[PATCH] D123064: [Clang][C++23][WIP] P2071 Named universal character escapes

[Corentin Jabot via Phabricator via cfe-commits]

cor3ntin created this revision.
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! Missing tests, some cleanup still needed.

- Add a function in LLVM to map a name to a codepoint.

This using a try to minimize memory usage,
while allowing fast access.

- Add an utility to regenerate this data.

- Support named escape sequences with an extension warning.

I have not yet dealt with C++23 conformance extension warning,


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123064

Files:
  clang/include/clang/Basic/DiagnosticLexKinds.td
  clang/include/clang/Lex/Lexer.h
  clang/lib/Lex/Lexer.cpp
  clang/lib/Lex/LiteralSupport.cpp
  llvm/CMakeLists.txt
  llvm/include/llvm/Support/Unicode.h
  llvm/lib/Support/CMakeLists.txt
  llvm/lib/Support/UnicodeNameToCodepoint.cpp
  llvm/lib/Support/UnicodeNameToCodepointGenerated.cpp
  llvm/utils/UnicodeData/CMakeLists.txt
  llvm/utils/UnicodeData/UnicodeNameMappingGenerator.cpp