The C++ standard library tuple is quite versatile. It’s a handy way of grabbing a bunch of types or values into a single unit, and the C++ standard library also provides a number of helpers to manipulate them.

Selecting via an index sequence: https://devblogs.microsoft.com/oldnewthing/20200623-00/?p=103883

Selecting via an index sequence, part 2: https://devblogs.microsoft.com/oldnewthing/20200624-00/?p=103886

Creating interesting index sequences: https://devblogs.microsoft.com/oldnewthing/20200625-00/?p=103890

Creating more interesting index sequences: https://devblogs.microsoft.com/oldnewthing/20200626-00/?p=103896

Finding a type in a tuple: https://devblogs.microsoft.com/oldnewthing/20200629-00/?p=103910