Add fixit hints for misplaced C++11 attributes around class specifiers.

Following r168626, in class declaration or definition, there are a combination of syntactic locations 
where C++11 attributes could appear, and among those the only valid location permitted by standard is
between class-key and class-name. So for those attributes appear at wrong locations, fixit is used to 
move them to expected location and we recover by applying them to the class specifier.
 

llvm-svn: 171757

1 files changed, 34 insertions, 0 deletions

diff --git a/clang/test/FixIt/fixit-cxx11-attributes.cpp b/clang/test/FixIt/fixit-cxx11-attributes.cpp
new file mode 100644
index 00000000000..7c8efcb8ec7
--- /dev/null
+++ b/clang/test/FixIt/fixit-cxx11-attributes.cpp
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -verify -std=c++11 %s
+// RUN: cp %s %t
+// RUN: not %clang_cc1 -x c++ -std=c++11 -fixit %t
+// RUN: %clang_cc1 -Wall -pedantic -x c++ -std=c++11 %t
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+
+namespace ClassSpecifier {
+  class [[]] [[]]
+    attr_after_class_name_decl [[]] [[]]; // expected-error {{an attribute list cannot appear here}}
+    // CHECK: fix-it:{{.*}}:{9:5-9:5}
+    // CHECK: fix-it:{{.*}}:{9:32-9:41}
+
+  class [[]] [[]]
+   attr_after_class_name_definition [[]] [[]] [[]]{}; // expected-error {{an attribute list cannot appear here}}
+   // CHECK: fix-it:{{.*}}:{14:4-14:4}
+   // CHECK: fix-it:{{.*}}:{14:37-14:51}
+
+  class base {};
+  class [[]] [[]] final_class 
+    alignas(float) [[]] final // expected-error {{an attribute list cannot appear here}}
+    alignas(float) [[]] [[]] alignas(float): base{}; // expected-error {{an attribute list cannot appear here}}
+    // CHECK: fix-it:{{.*}}:{19:19-19:19}
+    // CHECK: fix-it:{{.*}}:{20:5-20:25}
+    // CHECK: fix-it:{{.*}}:{19:19-19:19}
+    // CHECK: fix-it:{{.*}}:{21:5-21:44}
+
+  class [[]] [[]] final_class_another 
+    [[]] [[]] alignas(16) final // expected-error {{an attribute list cannot appear here}}
+    [[]] [[]] alignas(16) [[]]{}; // expected-error {{an attribute list cannot appear here}}
+    // CHECK: fix-it:{{.*}}:{27:19-27:19}
+    // CHECK: fix-it:{{.*}}:{28:5-28:27}
+    // CHECK: fix-it:{{.*}}:{27:19-27:19}
+    // CHECK: fix-it:{{.*}}:{29:5-29:31}
+}