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