author | wenzelm |
Fri, 16 Jul 1999 22:24:42 +0200 | |
changeset 7024 | 44bd3c094fd6 |
parent 6316 | 4a786a8a1a97 |
child 7754 | 4b1bc1266c8c |
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 = File.write path (content buffer); end;