std::transform应用给定的函数到某个/些输入范围中的元素,并将结果存储到从d_first开始的输出范围。 1)应用一元函数unary_op到[first1,last1)中的元素。 如果unary_op使以下某个范围中的某个迭代器失效,或者修改了以下某个范围中的某个元素,那么行为未定义: [first1,last1]。 包含std::distance(f
transform Create account std::transform Defined in header<algorithm> template<classInputIt,classOutputIt,classUnaryOp> OutputIt transform(InputIt first1, InputIt last1, OutputIt d_first, UnaryOp unary_op); (1)(constexpr since C++20) template<classExecutionPolicy,...
1)等价于transform_reduce(first1, last1, first2, init, std::plus<>(),std::multiplies<>()),实际上是默认的std::inner_product的等效并行版本。 3)应用transform到来自范围[first1,last1)和从first2开始的包含std::distance(first1, last1)个元素的范围的每对元素,并在reduce上与初始值init一同规约各...
end(), std::ostream_iterator<int>(std::cout, " "), 0, std::plus<int>{}, times_10); std::cout << "\n10 times inclusive sum: "; std::transform_inclusive_scan(data.begin(), data.end(), std::ostream_iterator<int>(std::cout, " "), std::plus<int>{}, times_10); std::...
否则,如果 支持promise.await_transform(expr)那么awaitable是promise.await_transform(expr) 否则awaitable就是expr 获取awaiter(即成员函数包含await_readyawait_suspendawait_resume的class) 如果 重载了operator co_await, 那么使用重载operator awaitable::co_await或者operator co_await(awaitable) ...
operator-(transform_view::iterator,transform_view::sentinel) (C++20) constexpr/*iterator*/<false>begin(); (1)(since C++20) constexpr/*iterator*/<true>begin()const requiresranges::range<constV>&& std::regular_invocable<constF&,ranges::range_reference_t<constV>>; ...
std::ranges::transform_view template<classR,classF> transform_view(R&&, F)->transform_view<views::all_t<R>, F>; (C++20 起) 为std::ranges::transform_view提供一个推导指引以允许从range和变换函数推导。 示例 本节未完成 原因:暂无示例...
std::ranges::transform_view<V,F>::transform_view From cppreference.com transform_view()requiresstd::default_initializable<V>&& std::default_initializable<F>=default; (1)(since C++20) constexprexplicittransform_view(V base, F fun);
std::regex_traits<CharT>::transform template<classForwardIt> string_type transform(ForwardIt first, ForwardIt last)const; Obtains the sort key for the character sequence[first,last), such that if a sort key compares less than another sort key withoperator<, then the character sequence that pro...
Effectively returns std::invoke(*parent_->fun_, *current_), where *parent_->fun_ is the transformation function stored in the parent transform_view, and current_ is the underlying iterator into V. Parameters(none) Return valueThe transformed element. Notes...