Commit | Line | Data |
---|---|---|
543d3420 SK |
1 | %{ |
2 | open Printf | |
3 | %} | |
4 | ||
5 | /* Declarations */ | |
6 | %token AND | |
7 | %token ARRAY | |
8 | %token ASSIGN | |
9 | %token BREAK | |
10 | %token COLON | |
11 | %token COMMA | |
12 | %token DIVIDE | |
13 | %token DO | |
14 | %token DOT | |
15 | %token ELSE | |
16 | %token END | |
17 | %token EOF | |
18 | %token EQ | |
19 | %token FOR | |
20 | %token FUNCTION | |
21 | %token GE | |
22 | %token GT | |
23 | %token <string> ID | |
24 | %token IF | |
25 | %token IN | |
26 | %token <int> INT | |
27 | %token LBRACE | |
28 | %token LBRACK | |
29 | %token LE | |
30 | %token LET | |
31 | %token LPAREN | |
32 | %token LT | |
33 | %token MINUS | |
34 | %token NEQ | |
35 | %token NIL | |
36 | %token OF | |
37 | %token OR | |
38 | %token PLUS | |
39 | %token RBRACE | |
40 | %token RBRACK | |
41 | %token RPAREN | |
42 | %token SEMICOLON | |
43 | %token <string> STRING | |
44 | %token THEN | |
45 | %token TIMES | |
46 | %token TO | |
47 | %token TYPE | |
48 | %token VAR | |
49 | %token WHILE | |
50 | ||
51 | /* from lowest precedence */ | |
52 | %left OR | |
53 | %left AND | |
54 | %nonassoc EQ NEQ GT LT GE LE | |
55 | %left PLUS MINUS | |
56 | %left TIMES DIVIDE | |
57 | %nonassoc UMINUS | |
58 | /* to highest precedence */ | |
59 | ||
60 | %type <string> program | |
61 | ||
62 | %start program | |
63 | ||
64 | %% | |
65 | ||
66 | program: | |
67 | | exp EOF | |
68 | { | |
69 | sprintf "program[%s]" $1 | |
70 | } | |
71 | ||
72 | exp: | |
73 | | NIL | |
74 | { | |
75 | "nil[]" | |
76 | } | |
77 | | INT | |
78 | { | |
79 | sprintf "int[%d]" $1 | |
80 | } | |
81 | | MINUS exp %prec UMINUS | |
82 | { | |
83 | sprintf "negation[%s]" $2 | |
84 | } | |
ef945634 | 85 | | ID LBRACK exp RBRACK OF exp |
543d3420 | 86 | { |
ef945634 SK |
87 | let type_id = $1 in |
88 | let exp_1 = $3 in | |
89 | let exp_2 = $6 in | |
90 | sprintf "array[type[%s], size[%s], val[%s]]" type_id exp_1 exp_2 | |
543d3420 | 91 | } |
ef945634 | 92 | | ID LBRACE rec_field_assignments RBRACE |
543d3420 | 93 | { |
ef945634 SK |
94 | let type_id = $1 in |
95 | let rec_field_assignments = $3 in | |
96 | sprintf | |
97 | "record[type[%s], rec_field_assignments[%s]]" | |
98 | type_id rec_field_assignments | |
543d3420 SK |
99 | } |
100 | | lvalue | |
101 | { | |
102 | $1 | |
103 | } | |
104 | | lvalue ASSIGN exp | |
105 | { | |
106 | sprintf "assign[%s := %s]" $1 $3 | |
107 | } | |
108 | | STRING | |
109 | { | |
110 | sprintf "string[%S]" $1 | |
111 | } | |
b9397ef5 | 112 | | ID LPAREN RPAREN |
543d3420 | 113 | { |
29de275c SK |
114 | let id = $1 in |
115 | sprintf "fun_call[%s, []]" id | |
116 | } | |
117 | | ID LPAREN fun_args RPAREN | |
118 | { | |
119 | let id = $1 in | |
120 | let fun_args = $3 in | |
121 | sprintf "fun_call[%s, %s]" id fun_args | |
543d3420 SK |
122 | } |
123 | | exp op exp | |
124 | { | |
125 | sprintf "op[%s %s %s]" $1 $2 $3 | |
126 | } | |
127 | | IF exp THEN exp ELSE exp | |
128 | { | |
129 | let e1 = $2 in | |
130 | let e2 = $4 in | |
131 | let e3 = $6 in | |
132 | sprintf "if_then_else[%s, then[%s], else[%s]]" e1 e2 e3 | |
133 | } | |
134 | | IF exp THEN exp | |
135 | { | |
136 | sprintf "if_then[%s, then[%s]]" $2 $4 | |
137 | } | |
138 | | WHILE exp DO exp | |
139 | { | |
140 | sprintf "while[%s, do[%s]]" $2 $4 | |
141 | } | |
ffff6f35 | 142 | | FOR ID ASSIGN exp TO exp DO exp |
543d3420 SK |
143 | { |
144 | let id = $2 in | |
145 | let e1 = $4 in | |
146 | let e2 = $6 in | |
147 | let e3 = $8 in | |
148 | sprintf "for[%s := %s, to[%s], do[%s]]" id e1 e2 e3 | |
149 | } | |
150 | | BREAK | |
151 | { | |
152 | "break[]" | |
153 | } | |
e7dfac93 | 154 | | LPAREN exps RPAREN |
543d3420 | 155 | { |
e7dfac93 | 156 | sprintf "exps[%s]" $2 |
543d3420 | 157 | } |
e7dfac93 | 158 | | LET decs IN exps END |
543d3420 SK |
159 | { |
160 | let decs = $2 in | |
e7dfac93 SK |
161 | let exps = $4 in |
162 | sprintf "let[decs[%s], in[exps[%s]]]" decs exps | |
543d3420 | 163 | } |
b9397ef5 | 164 | | LPAREN RPAREN |
543d3420 | 165 | { |
b9397ef5 SK |
166 | (* Perhaps "void"? *) |
167 | "unit[]" | |
543d3420 SK |
168 | } |
169 | ||
e7dfac93 | 170 | exps: |
543d3420 SK |
171 | | exp |
172 | { | |
173 | sprintf "%s" $1 | |
174 | } | |
e7dfac93 | 175 | | exp SEMICOLON exps |
543d3420 SK |
176 | { |
177 | sprintf "%s; %s" $1 $3 | |
178 | } | |
179 | ||
180 | decs: | |
181 | | dec | |
182 | { | |
183 | sprintf "%s" $1 | |
184 | } | |
185 | | dec decs | |
186 | { | |
187 | sprintf "%s %s" $1 $2 | |
188 | } | |
189 | ||
190 | dec: | |
3fbeb7c1 SK |
191 | /* Tydec */ |
192 | | TYPE ID EQ ID | |
ef945634 | 193 | { |
3fbeb7c1 SK |
194 | let type_id_new = $2 in |
195 | let type_id_orig = $4 in | |
196 | sprintf "tydec_alias[from[%s], to[%s]]" type_id_new type_id_orig | |
ef945634 | 197 | } |
3fbeb7c1 | 198 | | TYPE ID EQ LBRACE RBRACE |
543d3420 | 199 | { |
3fbeb7c1 SK |
200 | let type_id = $2 in |
201 | sprintf "tydec_empty_record[%s]" type_id | |
543d3420 | 202 | } |
3fbeb7c1 | 203 | | TYPE ID EQ LBRACE tyfields RBRACE |
543d3420 | 204 | { |
3fbeb7c1 SK |
205 | let type_id = $2 in |
206 | let tyfields = $5 in | |
207 | sprintf "tydec_record[%s, fields[%s]]" type_id tyfields | |
208 | } | |
209 | | TYPE ID EQ ARRAY OF ID | |
210 | { | |
211 | let type_id = $2 in | |
212 | let element_type_id = $6 in | |
213 | sprintf "tydec_array[%s, elements_of_type[%s]]" type_id element_type_id | |
543d3420 SK |
214 | } |
215 | ||
3fbeb7c1 | 216 | /* Vardec */ |
ffff6f35 | 217 | | VAR ID ASSIGN exp |
543d3420 SK |
218 | { |
219 | let id = $2 in | |
220 | let exp = $4 in | |
221 | sprintf "vardec[%s, exp[%s]]" id exp | |
222 | } | |
ffff6f35 | 223 | | VAR ID COLON ID ASSIGN exp |
543d3420 SK |
224 | { |
225 | let id = $2 in | |
ef945634 | 226 | let type_id = $4 in |
543d3420 | 227 | let exp = $6 in |
ef945634 | 228 | sprintf "vardec[%s, type_id[%s], exp[%s]]" id type_id exp |
543d3420 SK |
229 | } |
230 | ||
3fbeb7c1 SK |
231 | /* Fundec */ |
232 | | FUNCTION ID LPAREN RPAREN EQ exp | |
543d3420 | 233 | { |
3fbeb7c1 SK |
234 | let id = $2 in |
235 | let exp = $6 in | |
236 | sprintf "fundec[%s, arguments[], exp[%s]]" id exp | |
543d3420 | 237 | } |
3fbeb7c1 | 238 | | FUNCTION ID LPAREN tyfields RPAREN EQ exp |
543d3420 | 239 | { |
3fbeb7c1 SK |
240 | let id = $2 in |
241 | let tyfields = $4 in | |
242 | let exp = $7 in | |
243 | sprintf "fundec[%s, arguments[%s], exp[%s]]" id tyfields exp | |
543d3420 | 244 | } |
3fbeb7c1 | 245 | | FUNCTION ID LPAREN tyfields RPAREN COLON ID EQ exp |
543d3420 | 246 | { |
3fbeb7c1 SK |
247 | let id = $2 in |
248 | let tyfields = $4 in | |
249 | let type_id = $7 in | |
250 | let exp = $9 in | |
251 | sprintf | |
252 | "fundec[%s, tyfields[%s], type_id[%s], exp[%s]]" | |
253 | id tyfields type_id exp | |
543d3420 SK |
254 | } |
255 | ||
256 | tyfields: | |
257 | /*| epsilon */ | |
258 | | tyfield | |
259 | {$1} | |
260 | | tyfield COMMA tyfields | |
261 | { | |
262 | let tyfield = $1 in | |
263 | let tyfields = $3 in | |
264 | sprintf "%s, %s" tyfield tyfields | |
265 | } | |
266 | ||
267 | tyfield: | |
ffff6f35 | 268 | | ID COLON ID |
543d3420 SK |
269 | { |
270 | let id = $1 in | |
271 | let type_id = $3 in | |
272 | sprintf "tyfield[%s, %s]" id type_id | |
273 | } | |
274 | ||
543d3420 | 275 | rec_field_assignments: |
ffff6f35 | 276 | | ID EQ exp |
543d3420 | 277 | { |
ffff6f35 SK |
278 | let id = $1 in |
279 | let exp = $3 in | |
280 | sprintf "%S = %s" id exp | |
543d3420 | 281 | } |
ffff6f35 | 282 | | ID EQ exp COMMA rec_field_assignments |
543d3420 | 283 | { |
ffff6f35 SK |
284 | let id = $1 in |
285 | let exp = $3 in | |
286 | let rec_field_assignments = $5 in | |
287 | sprintf "%S = %s, %s" id exp rec_field_assignments | |
543d3420 SK |
288 | } |
289 | ||
543d3420 SK |
290 | fun_args: |
291 | | exp | |
292 | { | |
293 | $1 | |
294 | } | |
295 | | exp COMMA fun_args | |
296 | { | |
297 | sprintf "%s, %s" $1 $3 | |
298 | } | |
299 | ||
300 | op: | |
301 | | PLUS {"+"} | |
302 | | MINUS {"-"} | |
303 | | TIMES {"*"} | |
304 | | DIVIDE {"/"} | |
305 | | EQ {"="} | |
306 | | NEQ {"<>"} | |
307 | | GT {">"} | |
308 | | LT {"<"} | |
309 | | GE {">="} | |
310 | | LE {"<="} | |
311 | | AND {"&"} | |
312 | | OR {"|"} | |
313 | ||
314 | lvalue: | |
ffff6f35 | 315 | | ID |
543d3420 | 316 | { |
ffff6f35 SK |
317 | let id = $1 in |
318 | sprintf "lvalue[%s]" id | |
543d3420 | 319 | } |
ffff6f35 | 320 | | lvalue DOT ID |
543d3420 | 321 | { |
ffff6f35 SK |
322 | let record = $1 in |
323 | let field = $3 in | |
324 | sprintf "get_record_field[%s, %s]" record field | |
543d3420 SK |
325 | } |
326 | | lvalue LBRACK exp RBRACK | |
327 | { | |
ffff6f35 SK |
328 | let array = $1 in |
329 | let subscript = $3 in | |
330 | sprintf "get_array_subscript[%s, %s]" array subscript | |
543d3420 SK |
331 | } |
332 | ||
333 | %% |