author | wenzelm |
Wed, 06 Jul 2005 10:41:46 +0200 | |
changeset 16712 | c7d1c79d921c |
parent 14981 | e73f8140af78 |
child 17062 | 7272b45099c7 |
permissions | -rw-r--r-- |
(* Title: Pure/General/buffer.ML ID: $Id$ Author: Markus Wenzel, TU Muenchen Simple string buffers. *) signature BUFFER = sig type T val empty: T val add: string -> T -> T val content: T -> string val write: Path.T -> T -> unit end; structure Buffer: BUFFER = struct datatype T = Buffer of string list; val empty = Buffer []; fun add x (Buffer xs) = Buffer (x :: xs); fun content (Buffer xs) = implode (rev xs); fun write path (Buffer xs) = File.write_list path (rev xs); end;