[Git][ghc/ghc][wip/sand-witch/modern-STV-extension-shuffling] Extension shuffling (#23291)

[Andrei Borzenkov (@sand-witch)]

Andrei Borzenkov pushed to branch wip/sand-witch/modern-STV-extension-shuffling at Glasgow Haskell Compiler / GHC


Commits:
899e625f by Andrei Borzenkov at 2023-06-05T21:08:33+04:00
Extension shuffling (#23291)

Where introduced 3 new extensions:
  - PatternSignatures
  - ExtendedForAllScope
  - MethodTypeVariables

Tasks of ScopedTypeVariables extension were distributed between
PatternSignatures, ExtendedForAllScope and MethodTypeVariables according
to the proposal. Now ScopedTypeVaribles only implies these three exntesions.

Was introduced one new warning option: -Wpattern-signature-binds
It warns when pattern signature binds into scope new type variable. For
example:

  f (a :: t) = ...

- - - - -


30 changed files:

- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Types/Error/Codes.hs
- docs/users_guide/9.8.1-notes.rst
- docs/users_guide/expected-undocumented-flags.txt
- docs/users_guide/exts/explicit_forall.rst
- docs/users_guide/exts/gadt.rst
- docs/users_guide/exts/scoped_type_variables.rst
- docs/users_guide/exts/type_abstractions.rst
- docs/users_guide/using-warnings.rst
- libraries/ghc-boot-th/GHC/LanguageExtensions/Type.hs
- testsuite/tests/driver/T4437.hs
- testsuite/tests/rename/should_fail/T11663.stderr
- + testsuite/tests/rename/should_fail/WPatternSigBinds.hs
- + testsuite/tests/rename/should_fail/WPatternSigBinds.stderr
- testsuite/tests/rename/should_fail/all.T
- testsuite/tests/showIface/DocsInHiFile1.stdout
- testsuite/tests/showIface/DocsInHiFileTH.stdout
- testsuite/tests/showIface/HaddockIssue849.stdout
- testsuite/tests/showIface/HaddockOpts.stdout


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/899e625ffbbb9d3bf62887f2d707f68eb3dd2b0d

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/899e625ffbbb9d3bf62887f2d707f68eb3dd2b0d
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