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 */ | |
b0047ce7 | 52 | %left ELSE |
c7598faf | 53 | %nonassoc ASSIGN |
ccbe4cfc | 54 | %left OF DO |
543d3420 SK |
55 | %left OR |
56 | %left AND | |
57 | %nonassoc EQ NEQ GT LT GE LE | |
58 | %left PLUS MINUS | |
59 | %left TIMES DIVIDE | |
60 | %nonassoc UMINUS | |
61 | /* to highest precedence */ | |
62 | ||
63 | %type <string> program | |
64 | ||
65 | %start program | |
66 | ||
67 | %% | |
68 | ||
69 | program: | |
70 | | exp EOF | |
71 | { | |
72 | sprintf "program[%s]" $1 | |
73 | } | |
a0db5523 | 74 | ; |
543d3420 SK |
75 | |
76 | exp: | |
77 | | NIL | |
78 | { | |
79 | "nil[]" | |
80 | } | |
81 | | INT | |
82 | { | |
83 | sprintf "int[%d]" $1 | |
84 | } | |
85 | | MINUS exp %prec UMINUS | |
86 | { | |
87 | sprintf "negation[%s]" $2 | |
88 | } | |
ef945634 | 89 | | ID LBRACK exp RBRACK OF exp |
543d3420 | 90 | { |
ef945634 | 91 | let type_id = $1 in |
a0db5523 SK |
92 | let number_of_elements = $3 in |
93 | let initial_value = $6 in | |
94 | sprintf | |
95 | "array[type[%s], size[%s], val[%s]]" | |
96 | type_id number_of_elements initial_value | |
543d3420 | 97 | } |
ef945634 | 98 | | ID LBRACE rec_field_assignments RBRACE |
543d3420 | 99 | { |
ef945634 SK |
100 | let type_id = $1 in |
101 | let rec_field_assignments = $3 in | |
102 | sprintf | |
103 | "record[type[%s], rec_field_assignments[%s]]" | |
104 | type_id rec_field_assignments | |
543d3420 SK |
105 | } |
106 | | lvalue | |
107 | { | |
108 | $1 | |
109 | } | |
110 | | lvalue ASSIGN exp | |
111 | { | |
112 | sprintf "assign[%s := %s]" $1 $3 | |
113 | } | |
114 | | STRING | |
115 | { | |
116 | sprintf "string[%S]" $1 | |
117 | } | |
b9397ef5 | 118 | | ID LPAREN RPAREN |
543d3420 | 119 | { |
29de275c SK |
120 | let id = $1 in |
121 | sprintf "fun_call[%s, []]" id | |
122 | } | |
123 | | ID LPAREN fun_args RPAREN | |
124 | { | |
125 | let id = $1 in | |
126 | let fun_args = $3 in | |
127 | sprintf "fun_call[%s, %s]" id fun_args | |
543d3420 SK |
128 | } |
129 | | exp op exp | |
130 | { | |
131 | sprintf "op[%s %s %s]" $1 $2 $3 | |
132 | } | |
133 | | IF exp THEN exp ELSE exp | |
134 | { | |
135 | let e1 = $2 in | |
136 | let e2 = $4 in | |
137 | let e3 = $6 in | |
138 | sprintf "if_then_else[%s, then[%s], else[%s]]" e1 e2 e3 | |
139 | } | |
140 | | IF exp THEN exp | |
141 | { | |
142 | sprintf "if_then[%s, then[%s]]" $2 $4 | |
143 | } | |
144 | | WHILE exp DO exp | |
145 | { | |
146 | sprintf "while[%s, do[%s]]" $2 $4 | |
147 | } | |
ffff6f35 | 148 | | FOR ID ASSIGN exp TO exp DO exp |
543d3420 SK |
149 | { |
150 | let id = $2 in | |
151 | let e1 = $4 in | |
152 | let e2 = $6 in | |
153 | let e3 = $8 in | |
154 | sprintf "for[%s := %s, to[%s], do[%s]]" id e1 e2 e3 | |
155 | } | |
156 | | BREAK | |
157 | { | |
158 | "break[]" | |
159 | } | |
e7dfac93 | 160 | | LPAREN exps RPAREN |
543d3420 | 161 | { |
e7dfac93 | 162 | sprintf "exps[%s]" $2 |
543d3420 | 163 | } |
e7dfac93 | 164 | | LET decs IN exps END |
543d3420 SK |
165 | { |
166 | let decs = $2 in | |
e7dfac93 SK |
167 | let exps = $4 in |
168 | sprintf "let[decs[%s], in[exps[%s]]]" decs exps | |
543d3420 | 169 | } |
b9397ef5 | 170 | | LPAREN RPAREN |
543d3420 | 171 | { |
b9397ef5 SK |
172 | (* Perhaps "void"? *) |
173 | "unit[]" | |
543d3420 | 174 | } |
a0db5523 | 175 | ; |
543d3420 | 176 | |
b3c9d54d SK |
177 | rec_field_assignments: |
178 | | ID EQ exp | |
179 | { | |
180 | let id = $1 in | |
181 | let exp = $3 in | |
182 | sprintf "%S = %s" id exp | |
183 | } | |
184 | | ID EQ exp COMMA rec_field_assignments | |
185 | { | |
186 | let id = $1 in | |
187 | let exp = $3 in | |
188 | let rec_field_assignments = $5 in | |
189 | sprintf "%S = %s, %s" id exp rec_field_assignments | |
190 | } | |
a0db5523 | 191 | ; |
b3c9d54d | 192 | |
e7dfac93 | 193 | exps: |
543d3420 SK |
194 | | exp |
195 | { | |
a0db5523 SK |
196 | let exp = $1 in |
197 | sprintf "%s" exp | |
543d3420 | 198 | } |
e7dfac93 | 199 | | exp SEMICOLON exps |
543d3420 | 200 | { |
a0db5523 SK |
201 | let exp = $1 in |
202 | let exps = $3 in | |
203 | sprintf "%s; %s" exp exps | |
543d3420 | 204 | } |
a0db5523 | 205 | ; |
543d3420 SK |
206 | |
207 | decs: | |
208 | | dec | |
209 | { | |
210 | sprintf "%s" $1 | |
211 | } | |
212 | | dec decs | |
213 | { | |
214 | sprintf "%s %s" $1 $2 | |
215 | } | |
a0db5523 | 216 | ; |
543d3420 SK |
217 | |
218 | dec: | |
3fbeb7c1 SK |
219 | /* Tydec */ |
220 | | TYPE ID EQ ID | |
ef945634 | 221 | { |
3fbeb7c1 SK |
222 | let type_id_new = $2 in |
223 | let type_id_orig = $4 in | |
224 | sprintf "tydec_alias[from[%s], to[%s]]" type_id_new type_id_orig | |
ef945634 | 225 | } |
3fbeb7c1 | 226 | | TYPE ID EQ LBRACE RBRACE |
543d3420 | 227 | { |
3fbeb7c1 SK |
228 | let type_id = $2 in |
229 | sprintf "tydec_empty_record[%s]" type_id | |
543d3420 | 230 | } |
3fbeb7c1 | 231 | | TYPE ID EQ LBRACE tyfields RBRACE |
543d3420 | 232 | { |
3fbeb7c1 SK |
233 | let type_id = $2 in |
234 | let tyfields = $5 in | |
235 | sprintf "tydec_record[%s, fields[%s]]" type_id tyfields | |
236 | } | |
237 | | TYPE ID EQ ARRAY OF ID | |
238 | { | |
239 | let type_id = $2 in | |
240 | let element_type_id = $6 in | |
241 | sprintf "tydec_array[%s, elements_of_type[%s]]" type_id element_type_id | |
543d3420 SK |
242 | } |
243 | ||
3fbeb7c1 | 244 | /* Vardec */ |
ffff6f35 | 245 | | VAR ID ASSIGN exp |
543d3420 SK |
246 | { |
247 | let id = $2 in | |
248 | let exp = $4 in | |
249 | sprintf "vardec[%s, exp[%s]]" id exp | |
250 | } | |
ffff6f35 | 251 | | VAR ID COLON ID ASSIGN exp |
543d3420 SK |
252 | { |
253 | let id = $2 in | |
ef945634 | 254 | let type_id = $4 in |
543d3420 | 255 | let exp = $6 in |
ef945634 | 256 | sprintf "vardec[%s, type_id[%s], exp[%s]]" id type_id exp |
543d3420 SK |
257 | } |
258 | ||
3fbeb7c1 SK |
259 | /* Fundec */ |
260 | | FUNCTION ID LPAREN RPAREN EQ exp | |
543d3420 | 261 | { |
3fbeb7c1 SK |
262 | let id = $2 in |
263 | let exp = $6 in | |
264 | sprintf "fundec[%s, arguments[], exp[%s]]" id exp | |
543d3420 | 265 | } |
3fbeb7c1 | 266 | | FUNCTION ID LPAREN tyfields RPAREN EQ exp |
543d3420 | 267 | { |
3fbeb7c1 SK |
268 | let id = $2 in |
269 | let tyfields = $4 in | |
270 | let exp = $7 in | |
271 | sprintf "fundec[%s, arguments[%s], exp[%s]]" id tyfields exp | |
543d3420 | 272 | } |
3fbeb7c1 | 273 | | FUNCTION ID LPAREN tyfields RPAREN COLON ID EQ exp |
543d3420 | 274 | { |
3fbeb7c1 SK |
275 | let id = $2 in |
276 | let tyfields = $4 in | |
277 | let type_id = $7 in | |
278 | let exp = $9 in | |
279 | sprintf | |
280 | "fundec[%s, tyfields[%s], type_id[%s], exp[%s]]" | |
281 | id tyfields type_id exp | |
543d3420 | 282 | } |
a0db5523 | 283 | ; |
543d3420 SK |
284 | |
285 | tyfields: | |
a87678f0 | 286 | | ID COLON ID |
543d3420 | 287 | { |
a87678f0 SK |
288 | let id_1 = $1 in |
289 | let id_2 = $3 in | |
290 | sprintf "%s : %s" id_1 id_2 | |
543d3420 | 291 | } |
a87678f0 | 292 | | ID COLON ID COMMA tyfields |
543d3420 | 293 | { |
a87678f0 SK |
294 | let id_1 = $1 in |
295 | let id_2 = $3 in | |
296 | let tyfield = sprintf "%s : %s" id_1 id_2 in | |
297 | let tyfields = $5 in | |
298 | sprintf "%s, %s" tyfield tyfields | |
543d3420 | 299 | } |
a0db5523 | 300 | ; |
543d3420 | 301 | |
543d3420 SK |
302 | fun_args: |
303 | | exp | |
304 | { | |
305 | $1 | |
306 | } | |
307 | | exp COMMA fun_args | |
308 | { | |
309 | sprintf "%s, %s" $1 $3 | |
310 | } | |
a0db5523 | 311 | ; |
543d3420 SK |
312 | |
313 | op: | |
314 | | PLUS {"+"} | |
315 | | MINUS {"-"} | |
316 | | TIMES {"*"} | |
317 | | DIVIDE {"/"} | |
318 | | EQ {"="} | |
319 | | NEQ {"<>"} | |
320 | | GT {">"} | |
321 | | LT {"<"} | |
322 | | GE {">="} | |
323 | | LE {"<="} | |
324 | | AND {"&"} | |
325 | | OR {"|"} | |
a0db5523 | 326 | ; |
543d3420 SK |
327 | |
328 | lvalue: | |
a0db5523 | 329 | | ID lvalue_part |
543d3420 | 330 | { |
ffff6f35 | 331 | let id = $1 in |
a0db5523 SK |
332 | let part = $2 in |
333 | sprintf "lvalue[%s, part[%s]]" id part | |
543d3420 | 334 | } |
a0db5523 SK |
335 | ; |
336 | ||
337 | lvalue_part: | |
338 | | {"epsilon[]"} | |
339 | | lvalue_subscript {$1} | |
340 | | lvalue_field_access {$1} | |
341 | ; | |
342 | ||
343 | lvalue_subscript: | |
344 | | LBRACK exp RBRACK | |
543d3420 | 345 | { |
a0db5523 SK |
346 | let exp = $2 in |
347 | sprintf "subscript[%s]" exp | |
543d3420 | 348 | } |
a0db5523 SK |
349 | ; |
350 | ||
351 | lvalue_field_access: | |
352 | | DOT ID | |
543d3420 | 353 | { |
a0db5523 SK |
354 | let field = $2 in |
355 | sprintf "field_access[%s]" field | |
543d3420 | 356 | } |
a0db5523 | 357 | ; |
543d3420 SK |
358 | |
359 | %% |