Lightning Talk: The Most Important C++ Feature - Nicolai Josuttis - ACCU 2023

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Lightning Talk: The Most Important C++ Feature - Nicolai Josuttis - ACCU 2023
Slides: accu.org/conf-previous/accu2023/
A talk on the value of destructors and the RAII pattern.
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Nicolai Josuttis
Nicolai M. Josuttis (www.josuttis.com) is well known in the programming community for his authoritative books and talks. For more than 20 years he is a member of the C++ Standard Committee. He is the (co-)author of several worldwide best-sellers, including
"C++20 - The Complete Guide",
"C++17 - The Complete Guide",
"C++ Move Semantics",
"C++ Templates" (with David Vandevoorde and Doug Gregor), and
"The C++ Standard Library".
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#accuconf #programming #destructor

[@tomaszstanislawski457]

I agree that C could benefit from some form of *explicit* and *optional* RAII, there is even a proposal to add "defer" statement to address this issue.

[@iamjadedhobo]

I fully agree with Nicolai.
When I had to do some coding in C# (when it was just new) deterministic destruction/cleanup/closing of a resource was *the major* thing I was missing. Having to go back to resorting to C idioms was just painful.

[@roykin0929]

Thumbnail spoiled it, but I agree 100%

[@codertopics343]

I agree 100% :)

[@segfault4568]

when templates and constexpr showed up I was like YAY these are the ones, turns out its a destructor.

[@tylovset]

RAII was already in C, though.
#define RAII(declvar, destruct) for (declvar, ***_i, **_ip = &_i; _ip; _ip = 0, destruct)
RAII (FILE* f = fopen(name, "r"), fclose(f))
{
if (!f) return ERROR;
...
if (done) continue;
...
} // end of f's lifetime

[@Vitorian]

Taboo: everyone secretly hates move semantics.