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ircd::util: Add basic STL map transformation functors.

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This commit is contained in:
Jason Volk 2017-04-06 17:45:50 -07:00
parent 229a222ff6
commit 8955328479
1 changed files with 23 additions and 0 deletions
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23
include/ircd/util.h
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@ -559,6 +559,29 @@ at(It &&start,
}
//
// Some functors for STL
//
template<class container>
struct keys
{
auto &operator()(typename container::reference v) const
{
return v.first;
}
};
template<class container>
struct values
{
auto &operator()(typename container::reference v) const
{
return v.second;
}
};
//
// Customized std::string_view (experimental TS / C++17)
//