system integrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.5 New custom user commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . achieve a better IDE integration, for example via CMakeP- resets.json. See also: • Tools reference 2.5 New custom user commands Conan 2 allows extending Conan with custom user commands, written in python include versions 1.3 and 1.8.1, but will exclude versions like 0.8 or 2.0. Likewise requires = "pkg/[~2.5]" will include 2.5.0 and 2.5.3, but exclude 2.1, 2.7, 2.8. The caret ^ operator is very similar to

ncu：侯俊杰的深入Visual C++（Inside visual C++ 中译本）不错， 适合初学者对MFC 做初步的认识与应用。深入浅出MFC 这一本原理讲的较多。 Sagitta.bbs@firebird.cs.ccu.edu.tw：Inside Visual C++ 4.0 不是初学者用的书，因为它未从 最基本观念讲起。深入浅出MFC 前半本都在描述(或说仿真) MFC 的内部技术，甚至挖 以及DYNAMIC 宏，组织起所谓的类别型录网 Frame4：仿真IsKindOf（执行时期对象类别的鉴识能力，也就是所谓的RTTI） Frame5：仿真Dynamic Creation（MFC 2.5 的作法）（在本新版中已拿掉） Frame6：仿真Dynamic Creation（MFC 4.x 的作法） Frame7：仿真Message Map Frame8：仿真Command 第１章增加Console 程序设计，以及Win32 多线程程序实例Mltithrd。 3. 第２章增加「四种不同的对象生存方式」一节。 4. 第３章去除原有之Frame5 程序（该程序以MFC 2.5 的技术仿真Dynamic Creation）。 5. 第４章全部改为Visual C++ 5.0 使用画面，并在最后增加一节「Console 程序 的项目管理」。 6. 第６章增加「奇怪的

3 symbol t; 4 symbol phi; 5 6 formula f = a ∗ sin(w ∗ t + phi ); 7 8 double y = f(a = 5.0, w = 2.5, t = 1.6, phi = 0); CppCon - Vincent Reverdy - October 4th, 2023 - Aurora, Colorado, USA 10 CC0 1 3 symbol t; 4 symbol phi; 5 6 formula f = a ∗ sin(w ∗ t + phi ); 7 8 double y = f(a = 5.0, w = 2.5, t = 1.6, phi = 0); // Binding here The idea operator= should return an object that binds the value formula Introductory example 1 formula f = a ∗ sin(w ∗ t + phi ); 2 3 double y = f(a = 5.0, w = 2.5, t = 1.6, phi = 0); // Substitution ! Starting from the formula 1 template

0; MatrixXd mtx{2, 2}; // 0-index as is the case in C++ generally: mtx(0, 0) = 3.0; mtx(1, 0) = 2.5; mtx(0, 1) = -1.0; mtx(1, 1) = mtx3(1, 0) + mtx3(0, 1); // Similar for Vector types Eigen MatrixXd {1.0, 2.0, 3.0}, {1.5, 2.5, 3.5}, {4.0, 5.0, 6.0}, {4.5, 5.5, 6.5}, {7.0, 8.0, 9.0} }; MatrixXd B { {1.0, 2.0, 3.0, 4.0, 5.0}, {1.5, 2.5, 3.5, 4.5, 5.5}, {5.0, 6 Eigen: Scalar Multiplication Daniel Hanson CppCon 2024 15MatrixXd A { {1.0, 2.0, 3.0}, {1.5, 2.5, 3.5}, {4.0, 5.0, 6.0}, {4.5, 5.5, 6.5}, {7.0, 8.0, 9.0} }; MatrixXd mtx_sum = A + C; cout

Range-based for loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2.5 Templates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . double& t) { return t + 0.001; } int main() { std::cout << print_type_info(5) << std::endl; 25 2.5 Templates CHAPTER 02: LANGUAGE USABILITY ENHANCEMENTS std::cout << print_type_info(3.14) << std::endl; 1; // writeable } for (auto element : vec) std::cout << element << std::endl; // read only } 2.5 Templates C++ templates have always been a special art of the language, and templates can even be

evaluate function arguments lazily. we'll need to evaluate function arguments lazily. 52TAKE 2.5 TAKE 2.5 return fmap(l, lazy_call(foo, i), lazy_call(bar, i)); template lazy{[&] { return std::invoke(std::forward(f), std::forward(args)...); }}; } 53TAKE 2.5 TAKE 2.5 template struct lazy { F f{}; std::invoke_result_t opt{}; constexpr explicit(true) auto operator*(this Self&& self) { return *(std::forward(self).opt); } }; 54TAKE 2.5 TAKE 2.5 Better? Maybe? Yes? Better? Maybe? Yes? Take your pick. Use lazy evaluation if you want. Take

区间 for 迭代 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.5 模板 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . std::endl; } 区间 for 迭代 终于，C++11 引入了基于范围的迭代写法，我们拥有了能够写出像 Python 一样简洁的循环语句， 我们可以进一步简化前面的例子： 23 2.5 模板 第 2 章语言可用性的强化 #include #include #include int main() { std::vector 1; // writeable } for (auto element : vec) std::cout << element << std::endl; // read only } 2.5 模板 C++ 的模板一直是这门语言的一种特殊的艺术，模板甚至可以独立作为一门新的语言来进行使用。 模板的哲学在于将一切能够在编译期处理的问题丢到编译期进行处理，仅在运行时处理那些最核心的动

51quantity q1 = 2.5 * m; quantity q2 = q1; // Compile-time error CppCon 2024: Improving our safety with a quantities and units library Preventing truncation of data 52quantity q1 = 2.5 * m; quantity2.5 * m; quantity q2 = q1; // Compile-time error • Truncating conversion can be explicitly forced from the code quantity q1 = 2.5 * m; quantity

from intto double, the compiler won’t convert xinto a doublein this call: int x = 1; double y = 2.5; double z = max(x, y); // compile error: can't deduce T  Instead, the compiler rejects the call explicitly call max, the compiler will perform the implicit conversion: int x = 1; double y = 2.5; double z = max(x, y); // OK: converts x to double  Similarly, calling maxwould implicitly

faster 1 2 0 5 10 15 20 25 30 35 40 45 50 47 27 Series1 Open C++ File 2.4x faster 1 2 0 0.5 1 1.5 2 2.5 2.02 0.82 Series1 IntelliSense Ready* 1.9x faster *) Colorization + Member List 1 2 0 1 2 3 4 5 6