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6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/*
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* Copyright (c) 2021, Tim Flynn <trflynn89@serenityos.org>
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* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Token.h"
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#include <AK/DeprecatedString.h>
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#include <AK/HashMap.h>
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#include <AK/StringView.h>
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namespace SQL::AST {
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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(StringBuilder* = nullptr);
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bool consume_whitespace_and_comments();
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bool consume_numeric_literal(StringBuilder&);
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bool consume_string_literal(StringBuilder&);
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bool consume_quoted_identifier(StringBuilder&);
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bool consume_blob_literal(StringBuilder&);
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bool consume_exponent(StringBuilder&);
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bool consume_hexadecimal_number(StringBuilder&);
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bool match(char a, char b) 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_numeric_literal_start() const;
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bool is_string_literal_start() const;
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bool is_string_literal_end() const;
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bool is_quoted_identifier_start() const;
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bool is_quoted_identifier_end() const;
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bool is_blob_literal_start() const;
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bool is_line_comment_start() 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_line_break() const;
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bool is_eof() const;
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static HashMap<DeprecatedString, TokenType> s_keywords;
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static HashMap<char, TokenType> s_one_char_tokens;
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static HashMap<DeprecatedString, TokenType> s_two_char_tokens;
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StringView m_source;
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size_t m_line_number { 1 };
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size_t m_line_column { 0 };
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char m_current_char { 0 };
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bool m_eof { false };
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size_t m_position { 0 };
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};
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}
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