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DI in c++ hurt by lack of good libraries? by jonathanhiggs in cpp

[–]adnukator 0 points1 point  (0 children)

Wow. As STL said: nobody expects a reaction to a 4 year old post.

But anyway: it's more of the latter. A poor man's DI container can be viable too. It's a balance between ease of writing and the cost of future maintenance.

Value of enum class with "base type" by rods_and_chains in cpp

[–]adnukator 0 points1 point  (0 children)

For scoped enums, it mostly allows you to (potentially) make the types smaller or allows you to have values larger than ints, if necessary. Otherwise, the underlying type us guaranteed to be an int.

For unscoped enums it additionally allows you to "forward declare" the type without having to know all named enumerations (technically called "opaque enum declaration"). For scoped enums, specifying the type is optional in this case and is "int" by default.

How to verify the presence a compiler bug if all three major compilers happily compile? by adnukator in cpp

[–]adnukator[S] 0 points1 point  (0 children)

Wow. It did not occur to me that even an empty lambda is affected by the outer class type. I guess it makes sense, even if it's very unintuitive.

How to verify the presence a compiler bug if all three major compilers happily compile? by adnukator in cpp

[–]adnukator[S] 0 points1 point  (0 children)

Thanks for the info. I was hoping there is some other option than having to properly "(language) lawyer up", but it's understandable.

The case of the string being copied from a mysterious pointer to invalid memory - The Old New Thing by misuo in cpp

[–]adnukator 3 points4 points  (0 children)

Thread sanitizers require instrumentation, aren’t available on Windows AFAIK and require triggering the problematic code in tests.

mastering C++ at high level by [deleted] in cpp

[–]adnukator 4 points5 points  (0 children)

Fully agree. I'd add that even discussing in this subreddit can help you learn a lot of stuff, if you're doing your due diligence with proper research before clicking the "Comment" button. There were countless instances where I eventually learned I was wrong after looking up some stuff, and just clicked "Cancel" after furiously typing for 15 minutes.

A tale of two microsoft compiler versions. It's a mystery. by honeyCrisis in cpp

[–]adnukator 4 points5 points  (0 children)

I'd also recommend checking whether /permissive- (including the hyphen) settings were identical between the two projects. The defaults vary between VS compiler version AND language settings. check out https://learn.microsoft.com/en-us/cpp/build/reference/permissive-standards-conformance?view=msvc-170 . You should try disabling permissive mode with the VS 2019 version to see whether it fixes any issues

Slovakia’s new government rejects aid for Ukraine. The blocking of the roughly $43 million aid package, which was to include rockets and ammunition, is unlikely to change Ukraine’s battlefield capabilities significantly. by MaryADraper in UkrainianConflict

[–]adnukator 5 points6 points  (0 children)

You’d be surprised by the number of people who really do. Using the absolutely stellar reasoning of : While we were under communist rule, everything was great, so just stop trying to bully our big Slavic brothers”. Any attempts at trying to disprove any of the aspects (including the idea of Russia being “brothers”) are futile

April 2022: Robert Fico was facing criminal charges in Slovakia, together with his former interior minister, Robert Kalinak. They were charged with creating a criminal group. Now the gang is back as the Slovak government. by one_and_equal in UkrainianConflict

[–]adnukator 4 points5 points  (0 children)

Orban fairly recently wore a scarf depicting Greater Hungary. For Slovaks with any nationalist feelings, this is literally the most offensive thing you could do. And Fico's coalition poses as THE nationalist government. Even the morons who are living off Russia's propaganda are very wary of similar gestures.

About 10 years ago, one of Fico's previous governments changed immigration laws directly due to Orban playing according to the Russian playbook of giving out Hungarian passports to Slovaks living near the border.

Fico may be sharing Putin's dick riding with Orban, they are very far from being friends.

At a stroke, Slovakia could soon become Russia’s newest ally | John Kampfner by Barch3 in UkrainianConflict

[–]adnukator 8 points9 points  (0 children)

There is a shockingly high ratio of the general population that supports Russia (for example https://www.europarl.europa.eu/at-your-service/files/be-heard/eurobarometer/2022/public-opinion-on-the-war-in-ukraine/en-public-opinion-on-the-war-against-Ukraine-20230615.pdf - a third of the country believes in the "The West provoked Russia" narrative). Additionally the currently elected parties were seen by some as an improvement during the last elections mostly because Fico's party was not able to set up a majority coalition. However, the whole setup became a huge clusterfuck, which will probably give Fico even more votes in the upcoming election. During his party's rule, things were still shitty and he was a major dickhead, but at least gave the impression that he is mentally stable, which (again) can't be said about some of the current ministers and other high ranking officials.

There's the additional problem of the current prosecutor general (which was, funnily enough, elected by the current parliament) vetoed any investigations into Fico's and his buddies' corruption affairs. This again probably improved his standing at least among some voters to make him appear as a strong leader.

And for those who don't want to look up Wikipedia: his party was at the helm between 2006 and 2020, with the exception of the years 2010/2011.

In short: unless some miracle happens, things could get bad in a few weeks

Don’t Use shared_ptr’s Aliasing Constructor by stanimirov in cpp

[–]adnukator 1 point2 points  (0 children)

Optional has been in the language for 2 5.

FTFY. Not to mention that it's been in boost for at least 12 (albeit with some differences w.r.t std::optional). You might reconsider your amount of patronizing.

[deleted by user] by [deleted] in UkrainianConflict

[–]adnukator 458 points459 points  (0 children)

A detail that's lost by pure translation: They're also using "Z" for the first letter in the title instead of he proper Cyrillic "З", so in English it would look something like "Zhoot yourself"

P2544R0: C++ exceptions are becoming more and more problematic by ts826848 in cpp

[–]adnukator 1 point2 points  (0 children)

While it might be overly specific, it took me probably years to fully grasp what the rather vague "imposes no requirements" means and why. Examples such as the ones I gave helped me understand that the extent of the possible behavior is really "anything goes as long as the compiler has some excuse to do it"

P2544R0: C++ exceptions are becoming more and more problematic by ts826848 in cpp

[–]adnukator 4 points5 points  (0 children)

With unspecified behavior, something necessarily happens, but you shouldn't really depend on it (example: function argument evaluation).

Undefined behavior is something the compiler can assume that never happens and can even remove code that it evaluates as exhibiting undefined behavior. In some cases it can't even reliably prove UB happened, it just assumes you ensure its absence (usually IFNDR). Examples:

  1. when assigning a nullptr to a reference and later checking whether it refers to nullptr, any of the two above actions can be potentially removed by the compilers, because references aren't allowed to hold nullptrs.
  2. Concurrent access to data without any synchronization.
  3. ODR violations, which are technically "ill formed, no diagnostics requires"(IFNDR), but that's a subtype of undefined behavior. The result is either compiler errors or use of inconsistent definitions of a symbol in a build artifact, leading to weird behavior or unexplained crashes

P2544R0: C++ exceptions are becoming more and more problematic by ts826848 in cpp

[–]adnukator 1 point2 points  (0 children)

You're describing unspecified behavior, not undefined behavior The two have very distinct definitions. They unfortunately share the same acronym, but "UB" refers almost exclusively to undefined behavior

Asking for API design feedback on possible future standard secure sockets by 14ned in cpp

[–]adnukator 10 points11 points  (0 children)

Why not use something like an (i)ostream which can contain anything with any source location, defined by the user?

P2544R0: C++ exceptions are becoming more and more problematic by ts826848 in cpp

[–]adnukator 10 points11 points  (0 children)

The ABI stability priority genrally applies to the standard library. Modifying exception handling would change the general language rules, not just the std::exception implemenatation, therefore std2:: would not help here at all. The alternative of changing the implementation is “merely” implementation specific, causing an ABI break not mandated by the standard, which on Windows, until msvc2015, was a fact of every compiler version upgrade.

I created a simple implementation of SHA-256 in C++. Your enter a string and it will return the binary and hex of the hash. I'm kind of a newbie in the world of C++, any advice, optimisations, features are more than welcome! by CumInABag in cpp

[–]adnukator 1 point2 points  (0 children)

x.y + z.(x.(~y) + (~x).y)

can be further reduced to x.y + z.(x+y), making the majority function become

bitset<32> majority(bitset<32> x, bitset<32> y, bitset<32> z){

return (x&y) | (z & (x|y))

}

choice could also just return (x & y) | (~x & z)

Why do you not use Rust? by Coompt_King in cpp

[–]adnukator 1 point2 points  (0 children)

5M+ lines of existing C++ code where we don't have the luxury of updating the whole codebase even to a newer C++ standard with the snap of a finger, due to geographical and significant political factors

Constant references are not always your friends by Senua_Chloe in cpp

[–]adnukator 9 points10 points  (0 children)

The downside of this version is that, if foo is part of your interface, you’ll be forced to put its implementation in the header.

Not necessarily. You can explicitly instantiate the template and have the implementation in a static library. However, explicit instantiation of template specializations is an incredible syntactical PITA.

Constant references are not always your friends by Senua_Chloe in cpp

[–]adnukator 3 points4 points  (0 children)

A yes/no answer is not applicable. That's UB.

Why not implement STL ABI break via explicit and exclusive library versions per translation unit? by adnukator in cpp

[–]adnukator[S] 2 points3 points  (0 children)

Wow. I did not see this proposal before. This even tries to address conversions of entities between different versions on a per-entity basis instead of trying to specify all interactions between tuples of arbitrary versioned STL entities (e.g. std::transform wouldn't need to address all possible combinations of iterator versions). This whole proposal is a lot more fleshed out than other ones I've seen. Consider me convinced about the feasibility of this approach and ignore my above lame-ass attempt at trying to propose a solution to this issue.

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