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Initial parsing and pretty-printing
author Adam Chlipala <adamc@hcoop.net>
date Sat, 26 Jan 2008 12:35:32 -0500
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0:502c6d622477 1:4202f6eda946
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 (* Pretty-printing Laconic/Web *)
29
30 structure LaconicPrint :> LACONIC_PRINT = struct
31
32 open Print.PD
33 open Print
34
35 open Laconic
36
37 fun p_kind' par (k, _) =
38 case k of
39 KType => string "Type"
40 | KArrow (k1, k2) => parenIf par (box [p_kind' true k1,
41 space,
42 string "->",
43 space,
44 p_kind k2])
45 | KName => string "Name"
46 | KRecord k => box [string "{", p_kind k, string "}"]
47
48 and p_kind k = p_kind' false k
49
50 fun p_explicitness e =
51 case e of
52 Explicit => string "::"
53 | Implicit => string ":::"
54
55 fun p_con' par (c, _) =
56 case c of
57 CAnnot (c, k) => box [string "(",
58 p_con c,
59 space,
60 string "::",
61 space,
62 p_kind k,
63 string ")"]
64
65 | TFun (t1, t2) => parenIf par (box [p_con' true t1,
66 space,
67 string "->",
68 space,
69 p_con t2])
70 | TCFun (e, x, k, c) => parenIf par (box [string x,
71 space,
72 p_explicitness e,
73 space,
74 p_kind k,
75 space,
76 string "->",
77 space,
78 p_con c])
79 | TRecord (CRecord xcs, _) => box [string "{",
80 p_list (fn (x, c) =>
81 box [p_con x,
82 space,
83 string ":",
84 space,
85 p_con c]) xcs,
86 string "}"]
87 | TRecord c => box [string "$",
88 p_con' true c]
89
90 | CVar s => string s
91 | CApp (c1, c2) => parenIf par (box [p_con c1,
92 space,
93 p_con' true c2])
94 | CAbs (e, x, k, c) => parenIf par (box [string "fn",
95 space,
96 string x,
97 space,
98 p_explicitness e,
99 space,
100 p_kind k,
101 space,
102 string "=>",
103 space,
104 p_con c])
105
106 | CName s => box [string "#", string s]
107
108 | CRecord xcs => box [string "[",
109 p_list (fn (x, c) =>
110 box [p_con x,
111 space,
112 string "=",
113 space,
114 p_con c]) xcs,
115 string "]"]
116 | CConcat (c1, c2) => parenIf par (box [p_con' true c1,
117 space,
118 string "++",
119 space,
120 p_con c2])
121
122 and p_con c = p_con' false c
123
124 fun p_decl ((d, _) : decl) =
125 case d of
126 DCon (x, NONE, c) => box [string "con",
127 space,
128 string x,
129 space,
130 string "=",
131 space,
132 p_con c]
133 | DCon (x, SOME k, c) => box [string "con",
134 space,
135 string x,
136 space,
137 string "::",
138 space,
139 p_kind k,
140 space,
141 string "=",
142 space,
143 p_con c]
144
145 val p_file = p_list_sep newline p_decl
146
147 end