reactos/dll/win32/vbscript/parser.y

   1 /*
   2  * Copyright 2011 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 %{
  20
  21 #include "vbscript.h"
  22 #include "parse.h"
  23
  24 #include "wine/debug.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(vbscript);
  27
  28 static int parser_error(parser_ctx_t *,const char*);
  29
  30 static void parse_complete(parser_ctx_t*,BOOL);
  31
  32 static void source_add_statement(parser_ctx_t*,statement_t*);
  33 static void source_add_class(parser_ctx_t*,class_decl_t*);
  34
  35 static void *new_expression(parser_ctx_t*,expression_type_t,size_t);
  36 static expression_t *new_bool_expression(parser_ctx_t*,VARIANT_BOOL);
  37 static expression_t *new_string_expression(parser_ctx_t*,const WCHAR*);
  38 static expression_t *new_long_expression(parser_ctx_t*,expression_type_t,LONG);
  39 static expression_t *new_double_expression(parser_ctx_t*,double);
  40 static expression_t *new_unary_expression(parser_ctx_t*,expression_type_t,expression_t*);
  41 static expression_t *new_binary_expression(parser_ctx_t*,expression_type_t,expression_t*,expression_t*);
  42 static expression_t *new_new_expression(parser_ctx_t*,const WCHAR*);
  43
  44 static member_expression_t *new_member_expression(parser_ctx_t*,expression_t*,const WCHAR*);
  45
  46 static void *new_statement(parser_ctx_t*,statement_type_t,size_t);
  47 static statement_t *new_call_statement(parser_ctx_t*,BOOL,member_expression_t*);
  48 static statement_t *new_assign_statement(parser_ctx_t*,member_expression_t*,expression_t*);
  49 static statement_t *new_set_statement(parser_ctx_t*,member_expression_t*,expression_t*);
  50 static statement_t *new_dim_statement(parser_ctx_t*,dim_decl_t*);
  51 static statement_t *new_while_statement(parser_ctx_t*,statement_type_t,expression_t*,statement_t*);
  52 static statement_t *new_forto_statement(parser_ctx_t*,const WCHAR*,expression_t*,expression_t*,expression_t*,statement_t*);
  53 static statement_t *new_foreach_statement(parser_ctx_t*,const WCHAR*,expression_t*,statement_t*);
  54 static statement_t *new_if_statement(parser_ctx_t*,expression_t*,statement_t*,elseif_decl_t*,statement_t*);
  55 static statement_t *new_function_statement(parser_ctx_t*,function_decl_t*);
  56 static statement_t *new_onerror_statement(parser_ctx_t*,BOOL);
  57 static statement_t *new_const_statement(parser_ctx_t*,const_decl_t*);
  58 static statement_t *new_select_statement(parser_ctx_t*,expression_t*,case_clausule_t*);
  59
  60 static dim_decl_t *new_dim_decl(parser_ctx_t*,const WCHAR*,BOOL,dim_list_t*);
  61 static dim_list_t *new_dim(parser_ctx_t*,unsigned,dim_list_t*);
  62 static elseif_decl_t *new_elseif_decl(parser_ctx_t*,expression_t*,statement_t*);
  63 static function_decl_t *new_function_decl(parser_ctx_t*,const WCHAR*,function_type_t,unsigned,arg_decl_t*,statement_t*);
  64 static arg_decl_t *new_argument_decl(parser_ctx_t*,const WCHAR*,BOOL);
  65 static const_decl_t *new_const_decl(parser_ctx_t*,const WCHAR*,expression_t*);
  66 static case_clausule_t *new_case_clausule(parser_ctx_t*,expression_t*,statement_t*,case_clausule_t*);
  67
  68 static class_decl_t *new_class_decl(parser_ctx_t*);
  69 static class_decl_t *add_class_function(parser_ctx_t*,class_decl_t*,function_decl_t*);
  70 static class_decl_t *add_dim_prop(parser_ctx_t*,class_decl_t*,dim_decl_t*,unsigned);
  71
  72 static statement_t *link_statements(statement_t*,statement_t*);
  73
  74 static const WCHAR propertyW[] = {'p','r','o','p','e','r','t','y',0};
  75
  76 #define STORAGE_IS_PRIVATE    1
  77 #define STORAGE_IS_DEFAULT    2
  78
  79 #define CHECK_ERROR if(((parser_ctx_t*)ctx)->hres != S_OK) YYABORT
  80
  81 %}
  82
  83 %lex-param { parser_ctx_t *ctx }
  84 %parse-param { parser_ctx_t *ctx }
  85 %pure-parser
  86 %start Program
  87
  88 %union {
  89     const WCHAR *string;
  90     statement_t *statement;
  91     expression_t *expression;
  92     member_expression_t *member;
  93     elseif_decl_t *elseif;
  94     dim_decl_t *dim_decl;
  95     dim_list_t *dim_list;
  96     function_decl_t *func_decl;
  97     arg_decl_t *arg_decl;
  98     class_decl_t *class_decl;
  99     const_decl_t *const_decl;
 100     case_clausule_t *case_clausule;
 101     unsigned uint;
 102     LONG lng;
 103     BOOL boolean;
 104     double dbl;
 105 }
 106
 107 %token tEOF tNL tREM tEMPTYBRACKETS
 108 %token tTRUE tFALSE
 109 %token tNOT tAND tOR tXOR tEQV tIMP tNEQ
 110 %token tIS tLTEQ tGTEQ tMOD
 111 %token tCALL tDIM tSUB tFUNCTION tPROPERTY tGET tLET tCONST
 112 %token tIF tELSE tELSEIF tEND tTHEN tEXIT
 113 %token tWHILE tWEND tDO tLOOP tUNTIL tFOR tTO tSTEP tEACH tIN
 114 %token tSELECT tCASE
 115 %token tBYREF tBYVAL
 116 %token tOPTION tEXPLICIT
 117 %token tSTOP
 118 %token tNOTHING tEMPTY tNULL
 119 %token tCLASS tSET tNEW tPUBLIC tPRIVATE tDEFAULT tME
 120 %token tERROR tNEXT tON tRESUME tGOTO
 121 %token <string> tIdentifier tString
 122 %token <lng> tLong tShort
 123 %token <dbl> tDouble
 124
 125 %type <statement> Statement SimpleStatement StatementNl StatementsNl StatementsNl_opt IfStatement Else_opt
 126 %type <expression> Expression LiteralExpression PrimaryExpression EqualityExpression CallExpression
 127 %type <expression> ConcatExpression AdditiveExpression ModExpression IntdivExpression MultiplicativeExpression ExpExpression
 128 %type <expression> NotExpression UnaryExpression AndExpression OrExpression XorExpression EqvExpression
 129 %type <expression> ConstExpression NumericLiteralExpression
 130 %type <member> MemberExpression
 131 %type <expression> Arguments_opt ArgumentList_opt Step_opt ExpressionList
 132 %type <boolean> OptionExplicit_opt DoType
 133 %type <arg_decl> ArgumentsDecl_opt ArgumentDeclList ArgumentDecl
 134 %type <func_decl> FunctionDecl PropertyDecl
 135 %type <elseif> ElseIfs_opt ElseIfs ElseIf
 136 %type <class_decl> ClassDeclaration ClassBody
 137 %type <uint> Storage Storage_opt IntegerValue
 138 %type <dim_decl> DimDeclList DimDecl
 139 %type <dim_list> DimList
 140 %type <const_decl> ConstDecl ConstDeclList
 141 %type <string> Identifier
 142 %type <case_clausule> CaseClausules
 143
 144 %%
 145
 146 Program
 147     : OptionExplicit_opt SourceElements tEOF    { parse_complete(ctx, $1); }
 148
 149 OptionExplicit_opt
 150     : /* empty */                { $$ = FALSE; }
 151     | tOPTION tEXPLICIT tNL      { $$ = TRUE; }
 152
 153 SourceElements
 154     : /* empty */
 155     | SourceElements StatementNl            { source_add_statement(ctx, $2); }
 156     | SourceElements ClassDeclaration       { source_add_class(ctx, $2); }
 157
 158 StatementsNl_opt
 159     : /* empty */                           { $$ = NULL; }
 160     | StatementsNl                          { $$ = $1; }
 161
 162 StatementsNl
 163     : StatementNl                           { $$ = $1; }
 164     | StatementNl StatementsNl              { $$ = link_statements($1, $2); }
 165
 166 StatementNl
 167     : Statement tNL                 { $$ = $1; }
 168
 169 Statement
 170     : ':'                                   { $$ = NULL; }
 171     | ':' Statement                         { $$ = $2; }
 172     | SimpleStatement                       { $$ = $1; }
 173     | SimpleStatement ':' Statement         { $1->next = $3; $$ = $1; }
 174     | SimpleStatement ':'                   { $$ = $1; }
 175
 176 SimpleStatement
 177     : MemberExpression ArgumentList_opt     { $1->args = $2; $$ = new_call_statement(ctx, FALSE, $1); CHECK_ERROR; }
 178     | tCALL MemberExpression Arguments_opt  { $2->args = $3; $$ = new_call_statement(ctx, TRUE, $2); CHECK_ERROR; }
 179     | MemberExpression Arguments_opt '=' Expression
 180                                             { $1->args = $2; $$ = new_assign_statement(ctx, $1, $4); CHECK_ERROR; }
 181     | tDIM DimDeclList                      { $$ = new_dim_statement(ctx, $2); CHECK_ERROR; }
 182     | IfStatement                           { $$ = $1; }
 183     | tWHILE Expression tNL StatementsNl_opt tWEND
 184                                             { $$ = new_while_statement(ctx, STAT_WHILE, $2, $4); CHECK_ERROR; }
 185     | tDO DoType Expression tNL StatementsNl_opt tLOOP
 186                                             { $$ = new_while_statement(ctx, $2 ? STAT_WHILELOOP : STAT_UNTIL, $3, $5);
 187                                               CHECK_ERROR; }
 188     | tDO tNL StatementsNl_opt tLOOP DoType Expression
 189                                             { $$ = new_while_statement(ctx, $5 ? STAT_DOWHILE : STAT_DOUNTIL, $6, $3);
 190                                               CHECK_ERROR; }
 191     | tDO tNL StatementsNl_opt tLOOP        { $$ = new_while_statement(ctx, STAT_DOWHILE, NULL, $3); CHECK_ERROR; }
 192     | FunctionDecl                          { $$ = new_function_statement(ctx, $1); CHECK_ERROR; }
 193     | tEXIT tDO                             { $$ = new_statement(ctx, STAT_EXITDO, 0); CHECK_ERROR; }
 194     | tEXIT tFOR                            { $$ = new_statement(ctx, STAT_EXITFOR, 0); CHECK_ERROR; }
 195     | tEXIT tFUNCTION                       { $$ = new_statement(ctx, STAT_EXITFUNC, 0); CHECK_ERROR; }
 196     | tEXIT tPROPERTY                       { $$ = new_statement(ctx, STAT_EXITPROP, 0); CHECK_ERROR; }
 197     | tEXIT tSUB                            { $$ = new_statement(ctx, STAT_EXITSUB, 0); CHECK_ERROR; }
 198     | tSET MemberExpression Arguments_opt '=' Expression
 199                                             { $2->args = $3; $$ = new_set_statement(ctx, $2, $5); CHECK_ERROR; }
 200     | tSTOP                                 { $$ = new_statement(ctx, STAT_STOP, 0); CHECK_ERROR; }
 201     | tON tERROR tRESUME tNEXT              { $$ = new_onerror_statement(ctx, TRUE); CHECK_ERROR; }
 202     | tON tERROR tGOTO '0'                  { $$ = new_onerror_statement(ctx, FALSE); CHECK_ERROR; }
 203     | tCONST ConstDeclList                  { $$ = new_const_statement(ctx, $2); CHECK_ERROR; }
 204     | tFOR Identifier '=' Expression tTO Expression Step_opt tNL StatementsNl_opt tNEXT
 205                                             { $$ = new_forto_statement(ctx, $2, $4, $6, $7, $9); CHECK_ERROR; }
 206     | tFOR tEACH Identifier tIN Expression tNL StatementsNl_opt tNEXT
 207                                             { $$ = new_foreach_statement(ctx, $3, $5, $7); }
 208     | tSELECT tCASE Expression StSep CaseClausules tEND tSELECT
 209                                             { $$ = new_select_statement(ctx, $3, $5); }
 210
 211 MemberExpression
 212     : Identifier                            { $$ = new_member_expression(ctx, NULL, $1); CHECK_ERROR; }
 213     | CallExpression '.' Identifier         { $$ = new_member_expression(ctx, $1, $3); CHECK_ERROR; }
 214
 215 DimDeclList
 216     : DimDecl                               { $$ = $1; }
 217     | DimDecl ',' DimDeclList               { $1->next = $3; $$ = $1; }
 218
 219 DimDecl
 220     : Identifier                            { $$ = new_dim_decl(ctx, $1, FALSE, NULL); CHECK_ERROR; }
 221     | Identifier '(' DimList ')'            { $$ = new_dim_decl(ctx, $1, TRUE, $3); CHECK_ERROR; }
 222     | Identifier tEMPTYBRACKETS             { $$ = new_dim_decl(ctx, $1, TRUE, NULL); CHECK_ERROR; }
 223
 224 DimList
 225     : IntegerValue                          { $$ = new_dim(ctx, $1, NULL); }
 226     | IntegerValue ',' DimList              { $$ = new_dim(ctx, $1, $3); }
 227
 228 ConstDeclList
 229     : ConstDecl                             { $$ = $1; }
 230     | ConstDecl ',' ConstDeclList           { $1->next = $3; $$ = $1; }
 231
 232 ConstDecl
 233     : Identifier '=' ConstExpression        { $$ = new_const_decl(ctx, $1, $3); CHECK_ERROR; }
 234
 235 ConstExpression
 236     : LiteralExpression                     { $$ = $1; }
 237     | '-' NumericLiteralExpression          { $$ = new_unary_expression(ctx, EXPR_NEG, $2); CHECK_ERROR; }
 238
 239 DoType
 240     : tWHILE        { $$ = TRUE; }
 241     | tUNTIL        { $$ = FALSE; }
 242
 243 Step_opt
 244     : /* empty */                           { $$ = NULL;}
 245     | tSTEP Expression                      { $$ = $2; }
 246
 247 IfStatement
 248     : tIF Expression tTHEN tNL StatementsNl_opt ElseIfs_opt Else_opt tEND tIF
 249                                             { $$ = new_if_statement(ctx, $2, $5, $6, $7); CHECK_ERROR; }
 250     | tIF Expression tTHEN Statement        { $$ = new_if_statement(ctx, $2, $4, NULL, NULL); CHECK_ERROR; }
 251     | tIF Expression tTHEN Statement tELSE Statement EndIf_opt
 252                                             { $$ = new_if_statement(ctx, $2, $4, NULL, $6); CHECK_ERROR; }
 253
 254 EndIf_opt
 255     : /* empty */
 256     | tEND tIF
 257
 258 ElseIfs_opt
 259     : /* empty */                           { $$ = NULL; }
 260     | ElseIfs                               { $$ = $1; }
 261
 262 ElseIfs
 263     : ElseIf                                { $$ = $1; }
 264     | ElseIf ElseIfs                        { $1->next = $2; $$ = $1; }
 265
 266 ElseIf
 267     : tELSEIF Expression tTHEN tNL StatementsNl_opt
 268                                             { $$ = new_elseif_decl(ctx, $2, $5); }
 269
 270 Else_opt
 271     : /* empty */                           { $$ = NULL; }
 272     | tELSE tNL StatementsNl_opt            { $$ = $3; }
 273
 274 CaseClausules
 275     : /* empty */                          { $$ = NULL; }
 276     | tCASE tELSE StSep StatementsNl       { $$ = new_case_clausule(ctx, NULL, $4, NULL); }
 277     | tCASE ExpressionList StSep StatementsNl_opt CaseClausules
 278                                            { $$ = new_case_clausule(ctx, $2, $4, $5); }
 279
 280 Arguments_opt
 281     : EmptyBrackets_opt             { $$ = NULL; }
 282     | '(' ExpressionList ')'        { $$ = $2; }
 283
 284 ArgumentList_opt
 285     : EmptyBrackets_opt             { $$ = NULL; }
 286     | ExpressionList                { $$ = $1; }
 287
 288 EmptyBrackets_opt
 289     : /* empty */
 290     | tEMPTYBRACKETS
 291
 292 ExpressionList
 293     : Expression                    { $$ = $1; }
 294     | Expression ',' ExpressionList { $1->next = $3; $$ = $1; }
 295
 296 Expression
 297     : EqvExpression                             { $$ = $1; }
 298     | Expression tIMP EqvExpression             { $$ = new_binary_expression(ctx, EXPR_IMP, $1, $3); CHECK_ERROR; }
 299
 300 EqvExpression
 301     : XorExpression                             { $$ = $1; }
 302     | EqvExpression tEQV XorExpression          { $$ = new_binary_expression(ctx, EXPR_EQV, $1, $3); CHECK_ERROR; }
 303
 304 XorExpression
 305     : OrExpression                              { $$ = $1; }
 306     | XorExpression tXOR OrExpression           { $$ = new_binary_expression(ctx, EXPR_XOR, $1, $3); CHECK_ERROR; }
 307
 308 OrExpression
 309     : AndExpression                             { $$ = $1; }
 310     | OrExpression tOR AndExpression            { $$ = new_binary_expression(ctx, EXPR_OR, $1, $3); CHECK_ERROR; }
 311
 312 AndExpression
 313     : NotExpression                             { $$ = $1; }
 314     | AndExpression tAND NotExpression          { $$ = new_binary_expression(ctx, EXPR_AND, $1, $3); CHECK_ERROR; }
 315
 316 NotExpression
 317     : EqualityExpression            { $$ = $1; }
 318     | tNOT NotExpression            { $$ = new_unary_expression(ctx, EXPR_NOT, $2); CHECK_ERROR; }
 319
 320 EqualityExpression
 321     : ConcatExpression                          { $$ = $1; }
 322     | EqualityExpression '=' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_EQUAL, $1, $3); CHECK_ERROR; }
 323     | EqualityExpression tNEQ ConcatExpression  { $$ = new_binary_expression(ctx, EXPR_NEQUAL, $1, $3); CHECK_ERROR; }
 324     | EqualityExpression '>' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_GT, $1, $3); CHECK_ERROR; }
 325     | EqualityExpression '<' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_LT, $1, $3); CHECK_ERROR; }
 326     | EqualityExpression tGTEQ ConcatExpression { $$ = new_binary_expression(ctx, EXPR_GTEQ, $1, $3); CHECK_ERROR; }
 327     | EqualityExpression tLTEQ ConcatExpression { $$ = new_binary_expression(ctx, EXPR_LTEQ, $1, $3); CHECK_ERROR; }
 328     | EqualityExpression tIS ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_IS, $1, $3); CHECK_ERROR; }
 329
 330 ConcatExpression
 331     : AdditiveExpression                        { $$ = $1; }
 332     | ConcatExpression '&' AdditiveExpression   { $$ = new_binary_expression(ctx, EXPR_CONCAT, $1, $3); CHECK_ERROR; }
 333
 334 AdditiveExpression
 335     : ModExpression                             { $$ = $1; }
 336     | AdditiveExpression '+' ModExpression      { $$ = new_binary_expression(ctx, EXPR_ADD, $1, $3); CHECK_ERROR; }
 337     | AdditiveExpression '-' ModExpression      { $$ = new_binary_expression(ctx, EXPR_SUB, $1, $3); CHECK_ERROR; }
 338
 339 ModExpression
 340     : IntdivExpression                          { $$ = $1; }
 341     | ModExpression tMOD IntdivExpression       { $$ = new_binary_expression(ctx, EXPR_MOD, $1, $3); CHECK_ERROR; }
 342
 343 IntdivExpression
 344     : MultiplicativeExpression                  { $$ = $1; }
 345     | IntdivExpression '\\' MultiplicativeExpression
 346                                                 { $$ = new_binary_expression(ctx, EXPR_IDIV, $1, $3); CHECK_ERROR; }
 347
 348 MultiplicativeExpression
 349     : ExpExpression                             { $$ = $1; }
 350     | MultiplicativeExpression '*' ExpExpression
 351                                                 { $$ = new_binary_expression(ctx, EXPR_MUL, $1, $3); CHECK_ERROR; }
 352     | MultiplicativeExpression '/' ExpExpression
 353                                                 { $$ = new_binary_expression(ctx, EXPR_DIV, $1, $3); CHECK_ERROR; }
 354
 355 ExpExpression
 356     : UnaryExpression                           { $$ = $1; }
 357     | ExpExpression '^' UnaryExpression         { $$ = new_binary_expression(ctx, EXPR_EXP, $1, $3); CHECK_ERROR; }
 358
 359 UnaryExpression
 360     : LiteralExpression             { $$ = $1; }
 361     | CallExpression                { $$ = $1; }
 362     | tNEW Identifier               { $$ = new_new_expression(ctx, $2); CHECK_ERROR; }
 363     | '-' UnaryExpression           { $$ = new_unary_expression(ctx, EXPR_NEG, $2); CHECK_ERROR; }
 364
 365 CallExpression
 366     : PrimaryExpression                 { $$ = $1; }
 367     | MemberExpression Arguments_opt    { $1->args = $2; $$ = &$1->expr; }
 368
 369 LiteralExpression
 370     : tTRUE                         { $$ = new_bool_expression(ctx, VARIANT_TRUE); CHECK_ERROR; }
 371     | tFALSE                        { $$ = new_bool_expression(ctx, VARIANT_FALSE); CHECK_ERROR; }
 372     | tString                       { $$ = new_string_expression(ctx, $1); CHECK_ERROR; }
 373     | NumericLiteralExpression      { $$ = $1; }
 374     | tEMPTY                        { $$ = new_expression(ctx, EXPR_EMPTY, 0); CHECK_ERROR; }
 375     | tNULL                         { $$ = new_expression(ctx, EXPR_NULL, 0); CHECK_ERROR; }
 376     | tNOTHING                      { $$ = new_expression(ctx, EXPR_NOTHING, 0); CHECK_ERROR; }
 377
 378 NumericLiteralExpression
 379     : tShort                        { $$ = new_long_expression(ctx, EXPR_USHORT, $1); CHECK_ERROR; }
 380     | '0'                           { $$ = new_long_expression(ctx, EXPR_USHORT, 0); CHECK_ERROR; }
 381     | tLong                         { $$ = new_long_expression(ctx, EXPR_ULONG, $1); CHECK_ERROR; }
 382     | tDouble                       { $$ = new_double_expression(ctx, $1); CHECK_ERROR; }
 383
 384 IntegerValue
 385     : tShort                        { $$ = $1; }
 386     | '0'                           { $$ = 0; }
 387     | tLong                         { $$ = $1; }
 388
 389 PrimaryExpression
 390     : '(' Expression ')'            { $$ = new_unary_expression(ctx, EXPR_BRACKETS, $2); }
 391     | tME                           { $$ = new_expression(ctx, EXPR_ME, 0); CHECK_ERROR; }
 392
 393 ClassDeclaration
 394     : tCLASS Identifier tNL ClassBody tEND tCLASS tNL       { $4->name = $2; $$ = $4; }
 395
 396 ClassBody
 397     : /* empty */                               { $$ = new_class_decl(ctx); }
 398     | FunctionDecl tNL ClassBody                { $$ = add_class_function(ctx, $3, $1); CHECK_ERROR; }
 399     /* FIXME: We should use DimDecl here to support arrays, but that conflicts with PropertyDecl. */
 400     | Storage tIdentifier tNL ClassBody         { dim_decl_t *dim_decl = new_dim_decl(ctx, $2, FALSE, NULL); CHECK_ERROR;
 401                                                   $$ = add_dim_prop(ctx, $4, dim_decl, $1); CHECK_ERROR; }
 402     | tDIM DimDecl tNL ClassBody                { $$ = add_dim_prop(ctx, $4, $2, 0); CHECK_ERROR; }
 403     | PropertyDecl tNL ClassBody                { $$ = add_class_function(ctx, $3, $1); CHECK_ERROR; }
 404
 405 PropertyDecl
 406     : Storage_opt tPROPERTY tGET tIdentifier ArgumentsDecl_opt tNL StatementsNl_opt tEND tPROPERTY
 407                                     { $$ = new_function_decl(ctx, $4, FUNC_PROPGET, $1, $5, $7); CHECK_ERROR; }
 408     | Storage_opt tPROPERTY tLET tIdentifier '(' ArgumentDecl ')' tNL StatementsNl_opt tEND tPROPERTY
 409                                     { $$ = new_function_decl(ctx, $4, FUNC_PROPLET, $1, $6, $9); CHECK_ERROR; }
 410     | Storage_opt tPROPERTY tSET tIdentifier '(' ArgumentDecl ')' tNL StatementsNl_opt tEND tPROPERTY
 411                                     { $$ = new_function_decl(ctx, $4, FUNC_PROPSET, $1, $6, $9); CHECK_ERROR; }
 412
 413 FunctionDecl
 414     : Storage_opt tSUB Identifier ArgumentsDecl_opt tNL StatementsNl_opt tEND tSUB
 415                                     { $$ = new_function_decl(ctx, $3, FUNC_SUB, $1, $4, $6); CHECK_ERROR; }
 416     | Storage_opt tFUNCTION Identifier ArgumentsDecl_opt tNL StatementsNl_opt tEND tFUNCTION
 417                                     { $$ = new_function_decl(ctx, $3, FUNC_FUNCTION, $1, $4, $6); CHECK_ERROR; }
 418
 419 Storage_opt
 420     : /* empty*/                    { $$ = 0; }
 421     | Storage                       { $$ = $1; }
 422
 423 Storage
 424     : tPUBLIC tDEFAULT              { $$ = STORAGE_IS_DEFAULT; }
 425     | tPUBLIC                       { $$ = 0; }
 426     | tPRIVATE                      { $$ = STORAGE_IS_PRIVATE; }
 427
 428 ArgumentsDecl_opt
 429     : EmptyBrackets_opt                         { $$ = NULL; }
 430     | '(' ArgumentDeclList ')'                  { $$ = $2; }
 431
 432 ArgumentDeclList
 433     : ArgumentDecl                              { $$ = $1; }
 434     | ArgumentDecl ',' ArgumentDeclList         { $1->next = $3; $$ = $1; }
 435
 436 ArgumentDecl
 437     : Identifier EmptyBrackets_opt              { $$ = new_argument_decl(ctx, $1, TRUE); }
 438     | tBYREF Identifier EmptyBrackets_opt       { $$ = new_argument_decl(ctx, $2, TRUE); }
 439     | tBYVAL Identifier EmptyBrackets_opt       { $$ = new_argument_decl(ctx, $2, FALSE); }
 440
 441 /* 'property' may be both keyword and identifier, depending on context */
 442 Identifier
 443     : tIdentifier    { $$ = $1; }
 444     | tPROPERTY      { $$ = propertyW; }
 445
 446 /* Some statements accept both new line and ':' as a separator */
 447 StSep
 448     : tNL
 449     | ':'
 450
 451 %%
 452
 453 static int parser_error(parser_ctx_t *ctx, const char *str)
 454 {
 455     return 0;
 456 }
 457
 458 static void source_add_statement(parser_ctx_t *ctx, statement_t *stat)
 459 {
 460     if(!stat)
 461         return;
 462
 463     if(ctx->stats) {
 464         ctx->stats_tail->next = stat;
 465         ctx->stats_tail = stat;
 466     }else {
 467         ctx->stats = ctx->stats_tail = stat;
 468     }
 469 }
 470
 471 static void source_add_class(parser_ctx_t *ctx, class_decl_t *class_decl)
 472 {
 473     class_decl->next = ctx->class_decls;
 474     ctx->class_decls = class_decl;
 475 }
 476
 477 static void parse_complete(parser_ctx_t *ctx, BOOL option_explicit)
 478 {
 479     ctx->parse_complete = TRUE;
 480     ctx->option_explicit = option_explicit;
 481 }
 482
 483 static void *new_expression(parser_ctx_t *ctx, expression_type_t type, size_t size)
 484 {
 485     expression_t *expr;
 486
 487     expr = parser_alloc(ctx, size ? size : sizeof(*expr));
 488     if(expr) {
 489         expr->type = type;
 490         expr->next = NULL;
 491     }
 492
 493     return expr;
 494 }
 495
 496 static expression_t *new_bool_expression(parser_ctx_t *ctx, VARIANT_BOOL value)
 497 {
 498     bool_expression_t *expr;
 499
 500     expr = new_expression(ctx, EXPR_BOOL, sizeof(*expr));
 501     if(!expr)
 502         return NULL;
 503
 504     expr->value = value;
 505     return &expr->expr;
 506 }
 507
 508 static expression_t *new_string_expression(parser_ctx_t *ctx, const WCHAR *value)
 509 {
 510     string_expression_t *expr;
 511
 512     expr = new_expression(ctx, EXPR_STRING, sizeof(*expr));
 513     if(!expr)
 514         return NULL;
 515
 516     expr->value = value;
 517     return &expr->expr;
 518 }
 519
 520 static expression_t *new_long_expression(parser_ctx_t *ctx, expression_type_t type, LONG value)
 521 {
 522     int_expression_t *expr;
 523
 524     expr = new_expression(ctx, type, sizeof(*expr));
 525     if(!expr)
 526         return NULL;
 527
 528     expr->value = value;
 529     return &expr->expr;
 530 }
 531
 532 static expression_t *new_double_expression(parser_ctx_t *ctx, double value)
 533 {
 534     double_expression_t *expr;
 535
 536     expr = new_expression(ctx, EXPR_DOUBLE, sizeof(*expr));
 537     if(!expr)
 538         return NULL;
 539
 540     expr->value = value;
 541     return &expr->expr;
 542 }
 543
 544 static expression_t *new_unary_expression(parser_ctx_t *ctx, expression_type_t type, expression_t *subexpr)
 545 {
 546     unary_expression_t *expr;
 547
 548     expr = new_expression(ctx, type, sizeof(*expr));
 549     if(!expr)
 550         return NULL;
 551
 552     expr->subexpr = subexpr;
 553     return &expr->expr;
 554 }
 555
 556 static expression_t *new_binary_expression(parser_ctx_t *ctx, expression_type_t type, expression_t *left, expression_t *right)
 557 {
 558     binary_expression_t *expr;
 559
 560     expr = new_expression(ctx, type, sizeof(*expr));
 561     if(!expr)
 562         return NULL;
 563
 564     expr->left = left;
 565     expr->right = right;
 566     return &expr->expr;
 567 }
 568
 569 static member_expression_t *new_member_expression(parser_ctx_t *ctx, expression_t *obj_expr, const WCHAR *identifier)
 570 {
 571     member_expression_t *expr;
 572
 573     expr = new_expression(ctx, EXPR_MEMBER, sizeof(*expr));
 574     if(!expr)
 575         return NULL;
 576
 577     expr->obj_expr = obj_expr;
 578     expr->identifier = identifier;
 579     expr->args = NULL;
 580     return expr;
 581 }
 582
 583 static expression_t *new_new_expression(parser_ctx_t *ctx, const WCHAR *identifier)
 584 {
 585     string_expression_t *expr;
 586
 587     expr = new_expression(ctx, EXPR_NEW, sizeof(*expr));
 588     if(!expr)
 589         return NULL;
 590
 591     expr->value = identifier;
 592     return &expr->expr;
 593 }
 594
 595 static void *new_statement(parser_ctx_t *ctx, statement_type_t type, size_t size)
 596 {
 597     statement_t *stat;
 598
 599     stat = parser_alloc(ctx, size ? size : sizeof(*stat));
 600     if(stat) {
 601         stat->type = type;
 602         stat->next = NULL;
 603     }
 604
 605     return stat;
 606 }
 607
 608 static statement_t *new_call_statement(parser_ctx_t *ctx, BOOL is_strict, member_expression_t *expr)
 609 {
 610     call_statement_t *stat;
 611
 612     stat = new_statement(ctx, STAT_CALL, sizeof(*stat));
 613     if(!stat)
 614         return NULL;
 615
 616     stat->expr = expr;
 617     stat->is_strict = is_strict;
 618     return &stat->stat;
 619 }
 620
 621 static statement_t *new_assign_statement(parser_ctx_t *ctx, member_expression_t *left, expression_t *right)
 622 {
 623     assign_statement_t *stat;
 624
 625     stat = new_statement(ctx, STAT_ASSIGN, sizeof(*stat));
 626     if(!stat)
 627         return NULL;
 628
 629     stat->member_expr = left;
 630     stat->value_expr = right;
 631     return &stat->stat;
 632 }
 633
 634 static statement_t *new_set_statement(parser_ctx_t *ctx, member_expression_t *left, expression_t *right)
 635 {
 636     assign_statement_t *stat;
 637
 638     stat = new_statement(ctx, STAT_SET, sizeof(*stat));
 639     if(!stat)
 640         return NULL;
 641
 642     stat->member_expr = left;
 643     stat->value_expr = right;
 644     return &stat->stat;
 645 }
 646
 647 static dim_decl_t *new_dim_decl(parser_ctx_t *ctx, const WCHAR *name, BOOL is_array, dim_list_t *dims)
 648 {
 649     dim_decl_t *decl;
 650
 651     decl = parser_alloc(ctx, sizeof(*decl));
 652     if(!decl)
 653         return NULL;
 654
 655     decl->name = name;
 656     decl->is_array = is_array;
 657     decl->dims = dims;
 658     decl->next = NULL;
 659     return decl;
 660 }
 661
 662 static dim_list_t *new_dim(parser_ctx_t *ctx, unsigned val, dim_list_t *next)
 663 {
 664     dim_list_t *ret;
 665
 666     ret = parser_alloc(ctx, sizeof(*ret));
 667     if(!ret)
 668         return NULL;
 669
 670     ret->val = val;
 671     ret->next = next;
 672     return ret;
 673 }
 674
 675 static statement_t *new_dim_statement(parser_ctx_t *ctx, dim_decl_t *decls)
 676 {
 677     dim_statement_t *stat;
 678
 679     stat = new_statement(ctx, STAT_DIM, sizeof(*stat));
 680     if(!stat)
 681         return NULL;
 682
 683     stat->dim_decls = decls;
 684     return &stat->stat;
 685 }
 686
 687 static elseif_decl_t *new_elseif_decl(parser_ctx_t *ctx, expression_t *expr, statement_t *stat)
 688 {
 689     elseif_decl_t *decl;
 690
 691     decl = parser_alloc(ctx, sizeof(*decl));
 692     if(!decl)
 693         return NULL;
 694
 695     decl->expr = expr;
 696     decl->stat = stat;
 697     decl->next = NULL;
 698     return decl;
 699 }
 700
 701 static statement_t *new_while_statement(parser_ctx_t *ctx, statement_type_t type, expression_t *expr, statement_t *body)
 702 {
 703     while_statement_t *stat;
 704
 705     stat = new_statement(ctx, type, sizeof(*stat));
 706     if(!stat)
 707         return NULL;
 708
 709     stat->expr = expr;
 710     stat->body = body;
 711     return &stat->stat;
 712 }
 713
 714 static statement_t *new_forto_statement(parser_ctx_t *ctx, const WCHAR *identifier, expression_t *from_expr,
 715         expression_t *to_expr, expression_t *step_expr, statement_t *body)
 716 {
 717     forto_statement_t *stat;
 718
 719     stat = new_statement(ctx, STAT_FORTO, sizeof(*stat));
 720     if(!stat)
 721         return NULL;
 722
 723     stat->identifier = identifier;
 724     stat->from_expr = from_expr;
 725     stat->to_expr = to_expr;
 726     stat->step_expr = step_expr;
 727     stat->body = body;
 728     return &stat->stat;
 729 }
 730
 731 static statement_t *new_foreach_statement(parser_ctx_t *ctx, const WCHAR *identifier, expression_t *group_expr,
 732         statement_t *body)
 733 {
 734     foreach_statement_t *stat;
 735
 736     stat = new_statement(ctx, STAT_FOREACH, sizeof(*stat));
 737     if(!stat)
 738         return NULL;
 739
 740     stat->identifier = identifier;
 741     stat->group_expr = group_expr;
 742     stat->body = body;
 743     return &stat->stat;
 744 }
 745
 746 static statement_t *new_if_statement(parser_ctx_t *ctx, expression_t *expr, statement_t *if_stat, elseif_decl_t *elseif_decl,
 747         statement_t *else_stat)
 748 {
 749     if_statement_t *stat;
 750
 751     stat = new_statement(ctx, STAT_IF, sizeof(*stat));
 752     if(!stat)
 753         return NULL;
 754
 755     stat->expr = expr;
 756     stat->if_stat = if_stat;
 757     stat->elseifs = elseif_decl;
 758     stat->else_stat = else_stat;
 759     return &stat->stat;
 760 }
 761
 762 static statement_t *new_select_statement(parser_ctx_t *ctx, expression_t *expr, case_clausule_t *case_clausules)
 763 {
 764     select_statement_t *stat;
 765
 766     stat = new_statement(ctx, STAT_SELECT, sizeof(*stat));
 767     if(!stat)
 768         return NULL;
 769
 770     stat->expr = expr;
 771     stat->case_clausules = case_clausules;
 772     return &stat->stat;
 773 }
 774
 775 static case_clausule_t *new_case_clausule(parser_ctx_t *ctx, expression_t *expr, statement_t *stat, case_clausule_t *next)
 776 {
 777     case_clausule_t *ret;
 778
 779     ret = parser_alloc(ctx, sizeof(*ret));
 780     if(!ret)
 781         return NULL;
 782
 783     ret->expr = expr;
 784     ret->stat = stat;
 785     ret->next = next;
 786     return ret;
 787 }
 788
 789 static statement_t *new_onerror_statement(parser_ctx_t *ctx, BOOL resume_next)
 790 {
 791     onerror_statement_t *stat;
 792
 793     stat = new_statement(ctx, STAT_ONERROR, sizeof(*stat));
 794     if(!stat)
 795         return NULL;
 796
 797     stat->resume_next = resume_next;
 798     return &stat->stat;
 799 }
 800
 801 static arg_decl_t *new_argument_decl(parser_ctx_t *ctx, const WCHAR *name, BOOL by_ref)
 802 {
 803     arg_decl_t *arg_decl;
 804
 805     arg_decl = parser_alloc(ctx, sizeof(*arg_decl));
 806     if(!arg_decl)
 807         return NULL;
 808
 809     arg_decl->name = name;
 810     arg_decl->by_ref = by_ref;
 811     arg_decl->next = NULL;
 812     return arg_decl;
 813 }
 814
 815 static function_decl_t *new_function_decl(parser_ctx_t *ctx, const WCHAR *name, function_type_t type,
 816         unsigned storage_flags, arg_decl_t *arg_decl, statement_t *body)
 817 {
 818     function_decl_t *decl;
 819
 820     if(storage_flags & STORAGE_IS_DEFAULT) {
 821         if(type == FUNC_PROPGET) {
 822             type = FUNC_DEFGET;
 823         }else {
 824             FIXME("Invalid default property\n");
 825             ctx->hres = E_FAIL;
 826             return NULL;
 827         }
 828     }
 829
 830     decl = parser_alloc(ctx, sizeof(*decl));
 831     if(!decl)
 832         return NULL;
 833
 834     decl->name = name;
 835     decl->type = type;
 836     decl->is_public = !(storage_flags & STORAGE_IS_PRIVATE);
 837     decl->args = arg_decl;
 838     decl->body = body;
 839     decl->next = NULL;
 840     decl->next_prop_func = NULL;
 841     return decl;
 842 }
 843
 844 static statement_t *new_function_statement(parser_ctx_t *ctx, function_decl_t *decl)
 845 {
 846     function_statement_t *stat;
 847
 848     stat = new_statement(ctx, STAT_FUNC, sizeof(*stat));
 849     if(!stat)
 850         return NULL;
 851
 852     stat->func_decl = decl;
 853     return &stat->stat;
 854 }
 855
 856 static class_decl_t *new_class_decl(parser_ctx_t *ctx)
 857 {
 858     class_decl_t *class_decl;
 859
 860     class_decl = parser_alloc(ctx, sizeof(*class_decl));
 861     if(!class_decl)
 862         return NULL;
 863
 864     class_decl->funcs = NULL;
 865     class_decl->props = NULL;
 866     class_decl->next = NULL;
 867     return class_decl;
 868 }
 869
 870 static class_decl_t *add_class_function(parser_ctx_t *ctx, class_decl_t *class_decl, function_decl_t *decl)
 871 {
 872     function_decl_t *iter;
 873
 874     for(iter = class_decl->funcs; iter; iter = iter->next) {
 875         if(!strcmpiW(iter->name, decl->name)) {
 876             if(decl->type == FUNC_SUB || decl->type == FUNC_FUNCTION) {
 877                 FIXME("Redefinition of %s::%s\n", debugstr_w(class_decl->name), debugstr_w(decl->name));
 878                 ctx->hres = E_FAIL;
 879                 return NULL;
 880             }
 881
 882             while(1) {
 883                 if(iter->type == decl->type) {
 884                     FIXME("Redefinition of %s::%s\n", debugstr_w(class_decl->name), debugstr_w(decl->name));
 885                     ctx->hres = E_FAIL;
 886                     return NULL;
 887                 }
 888                 if(!iter->next_prop_func)
 889                     break;
 890                 iter = iter->next_prop_func;
 891             }
 892
 893             iter->next_prop_func = decl;
 894             return class_decl;
 895         }
 896     }
 897
 898     decl->next = class_decl->funcs;
 899     class_decl->funcs = decl;
 900     return class_decl;
 901 }
 902
 903 static class_decl_t *add_dim_prop(parser_ctx_t *ctx, class_decl_t *class_decl, dim_decl_t *dim_decl, unsigned storage_flags)
 904 {
 905     if(storage_flags & STORAGE_IS_DEFAULT) {
 906         FIXME("variant prop van't be default value\n");
 907         ctx->hres = E_FAIL;
 908         return NULL;
 909     }
 910
 911     dim_decl->is_public = !(storage_flags & STORAGE_IS_PRIVATE);
 912     dim_decl->next = class_decl->props;
 913     class_decl->props = dim_decl;
 914     return class_decl;
 915 }
 916
 917 static const_decl_t *new_const_decl(parser_ctx_t *ctx, const WCHAR *name, expression_t *expr)
 918 {
 919     const_decl_t *decl;
 920
 921     decl = parser_alloc(ctx, sizeof(*decl));
 922     if(!decl)
 923         return NULL;
 924
 925     decl->name = name;
 926     decl->value_expr = expr;
 927     decl->next = NULL;
 928     return decl;
 929 }
 930
 931 static statement_t *new_const_statement(parser_ctx_t *ctx, const_decl_t *decls)
 932 {
 933     const_statement_t *stat;
 934
 935     stat = new_statement(ctx, STAT_CONST, sizeof(*stat));
 936     if(!stat)
 937         return NULL;
 938
 939     stat->decls = decls;
 940     return &stat->stat;
 941 }
 942
 943 static statement_t *link_statements(statement_t *head, statement_t *tail)
 944 {
 945     statement_t *iter;
 946
 947     for(iter = head; iter->next; iter = iter->next);
 948     iter->next = tail;
 949
 950     return head;
 951 }
 952
 953 void *parser_alloc(parser_ctx_t *ctx, size_t size)
 954 {
 955     void *ret;
 956
 957     ret = heap_pool_alloc(&ctx->heap, size);
 958     if(!ret)
 959         ctx->hres = E_OUTOFMEMORY;
 960     return ret;
 961 }
 962
 963 HRESULT parse_script(parser_ctx_t *ctx, const WCHAR *code, const WCHAR *delimiter)
 964 {
 965     const WCHAR html_delimiterW[] = {'<','/','s','c','r','i','p','t','>',0};
 966
 967     ctx->code = ctx->ptr = code;
 968     ctx->end = ctx->code + strlenW(ctx->code);
 969
 970     heap_pool_init(&ctx->heap);
 971
 972     ctx->parse_complete = FALSE;
 973     ctx->hres = S_OK;
 974
 975     ctx->last_token = tNL;
 976     ctx->last_nl = 0;
 977     ctx->stats = ctx->stats_tail = NULL;
 978     ctx->class_decls = NULL;
 979     ctx->option_explicit = FALSE;
 980     ctx->is_html = delimiter && !strcmpiW(delimiter, html_delimiterW);
 981
 982     parser_parse(ctx);
 983
 984     if(FAILED(ctx->hres))
 985         return ctx->hres;
 986     if(!ctx->parse_complete) {
 987         FIXME("parser failed around %s\n", debugstr_w(ctx->code+20 > ctx->ptr ? ctx->code : ctx->ptr-20));
 988         return E_FAIL;
 989     }
 990
 991     return S_OK;
 992 }
 993
 994 void parser_release(parser_ctx_t *ctx)
 995 {
 996     heap_pool_free(&ctx->heap);
 997 }