Derive Macro FerrayRecord 

#[derive(FerrayRecord)]

Derive macro that generates an unsafe impl FerrayRecord for a #[repr(C)] struct.

Requirements

• The struct must have #[repr(C)].
• All fields must implement ferray_core::dtype::Element.

Generated code

• field_descriptors() returns a static slice of FieldDescriptor with correct name, dtype, offset, and size for each field.
• record_size() returns std::mem::size_of::<Self>().