Wolfgang Jeltsch pushed to branch wip/jeltsch/text-read-uncovering at Glasgow Haskell Compiler / GHC

Commits:

• 3dd63940
  by Wolfgang Jeltsch at 2026-04-14T21:46:15+03:00

  Move most of the `System.IO` implementation into `base`
  
  This involves a rewrite of the `combine` helper function to avoid the
  use of `last`, which would now be flagged as an error.
  
  Metric Increase:
      T12227
      T12707
      T5642
  

• 4ed43e99
  by Wolfgang Jeltsch at 2026-04-14T21:48:05+03:00

  Move I/O-related `Read` instances into `base`
  

• 84233dca
  by Wolfgang Jeltsch at 2026-04-14T21:48:05+03:00

  Move most of the `Numeric` implementation into `base`
  
  The `showHex` operation and the `showIntAtBase` operation, which
  underlies it, are kept in `GHC.Internal.Numeric`, because `showHex` is
  used in a few places in `ghc-internal`; everything else is moved.
  

• 24e9548f
  by Wolfgang Jeltsch at 2026-04-14T21:48:05+03:00

  Move the instance `Read ByteOrder` into `base`
  

• 6e53f172
  by Wolfgang Jeltsch at 2026-04-14T21:48:05+03:00

  Move the implementation of version parsing into `base`
  

• 4439aad0
  by Wolfgang Jeltsch at 2026-04-14T21:48:05+03:00

  Move the implementation of `readConstr` into `base`
  

42 changed files:

• libraries/base/src/Control/Concurrent.hs
• libraries/base/src/Data/Data.hs
• libraries/base/src/Data/Version.hs
• libraries/base/src/GHC/ByteOrder.hs
• libraries/base/src/GHC/IO/Handle.hs
• libraries/base/src/Numeric.hs
• libraries/base/src/Prelude.hs
• libraries/base/src/System/IO.hs
• libraries/base/src/Text/Printf.hs
• libraries/ghc-internal/src/GHC/Internal/Data/Data.hs
• libraries/ghc-internal/src/GHC/Internal/Data/Version.hs
• libraries/ghc-internal/src/GHC/Internal/IO/Device.hs
• libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs
• libraries/ghc-internal/src/GHC/Internal/IO/IOMode.hs
• libraries/ghc-internal/src/GHC/Internal/Numeric.hs
• libraries/ghc-internal/src/GHC/Internal/Read.hs
• libraries/ghc-internal/src/GHC/Internal/System/IO.hs
• testsuite/tests/interface-stability/base-exports.stdout
• testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
• testsuite/tests/interface-stability/base-exports.stdout-mingw32
• testsuite/tests/interface-stability/base-exports.stdout-ws-32
• testsuite/tests/plugins/plugins09.stdout
• testsuite/tests/plugins/plugins10.stdout
• testsuite/tests/plugins/plugins11.stdout
• testsuite/tests/plugins/static-plugins.stdout
• testsuite/tests/typecheck/should_compile/T9497a.stderr
• testsuite/tests/typecheck/should_compile/holes.stderr
• testsuite/tests/typecheck/should_compile/holes3.stderr
• testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
• testsuite/tests/typecheck/should_fail/T9497d.stderr
• testsuite/tests/typecheck/should_run/T9497a-run.stderr
• testsuite/tests/typecheck/should_run/T9497b-run.stderr
• testsuite/tests/typecheck/should_run/T9497c-run.stderr
• utils/haddock/html-test/ref/Bug1004.html
• utils/haddock/html-test/ref/Bug973.html
• utils/haddock/html-test/ref/ConstructorPatternExport.html
• utils/haddock/html-test/ref/DefaultSignatures.html
• utils/haddock/html-test/ref/Hash.html
• utils/haddock/html-test/ref/PatternSyns.html
• utils/haddock/html-test/ref/PatternSyns2.html
• utils/haddock/html-test/ref/QuasiExpr.html
• utils/haddock/html-test/ref/Test.html

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