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69845ae460
B.1.3 HTML-like Comments
The syntax and semantics of 11.4 is extended as follows except that this
extension is not allowed when parsing source code using the goal symbol
Module:
Syntax (only relevant part included)
SingleLineHTMLCloseComment ::
LineTerminatorSequence HTMLCloseComment
HTMLCloseComment ::
WhiteSpaceSequence[opt] SingleLineDelimitedCommentSequence[opt] --> SingleLineCommentChars[opt]
Fixes #3810.
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "Token.h"
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#include <AK/HashMap.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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namespace JS {
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class Lexer {
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public:
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explicit Lexer(StringView source);
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Token next();
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private:
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void consume();
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bool consume_exponent();
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bool consume_octal_number();
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bool consume_hexadecimal_number();
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bool consume_binary_number();
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bool is_eof() const;
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bool is_line_terminator() const;
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bool is_identifier_start() const;
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bool is_identifier_middle() const;
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bool is_line_comment_start(bool line_has_token_yet) const;
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bool is_block_comment_start() const;
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bool is_block_comment_end() const;
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bool is_numeric_literal_start() const;
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bool match(char, char) const;
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bool match(char, char, char) const;
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bool match(char, char, char, char) const;
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bool slash_means_division() const;
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StringView m_source;
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size_t m_position { 0 };
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Token m_current_token;
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char m_current_char { 0 };
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size_t m_line_number { 1 };
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size_t m_line_column { 0 };
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bool m_regex_is_in_character_class { false };
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struct TemplateState {
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bool in_expr;
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u8 open_bracket_count;
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};
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Vector<TemplateState> m_template_states;
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static HashMap<String, TokenType> s_keywords;
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static HashMap<String, TokenType> s_three_char_tokens;
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static HashMap<String, TokenType> s_two_char_tokens;
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static HashMap<char, TokenType> s_single_char_tokens;
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};
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}
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