Jupyter namespace error

[master308]

When using Jupyter with cling error occurs when using namespace std; is omitted. Following example works when cling is run from terminal, but not in Jupyter:

#include<iostream>
std::cout<<"Hallo world!!"<<endl;

corresponding error in Jupyter is:

In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:38:
In file included from /usr/include/c++/5/iosfwd:39:
In file included from /usr/include/c++/5/bits/stringfwd.h:40:
/usr/include/c++/5/bits/memoryfwd.h:51:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:38:
In file included from /usr/include/c++/5/iosfwd:39:
/usr/include/c++/5/bits/stringfwd.h:43:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:38:
In file included from /usr/include/c++/5/iosfwd:40:
In file included from /usr/include/c++/5/bits/postypes.h:40:
In file included from /usr/include/c++/5/cwchar:44:
/usr/include/wchar.h:132:1: error: expected unqualified-id
__BEGIN_DECLS
^
/usr/include/x86_64-linux-gnu/sys/cdefs.h:98:31: note: expanded from macro '__BEGIN_DECLS'
# define __BEGIN_DECLS  extern "C" {
                               ^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:38:
In file included from /usr/include/c++/5/iosfwd:40:
In file included from /usr/include/c++/5/bits/postypes.h:40:
/usr/include/c++/5/cwchar:63:1: error: namespaces can only be defined in global or namespace scope
{
^
/usr/include/c++/5/cwchar:136:1: error: namespaces can only be defined in global or namespace scope
{
^
/usr/include/c++/5/cwchar:242:1: error: namespaces can only be defined in global or namespace scope
{
^
/usr/include/c++/5/cwchar:263:1: error: namespaces can only be defined in global or namespace scope
{
^
/usr/include/c++/5/cwchar:278:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:38:
In file included from /usr/include/c++/5/iosfwd:40:
/usr/include/c++/5/bits/postypes.h:69:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:38:
/usr/include/c++/5/iosfwd:43:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:60:
/usr/include/c++/5/bits/functexcept.h:43:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:61:
/usr/include/c++/5/bits/cpp_type_traits.h:69:1: error: namespaces can only be defined in global or namespace scope
{
^
/usr/include/c++/5/bits/cpp_type_traits.h:79:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:62:
/usr/include/c++/5/ext/type_traits.h:38:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:63:
/usr/include/c++/5/ext/numeric_traits.h:38:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:64:
In file included from /usr/include/c++/5/bits/stl_pair.h:59:
/usr/include/c++/5/bits/move.h:37:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:64:
In file included from /usr/include/c++/5/bits/stl_pair.h:59:
In file included from /usr/include/c++/5/bits/move.h:57:
/usr/include/c++/5/type_traits:43:1: error: namespaces can only be defined in global or namespace scope
{
^
/usr/include/c++/5/type_traits:53:1: error: namespaces can only be defined in global or namespace scope
{
^
In file included from input_line_3:2:
In file included from /usr/include/c++/5/iostream:39:
In file included from /usr/include/c++/5/ostream:38:
In file included from /usr/include/c++/5/ios:40:
In file included from /usr/include/c++/5/bits/char_traits.h:39:
In file included from /usr/include/c++/5/bits/stl_algobase.h:64:
In file included from /usr/include/c++/5/bits/stl_pair.h:59:
/usr/include/c++/5/bits/move.h:60:1: error: namespaces can only be defined in global or namespace scope
{
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]

​

[vgvassilev]

I believe this is a limitation on the Jupyter implementation. You probably need to separate this in two different cells.