46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
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#ifndef VTR_MAP_UTIL_H
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#define VTR_MAP_UTIL_H
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#include "vtr_pair_util.h"
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#include "vtr_range.h"
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namespace vtr {
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//An iterator who wraps a std::map iterator to return it's key
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template<typename Iter>
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using map_key_iter = pair_first_iter<Iter>;
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//An iterator who wraps a std::map iterator to return it's value
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template<typename Iter>
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using map_value_iter = pair_second_iter<Iter>;
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//Returns a range iterating over a std::map's keys
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template<typename T>
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auto make_key_range(T b, T e) {
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using key_iter = map_key_iter<T>;
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return vtr::make_range(key_iter(b), key_iter(e));
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}
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//Returns a range iterating over a std::map's keys
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template<typename Container>
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auto make_key_range(const Container& c) {
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return make_key_range(std::begin(c), std::end(c));
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}
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//Returns a range iterating over a std::map's values
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template<typename T>
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auto make_value_range(T b, T e) {
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using value_iter = map_value_iter<T>;
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return vtr::make_range(value_iter(b), value_iter(e));
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}
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//Returns a range iterating over a std::map's values
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template<typename Container>
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auto make_value_range(const Container& c) {
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return make_value_range(std::begin(c), std::end(c));
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}
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} //namespace
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#endif
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