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SimeonEhrig/cling_redefinition.md

Created October 14, 2019 11:27
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Cling Redefinition
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cling_redefinition.md

How to enable

[cling]$ #include "cling/Interpreter/Interpreter.h"
[cling]$ gCling->allowRedefinition();
[cling]$ gCling->isRedefinitionAllowed();

About

root-project/root#4214 root-project/cling#259

Access hidden variables

When you redefine a variable, class, or anything else, you are actually overlay the variable, class, etc. This allows you to access the previous definition. The definition uses namespaces to hide variables. It starts with __cling_N50 and continues with __cling_N51 and so on. Right now, I don't know how to determine the namespace of a variable.

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