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** Copyright (C) 2016 The Qt Company Ltd.
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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#pragma once

#include "tokeninfo.h"

#include <iterator>
#include <vector>

#include <clang-c/Index.h>

namespace ClangBackEnd {

class DiagnosticSet;
class Diagnostic;

template<class T>
class TokenProcessorIterator
{
public:
    using iterator_category = std::forward_iterator_tag;
    using value_type = TokenInfo;
    using difference_type = int;
    using pointer = TokenInfo *;
    using reference = TokenInfo &;

    TokenProcessorIterator(std::vector<Cursor>::const_iterator cursorIterator,
                           std::vector<Token>::const_iterator tokenIterator,
                           std::vector<CXSourceRange> &currentOutputArgumentRanges)
        : cursorIterator(cursorIterator),
          tokenIterator(tokenIterator),
          currentOutputArgumentRanges(currentOutputArgumentRanges)
    {}

    TokenProcessorIterator& operator++()
    {
        ++cursorIterator;
        ++tokenIterator;

        return *this;
    }

    TokenProcessorIterator operator++(int)
    {
        return TokenProcessorIterator(cursorIterator++,
                                      tokenIterator++,
                                      currentOutputArgumentRanges);
    }

    bool operator==(TokenProcessorIterator other) const
    {
        return cursorIterator == other.cursorIterator;
    }

    bool operator!=(TokenProcessorIterator other) const
    {
        return cursorIterator != other.cursorIterator;
    }

    T operator*()
    {
        T tokenInfo(*cursorIterator, &(*tokenIterator), currentOutputArgumentRanges);
        tokenInfo.evaluate();
        return tokenInfo;
    }

private:
    std::vector<Cursor>::const_iterator cursorIterator;
    std::vector<Token>::const_iterator tokenIterator;
    std::vector<CXSourceRange> &currentOutputArgumentRanges;
};

} // namespace ClangBackEnd
