Sema for Captured Statements

Add CapturedDecl to be the DeclContext for CapturedStmt, and perform semantic
analysis. Currently captures all variables by reference.

TODO: templates

Author: Ben Langmuir <ben.langmuir@intel.com>

Differential Revision: http://llvm-reviews.chandlerc.com/D433

llvm-svn: 179618
diff --git a/clang/lib/AST/DeclBase.cpp b/clang/lib/AST/DeclBase.cpp
index 3f23f3d..402d836 100644
--- a/clang/lib/AST/DeclBase.cpp
+++ b/clang/lib/AST/DeclBase.cpp
@@ -553,6 +553,7 @@
     case StaticAssert:
     case ObjCPropertyImpl:
     case Block:
+    case Captured:
     case TranslationUnit:
 
     case UsingDirective:
@@ -839,6 +840,7 @@
   case Decl::TranslationUnit:
   case Decl::LinkageSpec:
   case Decl::Block:
+  case Decl::Captured:
     // There is only one DeclContext for these entities.
     return this;