rippled/include/xrpl/ledger/detail/ReadViewFwdRange.ipp

#ifndef XRPL_LEDGER_READVIEWFWDRANGEINL_H_INCLUDED
#define XRPL_LEDGER_READVIEWFWDRANGEINL_H_INCLUDED

namespace xrpl {
namespace detail {

template <class ValueType>
ReadViewFwdRange<ValueType>::iterator::iterator(iterator const& other)
    : view_(other.view_)
    , impl_(other.impl_ ? other.impl_->copy() : nullptr)
    , cache_(other.cache_)
{
}

template <class ValueType>
ReadViewFwdRange<ValueType>::iterator::iterator(iterator&& other) noexcept
    : view_(other.view_)
    , impl_(std::move(other.impl_))
    , cache_(std::move(other.cache_))
{
}

template <class ValueType>
ReadViewFwdRange<ValueType>::iterator::iterator(
    ReadView const* view,
    std::unique_ptr<iter_base> impl)
    : view_(view), impl_(std::move(impl))
{
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::iterator::operator=(iterator const& other)
    -> iterator&
{
    if (this != &other)
    {
        view_ = other.view_;
        impl_ = other.impl_ ? other.impl_->copy() : nullptr;
        cache_ = other.cache_;
    }
    return *this;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::iterator::operator=(iterator&& other) noexcept
    -> iterator&
{
    if (this != &other)
    {
        view_ = other.view_;
        impl_ = std::move(other.impl_);
        cache_ = std::move(other.cache_);
    }

    return *this;
}

template <class ValueType>
bool
ReadViewFwdRange<ValueType>::iterator::operator==(iterator const& other) const
{
    XRPL_ASSERT(
        view_ == other.view_,
        "xrpl::detail::ReadViewFwdRange::iterator::operator==(iterator) "
        "const : input view match");

    if (impl_ != nullptr && other.impl_ != nullptr)
        return impl_->equal(*other.impl_);

    return impl_ == other.impl_;
}

template <class ValueType>
bool
ReadViewFwdRange<ValueType>::iterator::operator!=(iterator const& other) const
{
    return !(*this == other);
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::iterator::operator*() const -> reference
{
    if (!cache_)
        cache_ = impl_->dereference();
    return *cache_;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::iterator::operator->() const -> pointer
{
    return &**this;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::iterator::operator++() -> iterator&
{
    impl_->increment();
    cache_.reset();
    return *this;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::iterator::operator++(int) -> iterator
{
    iterator prev(view_, impl_->copy());
    prev.cache_ = std::move(cache_);
    ++(*this);
    return prev;
}

}  // namespace detail
}  // namespace xrpl

#endif