/* * Copyright (c) 2021, Tim Flynn <trflynn89@serenityos.org> * Copyright (c) 2021, Jan de Visser <jan@de-visser.net> * * SPDX-License-Identifier: BSD-2-Clause */ #pragma once #include "Token.h" #include <AK/DeprecatedString.h> #include <AK/HashMap.h> #include <AK/StringView.h> namespace SQL::AST { class Lexer { public: explicit Lexer(StringView source); Token next(); private: void consume(StringBuilder* = nullptr); bool consume_whitespace_and_comments(); bool consume_numeric_literal(StringBuilder&); bool consume_string_literal(StringBuilder&); bool consume_quoted_identifier(StringBuilder&); bool consume_blob_literal(StringBuilder&); bool consume_exponent(StringBuilder&); bool consume_hexadecimal_number(StringBuilder&); 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_quoted_identifier_start() const; bool is_quoted_identifier_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<DeprecatedString, TokenType> s_keywords; static HashMap<char, TokenType> s_one_char_tokens; static HashMap<DeprecatedString, 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 }; bool m_eof { false }; size_t m_position { 0 }; }; }