DefaultAllocator uses new/delete to allocate memory regions

DetachedBuffer is a finished flatbuffer memory region, detached from its builder. The original memory region and allocator are also stored so that the

Container of options that may apply to any of the source/text generators.

Represents any type in the IDL, which is a combination of the BaseType and additional information for vectors/structs_.

small type which has nothrow move ctor but throw copy ctor

Allocator interface. This is flatbuffers-specific and meant only for `vector_downward` usage.

These are used in the lower 2 bits of a type field to determine the size of the elements (and or size field) of the item pointed to (e.g. vector).