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comparison src/core_env.sml @ 16:bc7b76ca57e0

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Conversion to Core
author Adam Chlipala <adamc@hcoop.net>
date Sun, 08 Jun 2008 13:59:29 -0400
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children 1ab48e37d0ef
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15:1e645beb3f3b 16:bc7b76ca57e0
1 (* Copyright (c) 2008, Adam Chlipala
2 * All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - The names of contributors may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 *)
27
28 structure CoreEnv :> CORE_ENV = struct
29
30 open Core
31
32 structure U = CoreUtil
33
34 structure IM = IntBinaryMap
35
36
37 (* AST utility functions *)
38
39 val liftConInCon =
40 U.Con.mapB {kind = fn k => k,
41 con = fn bound => fn c =>
42 case c of
43 CRel xn =>
44 if xn < bound then
45 c
46 else
47 CRel (xn + 1)
48 | _ => c,
49 bind = fn (bound, U.Con.Rel _) => bound + 1
50 | (bound, _) => bound}
51
52 val lift = liftConInCon 0
53
54
55 (* Back to environments *)
56
57 exception UnboundRel of int
58 exception UnboundNamed of int
59
60 type env = {
61 relC : (string * kind) list,
62 namedC : (string * kind * con option) IM.map,
63
64 relE : (string * con) list,
65 namedE : (string * con) IM.map
66 }
67
68 val empty = {
69 relC = [],
70 namedC = IM.empty,
71
72 relE = [],
73 namedE = IM.empty
74 }
75
76 fun pushCRel (env : env) x k =
77 {relC = (x, k) :: #relC env,
78 namedC = IM.map (fn (x, k, co) => (x, k, Option.map lift co)) (#namedC env),
79
80 relE = map (fn (x, c) => (x, lift c)) (#relE env),
81 namedE = IM.map (fn (x, c) => (x, lift c)) (#namedE env)}
82
83 fun lookupCRel (env : env) n =
84 (List.nth (#relC env, n))
85 handle Subscript => raise UnboundRel n
86
87 fun pushCNamed (env : env) x n k co =
88 {relC = #relC env,
89 namedC = IM.insert (#namedC env, n, (x, k, co)),
90
91 relE = #relE env,
92 namedE = #namedE env}
93
94 fun lookupCNamed (env : env) n =
95 case IM.find (#namedC env, n) of
96 NONE => raise UnboundNamed n
97 | SOME x => x
98
99 fun pushERel (env : env) x t =
100 {relC = #relC env,
101 namedC = #namedC env,
102
103 relE = (x, t) :: #relE env,
104 namedE = #namedE env}
105
106 fun lookupERel (env : env) n =
107 (List.nth (#relE env, n))
108 handle Subscript => raise UnboundRel n
109
110 fun pushENamed (env : env) x n t =
111 {relC = #relC env,
112 namedC = #namedC env,
113
114 relE = #relE env,
115 namedE = IM.insert (#namedE env, n, (x, t))}
116
117 fun lookupENamed (env : env) n =
118 case IM.find (#namedE env, n) of
119 NONE => raise UnboundNamed n
120 | SOME x => x
121
122 fun declBinds env (d, _) =
123 case d of
124 DCon (x, n, k, c) => pushCNamed env x n k (SOME c)
125 | DVal (x, n, t, _) => pushENamed env x n t
126
127 val ktype = (KType, ErrorMsg.dummySpan)
128
129 fun bbind env x =
130 case ElabEnv.lookupC ElabEnv.basis x of
131 ElabEnv.NotBound => raise Fail "CoreEnv.bbind: Not bound"
132 | ElabEnv.Rel _ => raise Fail "CoreEnv.bbind: Rel"
133 | ElabEnv.Named (n, _) => pushCNamed env x n ktype NONE
134
135 val basis = empty
136 val basis = bbind basis "int"
137 val basis = bbind basis "float"
138 val basis = bbind basis "string"
139
140 end