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 | } | |
29de275c | 112 | | ID unit |
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 | } | |
154 | | LPAREN seq RPAREN | |
155 | { | |
156 | sprintf "seq[%s]" $2 | |
157 | } | |
158 | | LET decs IN seq END | |
159 | { | |
160 | let decs = $2 in | |
161 | let seq = $4 in | |
162 | sprintf "let[decs[%s], in[seq[%s]]]" decs seq | |
163 | } | |
164 | | unit | |
165 | { | |
166 | $1 | |
167 | } | |
168 | ||
169 | seq: | |
170 | | exp | |
171 | { | |
172 | sprintf "%s" $1 | |
173 | } | |
174 | | exp SEMICOLON seq | |
175 | { | |
176 | sprintf "%s; %s" $1 $3 | |
177 | } | |
178 | ||
179 | decs: | |
180 | | dec | |
181 | { | |
182 | sprintf "%s" $1 | |
183 | } | |
184 | | dec decs | |
185 | { | |
186 | sprintf "%s %s" $1 $2 | |
187 | } | |
188 | ||
189 | dec: | |
190 | | tydec {$1} | |
191 | | vardec {$1} | |
192 | | fundec {$1} | |
193 | ||
194 | fundec: | |
ffff6f35 | 195 | | FUNCTION ID unit EQ exp |
ef945634 SK |
196 | { |
197 | let id = $2 in | |
198 | let exp = $5 in | |
199 | sprintf "fundec[%s, exp[%s]]" id exp | |
200 | } | |
ffff6f35 | 201 | | FUNCTION ID LPAREN tyfields RPAREN EQ exp |
543d3420 SK |
202 | { |
203 | let id = $2 in | |
204 | let tyfields = $4 in | |
205 | let exp = $7 in | |
206 | sprintf "fundec[%s, tyfields[%s], exp[%s]]" id tyfields exp | |
207 | } | |
ffff6f35 | 208 | | FUNCTION ID LPAREN tyfields RPAREN COLON ID EQ exp |
543d3420 SK |
209 | { |
210 | let id = $2 in | |
211 | let tyfields = $4 in | |
212 | let type_id = $7 in | |
213 | let exp = $9 in | |
214 | sprintf | |
215 | "fundec[%s, tyfields[%s], type_id[%s], exp[%s]]" | |
216 | id tyfields type_id exp | |
217 | } | |
218 | ||
219 | vardec: | |
ffff6f35 | 220 | | VAR ID ASSIGN exp |
543d3420 SK |
221 | { |
222 | let id = $2 in | |
223 | let exp = $4 in | |
224 | sprintf "vardec[%s, exp[%s]]" id exp | |
225 | } | |
ffff6f35 | 226 | | VAR ID COLON ID ASSIGN exp |
543d3420 SK |
227 | { |
228 | let id = $2 in | |
ef945634 | 229 | let type_id = $4 in |
543d3420 | 230 | let exp = $6 in |
ef945634 | 231 | sprintf "vardec[%s, type_id[%s], exp[%s]]" id type_id exp |
543d3420 SK |
232 | } |
233 | ||
234 | tydec: | |
ef945634 | 235 | | TYPE ID EQ ty |
543d3420 | 236 | { |
ef945634 SK |
237 | let type_id = $2 in |
238 | let ty = $4 in | |
239 | sprintf "tydec[%s, %s]" type_id ty | |
543d3420 SK |
240 | } |
241 | ||
242 | ty: | |
ef945634 SK |
243 | | ID |
244 | { | |
245 | let type_id = $1 in | |
246 | sprintf "type[type_id[%S]]" type_id | |
247 | } | |
543d3420 SK |
248 | | LBRACE RBRACE |
249 | { | |
250 | "record[]" | |
251 | } | |
252 | | LBRACE tyfields RBRACE | |
253 | { | |
254 | let tyfields = $2 in | |
255 | sprintf "record[%s]" tyfields | |
256 | } | |
ef945634 | 257 | | ARRAY OF ID |
543d3420 SK |
258 | { |
259 | let type_id = $3 in | |
260 | sprintf "array_of_type[%s]" type_id | |
261 | } | |
262 | ||
263 | tyfields: | |
264 | /*| epsilon */ | |
265 | | tyfield | |
266 | {$1} | |
267 | | tyfield COMMA tyfields | |
268 | { | |
269 | let tyfield = $1 in | |
270 | let tyfields = $3 in | |
271 | sprintf "%s, %s" tyfield tyfields | |
272 | } | |
273 | ||
274 | tyfield: | |
ffff6f35 | 275 | | ID COLON ID |
543d3420 SK |
276 | { |
277 | let id = $1 in | |
278 | let type_id = $3 in | |
279 | sprintf "tyfield[%s, %s]" id type_id | |
280 | } | |
281 | ||
543d3420 SK |
282 | /* Perhaps "void"? */ |
283 | unit: | |
284 | | LPAREN RPAREN | |
285 | { | |
286 | "unit[]" | |
287 | } | |
288 | ||
543d3420 | 289 | rec_field_assignments: |
ffff6f35 | 290 | | ID EQ exp |
543d3420 | 291 | { |
ffff6f35 SK |
292 | let id = $1 in |
293 | let exp = $3 in | |
294 | sprintf "%S = %s" id exp | |
543d3420 | 295 | } |
ffff6f35 | 296 | | ID EQ exp COMMA rec_field_assignments |
543d3420 | 297 | { |
ffff6f35 SK |
298 | let id = $1 in |
299 | let exp = $3 in | |
300 | let rec_field_assignments = $5 in | |
301 | sprintf "%S = %s, %s" id exp rec_field_assignments | |
543d3420 SK |
302 | } |
303 | ||
543d3420 SK |
304 | fun_args: |
305 | | exp | |
306 | { | |
307 | $1 | |
308 | } | |
309 | | exp COMMA fun_args | |
310 | { | |
311 | sprintf "%s, %s" $1 $3 | |
312 | } | |
313 | ||
314 | op: | |
315 | | PLUS {"+"} | |
316 | | MINUS {"-"} | |
317 | | TIMES {"*"} | |
318 | | DIVIDE {"/"} | |
319 | | EQ {"="} | |
320 | | NEQ {"<>"} | |
321 | | GT {">"} | |
322 | | LT {"<"} | |
323 | | GE {">="} | |
324 | | LE {"<="} | |
325 | | AND {"&"} | |
326 | | OR {"|"} | |
327 | ||
328 | lvalue: | |
ffff6f35 | 329 | | ID |
543d3420 | 330 | { |
ffff6f35 SK |
331 | let id = $1 in |
332 | sprintf "lvalue[%s]" id | |
543d3420 | 333 | } |
ffff6f35 | 334 | | lvalue DOT ID |
543d3420 | 335 | { |
ffff6f35 SK |
336 | let record = $1 in |
337 | let field = $3 in | |
338 | sprintf "get_record_field[%s, %s]" record field | |
543d3420 SK |
339 | } |
340 | | lvalue LBRACK exp RBRACK | |
341 | { | |
ffff6f35 SK |
342 | let array = $1 in |
343 | let subscript = $3 in | |
344 | sprintf "get_array_subscript[%s, %s]" array subscript | |
543d3420 SK |
345 | } |
346 | ||
347 | %% |