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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.
*)
(* Pretty-printing flat-code Laconic/Web *)
structure FlatPrint :> FLAT_PRINT = struct
open Print.PD
open Print
open Flat
structure E = FlatEnv
val debug = ref false
val dummyTyp = (TNamed 0, ErrorMsg.dummySpan)
fun p_typ' par env (t, _) =
case t of
TTop => string "?"
| TFun (t1, t2) => parenIf par (box [p_typ' true env t1,
space,
string "->",
space,
p_typ env t2])
| TCode (t1, t2) => parenIf par (box [p_typ' true env t1,
space,
string "-->",
space,
p_typ env t2])
| TRecord xcs => box [string "{",
p_list (fn (x, t) =>
box [string x,
space,
string ":",
space,
p_typ env t]) xcs,
string "}"]
| TNamed n =>
if !debug then
string (#1 (E.lookupTNamed env n) ^ "__" ^ Int.toString n)
else
string (#1 (E.lookupTNamed env n))
and p_typ env = p_typ' false env
fun p_exp' par env (e, _) =
case e of
EPrim p => Prim.p_t p
| ERel n =>
((if !debug then
string (#1 (E.lookupERel env n) ^ "_" ^ Int.toString n)
else
string (#1 (E.lookupERel env n)))
handle E.UnboundRel _ => string ("UNBOUND" ^ Int.toString n))
| ENamed n =>
if !debug then
string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
else
string (#1 (E.lookupENamed env n))
| ECode n => string ("code$" ^ Int.toString n)
| EApp (e1, e2) => parenIf par (box [p_exp env e1,
space,
p_exp' true env e2])
| ERecord xes => box [string "{",
p_list (fn (x, e, _) =>
box [string x,
space,
string "=",
space,
p_exp env e]) xes,
string "}"]
| EField (e, x) =>
box [p_exp' true env e,
string ".",
string x]
| ELet (xes, e) =>
let
val (env, pps) = foldl (fn ((x, _, e), (env, pps)) =>
(E.pushERel env x dummyTyp,
List.revAppend ([space,
string "val",
space,
string x,
space,
string "=",
space,
p_exp env e],
pps)))
(env, []) xes
in
box [string "let",
space,
box (rev pps),
space,
string "in",
space,
p_exp env e,
space,
string "end"]
end
and p_exp env = p_exp' false env
fun p_decl env ((d, _) : decl) =
case d of
DVal (x, n, t, e) =>
let
val xp = if !debug then
box [string x,
string "__",
string (Int.toString n)]
else
string x
in
box [string "val",
space,
xp,
space,
string ":",
space,
p_typ env t,
space,
string "=",
space,
p_exp env e]
end
| DFun (n, x, dom, ran, e) =>
let
val xp = if !debug then
box [string x,
string "__",
string (Int.toString n)]
else
string x
in
box [string "fun",
space,
string "code$",
string (Int.toString n),
space,
string "(",
xp,
space,
string ":",
space,
p_typ env dom,
string ")",
space,
string ":",
space,
p_typ env ran,
space,
string "=",
space,
p_exp (E.pushERel env x dom) e]
end
fun p_file env file =
let
val (_, pds) = ListUtil.mapfoldl (fn (d, env) =>
(E.declBinds env d,
p_decl env d))
env file
in
p_list_sep newline (fn x => x) pds
end
end
|
