How to create functions like std::cout?

Question

I\'m creating my own logging utility for my project, I want to create a function like iostream\'s std::cout, to log to a file and print to the console as well.

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Answer 1

I will not enter coding details here, but I will provide you some quick guidelines :

1. Create a singleton object pool (for loggers is ok to create a singleton) or a namespace or a that returns a certain log class according to the enum :

   Logger& SingletonLoggersManager::GetLoggerForLevel(eLogLevel);

2. Override the "<<" operator for your class in order to allow outputting accoridng to your needs in your Logger class

https://msdn.microsoft.com/en-us/library/1z2f6c2k.aspx

3. Define a macro in order to be able to make a quick call inside your code :

   #define LOG(x) SingletonLogger::GetLoggerForLevel(eLogLoevel);

Now when you use inside your code

 Log(debug) << "test" 

It will expand to :

 (SingletonLogger::GetLoogerForLevel(debug)) << "test";