This is work in progress, which currently handles cases in a function body and in initializers for variables.

This is work in progress, which currently handles: * cases in a function bodies * initializers for variables * decltype() for variables * decltype() for function return values * auto for variables * constexpt/consteval for function and variable types

This is work in progress, which currently handles cases in a function body: and in initializers for variables. * cases in a function bodies * initializers for variables * decltype() for variables * decltype() for function return values * auto for variables * constexpt/consteval for function and variable types