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