Add a limit to the length of a sequence of 'operator->' functions we will
follow when building a class member access expression. Based on a patch by
Rahul Jain!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194161 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/operator-arrow-depth.cpp b/test/SemaCXX/operator-arrow-depth.cpp
new file mode 100644
index 0000000..4e09882
--- /dev/null
+++ b/test/SemaCXX/operator-arrow-depth.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -DMAX=128 -foperator-arrow-depth 128
+// RUN: %clang_cc1 -fsyntax-only -verify %s -DMAX=2 -foperator-arrow-depth 2
+// RUN: %clang -fsyntax-only -Xclang -verify %s -DMAX=10 -foperator-arrow-depth=10
+
+template<int N> struct B;
+template<int N> struct A {
+ B<N> operator->(); // expected-note +{{'operator->' declared here produces an object of type 'B<}}
+};
+template<int N> struct B {
+ A<N-1> operator->(); // expected-note +{{'operator->' declared here produces an object of type 'A<}}
+#if MAX != 2
+ // expected-note-re@-2 {{(skipping (120|2) 'operator->'s in backtrace)}}
+#endif
+};
+
+struct X { int n; };
+template<> struct B<1> {
+ X *operator->();
+};
+
+A<MAX/2> good;
+int n = good->n;
+
+B<MAX/2 + 1> bad;
+int m = bad->n; // expected-error-re {{use of 'operator->' on type 'B<(1|5|64)>' would invoke a sequence of more than (2|10|128) 'operator->' calls}}
+ // expected-note@-1 {{use -foperator-arrow-depth=N to increase 'operator->' limit}}