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- /*
- * Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #pragma once
- #include "Token.h"
- #include <AK/HashMap.h>
- #include <AK/String.h>
- #include <AK/StringView.h>
- namespace SQL {
- class Lexer {
- public:
- explicit Lexer(StringView source);
- Token next();
- private:
- void consume();
- bool consume_whitespace_and_comments();
- bool consume_numeric_literal();
- bool consume_string_literal();
- bool consume_blob_literal();
- bool consume_exponent();
- bool consume_hexadecimal_number();
- bool match(char a, char b) const;
- bool is_identifier_start() const;
- bool is_identifier_middle() const;
- bool is_numeric_literal_start() const;
- bool is_string_literal_start() const;
- bool is_string_literal_end() const;
- bool is_blob_literal_start() const;
- bool is_line_comment_start() const;
- bool is_block_comment_start() const;
- bool is_block_comment_end() const;
- bool is_line_break() const;
- bool is_eof() const;
- static HashMap<String, TokenType> s_keywords;
- static HashMap<char, TokenType> s_one_char_tokens;
- static HashMap<String, TokenType> s_two_char_tokens;
- StringView m_source;
- size_t m_line_number { 1 };
- size_t m_line_column { 0 };
- char m_current_char { 0 };
- size_t m_position { 0 };
- };
- }
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