Introduce a new code-completion point when we're parsing a
declarator. Here, we can only see a few things (e.g., cvr-qualifiers,
nested name specifiers) and we do not want to provide other non-macro
completions. Previously, we would end up in recovery mode and would
provide a large number of non-relevant completions.

llvm-svn: 111818
diff --git a/clang/test/Index/complete-declarators.cpp b/clang/test/Index/complete-declarators.cpp
new file mode 100644
index 0000000..ba16e22
--- /dev/null
+++ b/clang/test/Index/complete-declarators.cpp
@@ -0,0 +1,39 @@
+// This test is line- and column-sensitive, so test commands are at the bottom.
+namespace N {
+  struct X {
+    int f(X);
+  };
+}
+
+int g(int a);
+
+struct Y { };
+
+struct Z {
+  int member;
+  friend int N::X::f(N::X);
+};
+
+// RUN: c-index-test -code-completion-at=%s:8:5 %s | FileCheck -check-prefix=CHECK-CC1 %s
+// CHECK-CC1: NotImplemented:{TypedText const} (30)
+// CHECK-CC1: NotImplemented:{TypedText N}{Text ::} (75)
+// CHECK-CC1: NotImplemented:{TypedText operator} (30)
+// CHECK-CC1: NotImplemented:{TypedText volatile} (30)
+// RUN: c-index-test -code-completion-at=%s:8:11 %s | FileCheck -check-prefix=CHECK-CC2 %s
+// CHECK-CC2: NotImplemented:{TypedText const} (30)
+// CHECK-CC2-NOT: NotImplemented:{TypedText N}{Text ::} (75)
+// CHECK-CC2-NOT: NotImplemented:{TypedText operator} (30)
+// CHECK-CC2: NotImplemented:{TypedText volatile} (30)
+// RUN: c-index-test -code-completion-at=%s:13:7 %s | FileCheck -check-prefix=CHECK-CC3 %s
+// CHECK-CC3: NotImplemented:{TypedText const} (30)
+// CHECK-CC3-NOT: NotImplemented:{TypedText N}{Text ::} (75)
+// CHECK-CC3: NotImplemented:{TypedText operator} (30)
+// CHECK-CC3: NotImplemented:{TypedText volatile} (30)
+// RUN: c-index-test -code-completion-at=%s:14:14 %s | FileCheck -check-prefix=CHECK-CC4 %s
+// CHECK-CC4: NotImplemented:{TypedText const} (30)
+// CHECK-CC4: NotImplemented:{TypedText N}{Text ::} (75)
+// CHECK-CC4: NotImplemented:{TypedText operator} (30)
+// CHECK-CC4: NotImplemented:{TypedText volatile} (30)
+// CHECK-CC4: StructDecl:{TypedText Y} (40)
+// CHECK-CC4: StructDecl:{TypedText Z} (20)
+