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 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                           { $$ = $1; }
 183     | tWHILE Expression StSep StatementsNl_opt tWEND
 184                                             { $$ = new_while_statement(ctx, STAT_WHILE, $2, $4); CHECK_ERROR; }
 185     | tDO DoType Expression StSep StatementsNl_opt tLOOP
 186                                             { $$ = new_while_statement(ctx, $2 ? STAT_WHILELOOP : STAT_UNTIL, $3, $5);
 187                                               CHECK_ERROR; }
 188     | tDO StSep StatementsNl_opt tLOOP DoType Expression
 189                                             { $$ = new_while_statement(ctx, $5 ? STAT_DOWHILE : STAT_DOUNTIL, $6, $3);
 190                                               CHECK_ERROR; }
 191     | tDO StSep 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 StSep StatementsNl_opt tNEXT
 205                                             { $$ = new_forto_statement(ctx, $2, $4, $6, $7, $9); CHECK_ERROR; }
 206     | tFOR tEACH Identifier tIN Expression StSep StatementsNl_opt tNEXT
 207                                             { $$ = 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 EndIf_opt { $$ = new_if_statement(ctx, $2, $4, NULL, NULL); CHECK_ERROR; }
 251     | tIF Expression tTHEN Statement tELSE Statement EndIf_opt
 252                                                { $$ = 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             { $$ = NULL; }
 282     | '(' ArgumentList ')'          { $$ = $2; }
 283
 284 ArgumentList_opt
 285     : EmptyBrackets_opt             { $$ = NULL; }
 286     | ArgumentList                  { $$ = $1; }
 287
 288 ArgumentList
 289     : Expression                    { $$ = $1; }
 290     | Expression ',' ArgumentList   { $1->next = $3; $$ = $1; }
 291     | ',' ArgumentList              { $$ = new_expression(ctx, EXPR_NOARG, 0); CHECK_ERROR; $$->next = $2; }
 292
 293 EmptyBrackets_opt
 294     : /* empty */
 295     | tEMPTYBRACKETS
 296
 297 ExpressionList
 298     : Expression                    { $$ = $1; }
 299     | Expression ',' ExpressionList { $1->next = $3; $$ = $1; }
 300
 301 Expression
 302     : EqvExpression                             { $$ = $1; }
 303     | Expression tIMP EqvExpression             { $$ = new_binary_expression(ctx, EXPR_IMP, $1, $3); CHECK_ERROR; }
 304
 305 EqvExpression
 306     : XorExpression                             { $$ = $1; }
 307     | EqvExpression tEQV XorExpression          { $$ = new_binary_expression(ctx, EXPR_EQV, $1, $3); CHECK_ERROR; }
 308
 309 XorExpression
 310     : OrExpression                              { $$ = $1; }
 311     | XorExpression tXOR OrExpression           { $$ = new_binary_expression(ctx, EXPR_XOR, $1, $3); CHECK_ERROR; }
 312
 313 OrExpression
 314     : AndExpression                             { $$ = $1; }
 315     | OrExpression tOR AndExpression            { $$ = new_binary_expression(ctx, EXPR_OR, $1, $3); CHECK_ERROR; }
 316
 317 AndExpression
 318     : NotExpression                             { $$ = $1; }
 319     | AndExpression tAND NotExpression          { $$ = new_binary_expression(ctx, EXPR_AND, $1, $3); CHECK_ERROR; }
 320
 321 NotExpression
 322     : EqualityExpression            { $$ = $1; }
 323     | tNOT NotExpression            { $$ = new_unary_expression(ctx, EXPR_NOT, $2); CHECK_ERROR; }
 324
 325 EqualityExpression
 326     : ConcatExpression                          { $$ = $1; }
 327     | EqualityExpression '=' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_EQUAL, $1, $3); CHECK_ERROR; }
 328     | EqualityExpression tNEQ ConcatExpression  { $$ = new_binary_expression(ctx, EXPR_NEQUAL, $1, $3); CHECK_ERROR; }
 329     | EqualityExpression '>' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_GT, $1, $3); CHECK_ERROR; }
 330     | EqualityExpression '<' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_LT, $1, $3); CHECK_ERROR; }
 331     | EqualityExpression tGTEQ ConcatExpression { $$ = new_binary_expression(ctx, EXPR_GTEQ, $1, $3); CHECK_ERROR; }
 332     | EqualityExpression tLTEQ ConcatExpression { $$ = new_binary_expression(ctx, EXPR_LTEQ, $1, $3); CHECK_ERROR; }
 333     | EqualityExpression tIS ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_IS, $1, $3); CHECK_ERROR; }
 334
 335 ConcatExpression
 336     : AdditiveExpression                        { $$ = $1; }
 337     | ConcatExpression '&' AdditiveExpression   { $$ = new_binary_expression(ctx, EXPR_CONCAT, $1, $3); CHECK_ERROR; }
 338
 339 AdditiveExpression
 340     : ModExpression                             { $$ = $1; }
 341     | AdditiveExpression '+' ModExpression      { $$ = new_binary_expression(ctx, EXPR_ADD, $1, $3); CHECK_ERROR; }
 342     | AdditiveExpression '-' ModExpression      { $$ = new_binary_expression(ctx, EXPR_SUB, $1, $3); CHECK_ERROR; }
 343
 344 ModExpression
 345     : IntdivExpression                          { $$ = $1; }
 346     | ModExpression tMOD IntdivExpression       { $$ = new_binary_expression(ctx, EXPR_MOD, $1, $3); CHECK_ERROR; }
 347
 348 IntdivExpression
 349     : MultiplicativeExpression                  { $$ = $1; }
 350     | IntdivExpression '\\' MultiplicativeExpression
 351                                                 { $$ = new_binary_expression(ctx, EXPR_IDIV, $1, $3); CHECK_ERROR; }
 352
 353 MultiplicativeExpression
 354     : ExpExpression                             { $$ = $1; }
 355     | MultiplicativeExpression '*' ExpExpression
 356                                                 { $$ = new_binary_expression(ctx, EXPR_MUL, $1, $3); CHECK_ERROR; }
 357     | MultiplicativeExpression '/' ExpExpression
 358                                                 { $$ = new_binary_expression(ctx, EXPR_DIV, $1, $3); CHECK_ERROR; }
 359
 360 ExpExpression
 361     : UnaryExpression                           { $$ = $1; }
 362     | ExpExpression '^' UnaryExpression         { $$ = new_binary_expression(ctx, EXPR_EXP, $1, $3); CHECK_ERROR; }
 363
 364 UnaryExpression
 365     : LiteralExpression             { $$ = $1; }
 366     | CallExpression                { $$ = $1; }
 367     | tNEW Identifier               { $$ = new_new_expression(ctx, $2); CHECK_ERROR; }
 368     | '-' UnaryExpression           { $$ = new_unary_expression(ctx, EXPR_NEG, $2); CHECK_ERROR; }
 369
 370 CallExpression
 371     : PrimaryExpression                 { $$ = $1; }
 372     | MemberExpression Arguments_opt    { $1->args = $2; $$ = &$1->expr; }
 373
 374 LiteralExpression
 375     : tTRUE                         { $$ = new_bool_expression(ctx, VARIANT_TRUE); CHECK_ERROR; }
 376     | tFALSE                        { $$ = new_bool_expression(ctx, VARIANT_FALSE); CHECK_ERROR; }
 377     | tString                       { $$ = new_string_expression(ctx, $1); CHECK_ERROR; }
 378     | NumericLiteralExpression      { $$ = $1; }
 379     | tEMPTY                        { $$ = new_expression(ctx, EXPR_EMPTY, 0); CHECK_ERROR; }
 380     | tNULL                         { $$ = new_expression(ctx, EXPR_NULL, 0); CHECK_ERROR; }
 381     | tNOTHING                      { $$ = new_expression(ctx, EXPR_NOTHING, 0); CHECK_ERROR; }
 382
 383 NumericLiteralExpression
 384     : tShort                        { $$ = new_long_expression(ctx, EXPR_USHORT, $1); CHECK_ERROR; }
 385     | '0'                           { $$ = new_long_expression(ctx, EXPR_USHORT, 0); CHECK_ERROR; }
 386     | tLong                         { $$ = new_long_expression(ctx, EXPR_ULONG, $1); CHECK_ERROR; }
 387     | tDouble                       { $$ = new_double_expression(ctx, $1); CHECK_ERROR; }
 388
 389 IntegerValue
 390     : tShort                        { $$ = $1; }
 391     | '0'                           { $$ = 0; }
 392     | tLong                         { $$ = $1; }
 393
 394 PrimaryExpression
 395     : '(' Expression ')'            { $$ = new_unary_expression(ctx, EXPR_BRACKETS, $2); }
 396     | tME                           { $$ = new_expression(ctx, EXPR_ME, 0); CHECK_ERROR; }
 397
 398 ClassDeclaration
 399     : tCLASS Identifier tNL ClassBody tEND tCLASS tNL       { $4->name = $2; $$ = $4; }
 400
 401 ClassBody
 402     : /* empty */                               { $$ = new_class_decl(ctx); }
 403     | FunctionDecl tNL ClassBody                { $$ = add_class_function(ctx, $3, $1); CHECK_ERROR; }
 404     /* FIXME: We should use DimDecl here to support arrays, but that conflicts with PropertyDecl. */
 405     | Storage tIdentifier tNL ClassBody         { dim_decl_t *dim_decl = new_dim_decl(ctx, $2, FALSE, NULL); CHECK_ERROR;
 406                                                   $$ = add_dim_prop(ctx, $4, dim_decl, $1); CHECK_ERROR; }
 407     | tDIM DimDecl tNL ClassBody                { $$ = add_dim_prop(ctx, $4, $2, 0); CHECK_ERROR; }
 408     | PropertyDecl tNL ClassBody                { $$ = add_class_function(ctx, $3, $1); CHECK_ERROR; }
 409
 410 PropertyDecl
 411     : Storage_opt tPROPERTY tGET tIdentifier ArgumentsDecl_opt tNL StatementsNl_opt tEND tPROPERTY
 412                                     { $$ = new_function_decl(ctx, $4, FUNC_PROPGET, $1, $5, $7); CHECK_ERROR; }
 413     | Storage_opt tPROPERTY tLET tIdentifier '(' ArgumentDecl ')' tNL StatementsNl_opt tEND tPROPERTY
 414                                     { $$ = new_function_decl(ctx, $4, FUNC_PROPLET, $1, $6, $9); CHECK_ERROR; }
 415     | Storage_opt tPROPERTY tSET tIdentifier '(' ArgumentDecl ')' tNL StatementsNl_opt tEND tPROPERTY
 416                                     { $$ = new_function_decl(ctx, $4, FUNC_PROPSET, $1, $6, $9); CHECK_ERROR; }
 417
 418 FunctionDecl
 419     : Storage_opt tSUB Identifier ArgumentsDecl_opt tNL StatementsNl_opt tEND tSUB
 420                                     { $$ = new_function_decl(ctx, $3, FUNC_SUB, $1, $4, $6); CHECK_ERROR; }
 421     | Storage_opt tFUNCTION Identifier ArgumentsDecl_opt tNL StatementsNl_opt tEND tFUNCTION
 422                                     { $$ = new_function_decl(ctx, $3, FUNC_FUNCTION, $1, $4, $6); CHECK_ERROR; }
 423
 424 Storage_opt
 425     : /* empty*/                    { $$ = 0; }
 426     | Storage                       { $$ = $1; }
 427
 428 Storage
 429     : tPUBLIC tDEFAULT              { $$ = STORAGE_IS_DEFAULT; }
 430     | tPUBLIC                       { $$ = 0; }
 431     | tPRIVATE                      { $$ = STORAGE_IS_PRIVATE; }
 432
 433 ArgumentsDecl_opt
 434     : EmptyBrackets_opt                         { $$ = NULL; }
 435     | '(' ArgumentDeclList ')'                  { $$ = $2; }
 436
 437 ArgumentDeclList
 438     : ArgumentDecl                              { $$ = $1; }
 439     | ArgumentDecl ',' ArgumentDeclList         { $1->next = $3; $$ = $1; }
 440
 441 ArgumentDecl
 442     : Identifier EmptyBrackets_opt              { $$ = new_argument_decl(ctx, $1, TRUE); }
 443     | tBYREF Identifier EmptyBrackets_opt       { $$ = new_argument_decl(ctx, $2, TRUE); }
 444     | tBYVAL Identifier EmptyBrackets_opt       { $$ = new_argument_decl(ctx, $2, FALSE); }
 445
 446 /* 'property' may be both keyword and identifier, depending on context */
 447 Identifier
 448     : tIdentifier    { $$ = $1; }
 449     | tPROPERTY      { $$ = propertyW; }
 450
 451 /* Some statements accept both new line and ':' as a separator */
 452 StSep
 453     : tNL
 454     | ':'
 455
 456 %%
 457
 458 static int parser_error(parser_ctx_t *ctx, const char *str)
 459 {
 460     return 0;
 461 }
 462
 463 static void source_add_statement(parser_ctx_t *ctx, statement_t *stat)
 464 {
 465     if(!stat)
 466         return;
 467
 468     if(ctx->stats) {
 469         ctx->stats_tail->next = stat;
 470         ctx->stats_tail = stat;
 471     }else {
 472         ctx->stats = ctx->stats_tail = stat;
 473     }
 474 }
 475
 476 static void source_add_class(parser_ctx_t *ctx, class_decl_t *class_decl)
 477 {
 478     class_decl->next = ctx->class_decls;
 479     ctx->class_decls = class_decl;
 480 }
 481
 482 static void parse_complete(parser_ctx_t *ctx, BOOL option_explicit)
 483 {
 484     ctx->parse_complete = TRUE;
 485     ctx->option_explicit = option_explicit;
 486 }
 487
 488 static void *new_expression(parser_ctx_t *ctx, expression_type_t type, size_t size)
 489 {
 490     expression_t *expr;
 491
 492     expr = parser_alloc(ctx, size ? size : sizeof(*expr));
 493     if(expr) {
 494         expr->type = type;
 495         expr->next = NULL;
 496     }
 497
 498     return expr;
 499 }
 500
 501 static expression_t *new_bool_expression(parser_ctx_t *ctx, VARIANT_BOOL value)
 502 {
 503     bool_expression_t *expr;
 504
 505     expr = new_expression(ctx, EXPR_BOOL, sizeof(*expr));
 506     if(!expr)
 507         return NULL;
 508
 509     expr->value = value;
 510     return &expr->expr;
 511 }
 512
 513 static expression_t *new_string_expression(parser_ctx_t *ctx, const WCHAR *value)
 514 {
 515     string_expression_t *expr;
 516
 517     expr = new_expression(ctx, EXPR_STRING, sizeof(*expr));
 518     if(!expr)
 519         return NULL;
 520
 521     expr->value = value;
 522     return &expr->expr;
 523 }
 524
 525 static expression_t *new_long_expression(parser_ctx_t *ctx, expression_type_t type, LONG value)
 526 {
 527     int_expression_t *expr;
 528
 529     expr = new_expression(ctx, type, sizeof(*expr));
 530     if(!expr)
 531         return NULL;
 532
 533     expr->value = value;
 534     return &expr->expr;
 535 }
 536
 537 static expression_t *new_double_expression(parser_ctx_t *ctx, double value)
 538 {
 539     double_expression_t *expr;
 540
 541     expr = new_expression(ctx, EXPR_DOUBLE, sizeof(*expr));
 542     if(!expr)
 543         return NULL;
 544
 545     expr->value = value;
 546     return &expr->expr;
 547 }
 548
 549 static expression_t *new_unary_expression(parser_ctx_t *ctx, expression_type_t type, expression_t *subexpr)
 550 {
 551     unary_expression_t *expr;
 552
 553     expr = new_expression(ctx, type, sizeof(*expr));
 554     if(!expr)
 555         return NULL;
 556
 557     expr->subexpr = subexpr;
 558     return &expr->expr;
 559 }
 560
 561 static expression_t *new_binary_expression(parser_ctx_t *ctx, expression_type_t type, expression_t *left, expression_t *right)
 562 {
 563     binary_expression_t *expr;
 564
 565     expr = new_expression(ctx, type, sizeof(*expr));
 566     if(!expr)
 567         return NULL;
 568
 569     expr->left = left;
 570     expr->right = right;
 571     return &expr->expr;
 572 }
 573
 574 static member_expression_t *new_member_expression(parser_ctx_t *ctx, expression_t *obj_expr, const WCHAR *identifier)
 575 {
 576     member_expression_t *expr;
 577
 578     expr = new_expression(ctx, EXPR_MEMBER, sizeof(*expr));
 579     if(!expr)
 580         return NULL;
 581
 582     expr->obj_expr = obj_expr;
 583     expr->identifier = identifier;
 584     expr->args = NULL;
 585     return expr;
 586 }
 587
 588 static expression_t *new_new_expression(parser_ctx_t *ctx, const WCHAR *identifier)
 589 {
 590     string_expression_t *expr;
 591
 592     expr = new_expression(ctx, EXPR_NEW, sizeof(*expr));
 593     if(!expr)
 594         return NULL;
 595
 596     expr->value = identifier;
 597     return &expr->expr;
 598 }
 599
 600 static void *new_statement(parser_ctx_t *ctx, statement_type_t type, size_t size)
 601 {
 602     statement_t *stat;
 603
 604     stat = parser_alloc(ctx, size ? size : sizeof(*stat));
 605     if(stat) {
 606         stat->type = type;
 607         stat->next = NULL;
 608     }
 609
 610     return stat;
 611 }
 612
 613 static statement_t *new_call_statement(parser_ctx_t *ctx, BOOL is_strict, member_expression_t *expr)
 614 {
 615     call_statement_t *stat;
 616
 617     stat = new_statement(ctx, STAT_CALL, sizeof(*stat));
 618     if(!stat)
 619         return NULL;
 620
 621     stat->expr = expr;
 622     stat->is_strict = is_strict;
 623     return &stat->stat;
 624 }
 625
 626 static statement_t *new_assign_statement(parser_ctx_t *ctx, member_expression_t *left, expression_t *right)
 627 {
 628     assign_statement_t *stat;
 629
 630     stat = new_statement(ctx, STAT_ASSIGN, sizeof(*stat));
 631     if(!stat)
 632         return NULL;
 633
 634     stat->member_expr = left;
 635     stat->value_expr = right;
 636     return &stat->stat;
 637 }
 638
 639 static statement_t *new_set_statement(parser_ctx_t *ctx, member_expression_t *left, expression_t *right)
 640 {
 641     assign_statement_t *stat;
 642
 643     stat = new_statement(ctx, STAT_SET, sizeof(*stat));
 644     if(!stat)
 645         return NULL;
 646
 647     stat->member_expr = left;
 648     stat->value_expr = right;
 649     return &stat->stat;
 650 }
 651
 652 static dim_decl_t *new_dim_decl(parser_ctx_t *ctx, const WCHAR *name, BOOL is_array, dim_list_t *dims)
 653 {
 654     dim_decl_t *decl;
 655
 656     decl = parser_alloc(ctx, sizeof(*decl));
 657     if(!decl)
 658         return NULL;
 659
 660     decl->name = name;
 661     decl->is_array = is_array;
 662     decl->dims = dims;
 663     decl->next = NULL;
 664     return decl;
 665 }
 666
 667 static dim_list_t *new_dim(parser_ctx_t *ctx, unsigned val, dim_list_t *next)
 668 {
 669     dim_list_t *ret;
 670
 671     ret = parser_alloc(ctx, sizeof(*ret));
 672     if(!ret)
 673         return NULL;
 674
 675     ret->val = val;
 676     ret->next = next;
 677     return ret;
 678 }
 679
 680 static statement_t *new_dim_statement(parser_ctx_t *ctx, dim_decl_t *decls)
 681 {
 682     dim_statement_t *stat;
 683
 684     stat = new_statement(ctx, STAT_DIM, sizeof(*stat));
 685     if(!stat)
 686         return NULL;
 687
 688     stat->dim_decls = decls;
 689     return &stat->stat;
 690 }
 691
 692 static elseif_decl_t *new_elseif_decl(parser_ctx_t *ctx, expression_t *expr, statement_t *stat)
 693 {
 694     elseif_decl_t *decl;
 695
 696     decl = parser_alloc(ctx, sizeof(*decl));
 697     if(!decl)
 698         return NULL;
 699
 700     decl->expr = expr;
 701     decl->stat = stat;
 702     decl->next = NULL;
 703     return decl;
 704 }
 705
 706 static statement_t *new_while_statement(parser_ctx_t *ctx, statement_type_t type, expression_t *expr, statement_t *body)
 707 {
 708     while_statement_t *stat;
 709
 710     stat = new_statement(ctx, type, sizeof(*stat));
 711     if(!stat)
 712         return NULL;
 713
 714     stat->expr = expr;
 715     stat->body = body;
 716     return &stat->stat;
 717 }
 718
 719 static statement_t *new_forto_statement(parser_ctx_t *ctx, const WCHAR *identifier, expression_t *from_expr,
 720         expression_t *to_expr, expression_t *step_expr, statement_t *body)
 721 {
 722     forto_statement_t *stat;
 723
 724     stat = new_statement(ctx, STAT_FORTO, sizeof(*stat));
 725     if(!stat)
 726         return NULL;
 727
 728     stat->identifier = identifier;
 729     stat->from_expr = from_expr;
 730     stat->to_expr = to_expr;
 731     stat->step_expr = step_expr;
 732     stat->body = body;
 733     return &stat->stat;
 734 }
 735
 736 static statement_t *new_foreach_statement(parser_ctx_t *ctx, const WCHAR *identifier, expression_t *group_expr,
 737         statement_t *body)
 738 {
 739     foreach_statement_t *stat;
 740
 741     stat = new_statement(ctx, STAT_FOREACH, sizeof(*stat));
 742     if(!stat)
 743         return NULL;
 744
 745     stat->identifier = identifier;
 746     stat->group_expr = group_expr;
 747     stat->body = body;
 748     return &stat->stat;
 749 }
 750
 751 static statement_t *new_if_statement(parser_ctx_t *ctx, expression_t *expr, statement_t *if_stat, elseif_decl_t *elseif_decl,
 752         statement_t *else_stat)
 753 {
 754     if_statement_t *stat;
 755
 756     stat = new_statement(ctx, STAT_IF, sizeof(*stat));
 757     if(!stat)
 758         return NULL;
 759
 760     stat->expr = expr;
 761     stat->if_stat = if_stat;
 762     stat->elseifs = elseif_decl;
 763     stat->else_stat = else_stat;
 764     return &stat->stat;
 765 }
 766
 767 static statement_t *new_select_statement(parser_ctx_t *ctx, expression_t *expr, case_clausule_t *case_clausules)
 768 {
 769     select_statement_t *stat;
 770
 771     stat = new_statement(ctx, STAT_SELECT, sizeof(*stat));
 772     if(!stat)
 773         return NULL;
 774
 775     stat->expr = expr;
 776     stat->case_clausules = case_clausules;
 777     return &stat->stat;
 778 }
 779
 780 static case_clausule_t *new_case_clausule(parser_ctx_t *ctx, expression_t *expr, statement_t *stat, case_clausule_t *next)
 781 {
 782     case_clausule_t *ret;
 783
 784     ret = parser_alloc(ctx, sizeof(*ret));
 785     if(!ret)
 786         return NULL;
 787
 788     ret->expr = expr;
 789     ret->stat = stat;
 790     ret->next = next;
 791     return ret;
 792 }
 793
 794 static statement_t *new_onerror_statement(parser_ctx_t *ctx, BOOL resume_next)
 795 {
 796     onerror_statement_t *stat;
 797
 798     stat = new_statement(ctx, STAT_ONERROR, sizeof(*stat));
 799     if(!stat)
 800         return NULL;
 801
 802     stat->resume_next = resume_next;
 803     return &stat->stat;
 804 }
 805
 806 static arg_decl_t *new_argument_decl(parser_ctx_t *ctx, const WCHAR *name, BOOL by_ref)
 807 {
 808     arg_decl_t *arg_decl;
 809
 810     arg_decl = parser_alloc(ctx, sizeof(*arg_decl));
 811     if(!arg_decl)
 812         return NULL;
 813
 814     arg_decl->name = name;
 815     arg_decl->by_ref = by_ref;
 816     arg_decl->next = NULL;
 817     return arg_decl;
 818 }
 819
 820 static function_decl_t *new_function_decl(parser_ctx_t *ctx, const WCHAR *name, function_type_t type,
 821         unsigned storage_flags, arg_decl_t *arg_decl, statement_t *body)
 822 {
 823     function_decl_t *decl;
 824
 825     if(storage_flags & STORAGE_IS_DEFAULT) {
 826         if(type == FUNC_PROPGET) {
 827             type = FUNC_DEFGET;
 828         }else {
 829             FIXME("Invalid default property\n");
 830             ctx->hres = E_FAIL;
 831             return NULL;
 832         }
 833     }
 834
 835     decl = parser_alloc(ctx, sizeof(*decl));
 836     if(!decl)
 837         return NULL;
 838
 839     decl->name = name;
 840     decl->type = type;
 841     decl->is_public = !(storage_flags & STORAGE_IS_PRIVATE);
 842     decl->args = arg_decl;
 843     decl->body = body;
 844     decl->next = NULL;
 845     decl->next_prop_func = NULL;
 846     return decl;
 847 }
 848
 849 static statement_t *new_function_statement(parser_ctx_t *ctx, function_decl_t *decl)
 850 {
 851     function_statement_t *stat;
 852
 853     stat = new_statement(ctx, STAT_FUNC, sizeof(*stat));
 854     if(!stat)
 855         return NULL;
 856
 857     stat->func_decl = decl;
 858     return &stat->stat;
 859 }
 860
 861 static class_decl_t *new_class_decl(parser_ctx_t *ctx)
 862 {
 863     class_decl_t *class_decl;
 864
 865     class_decl = parser_alloc(ctx, sizeof(*class_decl));
 866     if(!class_decl)
 867         return NULL;
 868
 869     class_decl->funcs = NULL;
 870     class_decl->props = NULL;
 871     class_decl->next = NULL;
 872     return class_decl;
 873 }
 874
 875 static class_decl_t *add_class_function(parser_ctx_t *ctx, class_decl_t *class_decl, function_decl_t *decl)
 876 {
 877     function_decl_t *iter;
 878
 879     for(iter = class_decl->funcs; iter; iter = iter->next) {
 880         if(!strcmpiW(iter->name, decl->name)) {
 881             if(decl->type == FUNC_SUB || decl->type == FUNC_FUNCTION) {
 882                 FIXME("Redefinition of %s::%s\n", debugstr_w(class_decl->name), debugstr_w(decl->name));
 883                 ctx->hres = E_FAIL;
 884                 return NULL;
 885             }
 886
 887             while(1) {
 888                 if(iter->type == decl->type) {
 889                     FIXME("Redefinition of %s::%s\n", debugstr_w(class_decl->name), debugstr_w(decl->name));
 890                     ctx->hres = E_FAIL;
 891                     return NULL;
 892                 }
 893                 if(!iter->next_prop_func)
 894                     break;
 895                 iter = iter->next_prop_func;
 896             }
 897
 898             iter->next_prop_func = decl;
 899             return class_decl;
 900         }
 901     }
 902
 903     decl->next = class_decl->funcs;
 904     class_decl->funcs = decl;
 905     return class_decl;
 906 }
 907
 908 static class_decl_t *add_dim_prop(parser_ctx_t *ctx, class_decl_t *class_decl, dim_decl_t *dim_decl, unsigned storage_flags)
 909 {
 910     if(storage_flags & STORAGE_IS_DEFAULT) {
 911         FIXME("variant prop van't be default value\n");
 912         ctx->hres = E_FAIL;
 913         return NULL;
 914     }
 915
 916     dim_decl->is_public = !(storage_flags & STORAGE_IS_PRIVATE);
 917     dim_decl->next = class_decl->props;
 918     class_decl->props = dim_decl;
 919     return class_decl;
 920 }
 921
 922 static const_decl_t *new_const_decl(parser_ctx_t *ctx, const WCHAR *name, expression_t *expr)
 923 {
 924     const_decl_t *decl;
 925
 926     decl = parser_alloc(ctx, sizeof(*decl));
 927     if(!decl)
 928         return NULL;
 929
 930     decl->name = name;
 931     decl->value_expr = expr;
 932     decl->next = NULL;
 933     return decl;
 934 }
 935
 936 static statement_t *new_const_statement(parser_ctx_t *ctx, const_decl_t *decls)
 937 {
 938     const_statement_t *stat;
 939
 940     stat = new_statement(ctx, STAT_CONST, sizeof(*stat));
 941     if(!stat)
 942         return NULL;
 943
 944     stat->decls = decls;
 945     return &stat->stat;
 946 }
 947
 948 static statement_t *link_statements(statement_t *head, statement_t *tail)
 949 {
 950     statement_t *iter;
 951
 952     for(iter = head; iter->next; iter = iter->next);
 953     iter->next = tail;
 954
 955     return head;
 956 }
 957
 958 void *parser_alloc(parser_ctx_t *ctx, size_t size)
 959 {
 960     void *ret;
 961
 962     ret = heap_pool_alloc(&ctx->heap, size);
 963     if(!ret)
 964         ctx->hres = E_OUTOFMEMORY;
 965     return ret;
 966 }
 967
 968 HRESULT parse_script(parser_ctx_t *ctx, const WCHAR *code, const WCHAR *delimiter)
 969 {
 970     const WCHAR html_delimiterW[] = {'<','/','s','c','r','i','p','t','>',0};
 971
 972     ctx->code = ctx->ptr = code;
 973     ctx->end = ctx->code + strlenW(ctx->code);
 974
 975     heap_pool_init(&ctx->heap);
 976
 977     ctx->parse_complete = FALSE;
 978     ctx->hres = S_OK;
 979
 980     ctx->last_token = tNL;
 981     ctx->last_nl = 0;
 982     ctx->stats = ctx->stats_tail = NULL;
 983     ctx->class_decls = NULL;
 984     ctx->option_explicit = FALSE;
 985     ctx->is_html = delimiter && !strcmpiW(delimiter, html_delimiterW);
 986
 987     parser_parse(ctx);
 988
 989     if(FAILED(ctx->hres))
 990         return ctx->hres;
 991     if(!ctx->parse_complete) {
 992         FIXME("parser failed around %s\n", debugstr_w(ctx->code+20 > ctx->ptr ? ctx->code : ctx->ptr-20));
 993         return E_FAIL;
 994     }
 995
 996     return S_OK;
 997 }
 998
 999 void parser_release(parser_ctx_t *ctx)
1000 {
1001     heap_pool_free(&ctx->heap);
1002 }