cmake/MacroRootDict.cmake adding std:: containing struct to dictionary

[jgalan]

Now, the dictionary for structures will be added in the class that they are used with a std:: list.

Extract from cmake output:

-- Testing disabled (Disabled by default, enabled via -DTEST=ON flag)
-- /usr/bin/git submodule foreach git rev-parse --git-path hooks
-- Check for ROOT_DICT_OUTPUT_DIR: /home/jgalan/rest-framework/build/rootdict
-- Check for ROOT_DICT_CINT_DEFINITIONS: 
-- Begin of external dependencies
-- making build files for /home/jgalan/rest-framework/source/framework, schema evolution: 
specified sub-dirs: external/tinyxml;tools;core;analysis;masks
-- Adding std::vector<HistoInfoSet> to the dictionary!
-- Adding std::map<std::string, RelevantQuantity> to the dictionary!

This solves a problem that appeared when trying to read a TRestDataSet.

See also:
https://root-forum.cern.ch/t/problem-with-std-map-and-structure-when-stored-in-root-i-o-streamer-dictionary/52852

[juanangp]

Don't quite understand these changes, this is to create some kind of umbrella dictionary for all stl containers?

[jgalan]

Don quite understand these changes, this is to create some kind of umbrella dictionary for all stl containers?

It generates the following new lines inside the LinkDef file we generate before dictionary compilation.

#pragma link C++ class RelevantQuantity+;
#pragma link C++ class std::map<std::string, RelevantQuantity>+;

The full TRestDataSet_LinkDef.h file looks as follows:

#ifdef __CINT__
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link C++ nestedclasses;
#pragma link C++ nestedtypedef;
#pragma link C++ class RelevantQuantity+;
#pragma link C++ class std::map<std::string, RelevantQuantity>+;
#pragma link C++ class TRestDataSet+;
#endif

It was to solve the problem reported in the ROOT forum
https://root-forum.cern.ch/t/problem-with-std-map-and-structure-when-stored-in-root-i-o-streamer-dictionary/52852

The code addition searches for struct StructName and then it searches if a std::XYZ <StructName> exists, if it does it automatically creates those new lines inside the LinkDef.

[jgalan]

It is a critical/urgent update I need to be able to open files generated using TRestDataSet.