[flang] [llvm] [libcxx] [libcxxabi] [compiler-rt] [lldb] [libunwind] [mlir] [clang-tools-extra] [lld] [libc] [openmp] [clang] [C23] Implement N3018: The constexpr specifier for object definitions (PR #73099)

[Mariya Podchishchaeva via cfe-commits]

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@@ -1914,6 +1914,17 @@ class StringLiteral final
     llvm_unreachable("Unsupported character width!");
   }
 
+  // Get code unit but preserve sign info.
+  int64_t getCodeUnitS(size_t I, uint64_t ByteWidth) const {
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Fznamznon wrote:

It is a number of bits in byte, but ok

https://github.com/llvm/llvm-project/pull/73099