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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_PARSING_PREPARSER_H | 5 #ifndef V8_PARSING_PREPARSER_H |
6 #define V8_PARSING_PREPARSER_H | 6 #define V8_PARSING_PREPARSER_H |
7 | 7 |
8 #include "src/ast/scopes.h" | 8 #include "src/ast/scopes.h" |
9 #include "src/parsing/parser-base.h" | 9 #include "src/parsing/parser-base.h" |
10 | 10 |
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721 // PreParser doesn't need to store generator variables. | 721 // PreParser doesn't need to store generator variables. |
722 typedef void Variable; | 722 typedef void Variable; |
723 | 723 |
724 // Return types for traversing functions. | 724 // Return types for traversing functions. |
725 typedef PreParserIdentifier Identifier; | 725 typedef PreParserIdentifier Identifier; |
726 typedef PreParserExpression Expression; | 726 typedef PreParserExpression Expression; |
727 typedef PreParserExpression FunctionLiteral; | 727 typedef PreParserExpression FunctionLiteral; |
728 typedef PreParserExpression ObjectLiteralProperty; | 728 typedef PreParserExpression ObjectLiteralProperty; |
729 typedef PreParserExpression ClassLiteralProperty; | 729 typedef PreParserExpression ClassLiteralProperty; |
730 typedef PreParserExpressionList ExpressionList; | 730 typedef PreParserExpressionList ExpressionList; |
731 typedef PreParserExpressionList PropertyList; | 731 typedef PreParserExpressionList ObjectPropertyList; |
| 732 typedef PreParserExpressionList ClassPropertyList; |
732 typedef PreParserFormalParameters FormalParameters; | 733 typedef PreParserFormalParameters FormalParameters; |
733 typedef PreParserStatement Statement; | 734 typedef PreParserStatement Statement; |
734 typedef PreParserStatementList StatementList; | 735 typedef PreParserStatementList StatementList; |
735 typedef PreParserStatement Block; | 736 typedef PreParserStatement Block; |
736 typedef PreParserStatement BreakableStatement; | 737 typedef PreParserStatement BreakableStatement; |
737 typedef PreParserStatement IterationStatement; | 738 typedef PreParserStatement IterationStatement; |
738 | 739 |
739 // For constructing objects returned by the traversing functions. | 740 // For constructing objects returned by the traversing functions. |
740 typedef PreParserFactory Factory; | 741 typedef PreParserFactory Factory; |
741 | 742 |
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830 // These types form an algebra over syntactic categories that is just | 831 // These types form an algebra over syntactic categories that is just |
831 // rich enough to let us recognize and propagate the constructs that | 832 // rich enough to let us recognize and propagate the constructs that |
832 // are either being counted in the preparser data, or is important | 833 // are either being counted in the preparser data, or is important |
833 // to throw the correct syntax error exceptions. | 834 // to throw the correct syntax error exceptions. |
834 | 835 |
835 // All ParseXXX functions take as the last argument an *ok parameter | 836 // All ParseXXX functions take as the last argument an *ok parameter |
836 // which is set to false if parsing failed; it is unchanged otherwise. | 837 // which is set to false if parsing failed; it is unchanged otherwise. |
837 // By making the 'exception handling' explicit, we are forced to check | 838 // By making the 'exception handling' explicit, we are forced to check |
838 // for failure at the call sites. | 839 // for failure at the call sites. |
839 Statement ParseFunctionDeclaration(bool* ok); | 840 Statement ParseFunctionDeclaration(bool* ok); |
840 Statement ParseClassDeclaration(ZoneList<const AstRawString*>* names, | |
841 bool default_export, bool* ok); | |
842 Expression ParseConditionalExpression(bool accept_IN, bool* ok); | 841 Expression ParseConditionalExpression(bool accept_IN, bool* ok); |
843 Expression ParseObjectLiteral(bool* ok); | 842 Expression ParseObjectLiteral(bool* ok); |
844 | 843 |
845 V8_INLINE PreParserStatementList ParseEagerFunctionBody( | 844 V8_INLINE PreParserStatementList ParseEagerFunctionBody( |
846 PreParserIdentifier function_name, int pos, | 845 PreParserIdentifier function_name, int pos, |
847 const PreParserFormalParameters& parameters, FunctionKind kind, | 846 const PreParserFormalParameters& parameters, FunctionKind kind, |
848 FunctionLiteral::FunctionType function_type, bool* ok); | 847 FunctionLiteral::FunctionType function_type, bool* ok); |
849 | 848 |
850 V8_INLINE LazyParsingResult SkipLazyFunctionBody( | 849 V8_INLINE LazyParsingResult SkipLazyFunctionBody( |
851 int* materialized_literal_count, int* expected_property_count, | 850 int* materialized_literal_count, int* expected_property_count, |
852 bool track_unresolved_variables, bool may_abort, bool* ok) { | 851 bool track_unresolved_variables, bool may_abort, bool* ok) { |
853 UNREACHABLE(); | 852 UNREACHABLE(); |
854 return kLazyParsingComplete; | 853 return kLazyParsingComplete; |
855 } | 854 } |
856 Expression ParseFunctionLiteral( | 855 Expression ParseFunctionLiteral( |
857 Identifier name, Scanner::Location function_name_location, | 856 Identifier name, Scanner::Location function_name_location, |
858 FunctionNameValidity function_name_validity, FunctionKind kind, | 857 FunctionNameValidity function_name_validity, FunctionKind kind, |
859 int function_token_pos, FunctionLiteral::FunctionType function_type, | 858 int function_token_pos, FunctionLiteral::FunctionType function_type, |
860 LanguageMode language_mode, bool* ok); | 859 LanguageMode language_mode, bool* ok); |
861 LazyParsingResult ParseLazyFunctionLiteralBody(bool may_abort, bool* ok); | 860 LazyParsingResult ParseLazyFunctionLiteralBody(bool may_abort, bool* ok); |
862 | 861 |
863 PreParserExpression ParseClassLiteral(PreParserIdentifier name, | |
864 Scanner::Location class_name_location, | |
865 bool name_is_strict_reserved, int pos, | |
866 bool* ok); | |
867 | |
868 struct TemplateLiteralState {}; | 862 struct TemplateLiteralState {}; |
869 | 863 |
870 V8_INLINE TemplateLiteralState OpenTemplateLiteral(int pos) { | 864 V8_INLINE TemplateLiteralState OpenTemplateLiteral(int pos) { |
871 return TemplateLiteralState(); | 865 return TemplateLiteralState(); |
872 } | 866 } |
873 V8_INLINE void AddTemplateExpression(TemplateLiteralState* state, | 867 V8_INLINE void AddTemplateExpression(TemplateLiteralState* state, |
874 PreParserExpression expression) {} | 868 PreParserExpression expression) {} |
875 V8_INLINE void AddTemplateSpan(TemplateLiteralState* state, bool tail) {} | 869 V8_INLINE void AddTemplateSpan(TemplateLiteralState* state, bool tail) {} |
876 V8_INLINE PreParserExpression CloseTemplateLiteral( | 870 V8_INLINE PreParserExpression CloseTemplateLiteral( |
877 TemplateLiteralState* state, int start, PreParserExpression tag); | 871 TemplateLiteralState* state, int start, PreParserExpression tag); |
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939 V8_INLINE ZoneList<const AstRawString*>* DeclareLabel( | 933 V8_INLINE ZoneList<const AstRawString*>* DeclareLabel( |
940 ZoneList<const AstRawString*>* labels, PreParserExpression expr, | 934 ZoneList<const AstRawString*>* labels, PreParserExpression expr, |
941 bool* ok) { | 935 bool* ok) { |
942 DCHECK(!expr.AsIdentifier().IsEnum()); | 936 DCHECK(!expr.AsIdentifier().IsEnum()); |
943 DCHECK(!parsing_module_ || !expr.AsIdentifier().IsAwait()); | 937 DCHECK(!parsing_module_ || !expr.AsIdentifier().IsAwait()); |
944 DCHECK(is_sloppy(language_mode()) || | 938 DCHECK(is_sloppy(language_mode()) || |
945 !IsFutureStrictReserved(expr.AsIdentifier())); | 939 !IsFutureStrictReserved(expr.AsIdentifier())); |
946 return labels; | 940 return labels; |
947 } | 941 } |
948 | 942 |
949 V8_INLINE PreParserStatement ParseNativeDeclaration(bool* ok) { | |
950 UNREACHABLE(); | |
951 return PreParserStatement::Default(); | |
952 } | |
953 | |
954 // TODO(nikolaos): The preparser currently does not keep track of labels. | 943 // TODO(nikolaos): The preparser currently does not keep track of labels. |
955 V8_INLINE bool ContainsLabel(ZoneList<const AstRawString*>* labels, | 944 V8_INLINE bool ContainsLabel(ZoneList<const AstRawString*>* labels, |
956 PreParserIdentifier label) { | 945 PreParserIdentifier label) { |
957 return false; | 946 return false; |
958 } | 947 } |
959 | 948 |
960 V8_INLINE PreParserExpression RewriteReturn(PreParserExpression return_value, | 949 V8_INLINE PreParserExpression RewriteReturn(PreParserExpression return_value, |
961 int pos) { | 950 int pos) { |
962 return return_value; | 951 return return_value; |
963 } | 952 } |
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990 return PreParserStatement::Default(); | 979 return PreParserStatement::Default(); |
991 } | 980 } |
992 | 981 |
993 V8_INLINE PreParserStatement DeclareFunction( | 982 V8_INLINE PreParserStatement DeclareFunction( |
994 PreParserIdentifier variable_name, PreParserExpression function, int pos, | 983 PreParserIdentifier variable_name, PreParserExpression function, int pos, |
995 bool is_generator, bool is_async, ZoneList<const AstRawString*>* names, | 984 bool is_generator, bool is_async, ZoneList<const AstRawString*>* names, |
996 bool* ok) { | 985 bool* ok) { |
997 return Statement::Default(); | 986 return Statement::Default(); |
998 } | 987 } |
999 | 988 |
| 989 V8_INLINE PreParserStatement |
| 990 DeclareClass(PreParserIdentifier variable_name, PreParserExpression value, |
| 991 ZoneList<const AstRawString*>* names, int class_token_pos, |
| 992 int end_pos, bool* ok) { |
| 993 return PreParserStatement::Default(); |
| 994 } |
| 995 V8_INLINE void DeclareClassVariable(PreParserIdentifier name, |
| 996 Scope* block_scope, ClassInfo* class_info, |
| 997 int class_token_pos, bool* ok) {} |
| 998 V8_INLINE void DeclareClassProperty(PreParserIdentifier class_name, |
| 999 PreParserExpression property, |
| 1000 ClassInfo* class_info, bool* ok) {} |
| 1001 V8_INLINE PreParserExpression RewriteClassLiteral(PreParserIdentifier name, |
| 1002 ClassInfo* class_info, |
| 1003 int pos, bool* ok) { |
| 1004 return PreParserExpression::Default(); |
| 1005 } |
| 1006 |
| 1007 V8_INLINE PreParserStatement DeclareNative(PreParserIdentifier name, int pos, |
| 1008 bool* ok) { |
| 1009 return PreParserStatement::Default(); |
| 1010 } |
| 1011 |
1000 V8_INLINE void QueueDestructuringAssignmentForRewriting( | 1012 V8_INLINE void QueueDestructuringAssignmentForRewriting( |
1001 PreParserExpression assignment) {} | 1013 PreParserExpression assignment) {} |
1002 V8_INLINE void QueueNonPatternForRewriting(PreParserExpression expr, | 1014 V8_INLINE void QueueNonPatternForRewriting(PreParserExpression expr, |
1003 bool* ok) {} | 1015 bool* ok) {} |
1004 | 1016 |
1005 // Helper functions for recursive descent. | 1017 // Helper functions for recursive descent. |
1006 V8_INLINE bool IsEval(PreParserIdentifier identifier) const { | 1018 V8_INLINE bool IsEval(PreParserIdentifier identifier) const { |
1007 return identifier.IsEval(); | 1019 return identifier.IsEval(); |
1008 } | 1020 } |
1009 | 1021 |
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1096 V8_INLINE static void GetDefaultStrings( | 1108 V8_INLINE static void GetDefaultStrings( |
1097 PreParserIdentifier* default_string, | 1109 PreParserIdentifier* default_string, |
1098 PreParserIdentifier* star_default_star_string) {} | 1110 PreParserIdentifier* star_default_star_string) {} |
1099 | 1111 |
1100 // Functions for encapsulating the differences between parsing and preparsing; | 1112 // Functions for encapsulating the differences between parsing and preparsing; |
1101 // operations interleaved with the recursive descent. | 1113 // operations interleaved with the recursive descent. |
1102 V8_INLINE static void PushLiteralName(PreParserIdentifier id) {} | 1114 V8_INLINE static void PushLiteralName(PreParserIdentifier id) {} |
1103 V8_INLINE static void PushVariableName(PreParserIdentifier id) {} | 1115 V8_INLINE static void PushVariableName(PreParserIdentifier id) {} |
1104 V8_INLINE void PushPropertyName(PreParserExpression expression) {} | 1116 V8_INLINE void PushPropertyName(PreParserExpression expression) {} |
1105 V8_INLINE void PushEnclosingName(PreParserIdentifier name) {} | 1117 V8_INLINE void PushEnclosingName(PreParserIdentifier name) {} |
1106 V8_INLINE static void InferFunctionName(PreParserExpression expression) {} | 1118 V8_INLINE static void AddFunctionForNameInference( |
| 1119 PreParserExpression expression) {} |
| 1120 V8_INLINE static void InferFunctionName() {} |
1107 | 1121 |
1108 V8_INLINE static void CheckAssigningFunctionLiteralToProperty( | 1122 V8_INLINE static void CheckAssigningFunctionLiteralToProperty( |
1109 PreParserExpression left, PreParserExpression right) {} | 1123 PreParserExpression left, PreParserExpression right) {} |
1110 | 1124 |
1111 V8_INLINE static PreParserExpression MarkExpressionAsAssigned( | 1125 V8_INLINE static PreParserExpression MarkExpressionAsAssigned( |
1112 PreParserExpression expression) { | 1126 PreParserExpression expression) { |
1113 // TODO(marja): To be able to produce the same errors, the preparser needs | 1127 // TODO(marja): To be able to produce the same errors, the preparser needs |
1114 // to start tracking which expressions are variables and which are assigned. | 1128 // to start tracking which expressions are variables and which are assigned. |
1115 return expression; | 1129 return expression; |
1116 } | 1130 } |
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1311 if (scanner()->UnescapedLiteralMatches("use strict", 10)) { | 1325 if (scanner()->UnescapedLiteralMatches("use strict", 10)) { |
1312 return PreParserExpression::UseStrictStringLiteral(); | 1326 return PreParserExpression::UseStrictStringLiteral(); |
1313 } | 1327 } |
1314 return PreParserExpression::StringLiteral(); | 1328 return PreParserExpression::StringLiteral(); |
1315 } | 1329 } |
1316 | 1330 |
1317 V8_INLINE PreParserExpressionList NewExpressionList(int size) const { | 1331 V8_INLINE PreParserExpressionList NewExpressionList(int size) const { |
1318 return PreParserExpressionList(); | 1332 return PreParserExpressionList(); |
1319 } | 1333 } |
1320 | 1334 |
1321 V8_INLINE PreParserExpressionList NewPropertyList(int size) const { | 1335 V8_INLINE PreParserExpressionList NewObjectPropertyList(int size) const { |
1322 return PreParserExpressionList(); | 1336 return PreParserExpressionList(); |
1323 } | 1337 } |
1324 | 1338 |
| 1339 V8_INLINE PreParserExpressionList NewClassPropertyList(int size) const { |
| 1340 return PreParserExpressionList(); |
| 1341 } |
| 1342 |
1325 V8_INLINE PreParserStatementList NewStatementList(int size) const { | 1343 V8_INLINE PreParserStatementList NewStatementList(int size) const { |
1326 return PreParserStatementList(); | 1344 return PreParserStatementList(); |
1327 } | 1345 } |
1328 | 1346 |
1329 PreParserStatementList NewCaseClauseList(int size) { | 1347 PreParserStatementList NewCaseClauseList(int size) { |
1330 return PreParserStatementList(); | 1348 return PreParserStatementList(); |
1331 } | 1349 } |
1332 | 1350 |
1333 V8_INLINE PreParserExpression | 1351 V8_INLINE PreParserExpression |
1334 NewV8Intrinsic(PreParserIdentifier name, PreParserExpressionList arguments, | 1352 NewV8Intrinsic(PreParserIdentifier name, PreParserExpressionList arguments, |
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1457 function_state_->NextMaterializedLiteralIndex(); | 1475 function_state_->NextMaterializedLiteralIndex(); |
1458 function_state_->NextMaterializedLiteralIndex(); | 1476 function_state_->NextMaterializedLiteralIndex(); |
1459 } | 1477 } |
1460 return EmptyExpression(); | 1478 return EmptyExpression(); |
1461 } | 1479 } |
1462 | 1480 |
1463 } // namespace internal | 1481 } // namespace internal |
1464 } // namespace v8 | 1482 } // namespace v8 |
1465 | 1483 |
1466 #endif // V8_PARSING_PREPARSER_H | 1484 #endif // V8_PARSING_PREPARSER_H |
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