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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* 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 <AK/StringView.h>
#include <AK/Vector.h>
namespace GUI {
#define FOR_EACH_TOKEN_TYPE \
__TOKEN(Unknown) \
__TOKEN(Whitespace) \
__TOKEN(PreprocessorStatement) \
__TOKEN(IncludeStatement) \
__TOKEN(IncludePath) \
__TOKEN(LeftParen) \
__TOKEN(RightParen) \
__TOKEN(LeftCurly) \
__TOKEN(RightCurly) \
__TOKEN(LeftBracket) \
__TOKEN(RightBracket) \
__TOKEN(Less) \
__TOKEN(Greater) \
__TOKEN(LessEquals) \
__TOKEN(GreaterEquals) \
__TOKEN(LessLess) \
__TOKEN(GreaterGreater) \
__TOKEN(LessLessEquals) \
__TOKEN(GreaterGreaterEquals) \
__TOKEN(LessGreater) \
__TOKEN(Comma) \
__TOKEN(Plus) \
__TOKEN(PlusEquals) \
__TOKEN(Minus) \
__TOKEN(MinusEquals) \
__TOKEN(Asterisk) \
__TOKEN(AsteriskEquals) \
__TOKEN(Slash) \
__TOKEN(SlashEquals) \
__TOKEN(Percent) \
__TOKEN(PercentEquals) \
__TOKEN(Equals) \
__TOKEN(EqualsEquals) \
__TOKEN(Semicolon) \
__TOKEN(DoubleQuotedString) \
__TOKEN(SingleQuotedString) \
__TOKEN(EscapeSequence) \
__TOKEN(Comment) \
__TOKEN(Integer) \
__TOKEN(Float) \
__TOKEN(Keyword) \
__TOKEN(KnownType) \
__TOKEN(Identifier)
struct CppPosition {
size_t line;
size_t column;
};
struct CppToken {
enum class Type {
#define __TOKEN(x) x,
FOR_EACH_TOKEN_TYPE
#undef __TOKEN
};
const char* to_string() const
{
switch (m_type) {
#define __TOKEN(x) \
case Type::x: \
return #x;
FOR_EACH_TOKEN_TYPE
#undef __TOKEN
}
ASSERT_NOT_REACHED();
}
Type m_type { Type::Unknown };
CppPosition m_start;
CppPosition m_end;
};
class CppLexer {
public:
CppLexer(const StringView&);
Vector<CppToken> lex();
private:
char peek(size_t offset = 0) const;
char consume();
StringView m_input;
size_t m_index { 0 };
CppPosition m_previous_position { 0, 0 };
CppPosition m_position { 0, 0 };
};
}
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