Allow a using directive to refer to the implicitly-defined namespace

"std", with a warning, to improve GCC compatibility. Fixes PR7517.

As a drive-by, add typo correction for using directives.

llvm-svn: 107172

1 files changed, 6 insertions, 1 deletions

diff --git a/clang/test/FixIt/typo.cpp b/clang/test/FixIt/typo.cpp
index 5b9e68bbfd3..9789a5807a6 100644
--- a/clang/test/FixIt/typo.cpp
+++ b/clang/test/FixIt/typo.cpp
@@ -12,7 +12,8 @@ namespace std {
   typedef basic_string<char> string; // expected-note 2{{'string' declared here}}
 }
 
-namespace otherstd { // expected-note 2{{'otherstd' declared here}}
+namespace otherstd { // expected-note 2{{'otherstd' declared here}} \
+                     // expected-note{{namespace 'otherstd' defined here}}
   using namespace std;
 }
 
@@ -29,6 +30,10 @@ float area(float radius, // expected-note{{'radius' declared here}}
   return radious * pi; // expected-error{{did you mean 'radius'?}}
 }
 
+using namespace othestd; // expected-error{{no namespace named 'othestd'; did you mean 'otherstd'?}}
+namespace blargh = otherstd; // expected-note{{namespace 'blargh' defined here}}
+using namespace ::blarg; // expected-error{{no namespace named 'blarg' in the global namespace; did you mean 'blargh'?}}
+
 bool test_string(std::string s) {
   basc_string<char> b1; // expected-error{{no template named 'basc_string'; did you mean 'basic_string'?}}
   std::basic_sting<char> b2; // expected-error{{no template named 'basic_sting' in namespace 'std'; did you mean 'basic_string'?}}