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Side by Side Diff: src/parsing/preparser.h

Issue 2479213002: [parser] Only track parsing-mode (and possibly switch to the preparser) in the parser (Closed)
Patch Set: Created 4 years, 1 month ago
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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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904 // All ParseXXX functions take as the last argument an *ok parameter 904 // All ParseXXX functions take as the last argument an *ok parameter
905 // which is set to false if parsing failed; it is unchanged otherwise. 905 // which is set to false if parsing failed; it is unchanged otherwise.
906 // By making the 'exception handling' explicit, we are forced to check 906 // By making the 'exception handling' explicit, we are forced to check
907 // for failure at the call sites. 907 // for failure at the call sites.
908 908
909 V8_INLINE PreParserStatementList ParseEagerFunctionBody( 909 V8_INLINE PreParserStatementList ParseEagerFunctionBody(
910 PreParserIdentifier function_name, int pos, 910 PreParserIdentifier function_name, int pos,
911 const PreParserFormalParameters& parameters, FunctionKind kind, 911 const PreParserFormalParameters& parameters, FunctionKind kind,
912 FunctionLiteral::FunctionType function_type, bool* ok); 912 FunctionLiteral::FunctionType function_type, bool* ok);
913 913
914 // Indicates that we won't switch from the preparser to the preparser; we'll
915 // just stay where we are.
914 bool AllowsLazyParsingWithoutUnresolvedVariables() const { return false; } 916 bool AllowsLazyParsingWithoutUnresolvedVariables() const { return false; }
915 917
918 // Indicates that we won't switch from the preparser to the preparser; we'll
vogelheim 2016/11/07 14:56:17 Since this just duplicates the comments (because b
919 // just stay where we are.
920 Mode mode() { return PARSE_EAGERLY; }
921
916 V8_INLINE LazyParsingResult SkipFunction( 922 V8_INLINE LazyParsingResult SkipFunction(
917 FunctionKind kind, DeclarationScope* function_scope, int* num_parameters, 923 FunctionKind kind, DeclarationScope* function_scope, int* num_parameters,
918 int* function_length, bool* has_duplicate_parameters, 924 int* function_length, bool* has_duplicate_parameters,
919 int* materialized_literal_count, int* expected_property_count, 925 int* materialized_literal_count, int* expected_property_count,
920 bool is_inner_function, bool may_abort, bool* ok) { 926 bool is_inner_function, bool may_abort, bool* ok) {
921 UNREACHABLE(); 927 UNREACHABLE();
922 return kLazyParsingComplete; 928 return kLazyParsingComplete;
923 } 929 }
924 Expression ParseFunctionLiteral( 930 Expression ParseFunctionLiteral(
925 Identifier name, Scanner::Location function_name_location, 931 Identifier name, Scanner::Location function_name_location,
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1516 PreParserExpression PreParser::SpreadCallNew(PreParserExpression function, 1522 PreParserExpression PreParser::SpreadCallNew(PreParserExpression function,
1517 PreParserExpressionList args, 1523 PreParserExpressionList args,
1518 int pos) { 1524 int pos) {
1519 return factory()->NewCallNew(function, args, pos); 1525 return factory()->NewCallNew(function, args, pos);
1520 } 1526 }
1521 1527
1522 PreParserStatementList PreParser::ParseEagerFunctionBody( 1528 PreParserStatementList PreParser::ParseEagerFunctionBody(
1523 PreParserIdentifier function_name, int pos, 1529 PreParserIdentifier function_name, int pos,
1524 const PreParserFormalParameters& parameters, FunctionKind kind, 1530 const PreParserFormalParameters& parameters, FunctionKind kind,
1525 FunctionLiteral::FunctionType function_type, bool* ok) { 1531 FunctionLiteral::FunctionType function_type, bool* ok) {
1526 ParsingModeScope parsing_mode(this, PARSE_EAGERLY);
1527 PreParserStatementList result; 1532 PreParserStatementList result;
1528 1533
1529 Scope* inner_scope = scope(); 1534 Scope* inner_scope = scope();
1530 if (!parameters.is_simple) inner_scope = NewScope(BLOCK_SCOPE); 1535 if (!parameters.is_simple) inner_scope = NewScope(BLOCK_SCOPE);
1531 1536
1532 { 1537 {
1533 BlockState block_state(&scope_state_, inner_scope); 1538 BlockState block_state(&scope_state_, inner_scope);
1534 ParseStatementList(result, Token::RBRACE, ok); 1539 ParseStatementList(result, Token::RBRACE, ok);
1535 if (!*ok) return PreParserStatementList(); 1540 if (!*ok) return PreParserStatementList();
1536 } 1541 }
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1548 function_state_->NextMaterializedLiteralIndex(); 1553 function_state_->NextMaterializedLiteralIndex();
1549 function_state_->NextMaterializedLiteralIndex(); 1554 function_state_->NextMaterializedLiteralIndex();
1550 } 1555 }
1551 return EmptyExpression(); 1556 return EmptyExpression();
1552 } 1557 }
1553 1558
1554 } // namespace internal 1559 } // namespace internal
1555 } // namespace v8 1560 } // namespace v8
1556 1561
1557 #endif // V8_PARSING_PREPARSER_H 1562 #endif // V8_PARSING_PREPARSER_H
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