Offer typo suggestions for 'using' declarations.

Patch courtesy of Luke Zarko <zarko@google.com>

llvm-svn: 186019
diff --git a/clang/test/FixIt/typo-using.cpp b/clang/test/FixIt/typo-using.cpp
new file mode 100644
index 0000000..3644dea
--- /dev/null
+++ b/clang/test/FixIt/typo-using.cpp
@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// RUN: cp %s %t
+// RUN: not %clang_cc1 -fsyntax-only -fixit -x c++ %t
+// RUN: %clang_cc1 -fsyntax-only -pedantic -Werror -x c++ %t
+// RUN: grep using_suggestion_tyname_ty_dropped_specifier %t
+
+// These tests have been separated from typo.cpp to keep the maximum typo
+// correction counter from ticking over; this causes spurious failures.
+
+namespace using_suggestion_ty {
+namespace N { class AAA {}; } // expected-note {{'AAA' declared here}}
+using N::AAB; // expected-error {{no member named 'AAB' in namespace 'using_suggestion_ty::N'; did you mean 'AAA'?}}
+}
+
+namespace using_suggestion_tyname_ty {
+namespace N { class AAA {}; } // expected-note {{'AAA' declared here}}
+using typename N::AAB; // expected-error {{no member named 'AAB' in namespace 'using_suggestion_tyname_ty::N'; did you mean 'AAA'?}}
+}
+
+namespace using_suggestion_val {
+namespace N { void FFF() {} } // expected-note {{'FFF' declared here}}
+using N::FFG; // expected-error {{no member named 'FFG' in namespace 'using_suggestion_val::N'; did you mean 'FFF'?}}
+}
+
+namespace using_suggestion_ty_dropped_specifier {
+class AAA {}; // expected-note {{'::using_suggestion_ty_dropped_specifier::AAA' declared here}}
+namespace N { }
+using N::AAA; // expected-error {{no member named 'AAA' in namespace 'using_suggestion_ty_dropped_specifier::N'; did you mean '::using_suggestion_ty_dropped_specifier::AAA'?}}
+}
+
+namespace using_suggestion_tyname_ty_dropped_specifier {
+class AAA {}; // expected-note {{'::using_suggestion_tyname_ty_dropped_specifier::AAA' declared here}}
+namespace N { }
+using typename N::AAA; // expected-error {{no member named 'AAA' in namespace 'using_suggestion_tyname_ty_dropped_specifier::N'; did you mean '::using_suggestion_tyname_ty_dropped_specifier::AAA'?}}
+}
+
+namespace using_suggestion_val_dropped_specifier {
+void FFF() {} // expected-note {{'::using_suggestion_val_dropped_specifier::FFF' declared here}}
+namespace N { }
+using N::FFF; // expected-error {{no member named 'FFF' in namespace 'using_suggestion_val_dropped_specifier::N'; did you mean '::using_suggestion_val_dropped_specifier::FFF'?}}
+}
+
+namespace using_suggestion_member_ty {
+class CCC { public: typedef int AAA; }; // expected-note {{'AAA' declared here}}
+class DDD : public CCC { public: using CCC::AAB; }; // expected-error {{no member named 'AAB' in 'using_suggestion_member_ty::CCC'; did you mean 'AAA'?}}
+}
+
+namespace using_suggestion_member_val {
+class CCC { public: void AAA() { } }; // expected-note {{'AAA' declared here}}
+class DDD : public CCC { public: using CCC::AAB; }; // expected-error {{no member named 'AAB' in 'using_suggestion_member_val::CCC'; did you mean 'AAA'?}}
+}
+
+namespace using_suggestion_member_tyname_ty {
+class CCC { public: typedef int AAA; }; // expected-note {{'AAA' declared here}}
+class DDD : public CCC { public: using typename CCC::AAB; }; // expected-error {{no member named 'AAB' in 'using_suggestion_member_tyname_ty::CCC'; did you mean 'AAA'?}}
+}