Fix a couple of bugs, add some new cool stuff.

1. Fix a todo in Parser::ParseTag, to recover better.  On code like
   that in test/Sema/decl-invalid.c it causes us to return a single
   error instead of multiple.
2. Fix an error in Sema::ParseDeclarator, where it would crash if the
   declarator didn't have an identifier.  Instead, diagnose the problem.
3. Start adding infrastructure to track the range of locations covered
   by a declspec or declarator.  This is mostly implemented for declspec,
   but could be improved, it is missing for declarator.

Thanks to Neil for pointing out this crash.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40482 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/cxx-casting.cpp b/test/Parser/cxx-casting.cpp
new file mode 100644
index 0000000..1e06e98
--- /dev/null
+++ b/test/Parser/cxx-casting.cpp
@@ -0,0 +1,31 @@
+// RUN: clang -fsyntax-only %s
+
+char *const_cast_test(const char *var)
+{
+  return const_cast<char*>(var);
+}
+
+#if 0
+// FIXME: Uncomment when C++ is supported more.
+struct A {
+  virtual ~A() {}
+};
+
+struct B : public A {
+};
+
+struct B *dynamic_cast_test(struct A *a)
+{
+  return dynamic_cast<struct B*>(a);
+}
+#endif
+
+char *reinterpret_cast_test()
+{
+  return reinterpret_cast<char*>(0xdeadbeef);
+}
+
+double static_cast_test(int i)
+{
+  return static_cast<double>(i);
+}