[Git][ghc/ghc][wip/torsten.schmits/0475-tuple-syntax-2] Introduce ListTuplePuns extension

[Ben Gamari (@bgamari)]

Ben Gamari pushed to branch wip/torsten.schmits/0475-tuple-syntax-2 at Glasgow Haskell Compiler / GHC


Commits:
46495255 by Torsten Schmits at 2024-02-29T11:50:35-05:00
Introduce ListTuplePuns extension

This implements Proposal 0475, introducing the `ListTuplePuns` extension
which is enabled by default.

Disabling this extension makes it invalid to refer to list, tuple and
sum type constructors by using built-in syntax like `[Int]`,
`(Int, Int)`, `(# Int#, Int# #)` or `(# Int | Int #)`.
Instead, this syntax exclusively denotes data constructors for use with
`DataKinds`.
The conventional way of referring to these data constructors by
prefixing them with a single quote (`'(Int, Int)`) is now a parser
error.

Tuple declarations have been moved to `GHC.Tuple.Prim` and the `Solo`
data constructor has been renamed to `MkSolo` (in a previous commit).
Unboxed tuples and sums now have real source declarations in `GHC.Types`.
Unit and solo types for tuples are now called `Unit`, `Unit#`, `Solo`
and `Solo#`.
Constraint tuples now have the unambiguous type constructors `CTuple<n>`
as well as `CUnit` and `CSolo`, defined in `GHC.Classes` like before.

A new parser construct has been added for the unboxed sum data
constructor declarations.

The type families `Tuple`, `Sum#` etc. that were intended to provide
nicer syntax have been omitted from this change set due to inference
problems, to be implemented at a later time.
See the MR discussion for more info.

Updates the submodule utils/haddock.
Updates the cabal submodule due to new language extension.

    Metric Increase:
        haddock.base

    Metric Decrease:
        MultiLayerModulesTH_OneShot
        size_hello_artifact

Proposal document: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0475-tuple-syntax.rst

Merge request: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/8820

Tracking ticket: https://gitlab.haskell.org/ghc/ghc/-/issues/21294

- - - - -


30 changed files:

- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/Types.hs-boot
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/StgToJS/Linker/Linker.hs
- compiler/GHC/StgToJS/Linker/Utils.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Instance/Typeable.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Name.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Ppr.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Outputable.hs
- docs/users_guide/9.10.1-notes.rst
- docs/users_guide/exts/data_kinds.rst
- libraries/Cabal


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/464952551cc322a3a65c4b46d5cc7904dd23e2d0

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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/464952551cc322a3a65c4b46d5cc7904dd23e2d0
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