cppcon_add_library(service LIBRARIES Asio::asio) add_subdirectory(tests)

overview of what the poster reports on. Title: Pipeline architectures in C++: overloaded pipe operator | std::expected and its monadic operations Brief overview: Functional programming in C++ is the overloaded pipe operator. In this poster I show how to implement a custom pipeline framework that employs std::expected, available since C++23. An overloaded custom pipe operator | will be presented my book about C++ [1][3]. One of the topics was to describe the behavior of the overloaded pipe operator | in std::ranges. I came across Ankur's Satle lecture [4] and decided to expand on this topic –

Speaker notesDATA BUILDING SYSTEMS • Spectrum of possible designs ▪ No data building – use raw text, mesh, image files in game ▪ Full optimisation – use optimised custom formats • Usually somewhere in the latest from cache Different people care about different data at different times Examples include Nav Mesh - or rendering data for global illumination ▶ Process everything in parallel Speaker notesASSUMPTIONS many times Both at construction and during queries Speaker notesSORTING GRID NODES inline bool operator<(const GridNode& left, const GridNode& right) { return std::tie(left.type, left.properties_hash

What’s that alarm? Consequences: ● Swap: performance degradation ● Out-of-memory (OOM) killer: service disruption ● Multi-tenant environment: resources are shared by different processes🚨 90% Memory Fragmentation = 1 - LargestAllocableBlock / TotalFreeMemory mallinfo(3) mallinfo(3) mallinfo service A: Total bytes (arena): 244 355 072 Total in-use allocations: 31 650 352 Total 63 248 External Fragmentation = 0.9997How to estimate Fragmentation? mallinfo(3) mallinfo service B: Total bytes (arena): 33 292 288 Total in-use allocations: 30 316 416 Total free

comparison. A generalization of membership. Similar to operator<=>, but with heterogeneous operands. Interval comparison. Also similar to operator<=>, but not transitive. Result is nonzero if the operands basic mathematical concept that appear in all kinds of algorithms, from recursive sorting to adaptive mesh refinement. Interval notation allows a more natural expression of the idea of an algorithm, replacing cases in stdx::interval because the analysis is exhaustive. Reliability: Testing the intersection operator Eliminating edge cases means exhaustively testing all combinatorial possibilities of constructing

个 bit 用 map 来存储 读取：如果不存在，则读到 0 写入：如果不存在，则创建该表项 用 unordered_map 来存储 map 基于红黑树，会按照键值排序，需要键值具有 operator< 重载，复杂度 O(logn) C++11 新增的 unordered_map 基于哈希表，不保证顺序但更高效，需要键值能被哈希，复杂度 O(1) 用 unordered_map 按 16x16 的稀疏体积，可以存储符号距 离场 (SDF) ，也可以存储烟雾仿真的结果 等。 • 据张心欣说， OpenVDB 赢得了奥斯卡奖 。 • 因为他经常用在影视特效中，主要是符号 距离场有时比 mesh 处理起来方便很多。 OpenVDB 的设计：如果用 SNode 来表示 • hash().pointer(5).pointer(4).dense(3) ZENO 中就大量使用了 OpenVDB • 不过效率比我们手写的低很多…… 不推荐使用 std::vector • 不建议使用 vector 的原因：他返回的不是真正的引用，而是一个重载了 operator= 和 operator bool 的 std::_Bit_reference 对象，而且效率很低。 • 如果配合用 decltype 和 auto 的话，他们不会正确推导出 bool ，影响我们正常使用模板元编

return instance_; } void func(...); private: Singleton(); Singleton(const Singleton&); void operator=(const Singleton&); }; Bloomberg 6 // Somewhere else.cpp Singleton::instance()->func(...); Notable void func(...); static void init(...); private: Singleton(); Singleton(const Singleton&); void operator=(const Singleton&); }; Bloomberg 7 // Somewhere else.cpp Singleton::instance()->func(...); Notable CommWrapper { enum { SERVICE_ID = 249409 }; public : CommWrapper(int service_id = SERVICE_ID); Response send(const Request& req); private: TcpClient raw_client; }; Bloomberg 14 struct Service { static CommWrapper

[conformant/strict] powerful (visual) debugger linter/formatter test framework perf profiler CI/CD service SCM client package manager static analyzer dynamic analyzer (runtime) automated refactoring "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in clang_rt.asan_cxx-i386.lib(asan_new_delete.cc.obj) >uafxcw.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete(void * __cdecl operator new[](unsigned int)" (??_U@YAPAXI@Z) already defined in clang_rt.asan_cxx-i386.lib(asan_new_delete.cc.obj) >uafxcw.lib(afxmem.obj) : error LNK2005: "void __cdecl operator delete[](void

concerns 😍 Move the member into a private namespace … … or into another class (as a separate service).Design for Testability 65 template< class T, class Allocator = std::allocator > Copy constructor Widget& operator=( Widget const& other ); // Copy assignment operator Widget( Widget&& other ) noexcept; // Move constructor Widget& operator=( Widget&& other ) noexcept; // // Move assignment operator ~Widget(); // Destructor Widget( ); // Default constructorResource Management 70 class Widget { public: // ... // ... private: }; // - i as a representative

basis. Because of the awesome discount, the gift card value is going to be $10 for each year of service. To make it even more personal, they will print out a birthday card with the gift card options basis. Because of the awesome discount, the gift card value is going to be $10 for each year of service. To make it even more personal, they will print out a birthday card with the gift card options basis. Because of the awesome discount, the gift card value is going to be $10 for each year of service. To make it even more personal, they will print out a birthday card with the gift card options