Add support for a zero-sized Unit type. This requires some special at
the codegen level because LLVM (unsurprisingly) only allows Void types
in function return position - to make that a little easier to handle
there's a new pass that strips any unit-only expressions and pulls
unit-only function arguments up to new `let` bindings, so we never have
to actually pass around unit values.
Change-Id: I0fc18a516821f2d69172c42a6a5d246b23471e38
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2695
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
Implement very basic monomorphization, by recording type variable
instantiations when typechecking Call nodes and then using those in a
new hir Visitor trait to copy the body of any generic decls for each
possible set of instantiation of the type variables.
Change-Id: Iab54030973e5d66e2b8bcd074b4cb6c001a90123
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2617
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
The step of "universalizing" function expressions was conflicting with
top-level ascriptions for polymorphic function declarations:
universalization generates universal type variables, and top-level
polymorphic ascription *also* generates universal type variables, and
the two were conflicting with each other when unifying. Let's just get
rid of this now, and we can bring it back in a more principled manner
once we do actual let-generalization (which there's still an ignored
test case for)
Change-Id: Idc08c8cb5ac92d1e6e1e63c9b8729176cab73f44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2616
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
This makes parsing less ambiguous, which is nice (we can continue to not
actually care about indentation!) and aligns nicely with `fn` for the
declaration itself.
Change-Id: Id48f064e2a1e01c5105297be355d0991b312b76d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2615
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Implement extern decls, which codegen to LLVM as forward-declared
functions, and use these as a hook into calling glibc functions.
We can print to the terminal now! The integration tests can test this
now.
Change-Id: I70af4546b417b888ad9fbb18798db240f77f4e71
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2614
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Get achilles building in Nix as part of the depot's build tree. This
involved making it work with stable rust, since the depot only exposes
stable rust to sub-packages, which turned out to be fairly
straightforward.
Also adds libffi as a new top-level expose, since it's required to build achilles
Change-Id: I5f6dedb26c0b81ec258aedde1973e74903c07ece
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2612
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI