summaryrefslogtreecommitdiff
path: root/src/flat_print.sml
blob: ccfceb2f10437637fb3f6bc9eccc43a3180e6483 (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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
(* 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))
      | TFfi (m, x) => box [string "FFI(", string m, string ".", string x, string ")"]

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))
      | EFfi (m, x) => box [string "FFI(", string m, string ".", string x, string ")"]
      | EFfiApp (m, x, es) => box [string "FFI(",
                                   string m,
                                   string ".",
                                   string x,
                                   string "(",
                                   p_list (p_exp env) es,
                                   string "))"]
      | 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.foldlMap (fn (d, env) =>
                                             (p_decl env d,
                                              E.declBinds env d))
                             env file
    in
        p_list_sep newline (fn x => x) pds
    end

end