Fid Core Library is the core library for the Frigand Imperial Desktop, a genuine Unix desktop environment based around multiprocessing, text-stream IPC, and the "everything is a file" concept. It supports Emacs-like extensibility, customizability, and built-in multi-buffer support.
fid-listbuffer is a buffer implementation for the Frigand Imperial Desktop. Fid buffers are typically mutable monoids over particular unit types; the exact unit type and the equations satisfied by the monoid determine the particular buffer type. This package defines a parametric buffer type for the simple case of a free monoid over a unit type that is to be exposed to the programmer, where 'replaceableRegion' additionally is equivalent to (\ r d -> return True).