Handle VarTemplateDecl 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: 290886

clang/lib/Frontend/ASTConsumers.cpp

@@ -522,6 +522,10 @@ void DeclContextPrinter::PrintDeclContext(const DeclContext* DC,
       Out << "<access specifier>\n";
       break;
     }
+    case Decl::VarTemplate: {
+      Out << "<var template> " << *cast<VarTemplateDecl>(I) << "\n";
+      break;
+    }
     default:
       Out << "DeclKind: " << DK << '"' << I << "\"\n";
       llvm_unreachable("decl unhandled");

clang/test/Coverage/ast-printing.cpp

@@ -1,9 +1,9 @@
-// RUN: %clang_cc1 -fsyntax-only %s
-// RUN: %clang_cc1 -ast-print %s -o %t.1.cpp
-// RUN: %clang_cc1 -ast-print %t.1.cpp -o %t.2.cpp
+// RUN: %clang_cc1 -std=c++14 -fsyntax-only %s
+// RUN: %clang_cc1 -std=c++14 -ast-print %s -o %t.1.cpp
+// RUN: %clang_cc1 -std=c++14 -ast-print %t.1.cpp -o %t.2.cpp
 // RUN: diff %t.1.cpp %t.2.cpp
-// RUN: %clang_cc1 -ast-dump %s
-// RUN: %clang_cc1 -print-decl-contexts %s
-// RUN: %clang_cc1 -fdump-record-layouts %s
+// RUN: %clang_cc1 -std=c++14 -ast-dump %s
+// RUN: %clang_cc1 -std=c++14 -print-decl-contexts %s
+// RUN: %clang_cc1 -std=c++14 -fdump-record-layouts %s
 
 #include "cxx-language-features.inc"

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

@@ -60,3 +60,6 @@ struct ClassTemplatePartialSpecialization<T, true> { };
 struct AccessSpec {
 private:
 };
+
+// Variable template
+template <typename T> T varTemplate = 0;