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Introduce Maps::transform_values()

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This commit is contained in:
Alexander Karatarakis 2018-03-14 16:48:18 -07:00
parent aa57df6d6e
commit 69dfad795f
1 changed files with 12 additions and 0 deletions
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12
toolsrc/include/vcpkg/base/util.h
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@ -3,6 +3,7 @@
#include <algorithm>
#include <map>
#include <mutex>
#include <unordered_map>
#include <utility>
#include <vector>
@ -29,6 +30,17 @@ namespace vcpkg::Util
}
}
namespace Maps
{
template<class K, class V1, class V2, class Func>
void transform_values(const std::unordered_map<K, V1>& container, std::unordered_map<K, V2>& output, Func func)
{
std::for_each(container.cbegin(), container.cend(), [&](const std::pair<const K, V1>& p) {
output[p.first] = func(p.second);
});
}
}
template<class Cont, class Func>
using FmapOut = decltype(std::declval<Func&>()(*begin(std::declval<Cont&>())));