[clang] [Clang] [Sema] Allow non-local/non-variable declarations in for loop (PR #129737)

[Shafik Yaghmour via cfe-commits]

================
@@ -2269,10 +2269,11 @@ StmtResult Sema::ActOnForStmt(SourceLocation ForLoc, 
SourceLocation LParenLoc,
       for (auto *DI : DS->decls()) {
         if (VarDecl *VD = dyn_cast<VarDecl>(DI)) {
           VarDeclSeen = true;
-          if (VD->isLocalVarDecl() && !VD->hasLocalStorage()) {
-            Diag(DI->getLocation(), diag::err_non_local_variable_decl_in_for);
-            DI->setInvalidDecl();
-          }
+          if (VD->isLocalVarDecl() && !VD->hasLocalStorage())
----------------
shafik wrote:

I am a big fan of quoting the section of the standard that allows various 
features. This allows folks in the future to know where to look to better 
understand the code.

https://github.com/llvm/llvm-project/pull/129737
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