Feature request

Feature description

Stream logging should be implemented as it

1. has better type handling (type safety and no need to change a format string if the type changes)
2. allows simple output of types not supported by the printf format specifiers.

Implementation considerations

The stream log commands could use the existing log functions. Simplified example:

#include <sstream>

#define LOG(...) printf(__VA_ARGS__)
#define LOG_STREAM(args) std::stringstream ss; ss << args; LOG("%s", ss.str().c_str())

int main()
{
    int a = 2019;
    std::string s = "World";
    
    LOG("Hello %s %i\n", s.c_str(), a);
    LOG_STREAM("Hello " << s << " " << a << "\n");
    
    return 0;
}