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(* Copyright (c) 2008, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
(* Generic printing support code *)
structure Print :> PRINT = struct
structure SM = TextIOPP
structure PD = PPDescFn(SM)
type 'a printer = 'a -> PD.pp_desc
fun box ds = PD.hovBox (PD.PPS.Rel 1, ds)
fun parenIf b d =
if b then
box [PD.string "(", d, PD.string ")"]
else
d
val space = PD.space 1
val out = SM.openOut {dst = TextIO.stdOut, wid = 70}
val err = SM.openOut {dst = TextIO.stdErr, wid = 70}
fun p_list_sep sep f ls =
case ls of
[] => PD.string ""
| [x] => f x
| x :: rest =>
let
val tokens = foldr (fn (x, tokens) =>
sep :: PD.cut :: f x :: tokens)
[] rest
in
box (f x :: tokens)
end
fun p_list f = p_list_sep (box [PD.string ",", space]) f
fun fprint f d = (PD.description (f, d);
PD.PPS.flushStream f)
val print = fprint out
val eprint = fprint err
fun fpreface f (s, d) =
fprint f (PD.hovBox (PD.PPS.Rel 0,
[PD.string s, PD.space 1, d, PD.newline]))
val preface = fpreface out
val epreface = fpreface err
fun fprefaces f s ls =
let
val len = foldl (fn ((s, _), best) =>
Int.max (size s, best)) 0 ls
in
fprint f (PD.string s);
fprint f PD.newline;
app (fn (s, d) =>
let
val s = CharVector.tabulate (len - size s,
fn _ => #" ")
^ s ^ ": "
in
fpreface f (s, d)
end) ls
end
val prefaces = fprefaces out
val eprefaces = fprefaces err
fun fprefaces' f ls =
let
val len = foldl (fn ((s, _), best) =>
Int.max (size s, best)) 0 ls
in
app (fn (s, d) =>
let
val s = CharVector.tabulate (len - size s,
fn _ => #" ")
^ s ^ ": "
in
fpreface f (s, d)
end) ls
end
val prefaces' = fprefaces' out
val eprefaces' = fprefaces' err
end
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