[clang] Perf/lexer faster slow get char and size (PR #70543)

[via cfe-commits]

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@@ -2012,15 +2020,15 @@ bool Lexer::LexNumericConstant(Token &Result, const 
char *CurPtr) {
 
   // If we have a digit separator, continue.
   if (C == '\'' && (LangOpts.CPlusPlus14 || LangOpts.C23)) {
-    unsigned NextSize;
-    char Next = getCharAndSizeNoWarn(CurPtr + Size, NextSize, LangOpts);
+    auto NextCharAndSize = getCharAndSizeNoWarn(CurPtr + Size, LangOpts);
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cor3ntin wrote:

Structured binding here?

https://github.com/llvm/llvm-project/pull/70543
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