9 static const char *binop_str
[] = {
10 [binor
] = "||", [binand
] = "&&", [eq
] = "==", [neq
] = "!=",
11 [leq
] = "<=", [le
] = "<", [geq
] = ">=", [ge
] = ">", [cons
] = ":",
12 [plus
] = "+", [minus
] = "-", [times
] = "*", [divide
] = "/",
13 [modulo
] = "%", [power
] = "^",
15 static const char *fieldspec_str
[] = {
16 [fst
] = "fst", [snd
] = "snd", [hd
] = "hd", [tl
] = "tl"};
17 static const char *unop_str
[] = { [inverse
] = "!", [negate
] = "-", };
18 static const char *basictype_str
[] = {
19 [btbool
] = "Bool", [btchar
] = "Char", [btint
] = "Int",
23 struct ast
*ast(struct list
*decls
)
25 struct ast
*res
= safe_malloc(sizeof(struct ast
));
26 res
->decls
= (struct decl
**)list_to_array(decls
, &res
->ndecls
, true);
30 struct vardecl
*vardecl(struct type
*type
, char *ident
, struct expr
*expr
)
32 struct vardecl
*res
= safe_malloc(sizeof(struct vardecl
));
39 struct decl
*decl_fun(char *ident
, struct list
*args
, struct list
*atypes
,
40 struct type
*rtype
, struct list
*vars
, struct list
*body
)
42 struct decl
*res
= safe_malloc(sizeof(struct decl
));
44 res
->data
.dfun
.ident
= ident
;
45 res
->data
.dfun
.args
= (char **)
46 list_to_array(args
, &res
->data
.dfun
.nargs
, true);
47 res
->data
.dfun
.atypes
= (struct type
**)
48 list_to_array(atypes
, &res
->data
.dfun
.natypes
, true);
49 res
->data
.dfun
.rtype
= rtype
;
50 res
->data
.dfun
.vars
= (struct vardecl
**)
51 list_to_array(vars
, &res
->data
.dfun
.nvar
, true);
52 res
->data
.dfun
.body
= (struct stmt
**)
53 list_to_array(body
, &res
->data
.dfun
.nbody
, true);
57 struct decl
*decl_var(struct vardecl
*vardecl
)
59 struct decl
*res
= safe_malloc(sizeof(struct decl
));
61 res
->data
.dvar
= vardecl
;
65 struct stmt
*stmt_assign(char *ident
, struct list
*fields
, struct expr
*expr
)
67 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
69 res
->data
.sassign
.ident
= ident
;
70 res
->data
.sassign
.fields
= (char **)
71 list_to_array(fields
, &res
->data
.sassign
.nfield
, true);
72 res
->data
.sassign
.expr
= expr
;
76 struct stmt
*stmt_if(struct expr
*pred
, struct list
*then
, struct list
*els
)
78 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
80 res
->data
.sif
.pred
= pred
;
81 res
->data
.sif
.then
= (struct stmt
**)
82 list_to_array(then
, &res
->data
.sif
.nthen
, true);
83 res
->data
.sif
.els
= (struct stmt
**)
84 list_to_array(els
, &res
->data
.sif
.nels
, true);
88 struct stmt
*stmt_return(struct expr
*rtrn
)
90 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
92 res
->data
.sreturn
= rtrn
;
96 struct stmt
*stmt_expr(struct expr
*expr
)
98 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
100 res
->data
.sexpr
= expr
;
104 struct stmt
*stmt_vardecl(struct vardecl
*vardecl
)
106 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
107 res
->type
= svardecl
;
108 res
->data
.svardecl
= vardecl
;
112 struct stmt
*stmt_while(struct expr
*pred
, struct list
*body
)
114 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
116 res
->data
.swhile
.pred
= pred
;
117 res
->data
.swhile
.body
= (struct stmt
**)
118 list_to_array(body
, &res
->data
.swhile
.nbody
, true);
122 struct expr
*expr_binop(struct expr
*l
, enum binop op
, struct expr
*r
)
124 struct expr
*res
= safe_malloc(sizeof(struct expr
));
126 res
->data
.ebinop
.l
= l
;
127 res
->data
.ebinop
.op
= op
;
128 res
->data
.ebinop
.r
= r
;
132 struct expr
*expr_bool(bool b
)
134 struct expr
*res
= safe_malloc(sizeof(struct expr
));
140 struct expr
*expr_char(char *c
)
142 struct expr
*res
= safe_malloc(sizeof(struct expr
));
144 res
->data
.echar
= unescape_char(c
)[0];
148 static void set_fields(enum fieldspec
**farray
, int *n
, struct list
*fields
)
150 void **els
= list_to_array(fields
, n
, true);
151 *farray
= (enum fieldspec
*)safe_malloc(*n
*sizeof(enum fieldspec
));
152 for (int i
= 0; i
<*n
; i
++) {
154 if (strcmp(t
, "fst") == 0)
156 else if (strcmp(t
, "snd") == 0)
158 else if (strcmp(t
, "hd") == 0)
160 else if (strcmp(t
, "tl") == 0)
168 struct expr
*expr_funcall(char *ident
, struct list
*args
, struct list
*fields
)
170 struct expr
*res
= safe_malloc(sizeof(struct expr
));
171 res
->type
= efuncall
;
172 res
->data
.efuncall
.ident
= ident
;
173 res
->data
.efuncall
.args
= (struct expr
**)
174 list_to_array(args
, &res
->data
.efuncall
.nargs
, true);
175 set_fields(&res
->data
.efuncall
.fields
,
176 &res
->data
.efuncall
.nfields
, fields
);
180 struct expr
*expr_int(int integer
)
182 struct expr
*res
= safe_malloc(sizeof(struct expr
));
184 res
->data
.eint
= integer
;
188 struct expr
*expr_ident(char *ident
, struct list
*fields
)
190 struct expr
*res
= safe_malloc(sizeof(struct expr
));
192 res
->data
.eident
.ident
= ident
;
193 set_fields(&res
->data
.eident
.fields
, &res
->data
.eident
.nfields
, fields
);
197 struct expr
*expr_nil()
199 struct expr
*res
= safe_malloc(sizeof(struct expr
));
204 struct expr
*expr_tuple(struct expr
*left
, struct expr
*right
)
206 struct expr
*res
= safe_malloc(sizeof(struct expr
));
208 res
->data
.etuple
.left
= left
;
209 res
->data
.etuple
.right
= right
;
213 struct expr
*expr_string(char *str
)
215 struct expr
*res
= safe_malloc(sizeof(struct expr
));
217 res
->data
.estring
.nchar
= 0;
218 res
->data
.estring
.chars
= safe_malloc(strlen(str
)+1);
219 char *p
= res
->data
.estring
.chars
;
220 while(*str
!= '\0') {
221 str
= unescape_char(str
);
223 res
->data
.estring
.nchar
++;
229 struct expr
*expr_unop(enum unop op
, struct expr
*l
)
231 struct expr
*res
= safe_malloc(sizeof(struct expr
));
233 res
->data
.eunop
.op
= op
;
234 res
->data
.eunop
.l
= l
;
238 struct type
*type_basic(enum basictype type
)
240 struct type
*res
= safe_malloc(sizeof(struct type
));
242 res
->data
.tbasic
= type
;
246 struct type
*type_list(struct type
*type
)
248 struct type
*res
= safe_malloc(sizeof(struct type
));
250 res
->data
.tlist
= type
;
254 struct type
*type_tuple(struct type
*l
, struct type
*r
)
256 struct type
*res
= safe_malloc(sizeof(struct type
));
258 res
->data
.ttuple
.l
= l
;
259 res
->data
.ttuple
.r
= r
;
263 struct type
*type_var(char *ident
)
265 struct type
*res
= safe_malloc(sizeof(struct type
));
266 if (strcmp(ident
, "Int") == 0) {
268 res
->data
.tbasic
= btint
;
270 } else if (strcmp(ident
, "Char") == 0) {
272 res
->data
.tbasic
= btchar
;
274 } else if (strcmp(ident
, "Bool") == 0) {
276 res
->data
.tbasic
= btbool
;
278 } else if (strcmp(ident
, "Void") == 0) {
280 res
->data
.tbasic
= btvoid
;
284 res
->data
.tvar
= ident
;
289 void ast_print(struct ast
*ast
, FILE *out
)
293 for (int i
= 0; i
<ast
->ndecls
; i
++)
294 decl_print(ast
->decls
[i
], 0, out
);
297 void vardecl_print(struct vardecl
*decl
, int indent
, FILE *out
)
299 pindent(indent
, out
);
300 if (decl
->type
== NULL
)
301 safe_fprintf(out
, "var");
303 type_print(decl
->type
, out
);
304 safe_fprintf(out
, " %s = ", decl
->ident
);
305 expr_print(decl
->expr
, out
);
306 safe_fprintf(out
, ";\n");
309 void decl_print(struct decl
*decl
, int indent
, FILE *out
)
315 pindent(indent
, out
);
316 safe_fprintf(out
, "%s (", decl
->data
.dfun
.ident
);
317 for (int i
= 0; i
<decl
->data
.dfun
.nargs
; i
++) {
318 safe_fprintf(out
, "%s", decl
->data
.dfun
.args
[i
]);
319 if (i
< decl
->data
.dfun
.nargs
- 1)
320 safe_fprintf(out
, ", ");
322 safe_fprintf(out
, ")");
323 if (decl
->data
.dfun
.rtype
!= NULL
) {
324 safe_fprintf(out
, " :: ");
325 for (int i
= 0; i
<decl
->data
.dfun
.natypes
; i
++) {
326 type_print(decl
->data
.dfun
.atypes
[i
], out
);
327 safe_fprintf(out
, " ");
329 safe_fprintf(out
, "-> ");
330 type_print(decl
->data
.dfun
.rtype
, out
);
332 safe_fprintf(out
, " {\n");
333 for (int i
= 0; i
<decl
->data
.dfun
.nvar
; i
++)
334 vardecl_print(decl
->data
.dfun
.vars
[i
], indent
+1, out
);
335 for (int i
= 0; i
<decl
->data
.dfun
.nbody
; i
++)
336 stmt_print(decl
->data
.dfun
.body
[i
], indent
+1, out
);
337 pindent(indent
, out
);
338 safe_fprintf(out
, "}\n");
341 vardecl_print(decl
->data
.dvar
, indent
, out
);
344 die("Unsupported decl node\n");
348 void stmt_print(struct stmt
*stmt
, int indent
, FILE *out
)
354 pindent(indent
, out
);
355 fprintf(out
, "%s", stmt
->data
.sassign
.ident
);
356 for (int i
= 0; i
<stmt
->data
.sassign
.nfield
; i
++)
357 fprintf(out
, ".%s", stmt
->data
.sassign
.fields
[i
]);
358 safe_fprintf(out
, " = ");
359 expr_print(stmt
->data
.sassign
.expr
, out
);
360 safe_fprintf(out
, ";\n");
363 pindent(indent
, out
);
364 safe_fprintf(out
, "if (");
365 expr_print(stmt
->data
.sif
.pred
, out
);
366 safe_fprintf(out
, ") {\n");
367 for (int i
= 0; i
<stmt
->data
.sif
.nthen
; i
++)
368 stmt_print(stmt
->data
.sif
.then
[i
], indent
+1, out
);
369 pindent(indent
, out
);
370 safe_fprintf(out
, "} else {\n");
371 for (int i
= 0; i
<stmt
->data
.sif
.nels
; i
++)
372 stmt_print(stmt
->data
.sif
.els
[i
], indent
+1, out
);
373 pindent(indent
, out
);
374 safe_fprintf(out
, "}\n");
377 pindent(indent
, out
);
378 safe_fprintf(out
, "return ");
379 expr_print(stmt
->data
.sreturn
, out
);
380 safe_fprintf(out
, ";\n");
383 pindent(indent
, out
);
384 expr_print(stmt
->data
.sexpr
, out
);
385 safe_fprintf(out
, ";\n");
388 vardecl_print(stmt
->data
.svardecl
, indent
, out
);
391 pindent(indent
, out
);
392 safe_fprintf(out
, "while (");
393 expr_print(stmt
->data
.swhile
.pred
, out
);
394 safe_fprintf(out
, ") {\n");
395 for (int i
= 0; i
<stmt
->data
.swhile
.nbody
; i
++) {
396 stmt_print(stmt
->data
.swhile
.body
[i
], indent
+1, out
);
398 pindent(indent
, out
);
399 safe_fprintf(out
, "}\n");
402 die("Unsupported stmt node\n");
406 void expr_print(struct expr
*expr
, FILE *out
)
410 char buf
[] = "\\xff";
413 safe_fprintf(out
, "(");
414 expr_print(expr
->data
.ebinop
.l
, out
);
415 safe_fprintf(out
, "%s", binop_str
[expr
->data
.ebinop
.op
]);
416 expr_print(expr
->data
.ebinop
.r
, out
);
417 safe_fprintf(out
, ")");
420 safe_fprintf(out
, "%s", expr
->data
.ebool
? "true" : "false");
423 safe_fprintf(out
, "'%s'",
424 escape_char(expr
->data
.echar
, buf
, false));
427 safe_fprintf(out
, "%s(", expr
->data
.efuncall
.ident
);
428 for(int i
= 0; i
<expr
->data
.efuncall
.nargs
; i
++) {
429 expr_print(expr
->data
.efuncall
.args
[i
], out
);
430 if (i
+1 < expr
->data
.efuncall
.nargs
)
431 safe_fprintf(out
, ", ");
433 safe_fprintf(out
, ")");
434 for (int i
= 0; i
<expr
->data
.efuncall
.nfields
; i
++)
436 fieldspec_str
[expr
->data
.efuncall
.fields
[i
]]);
439 safe_fprintf(out
, "%d", expr
->data
.eint
);
442 fprintf(out
, "%s", expr
->data
.eident
.ident
);
443 for (int i
= 0; i
<expr
->data
.eident
.nfields
; i
++)
445 fieldspec_str
[expr
->data
.eident
.fields
[i
]]);
448 safe_fprintf(out
, "[]");
451 safe_fprintf(out
, "(");
452 expr_print(expr
->data
.etuple
.left
, out
);
453 safe_fprintf(out
, ", ");
454 expr_print(expr
->data
.etuple
.right
, out
);
455 safe_fprintf(out
, ")");
458 safe_fprintf(out
, "\"");
459 for (int i
= 0; i
<expr
->data
.estring
.nchar
; i
++)
460 safe_fprintf(out
, "%s", escape_char(
461 expr
->data
.estring
.chars
[i
], buf
, true));
462 safe_fprintf(out
, "\"");
465 safe_fprintf(out
, "(%s", unop_str
[expr
->data
.eunop
.op
]);
466 expr_print(expr
->data
.eunop
.l
, out
);
467 safe_fprintf(out
, ")");
470 die("Unsupported expr node\n");
474 void type_print(struct type
*type
, FILE *out
)
478 switch (type
->type
) {
480 safe_fprintf(out
, "%s", basictype_str
[type
->data
.tbasic
]);
483 safe_fprintf(out
, "[");
484 type_print(type
->data
.tlist
, out
);
485 safe_fprintf(out
, "]");
488 safe_fprintf(out
, "(");
489 type_print(type
->data
.ttuple
.l
, out
);
490 safe_fprintf(out
, ",");
491 type_print(type
->data
.ttuple
.r
, out
);
492 safe_fprintf(out
, ")");
495 safe_fprintf(out
, "%s", type
->data
.tvar
);
498 die("Unsupported type node\n");
502 void ast_free(struct ast
*ast
)
506 for (int i
= 0; i
<ast
->ndecls
; i
++)
507 decl_free(ast
->decls
[i
]);
512 void vardecl_free(struct vardecl
*decl
)
514 type_free(decl
->type
);
516 expr_free(decl
->expr
);
520 void decl_free(struct decl
*decl
)
526 free(decl
->data
.dfun
.ident
);
527 for (int i
= 0; i
<decl
->data
.dfun
.nargs
; i
++)
528 free(decl
->data
.dfun
.args
[i
]);
529 free(decl
->data
.dfun
.args
);
530 for (int i
= 0; i
<decl
->data
.dfun
.natypes
; i
++)
531 type_free(decl
->data
.dfun
.atypes
[i
]);
532 free(decl
->data
.dfun
.atypes
);
533 type_free(decl
->data
.dfun
.rtype
);
534 for (int i
= 0; i
<decl
->data
.dfun
.nvar
; i
++)
535 vardecl_free(decl
->data
.dfun
.vars
[i
]);
536 free(decl
->data
.dfun
.vars
);
537 for (int i
= 0; i
<decl
->data
.dfun
.nbody
; i
++)
538 stmt_free(decl
->data
.dfun
.body
[i
]);
539 free(decl
->data
.dfun
.body
);
542 vardecl_free(decl
->data
.dvar
);
545 die("Unsupported decl node\n");
550 void stmt_free(struct stmt
*stmt
)
556 free(stmt
->data
.sassign
.ident
);
557 for (int i
= 0; i
<stmt
->data
.sassign
.nfield
; i
++)
558 free(stmt
->data
.sassign
.fields
[i
]);
559 free(stmt
->data
.sassign
.fields
);
560 expr_free(stmt
->data
.sassign
.expr
);
563 expr_free(stmt
->data
.sif
.pred
);
564 for (int i
= 0; i
<stmt
->data
.sif
.nthen
; i
++)
565 stmt_free(stmt
->data
.sif
.then
[i
]);
566 free(stmt
->data
.sif
.then
);
567 for (int i
= 0; i
<stmt
->data
.sif
.nels
; i
++)
568 stmt_free(stmt
->data
.sif
.els
[i
]);
569 free(stmt
->data
.sif
.els
);
572 expr_free(stmt
->data
.sreturn
);
575 expr_free(stmt
->data
.sexpr
);
578 expr_free(stmt
->data
.swhile
.pred
);
579 for (int i
= 0; i
<stmt
->data
.swhile
.nbody
; i
++)
580 stmt_free(stmt
->data
.swhile
.body
[i
]);
581 free(stmt
->data
.swhile
.body
);
584 vardecl_free(stmt
->data
.svardecl
);
587 die("Unsupported stmt node\n");
592 void expr_free(struct expr
*expr
)
598 expr_free(expr
->data
.ebinop
.l
);
599 expr_free(expr
->data
.ebinop
.r
);
606 free(expr
->data
.efuncall
.ident
);
607 for (int i
= 0; i
<expr
->data
.efuncall
.nargs
; i
++)
608 expr_free(expr
->data
.efuncall
.args
[i
]);
609 free(expr
->data
.efuncall
.fields
);
610 free(expr
->data
.efuncall
.args
);
615 free(expr
->data
.eident
.ident
);
616 free(expr
->data
.eident
.fields
);
621 expr_free(expr
->data
.etuple
.left
);
622 expr_free(expr
->data
.etuple
.right
);
625 free(expr
->data
.estring
.chars
);
628 expr_free(expr
->data
.eunop
.l
);
631 die("Unsupported expr node\n");
636 void type_free(struct type
*type
)
640 switch (type
->type
) {
644 type_free(type
->data
.tlist
);
647 type_free(type
->data
.ttuple
.l
);
648 type_free(type
->data
.ttuple
.r
);
651 free(type
->data
.tvar
);
654 die("Unsupported type node\n");