d63489d6b8
Like boost's - an iterator that applies a function to the result of an underlying iterator. Unlike boost, it supports using lambdas for the function.
40 lines
955 B
C++
40 lines
955 B
C++
/*
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* Copyright (C) 2014 Cloudius Systems, Ltd.
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*/
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#ifndef UTIL_TRANSFORM_ITERATOR_HH_
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#define UTIL_TRANSFORM_ITERATOR_HH_
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template <typename Iterator, typename Func>
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class transform_iterator {
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Iterator _i;
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Func _f;
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public:
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transform_iterator(Iterator i, Func f) : _i(i), _f(f) {}
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auto operator*() { return _f(*_i); }
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transform_iterator& operator++() {
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++_i;
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return *this;
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}
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transform_iterator operator++(int) {
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transform_iterator ret(*this);
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_i++;
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return ret;
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}
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bool operator==(const transform_iterator& x) const {
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return _i == x._i;
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}
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bool operator!=(const transform_iterator& x) const {
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return !operator==(x);
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}
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};
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template <typename Iterator, typename Func>
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inline
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transform_iterator<Iterator, Func>
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make_transform_iterator(Iterator i, Func f) {
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return transform_iterator<Iterator, Func>(i, f);
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}
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#endif /* UTIL_TRANSFORM_ITERATOR_HH_ */
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