Thiago Macieira via Std-Proposals:
> Also, don't forget uinptr_t, size_t and ptrdiff_t. You *really* shouldn't use
> a specific bit count when dealing with object sizes and pointers.
>
> That means you don't need uint32_t for counting the elements in an array that
> you declared in your function.

WebAssembly specifies "vec" size as unsigned 32 bit integer so I use
std::uint32_t as size and index of element in WebAssembly vectors.

> int, size_t or ptrdiff_t would be just fine.

int is definitely too short.