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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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children 5c3cc348e9e6
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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 (* Grammar for Laconic/Web programs *)
29
30 open Laconic
31
32 val s = ErrorMsg.spanOf
33
34 %%
35 %header (functor LacwebLrValsFn(structure Token : TOKEN))
36
37 %term
38 EOF
39 | SYMBOL of string | CSYMBOL of string
40 | LPAREN | RPAREN | LBRACK | RBRACK | LBRACE | RBRACE
41 | EQ | COMMA | COLON | DCOLON | TCOLON | DOT | HASH
42 | CON | TYPE | NAME
43 | ARROW | LARROW | DARROW
44 | FN | PLUSPLUS | DOLLAR
45
46 %nonterm
47 file of decl list
48 | decls of decl list
49 | decl of decl
50
51 | kind of kind
52 | kcolon of explicitness
53
54 | cexp of con
55 | capps of con
56 | cterm of con
57 | ident of con
58 | rcon of (con * con) list
59 | rcone of (con * con) list
60
61 %verbose (* print summary of errors *)
62 %pos int (* positions *)
63 %start file
64 %pure
65 %eop EOF
66 %noshift EOF
67
68 %name Lacweb
69
70 %nonassoc DARROW
71 %nonassoc COLON
72 %right COMMA
73 %right ARROW LARROW
74 %right PLUSPLUS
75 %nonassoc DOLLAR
76 %left DOT
77
78 %%
79
80 file : decls (decls)
81
82 decls : ([])
83 | decl decls (decl :: decls)
84
85 decl : CON SYMBOL EQ cexp (DCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
86 | CON SYMBOL DCOLON kind EQ cexp (DCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
87
88 kind : TYPE (KType, s (TYPEleft, TYPEright))
89 | NAME (KName, s (NAMEleft, NAMEright))
90 | LBRACE kind RBRACE (KRecord kind, s (LBRACEleft, RBRACEright))
91 | kind ARROW kind (KArrow (kind1, kind2), s (kind1left, kind2right))
92 | LPAREN kind RPAREN (#1 kind, s (LPARENleft, RPARENright))
93
94 capps : cterm (cterm)
95 | capps cterm (CApp (capps, cterm), s (cappsleft, ctermright))
96
97 cexp : capps (capps)
98 | cexp ARROW cexp (TFun (cexp1, cexp2), s (cexp1left, cexp2right))
99 | SYMBOL kcolon kind ARROW cexp (TCFun (kcolon, SYMBOL, kind, cexp), s (SYMBOLleft, cexpright))
100
101 | cexp PLUSPLUS cexp (CConcat (cexp1, cexp2), s (cexp1left, cexp1right))
102
103 | FN SYMBOL kcolon kind DARROW cexp (CAbs (kcolon, SYMBOL, kind, cexp), s (FNleft, cexpright))
104
105 kcolon : DCOLON (Explicit)
106 | TCOLON (Implicit)
107
108 cterm : LPAREN cexp RPAREN (#1 cexp, s (LPARENleft, RPARENright))
109 | LBRACK rcon RBRACK (CRecord rcon, s (LBRACKleft, RBRACKright))
110 | LBRACE rcone RBRACE (TRecord (CRecord rcone, s (LBRACEleft, RBRACEright)),
111 s (LBRACEleft, RBRACEright))
112 | DOLLAR cterm (TRecord cterm, s (DOLLARleft, ctermright))
113 | HASH CSYMBOL (CName CSYMBOL, s (HASHleft, CSYMBOLright))
114
115 | SYMBOL (CVar SYMBOL, s (SYMBOLleft, SYMBOLright))
116
117 rcon : ([])
118 | ident EQ cexp ([(ident, cexp)])
119 | ident EQ cexp COMMA rcon ((ident, cexp) :: rcon)
120
121 rcone : ([])
122 | ident COLON cexp ([(ident, cexp)])
123 | ident COLON cexp COMMA rcone ((ident, cexp) :: rcone)
124
125 ident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
126 | SYMBOL (CVar SYMBOL, s (SYMBOLleft, SYMBOLright))