git.m6w6.name Git - m6w6/ext-psi/blob - src/parser_proc.y

   1 %include {
   2 #include <stddef.h>
   3 #include <assert.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <stdarg.h>
   7
   8 #include "parser.h"
   9
  10 void psi_error(int, const char *, int, const char *, ...);
  11 }
  12
  13 %name PSI_ParserProc
  14 %token_prefix PSI_T_
  15 %token_type {PSI_Token *}
  16 %token_destructor {free($$);}
  17 %default_destructor {(void)P;}
  18 %extra_argument {PSI_Parser *P}
  19 /* TOKEN is defined inside syntax_error */
  20 %syntax_error {
  21         ++P->errors;
  22         if (TOKEN && TOKEN->type != PSI_T_EOF) {
  23                 psi_error(PSI_WARNING, TOKEN->file, TOKEN->line, "PSI syntax error: Unexpected token '%s'", TOKEN->text);
  24         } else {
  25                 psi_error(PSI_WARNING, P->psi.file.fn, P->line, "PSI syntax error: Unexpected end of input");
  26         }
  27 }
  28
  29 %nonassoc NAME.
  30 %left PLUS MINUS.
  31 %left SLASH ASTERISK.
  32 %fallback NAME TEMP FREE SET LET RETURN LIB STRING.
  33 %fallback STRUCT UNION.
  34
  35 file ::= blocks.
  36
  37 blocks ::= block.
  38 blocks ::= blocks block.
  39
  40 block ::= EOF.
  41 block ::= EOS.
  42
  43 block ::= LIB(T) QUOTED_STRING(libname) EOS. {
  44         if (P->psi.file.ln) {
  45                 P->error(T, PSI_WARNING, "Extra 'lib %s' statement has no effect", libname->text);
  46         } else {
  47                 P->psi.file.ln = strndup(libname->text + 1, libname->size - 2);
  48         }
  49         free(libname);
  50         free(T);
  51 }
  52
  53 block ::= decl(decl). {
  54         P->decls = add_decl(P->decls, decl);
  55 }
  56 block ::= impl(impl). {
  57         P->impls = add_impl(P->impls, impl);
  58 }
  59 block ::= decl_typedef(def). {
  60         P->defs = add_decl_typedef(P->defs, def);
  61         if (def->type->strct) {
  62                 P->structs = add_decl_struct(P->structs, def->type->strct);
  63         }
  64         if (def->type->enm) {
  65                 P->enums = add_decl_enum(P->enums, def->type->enm);
  66         }
  67 }
  68 block ::= constant(constant). {
  69         P->consts = add_constant(P->consts, constant);
  70 }
  71 block ::= decl_struct(strct). {
  72         P->structs = add_decl_struct(P->structs, strct);
  73 }
  74 block ::= decl_enum(e). {
  75         P->enums = add_decl_enum(P->enums, e);
  76 }
  77
  78 optional_name(n) ::= .{
  79         n = NULL;
  80 }
  81 optional_name(n) ::= NAME(N). {
  82         n = N;
  83 }
  84 enum_name(n) ::= ENUM(E) optional_name(N). {
  85         if (N) {
  86                 n = N;
  87                 free(E);
  88         } else {
  89                 char digest[17];
  90
  91                 PSI_TokenHash(E, digest);
  92                 n = PSI_TokenTranslit(PSI_TokenAppend(E, 1, digest), " ", "@");
  93         }
  94 }
  95
  96 %type decl_enum {decl_enum *}
  97 %destructor decl_enum {free_decl_enum($$);}
  98 decl_enum(e) ::= enum_name(N) LBRACE decl_enum_items(list) RBRACE. {
  99         e = init_decl_enum(N->text, list);
 100         e->token = N;
 101 }
 102
 103 %type decl_enum_items {decl_enum_items*}
 104 %destructor decl_enum_items {free_decl_enum_items($$);}
 105 decl_enum_items(l) ::= decl_enum_item(i). {
 106         l = init_decl_enum_items(i);
 107 }
 108 decl_enum_items(l) ::= decl_enum_items(l_) COMMA decl_enum_item(i). {
 109         l = add_decl_enum_item(l_, i);
 110 }
 111
 112 %type decl_enum_item {decl_enum_item*}
 113 %destructor decl_enum_item {free_decl_enum_item($$);}
 114 decl_enum_item(i) ::= NAME(N) EQUALS num_exp(num). {
 115         i = init_decl_enum_item(N->text, num);
 116         i->token = N;
 117 }
 118 decl_enum_item(i) ::= NAME(N). {
 119         i = init_decl_enum_item(N->text, NULL);
 120         i->token = N;
 121 }
 122
 123 struct_name(n) ::= STRUCT(S) optional_name(N). {
 124         if (N) {
 125                 n = N;
 126                 free(S);
 127         } else {
 128                 char digest[17];
 129
 130                 PSI_TokenHash(S, digest);
 131                 n = PSI_TokenTranslit(PSI_TokenAppend(S, 1, digest), " ", "@");
 132         }
 133 }
 134
 135 %type decl_struct_args_block {decl_args*}
 136 %destructor decl_struct_args_block {free_decl_args($$);}
 137 decl_struct_args_block(args_) ::= LBRACE struct_args(args) RBRACE. {
 138         args_ = args;
 139 }
 140 %type decl_struct_args {decl_args*}
 141 %destructor decl_struct_args {free_decl_args($$);}
 142 decl_struct_args(args_) ::= decl_struct_args_block(args). {
 143         args_ = args;
 144 }
 145 decl_struct_args(args_) ::= EOS. {
 146         args_ = init_decl_args(NULL);
 147 }
 148
 149
 150 %type decl_struct {decl_struct*}
 151 %destructor decl_struct {free_decl_struct($$);}
 152 decl_struct(strct) ::= struct_name(N) struct_size(size_) decl_struct_args(args). {
 153         strct = init_decl_struct(N->text, args);
 154         strct->size = size_;
 155         strct->token = N;
 156 }
 157
 158 %type struct_size {size_t}
 159 struct_size(size) ::= . {
 160         size = 0;
 161 }
 162 struct_size(size) ::= COLON COLON LPAREN NUMBER(SIZ) RPAREN. {
 163         size = atol(SIZ->text);
 164         free(SIZ);
 165 }
 166
 167 %token_class const_type_token BOOL INT FLOAT STRING.
 168 %type const_type {const_type*}
 169 %destructor const_type {free_const_type($$);}
 170 const_type(type_) ::= const_type_token(T). {
 171         type_ = init_const_type(T->type, T->text);
 172         free(T);
 173 }
 174 %type constant {constant*}
 175 %destructor constant {free_constant($$);}
 176 constant(constant) ::= CONST const_type(type) NSNAME(T) EQUALS impl_def_val(val) EOS. {
 177         constant = init_constant(type, T->text, val);
 178         free(T);
 179 }
 180
 181 %type decl_typedef {decl_arg*}
 182 %destructor decl_typedef {
 183         free_decl_arg($$);
 184         if ($$->type->strct) {
 185                 free_decl_struct($$->type->strct);
 186         }
 187         if ($$->type->enm) {
 188                 free_decl_enum($$->type->enm);
 189         }
 190         if ($$->type->func) {
 191                 free_decl($$->type->func);
 192         }
 193 }
 194 decl_typedef(def) ::= TYPEDEF(T) decl_typedef_body(def_) EOS. {
 195         def = def_;
 196         def->token = T;
 197 }
 198 %type decl_typedef_body_ex {decl_arg*}
 199 %destructor decl_typedef_body_ex {
 200         free_decl_arg($$);
 201         if ($$->type->strct) {
 202                 free_decl_struct($$->type->strct);
 203         }
 204         if ($$->type->enm) {
 205                 free_decl_enum($$->type->enm);
 206         }
 207         if ($$->type->func) {
 208                 free_decl($$->type->func);
 209         }
 210 }
 211 decl_typedef_body_ex(def) ::= struct_name(N) struct_size(size_) decl_struct_args_block(args) decl_var(var). {
 212         def = init_decl_arg(init_decl_type(PSI_T_STRUCT, N->text), var);
 213         def->type->token = PSI_TokenCopy(N);
 214         def->type->strct = init_decl_struct(N->text, args);
 215         def->type->strct->token = N;
 216         def->type->strct->size = size_;
 217 }
 218 decl_typedef_body_ex(def) ::= decl_enum(e) NAME(ALIAS). {
 219         def = init_decl_arg(init_decl_type(PSI_T_ENUM, e->name), init_decl_var(ALIAS->text, 0, 0));
 220         def->var->token = ALIAS;
 221         def->type->token = PSI_TokenCopy(e->token);
 222         def->type->enm = e;
 223 }
 224 %type decl_typedef_body {decl_arg*}
 225 %destructor decl_typedef_body {
 226         free_decl_arg($$);
 227         if ($$->type->strct) {
 228                 free_decl_struct($$->type->strct);
 229         }
 230         if ($$->type->enm) {
 231                 free_decl_enum($$->type->enm);
 232         }
 233         if ($$->type->func) {
 234                 free_decl($$->type->func);
 235         }
 236 }
 237 decl_typedef_body(def) ::= decl_typedef_body_ex(def_). {
 238         def = def_;
 239 }
 240 decl_typedef_body(def) ::= decl_func(func_) LPAREN decl_args(args) RPAREN. {
 241         def = init_decl_arg(init_decl_type(PSI_T_FUNCTION, func_->var->name), copy_decl_var(func_->var));
 242         def->type->token = PSI_TokenCopy(func_->token);
 243         def->type->func = init_decl(init_decl_abi("default"), func_, args);
 244 }
 245 decl_typedef_body(def) ::= decl_arg(arg). {
 246         def = arg;
 247 }
 248
 249 %type decl {decl*}
 250 %destructor decl {free_decl($$);}
 251 decl(decl) ::= decl_abi(abi) decl_func(func) LPAREN decl_args(args) RPAREN EOS. {
 252         decl = init_decl(abi, func, args);
 253 }
 254
 255 %type decl_func {decl_arg*}
 256 %destructor decl_func {free_decl_arg($$);}
 257 decl_func(func) ::= decl_arg(arg). {
 258         func = arg;
 259 }
 260 /* special case for void functions */
 261 decl_func(func) ::= VOID(T) NAME(N). {
 262         func = init_decl_arg(
 263                 init_decl_type(T->type, T->text),
 264                 init_decl_var(N->text, 0, 0)
 265         );
 266         func->type->token = T;
 267         free(N);
 268 }
 269
 270 %type decl_abi {decl_abi*}
 271 %destructor decl_abi {free_decl_abi($$);}
 272 decl_abi(abi) ::= NAME(T). {
 273         abi = init_decl_abi(T->text);
 274         abi->token = T;
 275 }
 276
 277 %type decl_var {decl_var*}
 278 %destructor decl_var {free_decl_var($$);}
 279 decl_var(var) ::= indirection(p) NAME(T). {
 280         var = init_decl_var(T->text, p, 0);
 281         var->token = T;
 282 }
 283 decl_var(var) ::= indirection(p) NAME(T) LBRACKET NUMBER(D) RBRACKET. {
 284         var = init_decl_var(T->text, p+1, atol(D->text));
 285         var->token = T;
 286         free(D);
 287 }
 288
 289 %type decl_vars {decl_vars*}
 290 %destructor decl_vars {free_decl_vars($$);}
 291 decl_vars(vars) ::= decl_var(var). {
 292         vars = init_decl_vars(var);
 293 }
 294 decl_vars(vars) ::= decl_vars(vars_) COMMA decl_var(var). {
 295         vars = add_decl_var(vars_, var);
 296 }
 297
 298 %type decl_arg {decl_arg*}
 299 %destructor decl_arg {free_decl_arg($$);}
 300 decl_arg(arg_) ::= const_decl_type(type) decl_var(var). {
 301         arg_ = init_decl_arg(type, var);
 302 }
 303 /* void pointers need a specific rule */
 304 decl_arg(arg_) ::= VOID(T) pointers(p) NAME(N). {
 305         arg_ = init_decl_arg(
 306                 init_decl_type(T->type, T->text),
 307                 init_decl_var(N->text, p, 0)
 308         );
 309         arg_->type->token = T;
 310         arg_->var->token = N;
 311         arg_->token = N;
 312 }
 313 decl_arg(arg_) ::= CONST VOID(T) pointers(p) NAME(N). {
 314         arg_ = init_decl_arg(
 315                 init_decl_type(T->type, T->text),
 316                 init_decl_var(N->text, p, 0)
 317         );
 318         arg_->type->token = T;
 319         arg_->var->token = N;
 320         arg_->token = N;
 321 }
 322
 323 %type decl_args {decl_args*}
 324 %destructor decl_args {free_decl_args($$);}
 325 decl_args ::= .
 326 decl_args ::= VOID.
 327 decl_args(args) ::= decl_arg(arg). {
 328         args = init_decl_args(arg);
 329 }
 330 decl_args(args) ::= decl_args(args_) COMMA decl_arg(arg). {
 331         args = add_decl_arg(args_, arg);
 332 }
 333 decl_args(args) ::= decl_args(args_) COMMA ELLIPSIS. {
 334         args = args_;
 335         args->varargs = 1;
 336 }
 337 %type struct_args {decl_args*}
 338 %destructor struct_args {free_decl_args($$);}
 339 struct_args(args) ::= struct_arg(arg). {
 340         args = init_decl_args(arg);
 341 }
 342 struct_args(args) ::= struct_args(args_) struct_arg(arg). {
 343         args = add_decl_arg(args_, arg);
 344 }
 345 %type struct_arg {decl_arg*}
 346 %destructor struct_arg {free_decl_arg($$);}
 347 struct_arg(arg_) ::= decl_typedef_body_ex(def) EOS. {
 348         arg_ = def;
 349 }
 350 struct_arg(arg) ::= decl_arg(arg_) struct_layout(layout_) EOS. {
 351         arg_->layout = layout_;
 352         arg = arg_;
 353 }
 354
 355 %type struct_layout {decl_struct_layout*}
 356 %destructor struct_layout {free_decl_struct_layout($$);}
 357 struct_layout(layout) ::= . {
 358         layout = NULL;
 359 }
 360 struct_layout(layout) ::= COLON COLON LPAREN NUMBER(POS) COMMA NUMBER(SIZ) RPAREN. {
 361         layout = init_decl_struct_layout(atol(POS->text), atol(SIZ->text));
 362         free(POS);
 363         free(SIZ);
 364 }
 365
 366 /* un/signed, urgh */
 367 decl_scalar_type(type_) ::= CHAR(C). {
 368         type_ = C;
 369 }
 370 decl_scalar_type(type_) ::= SHORT(S) decl_scalar_type_short(s). {
 371         if (s) {
 372                 type_ = PSI_TokenCat(2, S, s);
 373                 free(S);
 374                 free(s);
 375         } else {
 376                 type_ = S;
 377         }
 378 }
 379 decl_scalar_type_short(s) ::= . {
 380         s = NULL;
 381 }
 382
 383 decl_scalar_type_short(s) ::= INT(I). {
 384         s = I;
 385 }
 386 decl_scalar_type(type_) ::= INT(I). {
 387         type_ = I;
 388 }
 389 decl_scalar_type(type_) ::= LONG(L) decl_scalar_type_long(l). {
 390         if (l) {
 391                 type_ = PSI_TokenCat(2, L, l);
 392                 free(L);
 393                 free(l);
 394         } else {
 395                 type_ = L;
 396         }
 397 }
 398 decl_scalar_type_long(l) ::= . {
 399         l = NULL;
 400 }
 401 decl_scalar_type_long(l) ::= DOUBLE(D). {
 402         l = D;
 403 }
 404 decl_scalar_type_long(l) ::= LONG(L) decl_scalar_type_long_long(ll). {
 405         if (ll) {
 406                 l = PSI_TokenCat(2, L, ll);
 407                 free(L);
 408                 free(ll);
 409         } else {
 410                 l = L;
 411         }
 412 }
 413 decl_scalar_type_long_long(ll) ::= . {
 414         ll = NULL;
 415 }
 416 decl_scalar_type_long_long(ll) ::= INT(I). {
 417         ll = I;
 418 }
 419 decl_type(type_) ::= UNSIGNED(U) decl_scalar_type(N). {
 420         PSI_Token *T = PSI_TokenCat(2, U, N);
 421         type_ = init_decl_type(T->type, T->text);
 422         type_->token = T;
 423         free(U);
 424         free(N);
 425 }
 426 decl_type(type_) ::= SIGNED(S) decl_scalar_type(N). {
 427         PSI_Token *T = PSI_TokenCat(2, S, N);
 428         type_ = init_decl_type(T->type, T->text);
 429         type_->token = T;
 430         free(S);
 431         free(N);
 432 }
 433 decl_type(type_) ::= UNSIGNED(U). {
 434         type_ = init_decl_type(PSI_T_NAME, U->text);
 435         type_->token = U;
 436 }
 437 decl_type(type_) ::= SIGNED(S). {
 438         type_ = init_decl_type(PSI_T_NAME, S->text);
 439         type_->token = S;
 440 }
 441 decl_type(type_) ::= decl_scalar_type(N). {
 442         type_ = init_decl_type(N->type, N->text);
 443         type_->token = N;
 444 }
 445 /* structs ! */
 446 decl_type(type_) ::= STRUCT(S) NAME(T). {
 447         type_ = init_decl_type(S->type, T->text);
 448         type_->token = T;
 449         free(S);
 450 }
 451 decl_type(type_) ::= ENUM(E) NAME(T). {
 452         type_ = init_decl_type(E->type, T->text);
 453         type_->token = T;
 454         free(E);
 455 }
 456 %token_class decl_type_token FLOAT DOUBLE INT8 UINT8 INT16 UINT16 INT32 UINT32 INT64 UINT64 NAME.
 457 %type decl_type {decl_type*}
 458 %destructor decl_type {free_decl_type($$);}
 459 decl_type(type_) ::= decl_type_token(T). {
 460         type_ = init_decl_type(T->type, T->text);
 461         type_->token = T;
 462 }
 463
 464
 465 %type const_decl_type {decl_type*}
 466 %destructor const_decl_type {free_decl_type($$);}
 467 const_decl_type(type) ::= decl_type(type_). {
 468         type = type_;
 469 }
 470 const_decl_type(type) ::= CONST decl_type(type_). {
 471         type = type_;
 472 }
 473
 474 %type impl {impl*}
 475 %destructor impl {free_impl($$);}
 476 impl(impl) ::= impl_func(func) LBRACE impl_stmts(stmts) RBRACE. {
 477         impl = init_impl(func, stmts);
 478 }
 479
 480 %type impl_func {impl_func*}
 481 %destructor impl_func {free_impl_func($$);}
 482 impl_func(func) ::= FUNCTION reference(r) NSNAME(NAME) impl_args(args) COLON impl_type(type). {
 483         func = init_impl_func(NAME->text, args, type, r);
 484         func->token = NAME;
 485 }
 486
 487 %token_class impl_def_val_token NULL NUMBER TRUE FALSE QUOTED_STRING.
 488 %type impl_def_val {impl_def_val*}
 489 %destructor impl_def_val {free_impl_def_val($$);}
 490 impl_def_val(def) ::= impl_def_val_token(T). {
 491         def = init_impl_def_val(T->type, T->text);
 492         free(T);
 493 }
 494
 495 %type impl_var {impl_var*}
 496 %destructor impl_var {free_impl_var($$);}
 497 impl_var(var) ::= reference(r) DOLLAR NAME(T). {
 498         var = init_impl_var(T->text, r);
 499         var->token = T;
 500 }
 501
 502 %type impl_arg {impl_arg*}
 503 %destructor impl_arg {free_impl_arg($$);}
 504 impl_arg(arg) ::= impl_type(type) impl_var(var). {
 505         arg = init_impl_arg(type, var, NULL);
 506 }
 507 impl_arg(arg) ::= impl_type(type) impl_var(var) EQUALS impl_def_val(def). {
 508         arg = init_impl_arg(type, var, def);
 509 }
 510
 511 %type impl_args {impl_args*}
 512 %destructor impl_args {free_impl_args($$);}
 513 impl_args(args) ::= LPAREN RPAREN. {
 514         args = NULL;
 515 }
 516 impl_args(args) ::= LPAREN impl_arg_list(args_) RPAREN. {
 517         args = args_;
 518 }
 519 impl_args(args) ::= LPAREN impl_arg_list(args_) COMMA impl_vararg(va) RPAREN. {
 520         args = args_;
 521         args->vararg.name = va;
 522 }
 523
 524 %type impl_vararg {impl_arg*}
 525 %destructor impl_vararg {free_impl_arg($$);}
 526 impl_vararg(va) ::= impl_type(type) reference(r) ELLIPSIS DOLLAR NAME(T). {
 527         va = init_impl_arg(type, init_impl_var(T->text, r), NULL);
 528         free(T);
 529 }
 530
 531 %type impl_arg_list {impl_args*}
 532 %destructor impl_arg_list {free_impl_args($$);}
 533 impl_arg_list(args) ::= impl_arg(arg). {
 534         args = init_impl_args(arg);
 535 }
 536 impl_arg_list(args) ::= impl_arg_list(args_) COMMA impl_arg(arg). {
 537         args = add_impl_arg(args_, arg);
 538 }
 539
 540 %type impl_stmts {impl_stmts*}
 541 %destructor impl_stmts {free_impl_stmts($$);}
 542 impl_stmts(stmts) ::= impl_stmt(stmt). {
 543         stmts = init_impl_stmts(stmt);
 544 }
 545 impl_stmts(stmts) ::= impl_stmts(stmts_) impl_stmt(stmt). {
 546         stmts = add_impl_stmt(stmts_, stmt);
 547 }
 548
 549 %type impl_stmt {impl_stmt*}
 550 %destructor impl_stmt {free_impl_stmt($$);}
 551 impl_stmt(stmt) ::= let_stmt(let). {
 552         stmt = init_impl_stmt(PSI_T_LET, let);
 553 }
 554 impl_stmt(stmt) ::= set_stmt(set). {
 555         stmt = init_impl_stmt(PSI_T_SET, set);
 556 }
 557 impl_stmt(stmt) ::= return_stmt(ret). {
 558         stmt = init_impl_stmt(PSI_T_RETURN, ret);
 559 }
 560 impl_stmt(stmt) ::= free_stmt(free). {
 561         stmt = init_impl_stmt(PSI_T_FREE, free);
 562 }
 563
 564 %token_class num_exp_token NUMBER NSNAME.
 565 %token_class num_exp_op_token PLUS MINUS ASTERISK SLASH.
 566 %type num_exp {num_exp*}
 567 %destructor num_exp {free_num_exp($$);}
 568 num_exp(exp) ::= num_exp_token(tok). {
 569         exp = init_num_exp(tok->type, tok->text);
 570         exp->token = tok;
 571 }
 572 num_exp(exp) ::= decl_var(var). {
 573         exp = init_num_exp(PSI_T_NAME, var);
 574         exp->token = PSI_TokenCopy(var->token);
 575 }
 576 num_exp(exp) ::= num_exp(exp_) num_exp_op_token(operator_) num_exp(operand_). {
 577         exp_->operator = operator_->type;
 578         exp_->operand = operand_;
 579         exp = exp_;
 580         free(operator_);
 581 }
 582
 583 %type let_stmt {let_stmt*}
 584 %destructor let_stmt {free_let_stmt($$);}
 585 let_stmt(let) ::= LET decl_var(var) EOS. {
 586         let = init_let_stmt(var, init_let_val(PSI_LET_NULL, NULL));
 587 }
 588 let_stmt(let) ::= LET decl_var(var) EQUALS reference(r) let_val(val) EOS. {
 589         val->flags.one.is_reference = r ? 1 : 0;
 590         let = init_let_stmt(var, val);
 591 }
 592 let_stmt(let) ::= TEMP decl_var(var) EQUALS decl_var(val) EOS. {
 593         let = init_let_stmt(var, init_let_val(PSI_LET_TMP, val));
 594 }
 595
 596 %type let_val {let_val*}
 597 %destructor let_val {free_let_val($$);}
 598 let_val(val) ::= NULL. {
 599         val = init_let_val(PSI_LET_NULL, NULL);
 600 }
 601 let_val(val) ::= num_exp(exp). {
 602         val = init_let_val(PSI_LET_NUMEXP, exp);
 603 }
 604 let_val(val) ::= CALLOC LPAREN let_calloc(alloc) RPAREN. {
 605         val = init_let_val(PSI_LET_CALLOC, alloc);
 606 }
 607 let_val(val) ::= let_func(func). {
 608         val = init_let_val(PSI_LET_FUNC, func);
 609 }
 610
 611 %type let_calloc {let_calloc*}
 612 %destructor let_calloc {free_let_calloc($$);}
 613 let_calloc(alloc) ::= num_exp(nmemb) COMMA num_exp(size). {
 614         alloc = init_let_calloc(nmemb, size);
 615 }
 616 %token_class let_func_token OBJVAL ARRVAL PATHVAL STRLEN STRVAL FLOATVAL INTVAL BOOLVAL.
 617 %type let_func {let_func*}
 618 %destructor let_func {free_let_func($$);}
 619 let_func(func) ::= let_func_token(T) LPAREN impl_var(var) RPAREN. {
 620         func = init_let_func(T->type, T->text, var);
 621         free(T);
 622 }
 623
 624
 625 %type set_stmt {set_stmt*}
 626 %destructor set_stmt {free_set_stmt($$);}
 627 set_stmt(set) ::= SET impl_var(var) EQUALS set_value(val) EOS. {
 628         set = init_set_stmt(var, val);
 629 }
 630
 631 %type set_value {set_value*}
 632 %destructor set_value {free_set_value($$);}
 633 set_value(val) ::= set_func(func) LPAREN decl_var(var) RPAREN. {
 634         val = init_set_value(func, init_decl_vars(var));
 635 }
 636 set_value(val) ::= set_func(func) LPAREN decl_var(var) COMMA num_exp(num_) RPAREN. {
 637         val = init_set_value(func, init_decl_vars(var));
 638         val->num = num_;
 639 }
 640 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA ELLIPSIS(T) RPAREN. {
 641         free_set_func(func_);
 642         val = init_set_value(init_set_func(T->type, T->text), init_decl_vars(var));
 643         val->func->token = T;
 644 }
 645 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA set_vals(vals) RPAREN. {
 646         val = vals;
 647         val->func = func_;
 648         val->vars = init_decl_vars(var);
 649 }
 650 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA num_exp(num_) COMMA set_vals(vals) RPAREN. {
 651         val = vals;
 652         val->func = func_;
 653         val->num = num_;
 654         val->vars = init_decl_vars(var);
 655 }
 656 %type set_vals {set_value*}
 657 %destructor set_vals {free_set_value($$);}
 658 set_vals(vals) ::= set_value(val). {
 659         vals = add_inner_set_value(init_set_value(NULL, NULL), val);
 660 }
 661 set_vals(vals) ::= set_vals(vals_) COMMA set_value(val). {
 662         vals = add_inner_set_value(vals_, val);
 663 }
 664
 665 %token_class set_func_token TO_OBJECT TO_ARRAY TO_STRING TO_INT TO_FLOAT TO_BOOL VOID.
 666 %type set_func {set_func*}
 667 %destructor set_func {free_set_func($$);}
 668 set_func(func) ::= set_func_token(T). {
 669         func = init_set_func(T->type, T->text);
 670         func->token = T;
 671 }
 672
 673 %type return_stmt {return_stmt*}
 674 %destructor return_stmt {free_return_stmt($$);}
 675 return_stmt(ret) ::= RETURN(T) set_value(val) EOS. {
 676         ret = init_return_stmt(val);
 677         ret->token = T;
 678 }
 679
 680 %type free_stmt {free_stmt*}
 681 %destructor free_stmt {free_free_stmt($$);}
 682 free_stmt(free) ::= FREE free_calls(calls) EOS. {
 683         free = init_free_stmt(calls);
 684 }
 685
 686 %type free_calls {free_calls*}
 687 %destructor free_calls {free_free_calls($$);}
 688 free_calls(calls) ::= free_call(call). {
 689         calls = init_free_calls(call);
 690 }
 691 free_calls(calls) ::= free_calls(calls_) COMMA free_call(call). {
 692         calls = add_free_call(calls_, call);
 693 }
 694
 695 %type free_call {free_call*}
 696 %destructor free_call {free_free_call($$);}
 697 free_call(call) ::= NAME(F) LPAREN decl_vars(vars) RPAREN. {
 698         call = init_free_call(F->text, vars);
 699         call->token = F;
 700 }
 701
 702 %token_class impl_type_token VOID MIXED BOOL INT FLOAT STRING ARRAY OBJECT.
 703 %type impl_type {impl_type*}
 704 %destructor impl_type {free_impl_type($$);}
 705 impl_type(type_) ::= impl_type_token(T). {
 706         type_ = init_impl_type(T->type, T->text);
 707         free(T);
 708 }
 709
 710 %type reference {char}
 711 reference(r) ::= . {r = 0;}
 712 reference(r) ::= AMPERSAND. {r = 1;}
 713
 714 %type indirection {unsigned}
 715 indirection(i) ::= . {i = 0;}
 716 indirection(i) ::= pointers(p). {i = p;}
 717
 718 %type pointers {unsigned}
 719 pointers(p) ::= ASTERISK. {p = 1;}
 720 pointers(p) ::= pointers(P) ASTERISK. {p = P+1;}