The pre-increment/pre-decrement grammar in C++ differs from that in C,

but we were parsing the C grammar. Handle the C++ grammar
appropriately. Fixes PR7794.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110445 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/test/SemaCXX/increment-decrement.cpp b/test/SemaCXX/increment-decrement.cpp
new file mode 100644
index 0000000000..11b7d1e12f
--- /dev/null
+++ b/test/SemaCXX/increment-decrement.cpp
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+volatile int i;
+
+const int &inc = i++;
+const int &dec = i--;
+
+const int &incfail = ++i; // expected-error {{drops qualifiers}}
+const int &decfail = --i; // expected-error {{drops qualifiers}}
+
+// PR7794
+void f0(int e) {
+  ++(int&)e;
+}