51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
// infix_iterator.h
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//
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// Lifted from Jerry Coffin's 's prefix_ostream_iterator
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#pragma once
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#include <iterator>
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#include <ostream>
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#include <sp/protocol/Field.h>
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namespace sp {
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template <class T, class charT = char, class traits = std::char_traits<charT>>
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class OstreamFieldIterator : public std::iterator<std::output_iterator_tag, void, void, void, void> {
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private:
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std::basic_ostream<charT, traits>* m_Os;
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std::string m_Delimiter;
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bool m_FirstElem;
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public:
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typedef charT char_type;
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typedef traits traits_type;
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typedef std::basic_ostream<charT, traits> ostream_type;
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OstreamFieldIterator(ostream_type& a_Stream) : m_Os(&a_Stream), m_Delimiter(0), m_FirstElem(true) {}
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OstreamFieldIterator(ostream_type& a_Stream, std::string&& a_Delimiter) :
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m_Os(&a_Stream), m_Delimiter(std::move(a_Delimiter)), m_FirstElem(true) {}
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auto& operator=(const T& item) {
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// Here's the only real change from ostream_iterator:
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// Normally, the '*m_Os << item;' would come before the 'if'.
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if (!m_FirstElem && !m_Delimiter.empty())
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*m_Os << m_Delimiter;
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*m_Os << sp::PrintableField<T>(item);
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m_FirstElem = false;
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return *this;
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}
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auto& operator*() {
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return *this;
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}
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auto& operator++() {
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return *this;
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}
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auto& operator++(int) {
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return *this;
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}
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};
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} // namespace sp
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