Ep 291: Start Using `as_const`

Summary

This episode explains how to safely treat non-const objects as const when you need to call const-qualified member functions. Jason addresses feedback from viewers who claimed they needed const_cast to add const-qualification, and demonstrates why std::as_const (added in C++17) is a much safer alternative. The episode shows how to implement as_const yourself for pre-C++17 codebases, discusses issues with using const_cast or static_cast for this purpose, and explains the legitimate use cases for explicitly calling const member functions on non-const objects.