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