adamc@29: (* Copyright (c) 2008, Adam Chlipala
adamc@29:  * All rights reserved.
adamc@29:  *
adamc@29:  * Redistribution and use in source and binary forms, with or without
adamc@29:  * modification, are permitted provided that the following conditions are met:
adamc@29:  *
adamc@29:  * - Redistributions of source code must retain the above copyright notice,
adamc@29:  *   this list of conditions and the following disclaimer.
adamc@29:  * - Redistributions in binary form must reproduce the above copyright notice,
adamc@29:  *   this list of conditions and the following disclaimer in the documentation
adamc@29:  *   and/or other materials provided with the distribution.
adamc@29:  * - The names of contributors may not be used to endorse or promote products
adamc@29:  *   derived from this software without specific prior written permission.
adamc@29:  *
adamc@29:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@29:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@29:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@29:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
adamc@29:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@29:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@29:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@29:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@29:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@29:  * POSSIBILITY OF SUCH DAMAGE.
adamc@29:  *)
adamc@29: 
adamc@29: structure Cjrize :> CJRIZE = struct
adamc@29: 
adamc@29: structure L = Flat
adamc@29: structure L' = Cjr
adamc@29: 
adamc@29: structure Sm :> sig
adamc@29:     type t
adamc@29: 
adamc@29:     val empty : t
adamc@29:     val find : t * (string * L.typ) list * (string * L'.typ) list -> t * int
adamc@29: 
adamc@29:     val declares : t -> (int * (string * L'.typ) list) list
adamc@29: end = struct
adamc@29: 
adamc@29: structure FM = BinaryMapFn(struct
adamc@29:                            type ord_key = L.typ
adamc@29:                            val compare = FlatUtil.Typ.compare
adamc@29:                            end)
adamc@29: 
adamc@29: type t = int * int FM.map * (int * (string * L'.typ) list) list
adamc@29: 
adamc@29: val empty = (0, FM.empty, [])
adamc@29: 
adamc@29: fun find ((n, m, ds), xts, xts') =
adamc@29:     let
adamc@29:         val t = (L.TRecord xts, ErrorMsg.dummySpan)
adamc@29:     in
adamc@29:         case FM.find (m, t) of
adamc@29:             NONE => ((n+1, FM.insert (m, t, n), (n, xts') :: ds), n)
adamc@29:           | SOME i => ((n, m, ds), i)
adamc@29:     end
adamc@29: 
adamc@29: fun declares (_, _, ds) = ds
adamc@29: 
adamc@29: end
adamc@29: 
adamc@29: fun cifyTyp ((t, loc), sm) =
adamc@29:     case t of
adamc@29:         L.TTop => ((L'.TTop, loc), sm)
adamc@29:       | L.TFun (t1, t2) =>
adamc@29:         let
adamc@29:             val (_, sm) = cifyTyp (t1, sm)
adamc@29:             val (_, sm) = cifyTyp (t2, sm)
adamc@29:         in
adamc@29:             ((L'.TFun, loc), sm)
adamc@29:         end
adamc@29:       | L.TCode (t1, t2) =>
adamc@29:         let
adamc@29:             val (t1, sm) = cifyTyp (t1, sm)
adamc@29:             val (t2, sm) = cifyTyp (t2, sm)
adamc@29:         in
adamc@29:             ((L'.TCode (t1, t2), loc), sm)
adamc@29:         end
adamc@29:       | L.TRecord xts =>
adamc@29:         let
adamc@29:             val old_xts = xts
adamc@29:             val (xts, sm) = ListUtil.foldlMap (fn ((x, t), sm) =>
adamc@29:                                                   let
adamc@29:                                                       val (t, sm) = cifyTyp (t, sm)
adamc@29:                                                   in
adamc@29:                                                       ((x, t), sm)
adamc@29:                                                   end)
adamc@29:                                               sm xts
adamc@29:             val (sm, si) = Sm.find (sm, old_xts, xts)
adamc@29:         in
adamc@29:             ((L'.TRecord si, loc), sm)
adamc@29:         end
adamc@29:       | L.TNamed n => ((L'.TNamed n, loc), sm)
adamc@29: 
adamc@29: fun cifyExp ((e, loc), sm) =
adamc@29:     case e of
adamc@29:         L.EPrim p => ((L'.EPrim p, loc), sm)
adamc@29:       | L.ERel n => ((L'.ERel n, loc), sm)
adamc@29:       | L.ENamed n => ((L'.ENamed n, loc), sm)
adamc@29:       | L.ECode n => ((L'.ECode n, loc), sm)
adamc@29:       | L.EApp (e1, e2) =>
adamc@29:         let
adamc@29:             val (e1, sm) = cifyExp (e1, sm)
adamc@29:             val (e2, sm) = cifyExp (e2, sm)
adamc@29:         in
adamc@29:             ((L'.EApp (e1, e2), loc), sm)
adamc@29:         end
adamc@29: 
adamc@29:       | L.ERecord xes =>
adamc@29:         let
adamc@29:             val old_xts = map (fn (x, _, t) => (x, t)) xes
adamc@29: 
adamc@29:             val (xets, sm) = ListUtil.foldlMap (fn ((x, e, t), sm) =>
adamc@29:                                                   let
adamc@29:                                                       val (e, sm) = cifyExp (e, sm)
adamc@29:                                                       val (t, sm) = cifyTyp (t, sm)
adamc@29:                                                   in
adamc@29:                                                       ((x, e, t), sm)
adamc@29:                                                   end)
adamc@29:                             sm xes
adamc@29: 
adamc@29:             val (sm, si) = Sm.find (sm, old_xts, map (fn (x, _, t) => (x, t)) xets)
adamc@29: 
adamc@29:             val xes = map (fn (x, e, _) => (x, e)) xets
adamc@29:             val xes = ListMergeSort.sort (fn ((x1, _), (x2, _)) => String.compare (x1, x2) = GREATER) xes
adamc@29:         in
adamc@29:             ((L'.ERecord (si, xes), loc), sm)
adamc@29:         end
adamc@29:       | L.EField (e, x) =>
adamc@29:         let
adamc@29:             val (e, sm) = cifyExp (e, sm)
adamc@29:         in
adamc@29:             ((L'.EField (e, x), loc), sm)
adamc@29:         end
adamc@29: 
adamc@29:       | L.ELet (xes, e) =>
adamc@29:         let
adamc@29:             val (xes, sm) = ListUtil.foldlMap (fn ((x, t, e), sm) =>
adamc@29:                                                   let
adamc@29:                                                       val (t, sm) = cifyTyp (t, sm)
adamc@29:                                                       val (e, sm) = cifyExp (e, sm)
adamc@29:                                                   in
adamc@29:                                                       ((x, t, e), sm)
adamc@29:                                                   end)
adamc@29:                             sm xes
adamc@29:             val (e, sm) = cifyExp (e, sm)
adamc@29:         in
adamc@29:             ((L'.ELet (xes, e), loc), sm)
adamc@29:         end
adamc@29: 
adamc@29: fun cifyDecl ((d, loc), sm) =
adamc@29:     case d of
adamc@29:         L.DVal (x, n, t, e) =>
adamc@29:         let
adamc@29:             val (t, sm) = cifyTyp (t, sm)
adamc@29:             val (e, sm) = cifyExp (e, sm)
adamc@29:         in
adamc@29:             ((L'.DVal (x, n, t, e), loc), sm)
adamc@29:         end
adamc@29:       | L.DFun (n, x, dom, ran, e) =>
adamc@29:         let
adamc@29:             val (dom, sm) = cifyTyp (dom, sm)
adamc@29:             val (ran, sm) = cifyTyp (ran, sm)
adamc@29:             val (e, sm) = cifyExp (e, sm)
adamc@29:         in
adamc@29:             ((L'.DFun (n, x, dom, ran, e), loc), sm)
adamc@29:         end
adamc@29: 
adamc@29: fun cjrize ds =
adamc@29:     let
adamc@29:         val (ds, sm) = ListUtil.foldlMap cifyDecl Sm.empty ds
adamc@29:     in
adamc@29:         List.revAppend (map (fn v => (L'.DStruct v, ErrorMsg.dummySpan)) (Sm.declares sm),
adamc@29:                         ds)
adamc@29:     end
adamc@29: 
adamc@29: end