IDL4CPP — Using floating point types to instantiate pre C++20 templates

Prior to C++20, the following template cannot be instantiated:

template <typename T, const T thingy>
class MyTemplate {};

MyTemplate<double, 5.0> x;

Mapping for min, max, and ranged remains the same

In this case, an alternative implementation would introduce too much complexity. For that reason, we propose to defer this issue to future RTFs. State of the art compilers supporting C++20 work with the proposed mapping. Future RTFs may add additional information for implementers that require compatibility with earlier compilers.