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 */ | |
ccbe4cfc | 52 | %left OF DO |
543d3420 SK |
53 | %left OR |
54 | %left AND | |
55 | %nonassoc EQ NEQ GT LT GE LE | |
56 | %left PLUS MINUS | |
57 | %left TIMES DIVIDE | |
58 | %nonassoc UMINUS | |
59 | /* to highest precedence */ | |
60 | ||
61 | %type <string> program | |
62 | ||
63 | %start program | |
64 | ||
65 | %% | |
66 | ||
67 | program: | |
68 | | exp EOF | |
69 | { | |
70 | sprintf "program[%s]" $1 | |
71 | } | |
a0db5523 | 72 | ; |
543d3420 SK |
73 | |
74 | exp: | |
75 | | NIL | |
76 | { | |
77 | "nil[]" | |
78 | } | |
79 | | INT | |
80 | { | |
81 | sprintf "int[%d]" $1 | |
82 | } | |
83 | | MINUS exp %prec UMINUS | |
84 | { | |
85 | sprintf "negation[%s]" $2 | |
86 | } | |
ef945634 | 87 | | ID LBRACK exp RBRACK OF exp |
543d3420 | 88 | { |
ef945634 | 89 | let type_id = $1 in |
a0db5523 SK |
90 | let number_of_elements = $3 in |
91 | let initial_value = $6 in | |
92 | sprintf | |
93 | "array[type[%s], size[%s], val[%s]]" | |
94 | type_id number_of_elements initial_value | |
543d3420 | 95 | } |
ef945634 | 96 | | ID LBRACE rec_field_assignments RBRACE |
543d3420 | 97 | { |
ef945634 SK |
98 | let type_id = $1 in |
99 | let rec_field_assignments = $3 in | |
100 | sprintf | |
101 | "record[type[%s], rec_field_assignments[%s]]" | |
102 | type_id rec_field_assignments | |
543d3420 SK |
103 | } |
104 | | lvalue | |
105 | { | |
106 | $1 | |
107 | } | |
108 | | lvalue ASSIGN exp | |
109 | { | |
110 | sprintf "assign[%s := %s]" $1 $3 | |
111 | } | |
112 | | STRING | |
113 | { | |
114 | sprintf "string[%S]" $1 | |
115 | } | |
b9397ef5 | 116 | | ID LPAREN RPAREN |
543d3420 | 117 | { |
29de275c SK |
118 | let id = $1 in |
119 | sprintf "fun_call[%s, []]" id | |
120 | } | |
121 | | ID LPAREN fun_args RPAREN | |
122 | { | |
123 | let id = $1 in | |
124 | let fun_args = $3 in | |
125 | sprintf "fun_call[%s, %s]" id fun_args | |
543d3420 SK |
126 | } |
127 | | exp op exp | |
128 | { | |
129 | sprintf "op[%s %s %s]" $1 $2 $3 | |
130 | } | |
131 | | IF exp THEN exp ELSE exp | |
132 | { | |
133 | let e1 = $2 in | |
134 | let e2 = $4 in | |
135 | let e3 = $6 in | |
136 | sprintf "if_then_else[%s, then[%s], else[%s]]" e1 e2 e3 | |
137 | } | |
138 | | IF exp THEN exp | |
139 | { | |
140 | sprintf "if_then[%s, then[%s]]" $2 $4 | |
141 | } | |
142 | | WHILE exp DO exp | |
143 | { | |
144 | sprintf "while[%s, do[%s]]" $2 $4 | |
145 | } | |
ffff6f35 | 146 | | FOR ID ASSIGN exp TO exp DO exp |
543d3420 SK |
147 | { |
148 | let id = $2 in | |
149 | let e1 = $4 in | |
150 | let e2 = $6 in | |
151 | let e3 = $8 in | |
152 | sprintf "for[%s := %s, to[%s], do[%s]]" id e1 e2 e3 | |
153 | } | |
154 | | BREAK | |
155 | { | |
156 | "break[]" | |
157 | } | |
e7dfac93 | 158 | | LPAREN exps RPAREN |
543d3420 | 159 | { |
e7dfac93 | 160 | sprintf "exps[%s]" $2 |
543d3420 | 161 | } |
e7dfac93 | 162 | | LET decs IN exps END |
543d3420 SK |
163 | { |
164 | let decs = $2 in | |
e7dfac93 SK |
165 | let exps = $4 in |
166 | sprintf "let[decs[%s], in[exps[%s]]]" decs exps | |
543d3420 | 167 | } |
b9397ef5 | 168 | | LPAREN RPAREN |
543d3420 | 169 | { |
b9397ef5 SK |
170 | (* Perhaps "void"? *) |
171 | "unit[]" | |
543d3420 | 172 | } |
a0db5523 | 173 | ; |
543d3420 | 174 | |
b3c9d54d SK |
175 | rec_field_assignments: |
176 | | ID EQ exp | |
177 | { | |
178 | let id = $1 in | |
179 | let exp = $3 in | |
180 | sprintf "%S = %s" id exp | |
181 | } | |
182 | | ID EQ exp COMMA rec_field_assignments | |
183 | { | |
184 | let id = $1 in | |
185 | let exp = $3 in | |
186 | let rec_field_assignments = $5 in | |
187 | sprintf "%S = %s, %s" id exp rec_field_assignments | |
188 | } | |
a0db5523 | 189 | ; |
b3c9d54d | 190 | |
e7dfac93 | 191 | exps: |
543d3420 SK |
192 | | exp |
193 | { | |
a0db5523 SK |
194 | let exp = $1 in |
195 | sprintf "%s" exp | |
543d3420 | 196 | } |
e7dfac93 | 197 | | exp SEMICOLON exps |
543d3420 | 198 | { |
a0db5523 SK |
199 | let exp = $1 in |
200 | let exps = $3 in | |
201 | sprintf "%s; %s" exp exps | |
543d3420 | 202 | } |
a0db5523 | 203 | ; |
543d3420 SK |
204 | |
205 | decs: | |
206 | | dec | |
207 | { | |
208 | sprintf "%s" $1 | |
209 | } | |
210 | | dec decs | |
211 | { | |
212 | sprintf "%s %s" $1 $2 | |
213 | } | |
a0db5523 | 214 | ; |
543d3420 SK |
215 | |
216 | dec: | |
3fbeb7c1 SK |
217 | /* Tydec */ |
218 | | TYPE ID EQ ID | |
ef945634 | 219 | { |
3fbeb7c1 SK |
220 | let type_id_new = $2 in |
221 | let type_id_orig = $4 in | |
222 | sprintf "tydec_alias[from[%s], to[%s]]" type_id_new type_id_orig | |
ef945634 | 223 | } |
3fbeb7c1 | 224 | | TYPE ID EQ LBRACE RBRACE |
543d3420 | 225 | { |
3fbeb7c1 SK |
226 | let type_id = $2 in |
227 | sprintf "tydec_empty_record[%s]" type_id | |
543d3420 | 228 | } |
3fbeb7c1 | 229 | | TYPE ID EQ LBRACE tyfields RBRACE |
543d3420 | 230 | { |
3fbeb7c1 SK |
231 | let type_id = $2 in |
232 | let tyfields = $5 in | |
233 | sprintf "tydec_record[%s, fields[%s]]" type_id tyfields | |
234 | } | |
235 | | TYPE ID EQ ARRAY OF ID | |
236 | { | |
237 | let type_id = $2 in | |
238 | let element_type_id = $6 in | |
239 | sprintf "tydec_array[%s, elements_of_type[%s]]" type_id element_type_id | |
543d3420 SK |
240 | } |
241 | ||
3fbeb7c1 | 242 | /* Vardec */ |
ffff6f35 | 243 | | VAR ID ASSIGN exp |
543d3420 SK |
244 | { |
245 | let id = $2 in | |
246 | let exp = $4 in | |
247 | sprintf "vardec[%s, exp[%s]]" id exp | |
248 | } | |
ffff6f35 | 249 | | VAR ID COLON ID ASSIGN exp |
543d3420 SK |
250 | { |
251 | let id = $2 in | |
ef945634 | 252 | let type_id = $4 in |
543d3420 | 253 | let exp = $6 in |
ef945634 | 254 | sprintf "vardec[%s, type_id[%s], exp[%s]]" id type_id exp |
543d3420 SK |
255 | } |
256 | ||
3fbeb7c1 SK |
257 | /* Fundec */ |
258 | | FUNCTION ID LPAREN RPAREN EQ exp | |
543d3420 | 259 | { |
3fbeb7c1 SK |
260 | let id = $2 in |
261 | let exp = $6 in | |
262 | sprintf "fundec[%s, arguments[], exp[%s]]" id exp | |
543d3420 | 263 | } |
3fbeb7c1 | 264 | | FUNCTION ID LPAREN tyfields RPAREN EQ exp |
543d3420 | 265 | { |
3fbeb7c1 SK |
266 | let id = $2 in |
267 | let tyfields = $4 in | |
268 | let exp = $7 in | |
269 | sprintf "fundec[%s, arguments[%s], exp[%s]]" id tyfields exp | |
543d3420 | 270 | } |
3fbeb7c1 | 271 | | FUNCTION ID LPAREN tyfields RPAREN COLON ID EQ exp |
543d3420 | 272 | { |
3fbeb7c1 SK |
273 | let id = $2 in |
274 | let tyfields = $4 in | |
275 | let type_id = $7 in | |
276 | let exp = $9 in | |
277 | sprintf | |
278 | "fundec[%s, tyfields[%s], type_id[%s], exp[%s]]" | |
279 | id tyfields type_id exp | |
543d3420 | 280 | } |
a0db5523 | 281 | ; |
543d3420 SK |
282 | |
283 | tyfields: | |
a87678f0 | 284 | | ID COLON ID |
543d3420 | 285 | { |
a87678f0 SK |
286 | let id_1 = $1 in |
287 | let id_2 = $3 in | |
288 | sprintf "%s : %s" id_1 id_2 | |
543d3420 | 289 | } |
a87678f0 | 290 | | ID COLON ID COMMA tyfields |
543d3420 | 291 | { |
a87678f0 SK |
292 | let id_1 = $1 in |
293 | let id_2 = $3 in | |
294 | let tyfield = sprintf "%s : %s" id_1 id_2 in | |
295 | let tyfields = $5 in | |
296 | sprintf "%s, %s" tyfield tyfields | |
543d3420 | 297 | } |
a0db5523 | 298 | ; |
543d3420 | 299 | |
543d3420 SK |
300 | fun_args: |
301 | | exp | |
302 | { | |
303 | $1 | |
304 | } | |
305 | | exp COMMA fun_args | |
306 | { | |
307 | sprintf "%s, %s" $1 $3 | |
308 | } | |
a0db5523 | 309 | ; |
543d3420 SK |
310 | |
311 | op: | |
312 | | PLUS {"+"} | |
313 | | MINUS {"-"} | |
314 | | TIMES {"*"} | |
315 | | DIVIDE {"/"} | |
316 | | EQ {"="} | |
317 | | NEQ {"<>"} | |
318 | | GT {">"} | |
319 | | LT {"<"} | |
320 | | GE {">="} | |
321 | | LE {"<="} | |
322 | | AND {"&"} | |
323 | | OR {"|"} | |
a0db5523 | 324 | ; |
543d3420 SK |
325 | |
326 | lvalue: | |
a0db5523 | 327 | | ID lvalue_part |
543d3420 | 328 | { |
ffff6f35 | 329 | let id = $1 in |
a0db5523 SK |
330 | let part = $2 in |
331 | sprintf "lvalue[%s, part[%s]]" id part | |
543d3420 | 332 | } |
a0db5523 SK |
333 | ; |
334 | ||
335 | lvalue_part: | |
336 | | {"epsilon[]"} | |
337 | | lvalue_subscript {$1} | |
338 | | lvalue_field_access {$1} | |
339 | ; | |
340 | ||
341 | lvalue_subscript: | |
342 | | LBRACK exp RBRACK | |
543d3420 | 343 | { |
a0db5523 SK |
344 | let exp = $2 in |
345 | sprintf "subscript[%s]" exp | |
543d3420 | 346 | } |
a0db5523 SK |
347 | ; |
348 | ||
349 | lvalue_field_access: | |
350 | | DOT ID | |
543d3420 | 351 | { |
a0db5523 SK |
352 | let field = $2 in |
353 | sprintf "field_access[%s]" field | |
543d3420 | 354 | } |
a0db5523 | 355 | ; |
543d3420 SK |
356 | |
357 | %% |