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