cppcheck/lib/tokenrange.h

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/*
* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2023 Cppcheck team.
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*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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//---------------------------------------------------------------------------
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#ifndef tokenrangeH
#define tokenrangeH
//---------------------------------------------------------------------------
#include "config.h"
#include <cstddef>
#include <iterator>
#include <type_traits>
class Token;
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template<typename T, REQUIRES("T must be a Token class", std::is_convertible<T*, const Token*> )>
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class TokenRangeBase {
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T* mFront;
T* mBack;
public:
TokenRangeBase(T* front, T* back) : mFront(front), mBack(back) {}
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struct TokenIterator {
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using iterator_category = std::forward_iterator_tag;
using value_type = T*;
using difference_type = std::ptrdiff_t;
using pointer = void;
using reference = T*;
T* mt;
TokenIterator() : mt(nullptr) {}
explicit TokenIterator(T* t) : mt(t) {}
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TokenIterator& operator++() {
mt = mt->next();
return *this;
}
bool operator==(const TokenIterator& b) const {
return mt == b.mt;
}
bool operator!=(const TokenIterator& b) const {
return mt != b.mt;
}
T* operator*() const {
return mt;
}
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};
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TokenIterator begin() const {
return TokenIterator(mFront);
}
TokenIterator end() const {
return TokenIterator(mBack);
}
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};
class TokenRange : public TokenRangeBase<Token> {
public:
TokenRange(Token* front, Token* back) : TokenRangeBase<Token>(front, back) {}
};
class ConstTokenRange : public TokenRangeBase<const Token> {
public:
ConstTokenRange(const Token* front, const Token* back) : TokenRangeBase<const Token>(front, back) {}
};
#endif // tokenrangeH