问题
While reading Discovering modern C++ by Peter Gottschling I found out that there is a new operator in c++11 named sizeof... . What's the usage of it? I could find only one reference about it over internet in cppreference.
Edit: This is sizeof... operator not sizeof.
Added this as a question here, as it was very difficult to get info about this operator during search. And hoping users will get the answer easier with this.
来源：https://stackoverflow.com/questions/59693407/whats-the-use-of-sizeof-operator-in-c11-not-sizeof-operator