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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_PARSER_BASE_H | 5 #ifndef V8_PARSING_PARSER_BASE_H |
6 #define V8_PARSING_PARSER_BASE_H | 6 #define V8_PARSING_PARSER_BASE_H |
7 | 7 |
8 #include "src/ast/ast.h" | 8 #include "src/ast/ast.h" |
9 #include "src/ast/scopes.h" | 9 #include "src/ast/scopes.h" |
10 #include "src/bailout-reason.h" | 10 #include "src/bailout-reason.h" |
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4943 int pos = peek_position(); | 4943 int pos = peek_position(); |
4944 | 4944 |
4945 switch (peek()) { | 4945 switch (peek()) { |
4946 case Token::FUNCTION: | 4946 case Token::FUNCTION: |
4947 case Token::LBRACE: | 4947 case Token::LBRACE: |
4948 UNREACHABLE(); // Always handled by the callers. | 4948 UNREACHABLE(); // Always handled by the callers. |
4949 case Token::CLASS: | 4949 case Token::CLASS: |
4950 ReportUnexpectedToken(Next()); | 4950 ReportUnexpectedToken(Next()); |
4951 *ok = false; | 4951 *ok = false; |
4952 return impl()->NullStatement(); | 4952 return impl()->NullStatement(); |
4953 case Token::LET: | 4953 case Token::LET: { |
4954 if (PeekAhead() != Token::LBRACK) break; | 4954 Token::Value next_next = PeekAhead(); |
| 4955 // "let" followed by either "[", "{" or an identifier means a lexical |
| 4956 // declaration, which should not appear here. |
| 4957 if (next_next != Token::LBRACK && next_next != Token::LBRACE && |
| 4958 next_next != Token::IDENTIFIER) { |
| 4959 break; |
| 4960 } |
4955 impl()->ReportMessageAt(scanner()->peek_location(), | 4961 impl()->ReportMessageAt(scanner()->peek_location(), |
4956 MessageTemplate::kUnexpectedLexicalDeclaration); | 4962 MessageTemplate::kUnexpectedLexicalDeclaration); |
4957 *ok = false; | 4963 *ok = false; |
4958 return impl()->NullStatement(); | 4964 return impl()->NullStatement(); |
| 4965 } |
4959 default: | 4966 default: |
4960 break; | 4967 break; |
4961 } | 4968 } |
4962 | 4969 |
4963 bool starts_with_identifier = peek_any_identifier(); | 4970 bool starts_with_identifier = peek_any_identifier(); |
4964 ExpressionT expr = ParseExpression(true, CHECK_OK); | 4971 ExpressionT expr = ParseExpression(true, CHECK_OK); |
4965 if (peek() == Token::COLON && starts_with_identifier && | 4972 if (peek() == Token::COLON && starts_with_identifier && |
4966 impl()->IsIdentifier(expr)) { | 4973 impl()->IsIdentifier(expr)) { |
4967 // The whole expression was a single identifier, and not, e.g., | 4974 // The whole expression was a single identifier, and not, e.g., |
4968 // something starting with an identifier or a parenthesized identifier. | 4975 // something starting with an identifier or a parenthesized identifier. |
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5865 } | 5872 } |
5866 | 5873 |
5867 #undef CHECK_OK | 5874 #undef CHECK_OK |
5868 #undef CHECK_OK_CUSTOM | 5875 #undef CHECK_OK_CUSTOM |
5869 #undef CHECK_OK_VOID | 5876 #undef CHECK_OK_VOID |
5870 | 5877 |
5871 } // namespace internal | 5878 } // namespace internal |
5872 } // namespace v8 | 5879 } // namespace v8 |
5873 | 5880 |
5874 #endif // V8_PARSING_PARSER_BASE_H | 5881 #endif // V8_PARSING_PARSER_BASE_H |
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