Handle StaticAssertDecl in DeclContextPrinter

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290887

clang/lib/Frontend/ASTConsumers.cpp

@@ -526,6 +526,10 @@ void DeclContextPrinter::PrintDeclContext(const DeclContext* DC,
       Out << "<var template> " << *cast<VarTemplateDecl>(I) << "\n";
       break;
     }
+    case Decl::StaticAssert: {
+      Out << "<static assert>\n";
+      break;
+    }
     default:
       Out << "DeclKind: " << DK << '"' << I << "\"\n";
       llvm_unreachable("decl unhandled");

clang/test/Coverage/cxx-language-features.inc

@@ -63,3 +63,5 @@ private:
 
 // Variable template
 template <typename T> T varTemplate = 0;
+
+static_assert(true, "");