[clang] [-Wunterminated-string-initialization] Handle C string literals ending with explicit '\0' (PR #143487)

[Eli Friedman via cfe-commits]

================
@@ -260,6 +260,12 @@ static void CheckStringInit(Expr *Str, QualType &DeclT, 
const ArrayType *AT,
              diag::ext_initializer_string_for_char_array_too_long)
           << Str->getSourceRange();
     else if (StrLength - 1 == ArrayLen) {
+      // If the string literal is null-terminated explicitly, e.g., `char a[4] 
=
+      // "ABC\0"`, there should be no warning:
+      if (const auto *SL = dyn_cast<StringLiteral>(Str->IgnoreParens());
+          SL && SL->getLength() > 0 &&
+          SL->getCodeUnit(SL->getLength() - 1) == 0)
+        return;
----------------
efriedma-quic wrote:

I think the early return suppresses 
warn_initializer_string_for_char_array_too_long_for_cpp warnings?

https://github.com/llvm/llvm-project/pull/143487
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits