Calling Functions A Tutorial Klaus Iglberger, CppCon 2020 klaus.iglberger@gmx.de2 Klaus Iglberger C++ Trainer since 2016 Author of the C++ math library (Co-)Organizer of the Munich Two-Phase Lookup Template Argument Deduction SFINAE Overload Resolution (Viable) Candidate Functions Ranking Ambiguous Function Calls Access Labels Function Template Specializations Virtual Two-Phase Lookup Template Argument Deduction SFINAE Overload Resolution (Viable) Candidate Functions Ranking Ambiguous Function Calls Access Labels Function Template Specializations Virtual

for many years -- please provide suggestions, analogies, and other useful ways to think about functions now or in the future!Please do not redistribute slides without prior permission. 4Your Tour Guide for the talk ● Located here: https://github.com/MikeShah/Talks/tree/main/2023/cppcon/functions 6Abstract Functions are one of the first things programmers learn, granting you the ultimate power to 'reuse' overview of functions from the start to the end, on the various powers that are given to us from the ground up. Consider this talk your one stop for learning all of the great things about functions! We'll

From Functions to Coroutines 40 Years Evolution Rainer Grimm Training, Coaching, and Technology Consulting www.ModernesCpp.netEvolution of Callable template T invoke(Func sequence of functions can be changed ▪ Automatically parallelizable ▪ Results can be cachedPure Functions Working with a pure function is based on discipline Use common functions, meta-functions, constexpr constexpr, or consteval functions ▪ Function int powFunc(int m, int n){ if (n == 0) return 1; return m * powFunc(m, n - 1); } ▪ Meta-Function template struct PowMeta { static int const value

Python in Azure Functions 基于Python的Azure Functions实践 赵健 - Microsoft 目录 CONTENTS Python 在 Azure 中无处不在 粘合剂 – Azure Functions Azure Functions 实践 Python 在 Azure 中无处不在 IEEE Spectrum’s sixth annual interactive Dev Tools Azure DevOps Azure NoteBook 运行 Python 代码 VM App Service Functions AKS ACI Azure Batch Notebook 连接 & 集成 Azure服务 Functions 认知服务 CosmosDB Event Grid Blob … Python 应用在Azure中的多种方式 Cloud-Optimized Cost control and Operations model Azure Azure 粘合剂 – Azure Functions Serverless in Azure – FaaS 是 Serverless 架构的核心 什么是 Azure Functions .NET, Node, Java, Docker, PHP, Ruby, Python Staging & deployment

virt_duration = end-start;There are interesting technical details and surprising conclusions that virtual functions can be actually faster. Since CPU architectures are mentioned, I'd expect to see deep assembly eritance-vs-other- ways-performanceDoes it even matter?Conclusions ● The notion that “virtual functions are slower” is flat out wrong. ○ Which is not to say they are faster ○ Some of the suggested

… … Stack Traces for Async Code are Unhelpful Threadpool threads: #0 process_file(...) #5 pool.run() #10 __clone … … IO Thread: #0 async_read_some_at(...) #3 ctx Threadpool threads: #0 process_file(...) #5 pool.run() #10 … IO Thread: … #0 async_read_some_at(...) #3 ctx.run() #5 __clone … … Main thread: #0 unifex::sync_wait( … #0 async_read_some_at(...) … #12 unifex::sync_wait(...) #16 main() #19 __libc_start_main() … … Async Stacks are BetterStructured Concurrency Makes Async Stacks Possible

Helmut Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 1 / 39Helmut Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 2 / 39 About Myself • Professor Processing) Technical Committee 14 Entertainment ComputingHelmut Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 3 / 39 Creating Game Engines with C++ • Vienna Game Job System Vulkan Game Engine 2.0 https://github.com/hlavacs 20Helmut Hlavacs – Combining Co-Routines and Functions into a Job System - CppCon 2021 4 / 39 The Game Loop auto prev = high_resolution_clock::now();

之类的 async runtime 中执行一些特别的 WASM 时就会遇到 WASM 阻塞 tokio 最终导致服务不可用的情况。 阻塞示例 WASM 使用场景和问题 利用语言本身 Async 机制 因为 Rust 的 async 机制是无栈协程，会将 async 部分在编译时隐式转换成一个 Future。 所以我们可以利用这一点来实现一个 Async 的 Wasm。 Async Wasm Photo / image / chart 利用本身 Async 机制 自行实现 Async Runtime Async 的 Wasm • 在 wasm 中把 future 存入固定内存处。 • 导出 poll 函数给 host 调用。 • 把 host function 包装成自定义 Future。 • 实现简单 利用本身 Async 机制 优点 • 方案不通用（wasm 局限于某一种语言） 无法与现有生态配合 缺点 Async 的 Wasm 基于 fiber / ucontext Async Wasm 解决方案 wasmtime-fiber 是一个通过内联汇编，保存当前寄存 器和栈数据来实现有栈协程的 rust 库。 wasmtime-fiber Ucontext 和 fiber 功能相同，但是 linux 的系统库。 ucontext 执行流程 Async Wasm 解决方案

function is a block of any number of statements and expressions that, as a whole, perform a task. Functions may or may not return data after they are done performing their task. If a function cannot perform print the Hello, world! message to standard output. Functions sometimes need information to perform their task. In Zig, information is passed to functions between an open parenthesis ( and a close parenthesis having to handle the failure case of printing to standard output, you can use alternate functions: the functions in std.log for proper logging or the std.debug.print function. This documentation will

35 1 6.4.1 Scopes and Shadowing . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.5 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.6 Macros . . . . . . . . . . . . 76 IV Day 2: Afternoon 78 14 Welcome Back 79 15 Generics 80 15.1 Generic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 15.2 Generic Data Types . . Unions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 30.5 Unsafe Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 30.6 Implementing Unsafe