Extending InitFromConfigFile scheme used in REST processes to any metadata class

[jgalan]

I wonder if we could extend the nice system we have inside TRestEventProcess to TRestMetadata (i.e. avoiding re-implementation of InitFromConfigFile for simple parameters).

I thought it could be as simple as implementing TRestMetadata method,

    virtual void InitFromConfigFile() {
        map<string, string> parameters = GetParametersList();

        for (auto& p : parameters) p.second = ReplaceMathematicalExpressions(p.second);

        ReadParametersList(parameters);
    }

however, I run into troubles.

Any quick solution to extend the processes InitFromConfigFile strategy to any metadata class?

[jgalan]

Ok, probably I solved my problems. I created a PR.