在《Modern Template Metaprogramming》这篇演讲中还有一个非常有趣的模板工具,就是void_t. 它的实现可能如下代码所示 template <typename ... Args>structmake_void { typedefvoidtype; }; template<typename ... Args>usingvoid_t = typename make_void<Args...>::type; 或者, template <typename ... Args...
Any sufficiently complex C++ code is indistinguishable from trolling Arthur C. ClarkePrefaceTemplate metaprogramming is one of the things that makes C++ that complex, poor known, and sometimes horrible language. However, its power and expressiveness are some of the best features of C++.Extensible...
STL(Standard Template Library)中的std::array容器是一个固定大小的数组,提供了与C数组类似的功能,并通过模板实现了许多方便的成员函数和操作符重载。 以下是一些std::array容器的特点和使用示例: 固定大小:std::array在创建时需要指定元素个数,之后不能改变大小。这意味着它具有更好的性能和可预测的内存开销。 连...
在Widget模板内,MyAllocList<T>::type是否表示一个类型取决于T是什么,这就是为什么编译器会坚持要求你在前面加上typename。 如果你尝试过模板元编程(template metaprogramming,TMP), 你一定会碰到取模板类型参数然后基于它创建另一种类型的情况。举个例子,给一个类型T,如果你想去掉T的常量修饰和引用修饰(const- or...
在C++ 中,模板(Template)这个概念已经存在二十多年了。作为 C++ 最重要的一个语言构成之一,相关的讨论数不胜数。很可惜的是,深入有价值的讨论很少,尤其是以多个视角来看待这个特性。很多文… C/C++中如何稳定地每隔5ms执行某个函数? 幽州狼 公无渡河,公竟渡河。坠河而死,其奈公何?
Modern CMake for C++ is an end-to-end guide to the automatization of complex tasks, including building, testing, and packaging. You'll not only learn how to use the CMake language in CMake projects, but also discover what makes them maintainable, elegant, and clean. The book also ...
template <typename C> static YesType& test( decltype(&C::ToString) ) ; Obviously, there is no int::ToString method so that the first overloaded method will be excluded from the resolution set. But then, the second method will pass (NoType& test(...)), because it can be called on...
As you'll see, templates and especially template metaprogramming are the keys to powerful compile-time operations. We demonstrate C++20's new template capabilities, including abbreviated function CConcepts templates, templated lambdas and concepts. We introduce type traits for testing type attri- butes...
(e.g. 16 x single precision on a machine, whose SSE vector only has hardware support for 4 x single precision operands). The library uses template metaprogramming techniques to efficiently map array expressions onto the available hardware resources. This greatly simplifies development because it's ...
Template Metaprogramming with C++: Learn everything about C++ templates and unlock the power of template metaprogramming (Marius Bancila, 2022) C++ Concurrency and Distributed Programming Having a “multithreaded” type of mindset if necessary, if you work with modern architectures. The average system ...