summaryrefslogtreecommitdiff
path: root/src/cjrize.sml
blob: 48d1dae3b6441c678825bd49b33457b721cdd303 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
(* 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