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(*
Title: Standard Basis Library: Primitive Text IO
Copyright David C.J. Matthews 2000
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
(* QUESTION: What is the relationship between TextPrimIO and TextIO?
Is TextIO.StreamIO.reader supposed to be the same as TextPrimIO.reader
and similarly for writer? Assume yes. Yes, in G&R these are explicit*)
structure TextPrimIO :>
sig
include PRIM_IO
where type vector = CharVector.vector
where type elem = Char.char
where type array = CharArray.array
where type pos = Position.int
where type vector_slice = CharVectorSlice.slice
where type array_slice = CharArraySlice.slice
end =
PrimIO (
structure Array = CharArray
structure Vector = CharVector
structure ArraySlice = CharArraySlice
structure VectorSlice = CharVectorSlice
val someElem : Array.elem = #" " (* Initialise to spaces. *)
(* BinPrimIO.pos is defined to be Position.int. TextPrimIO.pos
may be abstract. It's very convenient to be able to build
additional readers and that requires pos to be non-abstract. *)
type pos = Position.int
val compare = Position.compare
);
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