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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.
*)
structure Cjrize :> CJRIZE = struct
structure L = Flat
structure L' = Cjr
structure Sm :> sig
type t
val empty : t
val find : t * (string * L.typ) list * (string * L'.typ) list -> t * int
val declares : t -> (int * (string * L'.typ) list) list
end = struct
structure FM = BinaryMapFn(struct
type ord_key = L.typ
val compare = FlatUtil.Typ.compare
end)
type t = int * int FM.map * (int * (string * L'.typ) list) list
val empty = (0, FM.empty, [])
fun find ((n, m, ds), xts, xts') =
let
val t = (L.TRecord xts, ErrorMsg.dummySpan)
in
case FM.find (m, t) of
NONE => ((n+1, FM.insert (m, t, n), (n, xts') :: ds), n)
| SOME i => ((n, m, ds), i)
end
fun declares (_, _, ds) = ds
end
fun cifyTyp ((t, loc), sm) =
case t of
L.TTop => ((L'.TTop, loc), sm)
| L.TFun (t1, t2) =>
let
val (_, sm) = cifyTyp (t1, sm)
val (_, sm) = cifyTyp (t2, sm)
in
((L'.TFun, loc), sm)
end
| L.TCode (t1, t2) =>
let
val (t1, sm) = cifyTyp (t1, sm)
val (t2, sm) = cifyTyp (t2, sm)
in
((L'.TCode (t1, t2), loc), sm)
end
| L.TRecord xts =>
let
val old_xts = xts
val (xts, sm) = ListUtil.foldlMap (fn ((x, t), sm) =>
let
val (t, sm) = cifyTyp (t, sm)
in
((x, t), sm)
end)
sm xts
val (sm, si) = Sm.find (sm, old_xts, xts)
in
((L'.TRecord si, loc), sm)
end
| L.TNamed n => ((L'.TNamed n, loc), sm)
fun cifyExp ((e, loc), sm) =
case e of
L.EPrim p => ((L'.EPrim p, loc), sm)
| L.ERel n => ((L'.ERel n, loc), sm)
| L.ENamed n => ((L'.ENamed n, loc), sm)
| L.ECode n => ((L'.ECode n, loc), sm)
| L.EApp (e1, e2) =>
let
val (e1, sm) = cifyExp (e1, sm)
val (e2, sm) = cifyExp (e2, sm)
in
((L'.EApp (e1, e2), loc), sm)
end
| L.ERecord xes =>
let
val old_xts = map (fn (x, _, t) => (x, t)) xes
val (xets, sm) = ListUtil.foldlMap (fn ((x, e, t), sm) =>
let
val (e, sm) = cifyExp (e, sm)
val (t, sm) = cifyTyp (t, sm)
in
((x, e, t), sm)
end)
sm xes
val (sm, si) = Sm.find (sm, old_xts, map (fn (x, _, t) => (x, t)) xets)
val xes = map (fn (x, e, _) => (x, e)) xets
val xes = ListMergeSort.sort (fn ((x1, _), (x2, _)) => String.compare (x1, x2) = GREATER) xes
in
((L'.ERecord (si, xes), loc), sm)
end
| L.EField (e, x) =>
let
val (e, sm) = cifyExp (e, sm)
in
((L'.EField (e, x), loc), sm)
end
| L.ELet (xes, e) =>
let
val (xes, sm) = ListUtil.foldlMap (fn ((x, t, e), sm) =>
let
val (t, sm) = cifyTyp (t, sm)
val (e, sm) = cifyExp (e, sm)
in
((x, t, e), sm)
end)
sm xes
val (e, sm) = cifyExp (e, sm)
in
((L'.ELet (xes, e), loc), sm)
end
fun cifyDecl ((d, loc), sm) =
case d of
L.DVal (x, n, t, e) =>
let
val (t, sm) = cifyTyp (t, sm)
val (e, sm) = cifyExp (e, sm)
in
((L'.DVal (x, n, t, e), loc), sm)
end
| L.DFun (n, x, dom, ran, e) =>
let
val (dom, sm) = cifyTyp (dom, sm)
val (ran, sm) = cifyTyp (ran, sm)
val (e, sm) = cifyExp (e, sm)
in
((L'.DFun (n, x, dom, ran, e), loc), sm)
end
fun cjrize ds =
let
val (ds, sm) = ListUtil.foldlMap cifyDecl Sm.empty ds
in
List.revAppend (map (fn v => (L'.DStruct v, ErrorMsg.dummySpan)) (Sm.declares sm),
ds)
end
end
|
