1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/anon-struct3.C b/gcc/testsuite/g++.dg/ext/anon-struct3.C
new file mode 100644
index 000000000..1460d6c12
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/anon-struct3.C
@@ -0,0 +1,34 @@
+/* { dg-options "-fms-extensions" } */
+/* Verify that enabling Microsoft mode doesn't twist C++ as much as
+   their corresponding C extensions.  Checked vs
+   Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8168 for 80x86
+ */
+
+struct A { char a; };
+
+struct B {
+  struct A;			/* forward decl of B::A.  */
+  char b;
+};
+char testB[sizeof(B) == sizeof(A) ? 1 : -1];
+
+struct C {
+  struct D { char d; };		/* decl of C::D.  */
+  char c;
+};
+char testC[sizeof(C) == sizeof(A) ? 1 : -1];
+char testD[sizeof(C::D) == sizeof(A) ? 1 : -1];
+
+struct E {
+  struct { char z; };
+  char e;
+};
+char testE[sizeof(E) == 2 * sizeof(A) ? 1 : -1];
+char testEz[sizeof( ((E *)0)->z )];
+
+typedef struct A typedef_A;
+struct F {
+  typedef_A;			/* { dg-error "does not declare anything" } */
+  char f;
+};
+char testF[sizeof(F) == sizeof(A) ? 1 : -1];