97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
#ifndef VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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#define VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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#if defined(_MSC_VER) || \
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(defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
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(__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
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#pragma once
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#endif
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#include "yaml-cpp/dll.h"
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#include "yaml-cpp/node/detail/node_iterator.h"
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#include "yaml-cpp/node/node.h"
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#include "yaml-cpp/node/ptr.h"
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#include <cstddef>
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#include <iterator>
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namespace YAML {
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namespace detail {
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struct iterator_value;
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template <typename V>
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class iterator_base {
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private:
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template <typename>
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friend class iterator_base;
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struct enabler {};
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using base_type = node_iterator;
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struct proxy {
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explicit proxy(const V& x) : m_ref(x) {}
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V* operator->() { return std::addressof(m_ref); }
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operator V*() { return std::addressof(m_ref); }
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V m_ref;
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};
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public:
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using iterator_category = std::forward_iterator_tag;
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using value_type = V;
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using difference_type = std::ptrdiff_t;
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using pointer = V*;
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using reference = V;
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public:
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iterator_base() : m_iterator(), m_pMemory() {}
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explicit iterator_base(base_type rhs, shared_memory_holder pMemory)
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: m_iterator(rhs), m_pMemory(pMemory) {}
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template <class W>
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iterator_base(const iterator_base<W>& rhs,
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typename std::enable_if<std::is_convertible<W*, V*>::value,
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enabler>::type = enabler())
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: m_iterator(rhs.m_iterator), m_pMemory(rhs.m_pMemory) {}
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iterator_base<V>& operator++() {
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++m_iterator;
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return *this;
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}
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iterator_base<V> operator++(int) {
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iterator_base<V> iterator_pre(*this);
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++(*this);
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return iterator_pre;
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}
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template <typename W>
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bool operator==(const iterator_base<W>& rhs) const {
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return m_iterator == rhs.m_iterator;
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}
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template <typename W>
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bool operator!=(const iterator_base<W>& rhs) const {
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return m_iterator != rhs.m_iterator;
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}
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value_type operator*() const {
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const typename base_type::value_type& v = *m_iterator;
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if (v.pNode)
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return value_type(Node(*v, m_pMemory));
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if (v.first && v.second)
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return value_type(Node(*v.first, m_pMemory), Node(*v.second, m_pMemory));
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return value_type();
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}
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proxy operator->() const { return proxy(**this); }
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private:
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base_type m_iterator;
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shared_memory_holder m_pMemory;
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};
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} // namespace detail
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} // namespace YAML
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#endif // VALUE_DETAIL_ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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