boost::proto::functional::at — 一个 多态函数对象类型,它在其参数上调用 fusion::at()
访问器函数。
// In header: <boost/proto/functional/fusion/at.hpp> struct at : proto::callable { // member classes/structs/unions template<typename This, typename Seq, typename N> struct result<This(Seq, N)> : fusion::result_of::at< typename boost::remove_reference<Seq>::type , typename boost::remove_const<typename boost::remove_reference<N>::type>::type > { }; // public member functions template<typename Seq, typename N> typename fusion::result_of::at< Seq, N >::type operator()(Seq &, N const &) const; template<typename Seq, typename N> typename fusion::result_of::at< Seq const, N >::type operator()(Seq const &, N const &) const; };
一个 多态函数对象类型,它在其参数上调用 fusion::at()
访问器函数。
at
公有成员函数template<typename Seq, typename N> typename fusion::result_of::at< Seq, N >::type operator()(Seq & seq, N const & n) const;
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template<typename Seq, typename N> typename fusion::result_of::at< Seq const, N >::type operator()(Seq const & seq, N const & n) const;
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