1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/anon-struct2.C b/gcc/testsuite/g++.dg/ext/anon-struct2.C
new file mode 100644
index 000000000..0c629ed48
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/anon-struct2.C
@@ -0,0 +1,46 @@
+/* { dg-options "" } */
+/* In GNU C++ mode, we recognize the anonymous struct extension,
+   but not Microsoft C extensions.  */
+
+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];
+
+/* GNU extension.  */
+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];
+
+/* Test that __extension__ does the right thing coming _from_ GNU C mode.  */
+__extension__ struct G {
+  struct { char z; };
+  char g;
+};
+char testG[sizeof(G) == 2 * sizeof(A) ? 1 : -1];
+
+struct H {
+  struct { char z; };
+  char h;
+};
+char testH[sizeof(H) == 2 * sizeof(A) ? 1 : -1];