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 */ | |
7c9381cf | 52 | %left THEN |
b0047ce7 | 53 | %left ELSE |
c7598faf | 54 | %nonassoc ASSIGN |
ccbe4cfc | 55 | %left OF DO |
543d3420 SK |
56 | %left OR |
57 | %left AND | |
58 | %nonassoc EQ NEQ GT LT GE LE | |
59 | %left PLUS MINUS | |
60 | %left TIMES DIVIDE | |
61 | %nonassoc UMINUS | |
62 | /* to highest precedence */ | |
63 | ||
64 | %type <string> program | |
65 | ||
66 | %start program | |
67 | ||
68 | %% | |
69 | ||
70 | program: | |
71 | | exp EOF | |
72 | { | |
73 | sprintf "program[%s]" $1 | |
74 | } | |
a0db5523 | 75 | ; |
543d3420 SK |
76 | |
77 | exp: | |
78 | | NIL | |
79 | { | |
80 | "nil[]" | |
81 | } | |
82 | | INT | |
83 | { | |
84 | sprintf "int[%d]" $1 | |
85 | } | |
86 | | MINUS exp %prec UMINUS | |
87 | { | |
88 | sprintf "negation[%s]" $2 | |
89 | } | |
ef945634 | 90 | | ID LBRACK exp RBRACK OF exp |
543d3420 | 91 | { |
ef945634 | 92 | let type_id = $1 in |
a0db5523 SK |
93 | let number_of_elements = $3 in |
94 | let initial_value = $6 in | |
95 | sprintf | |
96 | "array[type[%s], size[%s], val[%s]]" | |
97 | type_id number_of_elements initial_value | |
543d3420 | 98 | } |
ef945634 | 99 | | ID LBRACE rec_field_assignments RBRACE |
543d3420 | 100 | { |
ef945634 SK |
101 | let type_id = $1 in |
102 | let rec_field_assignments = $3 in | |
103 | sprintf | |
104 | "record[type[%s], rec_field_assignments[%s]]" | |
105 | type_id rec_field_assignments | |
543d3420 SK |
106 | } |
107 | | lvalue | |
108 | { | |
109 | $1 | |
110 | } | |
111 | | lvalue ASSIGN exp | |
112 | { | |
113 | sprintf "assign[%s := %s]" $1 $3 | |
114 | } | |
115 | | STRING | |
116 | { | |
117 | sprintf "string[%S]" $1 | |
118 | } | |
b9397ef5 | 119 | | ID LPAREN RPAREN |
543d3420 | 120 | { |
29de275c SK |
121 | let id = $1 in |
122 | sprintf "fun_call[%s, []]" id | |
123 | } | |
124 | | ID LPAREN fun_args RPAREN | |
125 | { | |
126 | let id = $1 in | |
127 | let fun_args = $3 in | |
128 | sprintf "fun_call[%s, %s]" id fun_args | |
543d3420 SK |
129 | } |
130 | | exp op exp | |
131 | { | |
132 | sprintf "op[%s %s %s]" $1 $2 $3 | |
133 | } | |
134 | | IF exp THEN exp ELSE exp | |
135 | { | |
136 | let e1 = $2 in | |
137 | let e2 = $4 in | |
138 | let e3 = $6 in | |
139 | sprintf "if_then_else[%s, then[%s], else[%s]]" e1 e2 e3 | |
140 | } | |
141 | | IF exp THEN exp | |
142 | { | |
143 | sprintf "if_then[%s, then[%s]]" $2 $4 | |
144 | } | |
145 | | WHILE exp DO exp | |
146 | { | |
147 | sprintf "while[%s, do[%s]]" $2 $4 | |
148 | } | |
ffff6f35 | 149 | | FOR ID ASSIGN exp TO exp DO exp |
543d3420 SK |
150 | { |
151 | let id = $2 in | |
152 | let e1 = $4 in | |
153 | let e2 = $6 in | |
154 | let e3 = $8 in | |
155 | sprintf "for[%s := %s, to[%s], do[%s]]" id e1 e2 e3 | |
156 | } | |
157 | | BREAK | |
158 | { | |
159 | "break[]" | |
160 | } | |
e7dfac93 | 161 | | LPAREN exps RPAREN |
543d3420 | 162 | { |
e7dfac93 | 163 | sprintf "exps[%s]" $2 |
543d3420 | 164 | } |
e7dfac93 | 165 | | LET decs IN exps END |
543d3420 SK |
166 | { |
167 | let decs = $2 in | |
e7dfac93 SK |
168 | let exps = $4 in |
169 | sprintf "let[decs[%s], in[exps[%s]]]" decs exps | |
543d3420 | 170 | } |
b9397ef5 | 171 | | LPAREN RPAREN |
543d3420 | 172 | { |
b9397ef5 SK |
173 | (* Perhaps "void"? *) |
174 | "unit[]" | |
543d3420 | 175 | } |
a0db5523 | 176 | ; |
543d3420 | 177 | |
b3c9d54d SK |
178 | rec_field_assignments: |
179 | | ID EQ exp | |
180 | { | |
181 | let id = $1 in | |
182 | let exp = $3 in | |
183 | sprintf "%S = %s" id exp | |
184 | } | |
185 | | ID EQ exp COMMA rec_field_assignments | |
186 | { | |
187 | let id = $1 in | |
188 | let exp = $3 in | |
189 | let rec_field_assignments = $5 in | |
190 | sprintf "%S = %s, %s" id exp rec_field_assignments | |
191 | } | |
a0db5523 | 192 | ; |
b3c9d54d | 193 | |
e7dfac93 | 194 | exps: |
543d3420 SK |
195 | | exp |
196 | { | |
a0db5523 SK |
197 | let exp = $1 in |
198 | sprintf "%s" exp | |
543d3420 | 199 | } |
e7dfac93 | 200 | | exp SEMICOLON exps |
543d3420 | 201 | { |
a0db5523 SK |
202 | let exp = $1 in |
203 | let exps = $3 in | |
204 | sprintf "%s; %s" exp exps | |
543d3420 | 205 | } |
a0db5523 | 206 | ; |
543d3420 SK |
207 | |
208 | decs: | |
209 | | dec | |
210 | { | |
211 | sprintf "%s" $1 | |
212 | } | |
213 | | dec decs | |
214 | { | |
215 | sprintf "%s %s" $1 $2 | |
216 | } | |
a0db5523 | 217 | ; |
543d3420 SK |
218 | |
219 | dec: | |
3fbeb7c1 SK |
220 | /* Tydec */ |
221 | | TYPE ID EQ ID | |
ef945634 | 222 | { |
3fbeb7c1 SK |
223 | let type_id_new = $2 in |
224 | let type_id_orig = $4 in | |
225 | sprintf "tydec_alias[from[%s], to[%s]]" type_id_new type_id_orig | |
ef945634 | 226 | } |
3fbeb7c1 | 227 | | TYPE ID EQ LBRACE RBRACE |
543d3420 | 228 | { |
3fbeb7c1 SK |
229 | let type_id = $2 in |
230 | sprintf "tydec_empty_record[%s]" type_id | |
543d3420 | 231 | } |
3fbeb7c1 | 232 | | TYPE ID EQ LBRACE tyfields RBRACE |
543d3420 | 233 | { |
3fbeb7c1 SK |
234 | let type_id = $2 in |
235 | let tyfields = $5 in | |
236 | sprintf "tydec_record[%s, fields[%s]]" type_id tyfields | |
237 | } | |
238 | | TYPE ID EQ ARRAY OF ID | |
239 | { | |
240 | let type_id = $2 in | |
241 | let element_type_id = $6 in | |
242 | sprintf "tydec_array[%s, elements_of_type[%s]]" type_id element_type_id | |
543d3420 SK |
243 | } |
244 | ||
3fbeb7c1 | 245 | /* Vardec */ |
ffff6f35 | 246 | | VAR ID ASSIGN exp |
543d3420 SK |
247 | { |
248 | let id = $2 in | |
249 | let exp = $4 in | |
250 | sprintf "vardec[%s, exp[%s]]" id exp | |
251 | } | |
ffff6f35 | 252 | | VAR ID COLON ID ASSIGN exp |
543d3420 SK |
253 | { |
254 | let id = $2 in | |
ef945634 | 255 | let type_id = $4 in |
543d3420 | 256 | let exp = $6 in |
ef945634 | 257 | sprintf "vardec[%s, type_id[%s], exp[%s]]" id type_id exp |
543d3420 SK |
258 | } |
259 | ||
3fbeb7c1 SK |
260 | /* Fundec */ |
261 | | FUNCTION ID LPAREN RPAREN EQ exp | |
543d3420 | 262 | { |
3fbeb7c1 SK |
263 | let id = $2 in |
264 | let exp = $6 in | |
265 | sprintf "fundec[%s, arguments[], exp[%s]]" id exp | |
543d3420 | 266 | } |
3fbeb7c1 | 267 | | FUNCTION ID LPAREN tyfields RPAREN EQ exp |
543d3420 | 268 | { |
3fbeb7c1 SK |
269 | let id = $2 in |
270 | let tyfields = $4 in | |
271 | let exp = $7 in | |
272 | sprintf "fundec[%s, arguments[%s], exp[%s]]" id tyfields exp | |
543d3420 | 273 | } |
3fbeb7c1 | 274 | | FUNCTION ID LPAREN tyfields RPAREN COLON ID EQ exp |
543d3420 | 275 | { |
3fbeb7c1 SK |
276 | let id = $2 in |
277 | let tyfields = $4 in | |
278 | let type_id = $7 in | |
279 | let exp = $9 in | |
280 | sprintf | |
281 | "fundec[%s, tyfields[%s], type_id[%s], exp[%s]]" | |
282 | id tyfields type_id exp | |
543d3420 | 283 | } |
a0db5523 | 284 | ; |
543d3420 SK |
285 | |
286 | tyfields: | |
a87678f0 | 287 | | ID COLON ID |
543d3420 | 288 | { |
a87678f0 SK |
289 | let id_1 = $1 in |
290 | let id_2 = $3 in | |
291 | sprintf "%s : %s" id_1 id_2 | |
543d3420 | 292 | } |
a87678f0 | 293 | | ID COLON ID COMMA tyfields |
543d3420 | 294 | { |
a87678f0 SK |
295 | let id_1 = $1 in |
296 | let id_2 = $3 in | |
297 | let tyfield = sprintf "%s : %s" id_1 id_2 in | |
298 | let tyfields = $5 in | |
299 | sprintf "%s, %s" tyfield tyfields | |
543d3420 | 300 | } |
a0db5523 | 301 | ; |
543d3420 | 302 | |
543d3420 SK |
303 | fun_args: |
304 | | exp | |
305 | { | |
306 | $1 | |
307 | } | |
308 | | exp COMMA fun_args | |
309 | { | |
310 | sprintf "%s, %s" $1 $3 | |
311 | } | |
a0db5523 | 312 | ; |
543d3420 SK |
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 {"|"} | |
a0db5523 | 327 | ; |
543d3420 SK |
328 | |
329 | lvalue: | |
a0db5523 | 330 | | ID lvalue_part |
543d3420 | 331 | { |
ffff6f35 | 332 | let id = $1 in |
a0db5523 SK |
333 | let part = $2 in |
334 | sprintf "lvalue[%s, part[%s]]" id part | |
543d3420 | 335 | } |
a0db5523 SK |
336 | ; |
337 | ||
338 | lvalue_part: | |
339 | | {"epsilon[]"} | |
340 | | lvalue_subscript {$1} | |
341 | | lvalue_field_access {$1} | |
342 | ; | |
343 | ||
344 | lvalue_subscript: | |
345 | | LBRACK exp RBRACK | |
543d3420 | 346 | { |
a0db5523 SK |
347 | let exp = $2 in |
348 | sprintf "subscript[%s]" exp | |
543d3420 | 349 | } |
a0db5523 SK |
350 | ; |
351 | ||
352 | lvalue_field_access: | |
353 | | DOT ID | |
543d3420 | 354 | { |
a0db5523 SK |
355 | let field = $2 in |
356 | sprintf "field_access[%s]" field | |
543d3420 | 357 | } |
a0db5523 | 358 | ; |
543d3420 SK |
359 | |
360 | %% |