mirror of
https://github.com/RGBCube/serenity
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bf53d7ff64
Moved the C++ Lexer we have from LibGUI to here, so that other components could use it without linking with LibGUI.
146 lines
4.6 KiB
C++
146 lines
4.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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 <AK/StringView.h>
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#include <AK/Vector.h>
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namespace Cpp {
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#define FOR_EACH_TOKEN_TYPE \
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__TOKEN(Unknown) \
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__TOKEN(Whitespace) \
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__TOKEN(PreprocessorStatement) \
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__TOKEN(IncludeStatement) \
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__TOKEN(IncludePath) \
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__TOKEN(LeftParen) \
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__TOKEN(RightParen) \
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__TOKEN(LeftCurly) \
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__TOKEN(RightCurly) \
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__TOKEN(LeftBracket) \
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__TOKEN(RightBracket) \
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__TOKEN(Less) \
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__TOKEN(Greater) \
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__TOKEN(LessEquals) \
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__TOKEN(GreaterEquals) \
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__TOKEN(LessLess) \
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__TOKEN(GreaterGreater) \
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__TOKEN(LessLessEquals) \
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__TOKEN(GreaterGreaterEquals) \
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__TOKEN(LessGreater) \
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__TOKEN(Comma) \
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__TOKEN(Plus) \
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__TOKEN(PlusPlus) \
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__TOKEN(PlusEquals) \
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__TOKEN(Minus) \
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__TOKEN(MinusMinus) \
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__TOKEN(MinusEquals) \
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__TOKEN(Asterisk) \
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__TOKEN(AsteriskEquals) \
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__TOKEN(Slash) \
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__TOKEN(SlashEquals) \
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__TOKEN(Percent) \
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__TOKEN(PercentEquals) \
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__TOKEN(Caret) \
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__TOKEN(CaretEquals) \
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__TOKEN(ExclamationMark) \
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__TOKEN(ExclamationMarkEquals) \
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__TOKEN(Equals) \
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__TOKEN(EqualsEquals) \
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__TOKEN(And) \
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__TOKEN(AndAnd) \
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__TOKEN(AndEquals) \
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__TOKEN(Pipe) \
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__TOKEN(PipePipe) \
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__TOKEN(PipeEquals) \
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__TOKEN(Tilde) \
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__TOKEN(QuestionMark) \
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__TOKEN(Colon) \
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__TOKEN(ColonColon) \
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__TOKEN(ColonColonAsterisk) \
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__TOKEN(Semicolon) \
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__TOKEN(Dot) \
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__TOKEN(DotAsterisk) \
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__TOKEN(Arrow) \
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__TOKEN(ArrowAsterisk) \
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__TOKEN(DoubleQuotedString) \
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__TOKEN(SingleQuotedString) \
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__TOKEN(RawString) \
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__TOKEN(EscapeSequence) \
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__TOKEN(Comment) \
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__TOKEN(Integer) \
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__TOKEN(Float) \
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__TOKEN(Keyword) \
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__TOKEN(KnownType) \
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__TOKEN(Identifier)
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struct Position {
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size_t line;
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size_t column;
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};
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struct Token {
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enum class Type {
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#define __TOKEN(x) x,
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FOR_EACH_TOKEN_TYPE
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#undef __TOKEN
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};
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const char* to_string() const
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{
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switch (m_type) {
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#define __TOKEN(x) \
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case Type::x: \
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return #x;
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FOR_EACH_TOKEN_TYPE
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#undef __TOKEN
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}
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ASSERT_NOT_REACHED();
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}
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Type m_type { Type::Unknown };
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Position m_start;
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Position m_end;
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};
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class Lexer {
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public:
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Lexer(const StringView&);
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Vector<Token> lex();
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private:
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char peek(size_t offset = 0) const;
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char consume();
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StringView m_input;
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size_t m_index { 0 };
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Position m_previous_position { 0, 0 };
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Position m_position { 0, 0 };
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};
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}
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