Forward as tuple
http://naipc.uchicago.edu/2014/ref/cppreference/en/cpp/utility/tuple/forward_as_tuple.html WebSep 8, 2014 · std::forward : 'forward' is not a member of 'std' nicow. Good evening everybody, I am pretty new to C++, and still seem to be very attracted to pitfalls. Inspired by this article ...
Forward as tuple
Did you know?
WebDec 11, 2024 · It appears that omitting make_pair() with emplace() in case (5) helped us dispense with one move construction, but we can do even better—this is demonstrated in case (7) where we passed … WebHere we use std::forward_as_tuple to tell the compiler that we want to call the 0-arg constructor. If using fancy C++ standard library features isn’t your cup of tea, you could alternatively use a dummy constructor: int main () { std::vector> list; list.emplace_back (3, 1); } $ ./a.out constructor2 Great!
WebJan 22, 2024 · std::forward_as_tuple constructs the tuple of references to the function arguments, so we can pass them on. And std::make_index_sequence constructs a list of indexes from 0 to its parameter. Extracting the inputs and outputs Now we have a tuple with all the inputs followed by the output, and a list of indexes indicating the positions of the … http://naipc.uchicago.edu/2015/ref/cppreference/en/cpp/utility/tuple/forward_as_tuple.html
WebApr 8, 2024 · This works, because now rather than passing m.emplace a tuple containing a copy of the NonCopyable object, we use std::forward_as_tuple to construct a tuple that … WebSep 28, 2024 · std::forward_as_tuple constructs the tuple of references to the function arguments, so we can pass them on. And std::make_index_sequence constructs a list of indexes from 0 to its parameters count. Extracting the inputs and outputs
WebThis constant value is passed as the first argument to construct a pair object to select the constructor form that constructs its members in place by forwarding the elements of two …
WebApr 10, 2024 · As far as I can follow you can either: (1) Store reference in the tuple and risk dangling references. (2) Move objects into the tuple requiring a move constructor. (3) construct the tuple members in-situ, which is then non-copyable as well. little buddy diapers elfWebstd::forward_as_tuple 在 args 中构造对参数的引用的元组,适合作为参数传递给函数。 当将右值用作参数时,元组具有右值参考数据成员,否则具有左值参考数据成员。 … little buddy heater 20 lb tank adapterhttp://whatastarrynight.com/machine%20learning/python/Constructing-A-Simple-CNN-for-Solving-MNIST-Image-Classification-with-PyTorch/ little buddy heater hoseWebDescription It constructs a tuple object with rvalue references to the elements in args suitable to be forwarded as argument to a function. Declaration Following is the declaration for std::forward_as_tuple. C++98 template tuple forward_as_tuple (Types&&... args) noexcept; C++11 template little buddy glass installation toolWebApr 28, 2024 · The purpose of std::forward_as_tuple is to wrap up a bunch of parameters, probably a parameter pack, into a single object that can be passed as a single non … little buddy heater at northernWebDec 6, 2024 · Tuple A std::tuple that contains any number of elements. Remarks. The template functions return a reference to the value at index Index, or of type T in the tuple … little buddy gas heaterWebConstructs a tuple of references to the arguments in args suitable for forwarding as an argument to a function. The tuple has rvalue reference data members when rvalues are used as arguments, and otherwise has lvalue reference data members. Parameters args … little buddy heater base