gcc-7.3.0HEADgcc-7.3.0master

1 files changed, 34 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/ext/varargs1.C b/gcc/testsuite/g++.dg/ext/varargs1.C
new file mode 100644
index 0000000000..b67d788e1b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/varargs1.C
@@ -0,0 +1,34 @@
+// Test that passing an object with non-trivial copy constructor and
+// destructor is (conditionally) supported and has sensible semantics.
+
+#include <stdarg.h>
+extern "C" void abort();
+
+void *as[5];
+int i;
+
+struct A {
+  A() { as[i++] = this; }
+  A(const A& a) {
+    if (&a != as[i-1])
+      abort();
+    as[i++] = this;
+  }
+  ~A() {
+    if (this != as[--i])
+      abort();
+  }
+};
+
+void f(int i, ...) {
+  va_list ap;
+  va_start (ap, i);
+  A ar = va_arg (ap, A);
+}
+
+int main()
+{
+  f(42,A());
+  if (i != 0)
+    abort();
+}