metaprogramming boost.call_traits 基本上就是建立在 boost.type_traits 之上的为了方便确定传递时的类型究竟是传值还是引用做的封装,我们只需要使用 boost::call_traits<T>::param_type 即可(会根据 T 的大小判断传递引用还是传递值更合理),另外也提供了 value、reference 和 const_reference 的 typedef。 用例:解...
std::reference_wrapper<>对象只支持一个操作:向原始对象的隐式类型转换。 template<typename T> void foo(T arg) { T x; } int main(){ std::string s = "hello"; foo(s); // T 为std::string foo(std::cref(s)); // error T 为std::reference_wrapper<std::string> 只支持向std::string...
This book is a high-level overview of Sh and its relationship to other realtime shading and Graphics processing unit programming languages. It is a reference manual and language specification and methodically and exhaustively presents details of the various features of Sh....
std::reference_wrapper<>对象只支持一个操作:向原始对象的隐式类型转换。 template<typename T> void foo(T arg) { T x; } int main(){ std::string s = "hello"; foo(s); // T 为std::string foo(std::cref(s)); // error T 为std::reference_wrapper<std::string> 只支持向std::string...
Apply ML to your projects using just high-school math. With easy-to-follow Python-based exercises, this book sets you on the path to becoming a machine learning expert. customers also reading This book1°2°3° is a practical introduction to the use of metaprogramming to improve the performa...
特性对类型的信息(如 value_type、 reference)进行包装,使得上层代码可以以统一的接口访问这些信息。C++ 模板元编程会涉及大量的类型计算,很多时候要提取类型的信息(typedef、 常量值等),如果这些类型的信息的访问方式不一致(如上面的迭代器和指针),我们将不得不定义特例,这会导致大量重复代码的出现(另一种代码膨胀)...
Everyjava.lang.Classis supplied by Groovy with a specialmetaClassproperty that will give you a reference to anExpandoMetaClassinstance. This instance can then be used to add methods or change the behaviour of already existing ones. By defaultExpandoMetaClassdoesn’t do inheritance. To enable this ...
... 展开 语言非常精确,在术语的使用方面,和cppreference以及draft里的用法一致。示例生动全面,且例子中的一些细节,例如涉及到多态的一些写法,也符合其它文献给出的... 展开
In fact, I think this book is more than just "good" -- it will be an important part of my reference library.Disclaimer: I was provided a copy of this book by Packt for review. This review is my honest opinion of the book. Amazon Verified review Y. Arazi Sep 13, 2022 5 ...
c++lambdametaprogrammingperfect-forwardingforwarding-reference 6 我有以下代码,用于调用对象上的函数并以完美转发的方式传递任何参数。 template <typename F, typename T> inline auto call_with_args(F&& f, T&& t) { return [f = std::forward<F>(f), t = std::forward<T>(t)] (auto&&... arg...