Brandon Chinn pushed to branch wip/interpolated-strings at Glasgow Haskell Compiler / GHC

Commits:

• 6b902264
  by Brandon Chinn at 2026-09-10T16:10:56-07:00

  Reorganize processChars functions
  
  Move functions around, no code changes
  

• 02af96b6
  by Brandon Chinn at 2026-09-10T16:11:13-07:00

  Always use processCharsSingle to get StringLexError
  

• 96e73437
  by Brandon Chinn at 2026-09-10T16:11:19-07:00

  Add pprHsStringMulti, unify string ppr functions
  

• deef7392
  by Brandon Chinn at 2026-09-10T16:11:22-07:00

  Break out Language.Haskell.Syntax.StringMeta
  

• efa32059
  by Brandon Chinn at 2026-09-10T16:12:07-07:00

  Implement interpolated strings (#27592)
  

80 changed files:

• + changelog.d/string-interpolation
• compiler/GHC/Builtin/KnownOccs.hs
• compiler/GHC/Driver/Flags.hs
• compiler/GHC/Hs/Expr.hs
• compiler/GHC/Hs/Instances.hs
• compiler/GHC/Hs/Lit.hs
• compiler/GHC/Hs/Syn/Type.hs
• compiler/GHC/HsToCore/Expr.hs
• compiler/GHC/HsToCore/Quote.hs
• compiler/GHC/HsToCore/Ticks.hs
• compiler/GHC/Iface/Ext/Ast.hs
• compiler/GHC/Parser.y
• compiler/GHC/Parser/Lexer.x
• compiler/GHC/Parser/Lexer/String.x
• compiler/GHC/Parser/String.hs
• compiler/GHC/Rename/Expr.hs
• + compiler/GHC/Rename/String.hs
• compiler/GHC/Tc/Gen/Expr.hs
• compiler/GHC/Tc/Types/Origin.hs
• compiler/GHC/Tc/Zonk/Type.hs
• compiler/GHC/ThToHs.hs
• compiler/GHC/Utils/Outputable.hs
• compiler/Language/Haskell/Syntax/Expr.hs
• compiler/Language/Haskell/Syntax/Extension.hs
• + compiler/Language/Haskell/Syntax/StringMeta.hs
• compiler/ghc.cabal.in
• docs/users_guide/exts/qualified_strings.rst
• + docs/users_guide/exts/string_interpolation.rst
• libraries/base/src/GHC/Essentials.hs
• libraries/ghc-experimental/ghc-experimental.cabal.in
• + libraries/ghc-experimental/src/Data/String/Experimental.hs
• + libraries/ghc-experimental/src/Data/String/Interpolate/Builder/Experimental.hs
• + libraries/ghc-experimental/src/Data/String/Interpolate/Class/Experimental.hs
• + libraries/ghc-experimental/src/Data/String/Interpolate/Default/Experimental.hs
• + libraries/ghc-experimental/src/Data/String/Interpolate/ShowS/Experimental.hs
• libraries/ghc-internal/ghc-internal.cabal.in
• + libraries/ghc-internal/src/GHC/Internal/Data/String/Interpolate.hs
• libraries/ghc-internal/src/GHC/Internal/LanguageExtensions.hs
• libraries/ghc-internal/src/GHC/Internal/TH/Lib.hs
• testsuite/tests/count-deps/CountDepsAst.stdout
• testsuite/tests/count-deps/CountDepsParser.stdout
• testsuite/tests/driver/T4437.hs
• testsuite/tests/interface-stability/ghc-experimental-exports.stdout
• testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
• testsuite/tests/interface-stability/template-haskell-exports.stdout
• + testsuite/tests/parser/should_fail/MultilineStringsEscapeOverflow.hs
• + testsuite/tests/parser/should_fail/MultilineStringsEscapeOverflow.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationEscapeOverflow.hs
• + testsuite/tests/parser/should_fail/StringInterpolationEscapeOverflow.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationExtraOpen.hs
• + testsuite/tests/parser/should_fail/StringInterpolationExtraOpen.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationInPat.hs
• + testsuite/tests/parser/should_fail/StringInterpolationInPat.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationInType.hs
• + testsuite/tests/parser/should_fail/StringInterpolationInType.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationIncompleteExpr.hs
• + testsuite/tests/parser/should_fail/StringInterpolationIncompleteExpr.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationInvalidExpr.hs
• + testsuite/tests/parser/should_fail/StringInterpolationInvalidExpr.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationLineComment.hs
• + testsuite/tests/parser/should_fail/StringInterpolationLineComment.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationNoDelimClose.hs
• + testsuite/tests/parser/should_fail/StringInterpolationNoDelimClose.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationNoExpr.hs
• + testsuite/tests/parser/should_fail/StringInterpolationNoExpr.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationNoExprClose.hs
• + testsuite/tests/parser/should_fail/StringInterpolationNoExprClose.stderr
• + testsuite/tests/parser/should_fail/StringInterpolationSmartQuotes.hs
• + testsuite/tests/parser/should_fail/StringInterpolationSmartQuotes.stderr
• testsuite/tests/parser/should_fail/all.T
• + testsuite/tests/parser/should_run/StringInterpolation.hs
• + testsuite/tests/parser/should_run/StringInterpolation.stdout
• + testsuite/tests/parser/should_run/StringInterpolationOverloaded.hs
• + testsuite/tests/parser/should_run/StringInterpolationOverloaded.stdout
• testsuite/tests/parser/should_run/all.T
• + testsuite/tests/qualified-strings/should_run/Example/SQL.hs
• testsuite/tests/qualified-strings/should_run/all.T
• + testsuite/tests/qualified-strings/should_run/qstrings_interpolation.hs
• + testsuite/tests/qualified-strings/should_run/qstrings_interpolation.stdout
• utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs

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