1 files changed, 50 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/anon-struct1.C b/gcc/testsuite/g++.dg/ext/anon-struct1.C
new file mode 100644
index 000000000..0a682db1a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/anon-struct1.C
@@ -0,0 +1,50 @@
+/* { dg-options "-ansi -pedantic -pedantic-errors" } */
+/* In strict ISO C++ mode, we don't recognize the anonymous struct
+   extension or any 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; };		/* { dg-error "prohibits anonymous structs" } */
+  char e;
+};
+
+typedef struct A typedef_A;
+struct F {
+  typedef_A;			/* { dg-error "does not declare anything" } */
+  char f;
+};
+char testF[sizeof(struct F) == sizeof(struct A) ? 1 : -1];
+
+/* __extension__ enables GNU C mode for the duration of the declaration.  */
+__extension__ struct G {
+  struct { char z; };
+  char g;
+};
+char testG[sizeof(G) == 2 * sizeof(A) ? 1 : -1];
+
+struct H {
+  __extension__ struct { char z; };
+  char h;
+};
+char testH[sizeof(H) == 2 * sizeof(A) ? 1 : -1];
+
+/* Make sure __extension__ gets turned back off.  */
+struct I {
+  struct { char z; };		/* { dg-error "prohibits anonymous structs" } */
+  char i;
+};