I don't think that is what is going on, this is invoking the constructor for the weekday class with the "modern" uniform initilization syntax. This solves the o

I don't think that is what is going on, this is invoking the constructor for the weekday class with the "modern" uniform initilization syntax. This solves the old C++ most vexing parse problem. https://en.wikipedia.org/wiki/Most_vexing_parse https://en.wikipedia.org/wiki/Most_vexing_parse It seems like this is the C++ class in question: https://howardhinnant.github.io/date/iso_week.html https://howardhinnant.github.io/date/iso_week.html