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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_PREPARSER_H | 5 #ifndef V8_PREPARSER_H |
6 #define V8_PREPARSER_H | 6 #define V8_PREPARSER_H |
7 | 7 |
8 #include "src/v8.h" | 8 #include "src/v8.h" |
9 | 9 |
10 #include "src/bailout-reason.h" | 10 #include "src/bailout-reason.h" |
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1557 // success (even if parsing failed, the pre-parse data successfully | 1557 // success (even if parsing failed, the pre-parse data successfully |
1558 // captured the syntax error), and false if a stack-overflow happened | 1558 // captured the syntax error), and false if a stack-overflow happened |
1559 // during parsing. | 1559 // during parsing. |
1560 PreParseResult PreParseProgram(int* materialized_literals = 0) { | 1560 PreParseResult PreParseProgram(int* materialized_literals = 0) { |
1561 PreParserScope scope(scope_, SCRIPT_SCOPE); | 1561 PreParserScope scope(scope_, SCRIPT_SCOPE); |
1562 PreParserFactory factory(NULL); | 1562 PreParserFactory factory(NULL); |
1563 FunctionState top_scope(&function_state_, &scope_, &scope, kNormalFunction, | 1563 FunctionState top_scope(&function_state_, &scope_, &scope, kNormalFunction, |
1564 &factory); | 1564 &factory); |
1565 bool ok = true; | 1565 bool ok = true; |
1566 int start_position = scanner()->peek_location().beg_pos; | 1566 int start_position = scanner()->peek_location().beg_pos; |
1567 ParseSourceElements(Token::EOS, &ok); | 1567 ParseStatementList(Token::EOS, &ok); |
1568 if (stack_overflow()) return kPreParseStackOverflow; | 1568 if (stack_overflow()) return kPreParseStackOverflow; |
1569 if (!ok) { | 1569 if (!ok) { |
1570 ReportUnexpectedToken(scanner()->current_token()); | 1570 ReportUnexpectedToken(scanner()->current_token()); |
1571 } else if (is_strict(scope_->language_mode())) { | 1571 } else if (is_strict(scope_->language_mode())) { |
1572 CheckStrictOctalLiteral(start_position, scanner()->location().end_pos, | 1572 CheckStrictOctalLiteral(start_position, scanner()->location().end_pos, |
1573 &ok); | 1573 &ok); |
1574 } | 1574 } |
1575 if (materialized_literals) { | 1575 if (materialized_literals) { |
1576 *materialized_literals = function_state_->materialized_literal_count(); | 1576 *materialized_literals = function_state_->materialized_literal_count(); |
1577 } | 1577 } |
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1602 kStatement, | 1602 kStatement, |
1603 kForStatement | 1603 kForStatement |
1604 }; | 1604 }; |
1605 | 1605 |
1606 // If a list of variable declarations includes any initializers. | 1606 // If a list of variable declarations includes any initializers. |
1607 enum VariableDeclarationProperties { | 1607 enum VariableDeclarationProperties { |
1608 kHasInitializers, | 1608 kHasInitializers, |
1609 kHasNoInitializers | 1609 kHasNoInitializers |
1610 }; | 1610 }; |
1611 | 1611 |
1612 | |
1613 enum SourceElements { | |
1614 kUnknownSourceElements | |
1615 }; | |
1616 | |
1617 // All ParseXXX functions take as the last argument an *ok parameter | 1612 // All ParseXXX functions take as the last argument an *ok parameter |
1618 // which is set to false if parsing failed; it is unchanged otherwise. | 1613 // which is set to false if parsing failed; it is unchanged otherwise. |
1619 // By making the 'exception handling' explicit, we are forced to check | 1614 // By making the 'exception handling' explicit, we are forced to check |
1620 // for failure at the call sites. | 1615 // for failure at the call sites. |
1621 Statement ParseSourceElement(bool* ok); | 1616 Statement ParseStatementListItem(bool* ok); |
1622 SourceElements ParseSourceElements(int end_token, bool* ok); | 1617 void ParseStatementList(int end_token, bool* ok); |
1623 Statement ParseStatement(bool* ok); | 1618 Statement ParseStatement(bool* ok); |
1624 Statement ParseFunctionDeclaration(bool* ok); | 1619 Statement ParseFunctionDeclaration(bool* ok); |
1625 Statement ParseClassDeclaration(bool* ok); | 1620 Statement ParseClassDeclaration(bool* ok); |
1626 Statement ParseBlock(bool* ok); | 1621 Statement ParseBlock(bool* ok); |
1627 Statement ParseVariableStatement(VariableDeclarationContext var_context, | 1622 Statement ParseVariableStatement(VariableDeclarationContext var_context, |
1628 bool* ok); | 1623 bool* ok); |
1629 Statement ParseVariableDeclarations(VariableDeclarationContext var_context, | 1624 Statement ParseVariableDeclarations(VariableDeclarationContext var_context, |
1630 VariableDeclarationProperties* decl_props, | 1625 VariableDeclarationProperties* decl_props, |
1631 int* num_decl, | 1626 int* num_decl, |
1632 bool* ok); | 1627 bool* ok); |
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1675 pre_parser_->function_state_->NextMaterializedLiteralIndex(); | 1670 pre_parser_->function_state_->NextMaterializedLiteralIndex(); |
1676 pre_parser_->function_state_->NextMaterializedLiteralIndex(); | 1671 pre_parser_->function_state_->NextMaterializedLiteralIndex(); |
1677 } | 1672 } |
1678 | 1673 |
1679 | 1674 |
1680 PreParserStatementList PreParser::ParseEagerFunctionBody( | 1675 PreParserStatementList PreParser::ParseEagerFunctionBody( |
1681 PreParserIdentifier function_name, int pos, Variable* fvar, | 1676 PreParserIdentifier function_name, int pos, Variable* fvar, |
1682 Token::Value fvar_init_op, FunctionKind kind, bool* ok) { | 1677 Token::Value fvar_init_op, FunctionKind kind, bool* ok) { |
1683 ParsingModeScope parsing_mode(this, PARSE_EAGERLY); | 1678 ParsingModeScope parsing_mode(this, PARSE_EAGERLY); |
1684 | 1679 |
1685 ParseSourceElements(Token::RBRACE, ok); | 1680 ParseStatementList(Token::RBRACE, ok); |
1686 if (!*ok) return PreParserStatementList(); | 1681 if (!*ok) return PreParserStatementList(); |
1687 | 1682 |
1688 Expect(Token::RBRACE, ok); | 1683 Expect(Token::RBRACE, ok); |
1689 return PreParserStatementList(); | 1684 return PreParserStatementList(); |
1690 } | 1685 } |
1691 | 1686 |
1692 | 1687 |
1693 PreParserStatementList PreParserTraits::ParseEagerFunctionBody( | 1688 PreParserStatementList PreParserTraits::ParseEagerFunctionBody( |
1694 PreParserIdentifier function_name, int pos, Variable* fvar, | 1689 PreParserIdentifier function_name, int pos, Variable* fvar, |
1695 Token::Value fvar_init_op, FunctionKind kind, bool* ok) { | 1690 Token::Value fvar_init_op, FunctionKind kind, bool* ok) { |
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3109 *ok = false; | 3104 *ok = false; |
3110 return; | 3105 return; |
3111 } | 3106 } |
3112 has_seen_constructor_ = true; | 3107 has_seen_constructor_ = true; |
3113 return; | 3108 return; |
3114 } | 3109 } |
3115 } | 3110 } |
3116 } } // v8::internal | 3111 } } // v8::internal |
3117 | 3112 |
3118 #endif // V8_PREPARSER_H | 3113 #endif // V8_PREPARSER_H |
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