native_* examples in cpp documentation

[stefansjs]

Hey folks. You may or may not know that I've been attempting to maintain a flatbuffers syntax highlighting plugin for IntelliJ IDEs. https://github.com/stefansjs/flatbuffers-intellij-plugin. I recent had an issue filed (stefansjs/flatbuffers-intellij-plugin#27) that I don't support the native_* directives. I went to look for the documentation and examples, but the examples are hard to follow because they show what the generated code looks like and not how to use them.

Can you add a "how to use" oriented documentation section the native_* documentation?

Here's my best guess

namespace Geometry;

attribute force_align;

struct Vector3D (native_type:"Native::Vector3D", force_align)
{
  // according to the flatbuffers parser implementation, native_inline and native_default are only relevant to a struct
  x:float (native_inline, native_default:10);
  y:float;
  z:float;
}

// Howerver, a custom allocator may be applied to a struct or a table, esp to allocate native struct types
table ApplicationData(native_custom_alloc:"custom_allocator") {
  vectors:[Vector3D];
}