1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/case-range2.C b/gcc/testsuite/g++.dg/ext/case-range2.C
new file mode 100644
index 000000000..de1f2a7e7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/case-range2.C
@@ -0,0 +1,27 @@
+// { dg-do compile }
+// Tests if case ranges (a GNU extension) correctly emit messages
+// about overlapping ranges.
+// { dg-options "" }
+
+const int low = -2;
+const int high = 15;
+
+template <typename T>
+T f2 (T i)
+{
+  switch (i)
+  {
+    case low ... high : return i + 1;  // { dg-error "previously" }
+    case 5 : return i + 2;             // { dg-error "duplicate" }
+    default : return 0;
+  }
+}
+
+int f (int i)
+{
+  switch (i) {
+    case 1 ... 10: return i + 1;       // { dg-error "first entry" }
+    case 3 ... 5 : return i + 3;       // { dg-error "duplicate" }
+    default: return f2 (i);            // { dg-message "instantiated" }
+  }
+}