master/src/Core/Co... `NamedCExp` describe various forms an expression can take. These need to be translated into the

There are some minor changes, but they are documented in detail [1]. The Idris2 repository maintains tests to detect any further divergence from the book [2]. I highly recommend the book. Typing in examples and getting experience collaborating with the compiler on edits is worthwhile. Even if you never use Idris(2) again after reading it, the demos on creating state machine DSLs with contextual invariants will leave a lasting impression. [1] https://idris2.readthedocs.io/en/latest/typedd/typedd.html [2] https://github.com/idris-lang/Idris2/tree/master/tests/typed...