[clang] [Clang] Added clang diagnostic when snprintf/vsnprintf uses sizeof(de… (PR #170637)

[via cfe-commits]

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@@ -1140,6 +1139,37 @@ static bool ProcessFormatStringLiteral(const Expr *FormatExpr,
   return false;
 }
 
+static const UnaryExprOrTypeTraitExpr *getAsSizeOfExpr(const Expr *E) {
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BgZun wrote:

In my newest commit I moved the diagnostics from CheckMemaccessArguments to its own function. Then used it here

https://github.com/llvm/llvm-project/pull/170637