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_v
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...
Modern CMake for C++ isn't just another reference book, or a repackaging of the documentation, but a blueprint to bridging the gap between learning C++ and being able to use it in a professional setting. It's an end-to-end guide to the automation of complex tasks, including building, ...
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...
This technique is often referred to as metaprogramming. Gogol-Döring (2009) gives the example shown in Snippet 3.14. Code Snippet 3.14 “Listing 5: Metaprogram Example. This metaprogram computes the rounded up logarithm to base 2. Call to compute ⌈log 2(c)⌉ for a constant value c...
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 ...
git clone https://github.com/lumia431/reaction.git && cd reaction cmake -B build cmake --build build/ cmake --install build/ --prefix /your/install/pathAfter installation, you can include and link against reaction in your own CMake-based project:...
The obvious solution would be to use metaprogramming:1234 template < class T, size_t N >constexpr size_t countof( const T (&array)[N] ) { return N; } countof(iNeighbors); //compile-time error If we pass to this function, not an array, we get a compilation error. In C ++17 yo...