dlls/jscript/engine.h

   1 /*
   2  * Copyright 2008 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 typedef struct _source_elements_t source_elements_t;
  20 typedef struct _function_expression_t function_expression_t;
  21 typedef struct _expression_t expression_t;
  22
  23 typedef struct _function_declaration_t {
  24     function_expression_t *expr;
  25
  26     struct _function_declaration_t *next;
  27 } function_declaration_t;
  28
  29 typedef struct _var_list_t {
  30     const WCHAR *identifier;
  31
  32     struct _var_list_t *next;
  33 } var_list_t;
  34
  35 typedef struct _func_stack {
  36     function_declaration_t *func_head;
  37     function_declaration_t *func_tail;
  38     var_list_t *var_head;
  39     var_list_t *var_tail;
  40
  41     struct _func_stack *next;
  42 } func_stack_t;
  43
  44 #define OP_LIST                            \
  45     X(add,        1, 0,0)                  \
  46     X(bool,       1, ARG_INT,    0)        \
  47     X(bneg,       1, 0,0)                  \
  48     X(delete,     1, 0,0)                  \
  49     X(div,        1, 0,0)                  \
  50     X(double,     1, ARG_SBL,    0)        \
  51     X(eq,         1, 0,0)                  \
  52     X(eq2,        1, 0,0)                  \
  53     X(ident,      1, ARG_BSTR,   0)        \
  54     X(in,         1, 0,0)                  \
  55     X(int,        1, ARG_INT,    0)        \
  56     X(jmp,        0, ARG_ADDR,   0)        \
  57     X(jmp_nz,     0, ARG_ADDR,   0)        \
  58     X(jmp_z,      0, ARG_ADDR,   0)        \
  59     X(lt,         1, 0,0)                  \
  60     X(lteq,       1, 0,0)                  \
  61     X(minus,      1, 0,0)                  \
  62     X(mod,        1, 0,0)                  \
  63     X(mul,        1, 0,0)                  \
  64     X(neg,        1, 0,0)                  \
  65     X(neq,        1, 0,0)                  \
  66     X(neq2,       1, 0,0)                  \
  67     X(new,        1, ARG_INT,    0)        \
  68     X(null,       1, 0,0)                  \
  69     X(or,         1, 0,0)                  \
  70     X(pop,        1, 0,0)                  \
  71     X(regexp,     1, ARG_STR,    ARG_INT)  \
  72     X(str,        1, ARG_STR,    0)        \
  73     X(this,       1, 0,0)                  \
  74     X(tonum,      1, 0,0)                  \
  75     X(tree,       1, ARG_EXPR,   0)        \
  76     X(ret,        0, 0,0)                  \
  77     X(sub,        1, 0,0)                  \
  78     X(void,       1, 0,0)                  \
  79     X(xor,        1, 0,0)
  80
  81 typedef enum {
  82 #define X(x,a,b,c) OP_##x,
  83 OP_LIST
  84 #undef X
  85     OP_LAST
  86 } jsop_t;
  87
  88 typedef union {
  89     expression_t *expr;
  90     BSTR bstr;
  91     double *dbl;
  92     LONG lng;
  93     WCHAR *str;
  94     unsigned uint;
  95 } instr_arg_t;
  96
  97 typedef enum {
  98     ARG_NONE = 0,
  99     ARG_ADDR,
 100     ARG_BSTR,
 101     ARG_EXPR,
 102     ARG_INT,
 103     ARG_STR
 104 } instr_arg_type_t;
 105
 106 typedef struct {
 107     jsop_t op;
 108     instr_arg_t arg1;
 109     instr_arg_t arg2;
 110 } instr_t;
 111
 112 typedef struct {
 113     instr_t *instrs;
 114     jsheap_t heap;
 115
 116     BSTR *bstr_pool;
 117     unsigned bstr_pool_size;
 118     unsigned bstr_cnt;
 119 } bytecode_t;
 120
 121 void release_bytecode(bytecode_t*);
 122
 123 typedef struct _compiler_ctx_t compiler_ctx_t;
 124
 125 void release_compiler(compiler_ctx_t*);
 126
 127 typedef struct _parser_ctx_t {
 128     LONG ref;
 129
 130     WCHAR *begin;
 131     const WCHAR *end;
 132     const WCHAR *ptr;
 133
 134     script_ctx_t *script;
 135     source_elements_t *source;
 136     BOOL nl;
 137     BOOL is_html;
 138     BOOL lexer_error;
 139     HRESULT hres;
 140
 141     jsheap_t heap;
 142
 143     func_stack_t *func_stack;
 144
 145     bytecode_t *code;
 146     compiler_ctx_t *compiler;
 147
 148     struct _parser_ctx_t *next;
 149 } parser_ctx_t;
 150
 151 HRESULT script_parse(script_ctx_t*,const WCHAR*,const WCHAR*,parser_ctx_t**) DECLSPEC_HIDDEN;
 152 void parser_release(parser_ctx_t*) DECLSPEC_HIDDEN;
 153
 154 int parser_lex(void*,parser_ctx_t*) DECLSPEC_HIDDEN;
 155
 156 static inline void parser_addref(parser_ctx_t *ctx)
 157 {
 158     ctx->ref++;
 159 }
 160
 161 static inline void *parser_alloc(parser_ctx_t *ctx, DWORD size)
 162 {
 163     return jsheap_alloc(&ctx->heap, size);
 164 }
 165
 166 static inline void *parser_alloc_tmp(parser_ctx_t *ctx, DWORD size)
 167 {
 168     return jsheap_alloc(&ctx->script->tmp_heap, size);
 169 }
 170
 171 typedef struct _scope_chain_t {
 172     LONG ref;
 173     jsdisp_t *obj;
 174     struct _scope_chain_t *next;
 175 } scope_chain_t;
 176
 177 HRESULT scope_push(scope_chain_t*,jsdisp_t*,scope_chain_t**) DECLSPEC_HIDDEN;
 178 void scope_release(scope_chain_t*) DECLSPEC_HIDDEN;
 179
 180 static inline void scope_addref(scope_chain_t *scope)
 181 {
 182     scope->ref++;
 183 }
 184
 185 struct _exec_ctx_t {
 186     LONG ref;
 187
 188     parser_ctx_t *parser;
 189     scope_chain_t *scope_chain;
 190     jsdisp_t *var_disp;
 191     IDispatch *this_obj;
 192     BOOL is_global;
 193
 194     VARIANT *stack;
 195     unsigned stack_size;
 196     unsigned top;
 197
 198     unsigned ip;
 199     jsexcept_t ei;
 200 };
 201
 202 static inline void exec_addref(exec_ctx_t *ctx)
 203 {
 204     ctx->ref++;
 205 }
 206
 207 void exec_release(exec_ctx_t*) DECLSPEC_HIDDEN;
 208 HRESULT create_exec_ctx(script_ctx_t*,IDispatch*,jsdisp_t*,scope_chain_t*,BOOL,exec_ctx_t**) DECLSPEC_HIDDEN;
 209 HRESULT exec_source(exec_ctx_t*,parser_ctx_t*,source_elements_t*,BOOL,jsexcept_t*,VARIANT*) DECLSPEC_HIDDEN;
 210
 211 typedef struct _statement_t statement_t;
 212 typedef struct _parameter_t parameter_t;
 213
 214 HRESULT create_source_function(parser_ctx_t*,parameter_t*,source_elements_t*,scope_chain_t*,
 215         const WCHAR*,DWORD,jsdisp_t**) DECLSPEC_HIDDEN;
 216
 217 typedef enum {
 218     LT_INT,
 219     LT_DOUBLE,
 220     LT_STRING,
 221     LT_BOOL,
 222     LT_NULL,
 223     LT_REGEXP
 224 }literal_type_t;
 225
 226 typedef struct {
 227     literal_type_t type;
 228     union {
 229         LONG lval;
 230         double dval;
 231         const WCHAR *wstr;
 232         VARIANT_BOOL bval;
 233         struct {
 234             const WCHAR *str;
 235             DWORD str_len;
 236             DWORD flags;
 237         } regexp;
 238     } u;
 239 } literal_t;
 240
 241 literal_t *parse_regexp(parser_ctx_t*) DECLSPEC_HIDDEN;
 242 literal_t *new_boolean_literal(parser_ctx_t*,VARIANT_BOOL) DECLSPEC_HIDDEN;
 243
 244 typedef struct _variable_declaration_t {
 245     const WCHAR *identifier;
 246     expression_t *expr;
 247
 248     struct _variable_declaration_t *next;
 249 } variable_declaration_t;
 250
 251 typedef struct _return_type_t return_type_t;
 252
 253 typedef HRESULT (*statement_eval_t)(script_ctx_t*,statement_t*,return_type_t*,VARIANT*);
 254
 255 struct _statement_t {
 256     statement_eval_t eval;
 257     statement_t *next;
 258 };
 259
 260 typedef struct {
 261     statement_t stat;
 262     statement_t *stat_list;
 263 } block_statement_t;
 264
 265 typedef struct {
 266     statement_t stat;
 267     variable_declaration_t *variable_list;
 268 } var_statement_t;
 269
 270 typedef struct {
 271     statement_t stat;
 272     expression_t *expr;
 273 } expression_statement_t;
 274
 275 typedef struct {
 276     statement_t stat;
 277     expression_t *expr;
 278     statement_t *if_stat;
 279     statement_t *else_stat;
 280 } if_statement_t;
 281
 282 typedef struct {
 283     statement_t stat;
 284     BOOL do_while;
 285     expression_t *expr;
 286     statement_t *statement;
 287 } while_statement_t;
 288
 289 typedef struct {
 290     statement_t stat;
 291     variable_declaration_t *variable_list;
 292     expression_t *begin_expr;
 293     expression_t *expr;
 294     expression_t *end_expr;
 295     statement_t *statement;
 296 } for_statement_t;
 297
 298 typedef struct {
 299     statement_t stat;
 300     variable_declaration_t *variable;
 301     expression_t *expr;
 302     expression_t *in_expr;
 303     statement_t *statement;
 304 } forin_statement_t;
 305
 306 typedef struct {
 307     statement_t stat;
 308     const WCHAR *identifier;
 309 } branch_statement_t;
 310
 311 typedef struct {
 312     statement_t stat;
 313     expression_t *expr;
 314     statement_t *statement;
 315 } with_statement_t;
 316
 317 typedef struct {
 318     statement_t stat;
 319     const WCHAR *identifier;
 320     statement_t *statement;
 321 } labelled_statement_t;
 322
 323 typedef struct _case_clausule_t {
 324     expression_t *expr;
 325     statement_t *stat;
 326
 327     struct _case_clausule_t *next;
 328 } case_clausule_t;
 329
 330 typedef struct {
 331     statement_t stat;
 332     expression_t *expr;
 333     case_clausule_t *case_list;
 334 } switch_statement_t;
 335
 336 typedef struct {
 337     const WCHAR *identifier;
 338     statement_t *statement;
 339 } catch_block_t;
 340
 341 typedef struct {
 342     statement_t stat;
 343     statement_t *try_statement;
 344     catch_block_t *catch_block;
 345     statement_t *finally_statement;
 346 } try_statement_t;
 347
 348 HRESULT block_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 349 HRESULT var_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 350 HRESULT empty_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 351 HRESULT expression_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 352 HRESULT if_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 353 HRESULT while_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 354 HRESULT for_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 355 HRESULT forin_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 356 HRESULT continue_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 357 HRESULT break_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 358 HRESULT return_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 359 HRESULT with_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 360 HRESULT labelled_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 361 HRESULT switch_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 362 HRESULT throw_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 363 HRESULT try_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 364
 365 typedef struct {
 366     enum {
 367         EXPRVAL_VARIANT,
 368         EXPRVAL_IDREF,
 369         EXPRVAL_INVALID
 370     } type;
 371     union {
 372         VARIANT var;
 373         struct {
 374             IDispatch *disp;
 375             DISPID id;
 376         } idref;
 377         BSTR identifier;
 378     } u;
 379 } exprval_t;
 380
 381 typedef enum {
 382      EXPR_COMMA,
 383      EXPR_OR,
 384      EXPR_AND,
 385      EXPR_BOR,
 386      EXPR_BXOR,
 387      EXPR_BAND,
 388      EXPR_INSTANCEOF,
 389      EXPR_IN,
 390      EXPR_ADD,
 391      EXPR_SUB,
 392      EXPR_MUL,
 393      EXPR_DIV,
 394      EXPR_MOD,
 395      EXPR_DELETE,
 396      EXPR_VOID,
 397      EXPR_TYPEOF,
 398      EXPR_MINUS,
 399      EXPR_PLUS,
 400      EXPR_POSTINC,
 401      EXPR_POSTDEC,
 402      EXPR_PREINC,
 403      EXPR_PREDEC,
 404      EXPR_EQ,
 405      EXPR_EQEQ,
 406      EXPR_NOTEQ,
 407      EXPR_NOTEQEQ,
 408      EXPR_LESS,
 409      EXPR_LESSEQ,
 410      EXPR_GREATER,
 411      EXPR_GREATEREQ,
 412      EXPR_BITNEG,
 413      EXPR_LOGNEG,
 414      EXPR_LSHIFT,
 415      EXPR_RSHIFT,
 416      EXPR_RRSHIFT,
 417      EXPR_ASSIGN,
 418      EXPR_ASSIGNLSHIFT,
 419      EXPR_ASSIGNRSHIFT,
 420      EXPR_ASSIGNRRSHIFT,
 421      EXPR_ASSIGNADD,
 422      EXPR_ASSIGNSUB,
 423      EXPR_ASSIGNMUL,
 424      EXPR_ASSIGNDIV,
 425      EXPR_ASSIGNMOD,
 426      EXPR_ASSIGNAND,
 427      EXPR_ASSIGNOR,
 428      EXPR_ASSIGNXOR,
 429      EXPR_COND,
 430      EXPR_ARRAY,
 431      EXPR_MEMBER,
 432      EXPR_NEW,
 433      EXPR_CALL,
 434      EXPR_THIS,
 435      EXPR_FUNC,
 436      EXPR_IDENT,
 437      EXPR_ARRAYLIT,
 438      EXPR_PROPVAL,
 439      EXPR_LITERAL
 440 } expression_type_t;
 441
 442 typedef HRESULT (*expression_eval_t)(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*);
 443
 444 struct _expression_t {
 445     expression_type_t type;
 446     expression_eval_t eval;
 447     unsigned instr_off;
 448 };
 449
 450 struct _parameter_t {
 451     const WCHAR *identifier;
 452
 453     struct _parameter_t *next;
 454 };
 455
 456 struct _source_elements_t {
 457     statement_t *statement;
 458     statement_t *statement_tail;
 459     function_declaration_t *functions;
 460     var_list_t *variables;
 461 };
 462
 463 struct _function_expression_t {
 464     expression_t expr;
 465     const WCHAR *identifier;
 466     parameter_t *parameter_list;
 467     source_elements_t *source_elements;
 468     const WCHAR *src_str;
 469     DWORD src_len;
 470 };
 471
 472 typedef struct {
 473     expression_t expr;
 474     expression_t *expression1;
 475     expression_t *expression2;
 476 } binary_expression_t;
 477
 478 typedef struct {
 479     expression_t expr;
 480     expression_t *expression;
 481 } unary_expression_t;
 482
 483 typedef struct {
 484     expression_t expr;
 485     expression_t *expression;
 486     expression_t *true_expression;
 487     expression_t *false_expression;
 488 } conditional_expression_t;
 489
 490 typedef struct {
 491     expression_t expr;
 492     expression_t *member_expr;
 493     expression_t *expression;
 494 } array_expression_t;
 495
 496 typedef struct {
 497     expression_t expr;
 498     expression_t *expression;
 499     const WCHAR *identifier;
 500 } member_expression_t;
 501
 502 typedef struct _argument_t {
 503     expression_t *expr;
 504
 505     struct _argument_t *next;
 506 } argument_t;
 507
 508 typedef struct {
 509     expression_t expr;
 510     expression_t *expression;
 511     argument_t *argument_list;
 512 } call_expression_t;
 513
 514 typedef struct {
 515     expression_t expr;
 516     const WCHAR *identifier;
 517 } identifier_expression_t;
 518
 519 typedef struct {
 520     expression_t expr;
 521     literal_t *literal;
 522 } literal_expression_t;
 523
 524 typedef struct _array_element_t {
 525     int elision;
 526     expression_t *expr;
 527
 528     struct _array_element_t *next;
 529 } array_element_t;
 530
 531 typedef struct {
 532     expression_t expr;
 533     array_element_t *element_list;
 534     int length;
 535 } array_literal_expression_t;
 536
 537 typedef struct _prop_val_t {
 538     literal_t *name;
 539     expression_t *value;
 540
 541     struct _prop_val_t *next;
 542 } prop_val_t;
 543
 544 typedef struct {
 545     expression_t expr;
 546     prop_val_t *property_list;
 547 } property_value_expression_t;
 548
 549 HRESULT function_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 550 HRESULT array_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 551 HRESULT member_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 552 HRESULT call_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 553 HRESULT identifier_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 554 HRESULT array_literal_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 555 HRESULT property_value_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 556
 557 HRESULT binary_and_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 558 HRESULT instanceof_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 559 HRESULT delete_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 560 HRESULT typeof_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 561 HRESULT post_increment_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 562 HRESULT post_decrement_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 563 HRESULT pre_increment_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 564 HRESULT pre_decrement_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 565 HRESULT greater_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 566 HRESULT greatereq_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 567 HRESULT left_shift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 568 HRESULT right_shift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 569 HRESULT right2_shift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 570 HRESULT assign_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 571 HRESULT assign_lshift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 572 HRESULT assign_rshift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 573 HRESULT assign_rrshift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 574 HRESULT assign_add_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 575 HRESULT assign_sub_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 576 HRESULT assign_mul_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 577 HRESULT assign_div_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 578 HRESULT assign_mod_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 579 HRESULT assign_and_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 580 HRESULT assign_or_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 581 HRESULT assign_xor_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 582
 583 HRESULT compiled_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 584
 585 HRESULT compile_subscript(parser_ctx_t*,expression_t*,unsigned*) DECLSPEC_HIDDEN;