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30 lines
697 B
C++
30 lines
697 B
C++
#pragma once
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#include <vector>
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#include <utility>
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namespace vcpkg::Util
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{
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template<class Cont, class Func>
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using FmapOut = decltype(std::declval<Func>()(std::declval<Cont>()[0]));
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template<class Cont, class Func, class Out = FmapOut<Cont, Func>>
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std::vector<Out> fmap(const Cont& xs, Func&& f)
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{
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using O = decltype(f(xs[0]));
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std::vector<O> ret;
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ret.reserve(xs.size());
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for (auto&& x : xs)
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ret.push_back(f(x));
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return ret;
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}
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template<class Container, class Pred>
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void unstable_keep_if(Container& cont, Pred pred)
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{
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cont.erase(std::partition(cont.begin(), cont.end(), pred), cont.end());
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}
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} |