[ASTImporter] Added import of CXXStdInitializerListExpr

[a.sidorin]

Looks good, thank you!

cfe/trunk/lib/AST/ASTImporter.cpp

public:
     Expr *VisitExprWithCleanups(ExprWithCleanups *EWC);
     Expr *VisitCXXThisExpr(CXXThisExpr *E);
     Expr *VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E);
     Expr *VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E);
     Expr *VisitMemberExpr(MemberExpr *E);
     Expr *VisitCallExpr(CallExpr *E);
     Expr *VisitLambdaExpr(LambdaExpr *LE);
     Expr *VisitInitListExpr(InitListExpr *E);
+    Expr *VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E);
     Expr *VisitArrayInitLoopExpr(ArrayInitLoopExpr *E);
     Expr *VisitArrayInitIndexExpr(ArrayInitIndexExpr *E);
     Expr *VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E);
     Expr *VisitCXXNamedCastExpr(CXXNamedCastExpr *E);
     Expr *VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E);
     Expr *VisitTypeTraitExpr(TypeTraitExpr *E);
     Expr *VisitCXXTypeidExpr(CXXTypeidExpr *E);
 
Expr *ASTNodeImporter::VisitInitListExpr(InitListExpr *ILE) {
 
   To->sawArrayRangeDesignator(ILE->hadArrayRangeDesignator());
   To->setValueDependent(ILE->isValueDependent());
   To->setInstantiationDependent(ILE->isInstantiationDependent());
 
   return To;
 }
 
+Expr *ASTNodeImporter::VisitCXXStdInitializerListExpr(
+    CXXStdInitializerListExpr *E) {
+  QualType T = Importer.Import(E->getType());
+  if (T.isNull())
+    return nullptr;
+
+  Expr *SE = Importer.Import(E->getSubExpr());
+  if (!SE)
+    return nullptr;
+
+  return new (Importer.getToContext()) CXXStdInitializerListExpr(T, SE);
+}
+
 Expr *ASTNodeImporter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
   QualType ToType = Importer.Import(E->getType());
   if (ToType.isNull())
     return nullptr;
 
   Expr *ToCommon = Importer.Import(E->getCommonExpr());
   if (!ToCommon && E->getCommonExpr())
     return nullptr;

cfe/trunk/test/ASTMerge/std-initializer-list/Inputs/il.cpp

+namespace std {
+template <typename T>
+struct initializer_list {
+  const T *begin, *end;
+  initializer_list();
+};
+} // namespace std
+
+std::initializer_list<int> IL = {1, 2, 3, 4};

cfe/trunk/test/ASTMerge/std-initializer-list/test.cpp

+// RUN: %clang_cc1 -emit-pch -o %t.1.ast %S/Inputs/il.cpp
+// RUN: %clang_cc1 -ast-merge %t.1.ast -fsyntax-only %s 2>&1 | FileCheck --allow-empty %s
+// CHECK-NOT: unsupported AST node