[0010] Include a pseudo-hlsl/c++ class declaration for vk::BufferPointer<T,A> and any associated built-in functions/types

[llvm-beanz]

Which proposal does this relate to?
0010-vk-buffer-ref.md

Describe the issue or outstanding question.
For clarity and understanding of the spec it would be helpful to include a pseudo HLSL/C++ class declaration for vk::BufferPointer<T,A> in the spec and any reasonable pseudo-code for implementation. This both will help in the readability and understanding of the new objects and APIs and helps us move toward our goal of being able to define HLSL types in HLSL.

Additional context
See initial review discussion.

[devshgraphicsprogramming]

would be also useful to have a #ifdef __cplusplus version so we can share structure definitions between C++ and HLSL

[llvm-beanz]

Providing a C++ implementation of HLSL built-in types is not a goal of our spec process. I filed this to request a pseudo-object definition to help with the readability of the spec, that's not the same as making code that can actually be compiled.

[devshgraphicsprogramming]

but it would be a very small step to provide one in this case.