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comparison src/mono_env.sml @ 25:0a762c73824d

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Monoize
author Adam Chlipala <adamc@hcoop.net>
date Tue, 10 Jun 2008 13:14:45 -0400
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children d3cc191cb25f
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24:ea15905e598d 25:0a762c73824d
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 MonoEnv :> MONO_ENV = struct
29
30 open Mono
31
32 structure IM = IntBinaryMap
33
34
35 exception UnboundRel of int
36 exception UnboundNamed of int
37
38 type env = {
39 namedT : (string * typ option) IM.map,
40
41 relE : (string * typ) list,
42 namedE : (string * typ * exp option) IM.map
43 }
44
45 val empty = {
46 namedT = IM.empty,
47
48 relE = [],
49 namedE = IM.empty
50 }
51
52 fun pushTNamed (env : env) x n co =
53 {namedT = IM.insert (#namedT env, n, (x, co)),
54
55 relE = #relE env,
56 namedE = #namedE env}
57
58 fun lookupTNamed (env : env) n =
59 case IM.find (#namedT env, n) of
60 NONE => raise UnboundNamed n
61 | SOME x => x
62
63 fun pushERel (env : env) x t =
64 {namedT = #namedT env,
65
66 relE = (x, t) :: #relE env,
67 namedE = #namedE env}
68
69 fun lookupERel (env : env) n =
70 (List.nth (#relE env, n))
71 handle Subscript => raise UnboundRel n
72
73 fun pushENamed (env : env) x n t eo =
74 {namedT = #namedT env,
75
76 relE = #relE env,
77 namedE = IM.insert (#namedE env, n, (x, t, eo))}
78
79 fun lookupENamed (env : env) n =
80 case IM.find (#namedE env, n) of
81 NONE => raise UnboundNamed n
82 | SOME x => x
83
84 fun declBinds env (d, _) =
85 case d of
86 DVal (x, n, t, e) => pushENamed env x n t (SOME e)
87
88 fun bbind env x =
89 case ElabEnv.lookupC ElabEnv.basis x of
90 ElabEnv.NotBound => raise Fail "MonoEnv.bbind: Not bound"
91 | ElabEnv.Rel _ => raise Fail "MonoEnv.bbind: Rel"
92 | ElabEnv.Named (n, _) => pushTNamed env x n NONE
93
94 val basis = empty
95 val basis = bbind basis "int"
96 val basis = bbind basis "float"
97 val basis = bbind basis "string"
98
99 end