King_DuckZ
4d904ac689
Also put iterator into dhandy namespace. I don't remember why I left it out, and it's probably a sign I should have not done so.
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
// see http://stackoverflow.com/questions/3496982/printing-lists-with-commas-c/3497021#3497021
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// infix_iterator.h
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//
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// Lifted from Jerry Coffin's 's prefix_ostream_iterator
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#if !defined(INFIX_ITERATOR_H_)
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#define INFIX_ITERATOR_H_
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#include <ostream>
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namespace dhandy {
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template <class T,
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class charT=char,
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class traits=std::char_traits<charT> >
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class infix_ostream_iterator
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{
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std::basic_ostream<charT,traits> *os;
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charT const* delimiter;
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bool first_elem;
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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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using iterator_category = std::output_iterator_tag;
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using value_type = void;
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using difference_type = void;
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using pointer = void;
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using reference = void;
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infix_ostream_iterator(ostream_type& s)
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: os(&s),delimiter(0), first_elem(true)
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{}
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infix_ostream_iterator(ostream_type& s, charT const *d)
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: os(&s),delimiter(d), first_elem(true)
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{}
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infix_ostream_iterator<T,charT,traits>& operator=(T const &item)
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{
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// Here's the only real change from ostream_iterator:
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// Normally, the '*os << item;' would come before the 'if'.
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if (!first_elem && delimiter != 0)
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*os << delimiter;
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*os << item;
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first_elem = false;
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return *this;
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}
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infix_ostream_iterator<T,charT,traits> &operator*() {
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return *this;
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}
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infix_ostream_iterator<T,charT,traits> &operator++() {
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return *this;
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}
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infix_ostream_iterator<T,charT,traits> &operator++(int) {
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return *this;
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}
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};
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} //namespace dhandy
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#endif
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