@CoderCasey

C++ aficionado and MSVC STL developer. He/Him. [email protected]

 Not Twitter.
mastodon.social/@CaseyCarter
Joined September 2014
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  • Followers1.9K
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Note: on #ConfederateHistoryMonth: just a friendly reminder that confederates committed treason to stupidly attack a country with 3 times their manpower and ALL of the military industry, primarily to defend the right to own, trade, beat and rape other humans.
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Replying to @david_sankel
If `s` is address-escaped / a global, a conforming compiler may not introduce a write to `s` when `b` is `false` without potentially introducing a data race.
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Replying to @Angles305 @Chinchillazllla
Why are crickets so strongly attracted to bad jokes?
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Replying to @falco_girgis @vzverovich
"Supporting" is a bit of an overstatement: support for deducing this in MSVC is partial. (I don't recall precisely why other than "it doesn't work in modules yet" but @starfreakclone could explain in detail if you like.)
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Replying to @vzverovich @basit_ayantunde @mattgodbolt
Using "unstabilized" features with libc++ on Compiler Explorer is, err, expert-friendly: godbolt.org/z/aEffYbhcc

Compiler Explorer - C++ (x86-64 clang (trunk))

int main() { auto s = std::format("{}", 42); }

godbolt.org
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Replying to @CoderCasey @vzverovich @basit_ayantunde @mattgodbolt
(github.com/compiler-explorer…, for those lacking context.)

[BUG]: Compiler Explorer uses libstdc++ with Clang by default · Issue #3682 · compiler-explorer/c...

Describe the bug On Linux, the Clang compiler defaults to using libstdc++. The reason is that libstdc++ is the standard library shipped with the system on most Linux distributions, so Clang needs t...

github.com
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Replying to @vzverovich @basit_ayantunde
Your Compiler Explorer example is using libstdc++. See @mattgodbolt ? This is why.
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Replying to @ciura_victor @JamesMcNellis @seanbax @visualc
Ah yes, the "Invisible C++" years.
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Once is an anomaly. Twice is a coincidence. Three times is a pattern. Four times is enough. We've had enough of harassment and coverups. We have failed to make the C++ community safe. It's time for change. Leadership must prioritize safety.
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Replying to @nichols_senator
Hopefully they'll ban dihydrogen monoxide next. It's been found in the water supply of every major urban center in America!
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Replying to @ahmed_moubtahij @hankadusikova @vzverovich
That's the conversion operator version of a deduced return type. The compiler deduces what type the conversion operator produces by looking at the return statements in the function body.
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Replying to @hankadusikova @vzverovich
@hankadusikova @vzverovich
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Replying to @CoderCasey @vzverovich
It's less readable _and_ less efficient!
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Replying to @vzverovich
Why bother with `hello[]` when you could simply (std::cout << ... << str)? (godbolt.org/z/efG97nMjP)

Compiler Explorer - C++ (x86-64 gcc 12.2)

struct greeter { template void operator()() { (std::cout << ... << str); } }; int main() { greeter{}.operator()< 'H', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '!', '\n' >(); }

godbolt.org
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Replying to @elchefe
"Your belt can be a tool to save your life in a Self Defense situation - but certainly not this one."
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Replying to @ciura_victor @MatRopert
"C with member functions"
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Replying to @LAK132
If that's the case, it's probably not a regression which means we won't be able to do much about it unless very many customers report it. Sorry!
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Replying to @LAK132
Default constructing a vector<T> doesn't instantiate any of T's special member functions, except the destructor: godbolt.org/z/PaWEYMnb9. What problem are you seeing?
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Replying to @vzverovich
Undefined Behaviormobile
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Replying to @ericniebler
Where's the "Request Changes" button in the Twitter code review UI?
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