## +23 ## Undefined Behavior: What Every Programmer Should Know and Fear ## FEDOR PIKUS ## 20 23 October 01 - 06 ## We will learn: ## • What is Undefined Behavior - And what it is not UB vs implementation-defined implementation-defined behavior vs unspecified behavior • Why have UB in programming languages? • How is UB related to performance? • UB and C++ compilers • How to avoid UB? • How to take advantage of of UB in your own programs? ## What is Undefined Behavior (UB) in C++? • The concept is defined in the standard int f(int k) { • According to the standard, if k > INT_MAX-10, the result is undefined

Virtual Agents ## DAVIDE FACONTI ## 20 23 October 01 - 06 ## What you will learn today 1. What Behavior Trees are 2. About the C++ library BehaviorTree.CPP ## About me • Davide Faconti, nice to meet you 2e9d441565a9dd326035c73ae34/p3_1.jpg) ## How did I end up developing a Behavior Tree Library? Emergency stop ## Behavior Trees in the Game Industry  ## The role of Behavior Trees in robotics In the last 20 years, the de-facto standard in robotics has been (informally) Component

University. Title: Behavior-driven Tests for Microservices-based Algo Trading System ## Summary: Introduction: This poster will introduce a test framework we use at Bloomberg to enable behavior-based tests points: - End-to-end: The test framework validates the end (client) to end (broker/exchange) also behavior. - Controlled external dependencies: All external dependencies including market data, reference

7878d5b9a4de6/p20_1.jpg) ## Undefined Behavior! This is  ## Erroneous behavior for unitialized reads P2795R5 (C++26) - initialized int a; // not initialized int b{a}; // ?? int a; // not initialized int b{a}; // undefined behavior auto double_in_place(int& v) { v *= 2; } Elementary Form: Programming Compiler knows is  ## Undefined Behavior! Is C++ safe? Modern C++: # Effective reference syntax Modern C++ 42 SPECIFIC WAYS TO IMPROVE

Pattern Matching Expressions 57 4.5 Structures 59 4.6 Type Classes 61 4.7 Lists 64 4.8 Binary Trees 69 4.9 Case Distinction and Induction Tactics 71 4.10 Dependent Inductive Types 72 4.11 Summary and applying the rules, building a formal derivation of a typing judgment. Like natural trees, derivation trees are drawn with the root at the bottom. The derived judgment appears at the root, and each constant command described above (Section 1.1.2). But usually, we want to define the function's behavior, and for this we would use def. Going back to the arithmetic expression example (Section 1.2),

Statistics Collector .....268 16.4.8. Client Connection Defaults .....269 16.4.8.1. Statement Behavior .....269 16.4.8.2. Locale and Formatting .....270 16.4.8.3. Other Defaults .....271 20. Localization .....307 20.1. Locale Support .....307 20.1.1. Overview .....307 20.1.2. Behavior .....308 20.1.3. Problems .....309 20.2. Character Set Support .....309 20.2.1. Supported Variables ..... 390 27.12. The Password File ..... 391 27.13. SSL Support ..... 392 27.14. Behavior in Threaded Programs ..... 392 27.15. Building libpq Programs ..... 392 27.16. Example Programs

Statistics Collector ..... 254 16.4.8. Client Connection Defaults ..... 255 16.4.8.1. Statement Behavior ..... 255 16.4.8.2. Locale and Formatting ..... 256 16.4.8.3. Other Defaults ..... 257 Localization ..... 290 20.1. Locale Support ..... 290 20.1.1. Overview ..... 290 20.1.2. Behavior ..... 291 20.1.3. Problems ..... 291 20.2. Character Set Support ..... 292 20.2.1. Supported Variables ..... 366 27.12. The Password File ..... 368 27.13. SSL Support ..... 368 27.14. Behavior in Threaded Programs ..... 368 27.15. Building libpq Programs ..... 369 27.16. Example Programs

Automatic Vacuuming .....305 17.10. Client Connection Defaults .....306 17.10.1. Statement Behavior .....306 17.10.2. Locale and Formatting .....307 17.10.3. Other Defaults .....308 17.11. Lock Localization ..... 338 21.1. Locale Support ..... 338 21.1.1. Overview ..... 338 21.1.2. Behavior ..... 339 21.1.3. Problems ..... 340 21.2. Character Set Support ..... 340 21.2.1. Supported .... 426 28.13. The Connection Service File ..... 427 28.14. SSL Support ..... 427 28.15. Behavior in Threaded Programs ..... 427 28.16. Building libpq Programs ..... 428 28.17. Example Programs

Automatic Vacuuming .....304 17.10. Client Connection Defaults .....305 17.10.1. Statement Behavior .....305 17.10.2. Locale and Formatting .....306 17.10.3. Other Defaults .....307 17.11. Lock Localization ..... 336 21.1. Locale Support ..... 336 21.1.1. Overview ..... 336 21.1.2. Behavior ..... 337 21.1.3. Problems ..... 338 21.2. Character Set Support ..... 338 21.2.1. Supported Variables ..... 421 28.12. The Password File ..... 423 28.13. SSL Support ..... 424 28.14. Behavior in Threaded Programs ..... 424 28.15. Building libpq Programs ..... 424 28.16. Example Programs

Splitting a Commit Deleting a commit The Nuclear Option: filter-branch Reset Demystified The Three Trees The Workflow The Role of Reset Reset With a Path Squashing Check It Out Summary Advanced Merging Maintenance and Data Recovery Maintenance Data Recovery Removing Objects Environment Variables Global Behavior Repository Locations Pathspecs Committing Networking Diffing and Merging Debugging Miscellaneous variable is not set. Git will keep warning you until you set the variable. If you want the default behavior of Git (fast-forward if possible, else create a merge commit): git config --global pull.rebase "false"