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use perfect forwarding to resolve copy/move semantics of universal references - #2651

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artemp 2015-01-28 12:52:59 +01:00
parent c1f6b12d73
commit a8443df1a1
1 changed files with 3 additions and 11 deletions
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14
include/mapnik/params.hpp
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@ -48,19 +48,11 @@ struct value_holder : value_holder_base
value_holder() value_holder()
: value_holder_base() {} : value_holder_base() {}
// copy // perfect forwarding
value_holder(const char* val)
: value_holder_base(val) {}
template <typename T>
value_holder(T const& obj)
: value_holder_base(typename detail::mapnik_value_type<T>::type(obj))
{}
// move
template <typename T> template <typename T>
value_holder(T && obj) noexcept value_holder(T && obj) noexcept
: value_holder_base(std::move(obj)) {} : value_holder_base(std::forward<T>(obj))
{}
}; };
using parameter = std::pair<std::string, value_holder>; using parameter = std::pair<std::string, value_holder>;