This document is a work in progress. For the latest status, please see the ongoing mailing list thread .

Built-In Types

Fundamental Types

Platform Independent

• int8, uint8, int16, uint16, int32, uint32, int64, uint64, float32, float64, pointer, string, buffer

Platform Dependent

• char, uchar, int, uint, long, ulong, float, double

Composite Types

• struct
• callback

Users [implementations?] would have the ability to add their own aliases for structs, etc.

System Types

In addition, I believe the unix types provided by sys/types.h should be made available by requesting so. Perhaps calling “FFI.add_sys_types” would be fine (this as opposed to a require so that it can be calculated entirely at runtime if need be)