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Without throwing cling cannot communicate to the caller that the code has failed,
as the user code is currently running when failing the dynamic expression evaluation.
Fixes gROOT->ProcessLine("doesNotExist", &res) not signalling any error through res.
Well, it still does not set res to an error - but at least it now throws.
When run C++17 kernel in Jupyter notebook cause some errors
due to currently clang-5.0 in https://root.cern.ch/download/cling/ is not
support c++17.
So add support to C++1z for Jupyter kernel and we can try some new
features in Jupyter notebook.
for avoiding following error:
[I 05:46:38.253 NotebookApp] Kernel restarted:
d3413fa0-7046-4b63-912b-a286610eacc1
error: invalid value 'c++17' in '-std=c++17'
note: use 'c++98' or 'c++03' for 'ISO C++ 1998 with amendments' standard
note: use 'gnu++98' or 'gnu++03' for 'ISO C++ 1998 with amendments and
GNU extensions' standard
note: use 'c++11' for 'ISO C++ 2011 with amendments' standard
note: use 'gnu++11' for 'ISO C++ 2011 with amendments and GNU
extensions' standard
note: use 'c++14' for 'ISO C++ 2014 with amendments' standard
note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU
extensions' standard
note: use 'c++1z' for 'Working draft for ISO C++ 2017' standard
note: use 'gnu++1z' for 'Working draft for ISO C++ 2017 with GNU
extensions' standard
Fixes an issue for ATLAS, where Property<string>::Property<string&> cannot be instantiated by ROOT.
ROOT is trying to do that because the function is templated, with all template parameters having defaults.
(This "let us instantiate if all template params have defaults" is needed e.g. to see pair::pair() which is sfinae protected.)
This is a preparation because we want to ship module configuration
files in the future in the cling resource directory (Clang VFS overlay
files and modulemaps). This means that we will need to know this path
in a few other places (e.g. where we specify the -ivfsoverlayPATH
arguments and potential -fmodule-map-file=PATH args)
It also makes this giant function a bit easier on the eyes.