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Monday, September 24 • 14:00 - 15:00
How to Write Well-Behaved Value Wrappers

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There are many useful generic types which wrap a number of values up into one object, e.g. std::optional or std::tuple. These types are conceptually very simple, but designing and implementing them to be as optimal and consistent as possible is deceptively difficult. This talk will outline key considerations, show why they matter by examining the assembly generated from compilers, and describe a number of solutions for problems which arise. Finally, a number of C++ standards papers which could ease the implementation burden for these types will be discussed.

Topics covered will include implicit/explicit constructors, conditional deletion of special member functions, propagation of special member triviality, noexcept correctness, private inheritance, and comparison operators.

avatar for Simon Brand

Simon Brand

Senior Software Engineer, GPGPU Toolchains, Codeplay Software
Simon is a GPGPU toolchain developer at Codeplay Software in Edinburgh. He turns into a metaprogramming fiend every full moon, when he can be found bringing compilers to their knees with template errors and debating undefined behaviour on the C++ Slack channel. He co-organises the... Read More →

Monday September 24, 2018 14:00 - 15:00

Attendees (39)