Back to Basics: Exceptions 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 terminate() is called The compiler does not check this promise A noexcept promise cannot not be taken back Only few functions should be marked with noexcept Destructors are implicitly marked with noexceptHow Code base is never at risk!How to Write Exception-Safe Code 109 and More Correct110 Questions?Back to Basics: Exceptions Klaus Iglberger, CppCon 2020 klaus.iglberger@gmx.de

const T& val) { coll.push_back(val); } std::vector coll1; std::set coll2;std::unordered_set uset; add(coll1, 42); // OK add(coll2, 42); // ERROR: no push_back() C++98 Nico Josuttis Function Templates template void add(CollT& coll, const T& val) { coll.push_back(val); } template void add(CollT& coll, const T& val) { coll.insert(val); c, CollT::value_type v) { c.push_back(v); }; template requires HasPushBack void add(CollT& coll, const T& val) { coll.push_back(val); } template

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Back to Basics: Algorithms Klaus Iglberger, CppCon 2023 klaus.iglberger@gmx.de2 Klaus Iglberger C++ Trainer/Consultant Author of “C++ Software Design” Chair of the CppCon Software Design track work on the data contained in containers • Iterators: The glue between containers and algorithms 6Back To Basics - Iterators on Tuesday at 2pm 78 Let’s have some fun with Algorithms and …9 Picture EXIT_SUCCESS; } One Last Question 96 11 Who is Jeff Albertson?Jeff Albertson - The Comic Book Guy 97Back to Basics: Algorithms Klaus Iglberger, CppCon 2023 klaus.iglberger@gmx.de99

classes, we'll touch on virtual functions, static functions, and operator overloading. We'll circle back to where we began on these topics, again showing you the assembly. At the end of this talk, you will you read and enticed you to join me is here! 7Goal(s) for Today 8Back to Basics: C++ Tour of Functions ● This talk part of the Back to Basics track in which we revisit fundamental ideas of programming Object-Oriented Programming) ○ Remote Procedure Calls ○ Again: I recommend checking out more of CPPCON’s Back to Basics Talks ongoing this year and previous years (Keywords: Object-Oriented Programming, Lambdas

Back to Basics: Concurrency I also do C++ training! arthur.j.odwyer@gmail.com Arthur O’Dwyer 2020-09-18Outline ● What is a data race and how do we fix it? [3–12] ● C++11 mutex and RAII lock types ● Concurrency means doing two things concurrently — “running together.” Maybe you’re switching back and forth between them. ○ Writing slides and answering email ● Parallelism means doing two things if (tokens_.empty()) tokens_.push_back(Token::create()); Token t = std::move(tokens_.back()); tokens_.pop_back(); mtx_.unlock(); return t; } };

1Please do not redistribute slides without prior permission. 2Back to Basics: Concurrency Mike Shah, Ph.D. @MichaelShah | mshah.io | www.youtube.com/c/MikeShah 4:45 pm MDT, Mon. October 25 60 minutes with performance” - Charles Leiserson So how can we get more performance? What are our tools? Back to our original question--what is concurrency ?Parallelism vs Concurrency (programming context) (1/4) trend in architecture. 36 ● The idea of increasing cores to has existed for a long time looking back at early supercomputers ○ 1964 - Seymour Cray pioneers pipelining ○ 1972 - CDC 8600 Multiprocessor

Add cover slide here 1Please do not redistribute slides without prior permission. 2Back to Basics: Pointers Mike Shah, Ph.D. @MichaelShah | mshah.io | www.youtube.com/c/MikeShah 3:15 pm MDT, Mon object’ is responsible for deleting dynamically allocated memory ■ (Note: We have some rules for this: Back to Basics: RAII and the Rule of Zero - Arthur O'Dwyer - CppCon 2019) ● So--in one slide each I want this efficiently? ● If an object is a page in a book ● then a ‘pointer’ would be the index in the back of the book that points you to a specific page. 142 object: A page in a bookA (common) analogy

Casting Or: how to subvert the type system Back to Basics Brian Ruth (he/him) brian.ruth@garmin.comAn Introduction struct region { int size; }; void init_region(char* backing_buffer, size_t std::vector> employees; auto person = std::make_unique("me"); employees.emplace_back(std::move(person)); return 0; } 1. Converts named variables (lvalues) to unnamed variables (rvalues) Bjarne Stroustrup - The Design and Evolution of C++ Scott Meyers – Effective C++ (3rd Edition)THANKS Back To Basics Casting

Cr+ Lambdas Back to Basics: Lambdas NICOLAI JOSUTTIS Cppcon 罗 AN Nicolai M. Josuttis ，iv.end() ， Jitransform elements ofthe invoice iv begin() ， /writing back the result PlusTax) ; to add tax ) ES