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

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

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();

input from web browser . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3 pywebio.output — Make output to web browser . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.4 pywebio.session 103 i ii PyWebIO, Release 1.6.1 PyWebIO provides a diverse set of imperative functions to obtain user input and output content on the browser, turning the browser into a “rich text terminal”, and can intrusive: old script code can be transformed into a Web service only by modifying the input and output operation • Support integration into existing web services, currently supports Flask, Django, Tornado

input from web browser . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3 pywebio.output — Make output to web browser . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.4 pywebio.session 103 i ii PyWebIO, Release 1.6.2 PyWebIO provides a diverse set of imperative functions to obtain user input and output content on the browser, turning the browser into a “rich text terminal”, and can intrusive: old script code can be transformed into a Web service only by modifying the input and output operation • Support integration into existing web services, currently supports Flask, Django, Tornado

input from web browser . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3 pywebio.output — Make output to web browser . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.4 pywebio.session 103 i ii PyWebIO, Release 1.6.3 PyWebIO provides a diverse set of imperative functions to obtain user input and output content on the browser, turning the browser into a “rich text terminal”, and can intrusive: old script code can be transformed into a Web service only by modifying the input and output operation • Support integration into existing web services, currently supports Flask, Django, Tornado

input from web browser . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3 pywebio.output — Make output to web browser . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.4 pywebio.session 103 i ii PyWebIO, Release 1.6.0 PyWebIO provides a diverse set of imperative functions to obtain user input and output content on the browser, turning the browser into a “rich text terminal”, and can intrusive: old script code can be transformed into a Web service only by modifying the input and output operation • Support integration into existing web services, currently supports Flask, Django, Tornado

PyWebIO PyWebIO provides a diverse set of imperative functions to obtain user input and output content on the browser, turning the browser into a “rich text terminal”, and can be used to build simple intrusive: old script code can be transformed into a Web service only by modifying the input and output operation Support integration into existing web services, currently supports Flask, Django, Tornado org/wiki/Body_mass_index] # A simple script to calculate BMI from pywebio.input import input, FLOAT from pywebio.output import put_text def bmi(): height = input("Input your height(cm)：", type=FLOAT) weight =