================
@@ -0,0 +1,117 @@
+// RUN: %clang_cc1 -verify=expected,c2y -pedantic -std=c2y %s
+// RUN: %clang_cc1 -verify=expected,c2y,compat -Wpre-c2y-compat -std=c2y %s
+// RUN: %clang_cc1 -verify=expected,ext -pedantic -std=c23 %s
+// RUN: %clang_cc1 -verify=expected,cpp -pedantic -x c++ -Wno-c11-extensions %s
+
+
+/* WG14 N3353: Clang 21
+ * Obsolete implicitly octal literals and add delimited escape sequences
+ */
+
+constexpr int i = 0234; // c2y-warning {{octal literals without a '0o' prefix
are deprecated}}
----------------
AaronBallman wrote:
Each of those cases is as an expression, and we have coverage for expressions
already (e.g., `0O1234 == 0o1234`), so I'm not certain what other test coverage
we'd get from that.
https://github.com/llvm/llvm-project/pull/131626
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