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