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 */ | |
c7598faf | 52 | %nonassoc ASSIGN |
ccbe4cfc | 53 | %left OF DO |
543d3420 SK |
54 | %left OR |
55 | %left AND | |
56 | %nonassoc EQ NEQ GT LT GE LE | |
57 | %left PLUS MINUS | |
58 | %left TIMES DIVIDE | |
59 | %nonassoc UMINUS | |
60 | /* to highest precedence */ | |
61 | ||
62 | %type <string> program | |
63 | ||
64 | %start program | |
65 | ||
66 | %% | |
67 | ||
68 | program: | |
69 | | exp EOF | |
70 | { | |
71 | sprintf "program[%s]" $1 | |
72 | } | |
a0db5523 | 73 | ; |
543d3420 SK |
74 | |
75 | exp: | |
76 | | NIL | |
77 | { | |
78 | "nil[]" | |
79 | } | |
80 | | INT | |
81 | { | |
82 | sprintf "int[%d]" $1 | |
83 | } | |
84 | | MINUS exp %prec UMINUS | |
85 | { | |
86 | sprintf "negation[%s]" $2 | |
87 | } | |
ef945634 | 88 | | ID LBRACK exp RBRACK OF exp |
543d3420 | 89 | { |
ef945634 | 90 | let type_id = $1 in |
a0db5523 SK |
91 | let number_of_elements = $3 in |
92 | let initial_value = $6 in | |
93 | sprintf | |
94 | "array[type[%s], size[%s], val[%s]]" | |
95 | type_id number_of_elements initial_value | |
543d3420 | 96 | } |
ef945634 | 97 | | ID LBRACE rec_field_assignments RBRACE |
543d3420 | 98 | { |
ef945634 SK |
99 | let type_id = $1 in |
100 | let rec_field_assignments = $3 in | |
101 | sprintf | |
102 | "record[type[%s], rec_field_assignments[%s]]" | |
103 | type_id rec_field_assignments | |
543d3420 SK |
104 | } |
105 | | lvalue | |
106 | { | |
107 | $1 | |
108 | } | |
109 | | lvalue ASSIGN exp | |
110 | { | |
111 | sprintf "assign[%s := %s]" $1 $3 | |
112 | } | |
113 | | STRING | |
114 | { | |
115 | sprintf "string[%S]" $1 | |
116 | } | |
b9397ef5 | 117 | | ID LPAREN RPAREN |
543d3420 | 118 | { |
29de275c SK |
119 | let id = $1 in |
120 | sprintf "fun_call[%s, []]" id | |
121 | } | |
122 | | ID LPAREN fun_args RPAREN | |
123 | { | |
124 | let id = $1 in | |
125 | let fun_args = $3 in | |
126 | sprintf "fun_call[%s, %s]" id fun_args | |
543d3420 SK |
127 | } |
128 | | exp op exp | |
129 | { | |
130 | sprintf "op[%s %s %s]" $1 $2 $3 | |
131 | } | |
132 | | IF exp THEN exp ELSE exp | |
133 | { | |
134 | let e1 = $2 in | |
135 | let e2 = $4 in | |
136 | let e3 = $6 in | |
137 | sprintf "if_then_else[%s, then[%s], else[%s]]" e1 e2 e3 | |
138 | } | |
139 | | IF exp THEN exp | |
140 | { | |
141 | sprintf "if_then[%s, then[%s]]" $2 $4 | |
142 | } | |
143 | | WHILE exp DO exp | |
144 | { | |
145 | sprintf "while[%s, do[%s]]" $2 $4 | |
146 | } | |
ffff6f35 | 147 | | FOR ID ASSIGN exp TO exp DO exp |
543d3420 SK |
148 | { |
149 | let id = $2 in | |
150 | let e1 = $4 in | |
151 | let e2 = $6 in | |
152 | let e3 = $8 in | |
153 | sprintf "for[%s := %s, to[%s], do[%s]]" id e1 e2 e3 | |
154 | } | |
155 | | BREAK | |
156 | { | |
157 | "break[]" | |
158 | } | |
e7dfac93 | 159 | | LPAREN exps RPAREN |
543d3420 | 160 | { |
e7dfac93 | 161 | sprintf "exps[%s]" $2 |
543d3420 | 162 | } |
e7dfac93 | 163 | | LET decs IN exps END |
543d3420 SK |
164 | { |
165 | let decs = $2 in | |
e7dfac93 SK |
166 | let exps = $4 in |
167 | sprintf "let[decs[%s], in[exps[%s]]]" decs exps | |
543d3420 | 168 | } |
b9397ef5 | 169 | | LPAREN RPAREN |
543d3420 | 170 | { |
b9397ef5 SK |
171 | (* Perhaps "void"? *) |
172 | "unit[]" | |
543d3420 | 173 | } |
a0db5523 | 174 | ; |
543d3420 | 175 | |
b3c9d54d SK |
176 | rec_field_assignments: |
177 | | ID EQ exp | |
178 | { | |
179 | let id = $1 in | |
180 | let exp = $3 in | |
181 | sprintf "%S = %s" id exp | |
182 | } | |
183 | | ID EQ exp COMMA rec_field_assignments | |
184 | { | |
185 | let id = $1 in | |
186 | let exp = $3 in | |
187 | let rec_field_assignments = $5 in | |
188 | sprintf "%S = %s, %s" id exp rec_field_assignments | |
189 | } | |
a0db5523 | 190 | ; |
b3c9d54d | 191 | |
e7dfac93 | 192 | exps: |
543d3420 SK |
193 | | exp |
194 | { | |
a0db5523 SK |
195 | let exp = $1 in |
196 | sprintf "%s" exp | |
543d3420 | 197 | } |
e7dfac93 | 198 | | exp SEMICOLON exps |
543d3420 | 199 | { |
a0db5523 SK |
200 | let exp = $1 in |
201 | let exps = $3 in | |
202 | sprintf "%s; %s" exp exps | |
543d3420 | 203 | } |
a0db5523 | 204 | ; |
543d3420 SK |
205 | |
206 | decs: | |
207 | | dec | |
208 | { | |
209 | sprintf "%s" $1 | |
210 | } | |
211 | | dec decs | |
212 | { | |
213 | sprintf "%s %s" $1 $2 | |
214 | } | |
a0db5523 | 215 | ; |
543d3420 SK |
216 | |
217 | dec: | |
3fbeb7c1 SK |
218 | /* Tydec */ |
219 | | TYPE ID EQ ID | |
ef945634 | 220 | { |
3fbeb7c1 SK |
221 | let type_id_new = $2 in |
222 | let type_id_orig = $4 in | |
223 | sprintf "tydec_alias[from[%s], to[%s]]" type_id_new type_id_orig | |
ef945634 | 224 | } |
3fbeb7c1 | 225 | | TYPE ID EQ LBRACE RBRACE |
543d3420 | 226 | { |
3fbeb7c1 SK |
227 | let type_id = $2 in |
228 | sprintf "tydec_empty_record[%s]" type_id | |
543d3420 | 229 | } |
3fbeb7c1 | 230 | | TYPE ID EQ LBRACE tyfields RBRACE |
543d3420 | 231 | { |
3fbeb7c1 SK |
232 | let type_id = $2 in |
233 | let tyfields = $5 in | |
234 | sprintf "tydec_record[%s, fields[%s]]" type_id tyfields | |
235 | } | |
236 | | TYPE ID EQ ARRAY OF ID | |
237 | { | |
238 | let type_id = $2 in | |
239 | let element_type_id = $6 in | |
240 | sprintf "tydec_array[%s, elements_of_type[%s]]" type_id element_type_id | |
543d3420 SK |
241 | } |
242 | ||
3fbeb7c1 | 243 | /* Vardec */ |
ffff6f35 | 244 | | VAR ID ASSIGN exp |
543d3420 SK |
245 | { |
246 | let id = $2 in | |
247 | let exp = $4 in | |
248 | sprintf "vardec[%s, exp[%s]]" id exp | |
249 | } | |
ffff6f35 | 250 | | VAR ID COLON ID ASSIGN exp |
543d3420 SK |
251 | { |
252 | let id = $2 in | |
ef945634 | 253 | let type_id = $4 in |
543d3420 | 254 | let exp = $6 in |
ef945634 | 255 | sprintf "vardec[%s, type_id[%s], exp[%s]]" id type_id exp |
543d3420 SK |
256 | } |
257 | ||
3fbeb7c1 SK |
258 | /* Fundec */ |
259 | | FUNCTION ID LPAREN RPAREN EQ exp | |
543d3420 | 260 | { |
3fbeb7c1 SK |
261 | let id = $2 in |
262 | let exp = $6 in | |
263 | sprintf "fundec[%s, arguments[], exp[%s]]" id exp | |
543d3420 | 264 | } |
3fbeb7c1 | 265 | | FUNCTION ID LPAREN tyfields RPAREN EQ exp |
543d3420 | 266 | { |
3fbeb7c1 SK |
267 | let id = $2 in |
268 | let tyfields = $4 in | |
269 | let exp = $7 in | |
270 | sprintf "fundec[%s, arguments[%s], exp[%s]]" id tyfields exp | |
543d3420 | 271 | } |
3fbeb7c1 | 272 | | FUNCTION ID LPAREN tyfields RPAREN COLON ID EQ exp |
543d3420 | 273 | { |
3fbeb7c1 SK |
274 | let id = $2 in |
275 | let tyfields = $4 in | |
276 | let type_id = $7 in | |
277 | let exp = $9 in | |
278 | sprintf | |
279 | "fundec[%s, tyfields[%s], type_id[%s], exp[%s]]" | |
280 | id tyfields type_id exp | |
543d3420 | 281 | } |
a0db5523 | 282 | ; |
543d3420 SK |
283 | |
284 | tyfields: | |
a87678f0 | 285 | | ID COLON ID |
543d3420 | 286 | { |
a87678f0 SK |
287 | let id_1 = $1 in |
288 | let id_2 = $3 in | |
289 | sprintf "%s : %s" id_1 id_2 | |
543d3420 | 290 | } |
a87678f0 | 291 | | ID COLON ID COMMA tyfields |
543d3420 | 292 | { |
a87678f0 SK |
293 | let id_1 = $1 in |
294 | let id_2 = $3 in | |
295 | let tyfield = sprintf "%s : %s" id_1 id_2 in | |
296 | let tyfields = $5 in | |
297 | sprintf "%s, %s" tyfield tyfields | |
543d3420 | 298 | } |
a0db5523 | 299 | ; |
543d3420 | 300 | |
543d3420 SK |
301 | fun_args: |
302 | | exp | |
303 | { | |
304 | $1 | |
305 | } | |
306 | | exp COMMA fun_args | |
307 | { | |
308 | sprintf "%s, %s" $1 $3 | |
309 | } | |
a0db5523 | 310 | ; |
543d3420 SK |
311 | |
312 | op: | |
313 | | PLUS {"+"} | |
314 | | MINUS {"-"} | |
315 | | TIMES {"*"} | |
316 | | DIVIDE {"/"} | |
317 | | EQ {"="} | |
318 | | NEQ {"<>"} | |
319 | | GT {">"} | |
320 | | LT {"<"} | |
321 | | GE {">="} | |
322 | | LE {"<="} | |
323 | | AND {"&"} | |
324 | | OR {"|"} | |
a0db5523 | 325 | ; |
543d3420 SK |
326 | |
327 | lvalue: | |
a0db5523 | 328 | | ID lvalue_part |
543d3420 | 329 | { |
ffff6f35 | 330 | let id = $1 in |
a0db5523 SK |
331 | let part = $2 in |
332 | sprintf "lvalue[%s, part[%s]]" id part | |
543d3420 | 333 | } |
a0db5523 SK |
334 | ; |
335 | ||
336 | lvalue_part: | |
337 | | {"epsilon[]"} | |
338 | | lvalue_subscript {$1} | |
339 | | lvalue_field_access {$1} | |
340 | ; | |
341 | ||
342 | lvalue_subscript: | |
343 | | LBRACK exp RBRACK | |
543d3420 | 344 | { |
a0db5523 SK |
345 | let exp = $2 in |
346 | sprintf "subscript[%s]" exp | |
543d3420 | 347 | } |
a0db5523 SK |
348 | ; |
349 | ||
350 | lvalue_field_access: | |
351 | | DOT ID | |
543d3420 | 352 | { |
a0db5523 SK |
353 | let field = $2 in |
354 | sprintf "field_access[%s]" field | |
543d3420 | 355 | } |
a0db5523 | 356 | ; |
543d3420 SK |
357 | |
358 | %% |