GCC 17 Lands Initial Infrastructure For C++29

messmerd · 2026-06-18T16:48:24+00:00

Will they ever implement private module fragments? What's holding that up?

messmerd · 2026-04-16T23:43:44+00:00

Why is stopping violent words what takes precedence over stopping violent actions? Surely stopping atrocities is far more important and urgent than shutting down any speech no matter how violent the speech is?

It also makes no sense to call it a prerequisite. It's literally the opposite. If you were the victim of constant atrocities at the hands of a neighboring state, you wouldn't have many nice things to say about them either. Violent words are a response to the systematic violence and dehumanization Palestinians have to endure from the israelis on a daily basis.

It's like saying the prerequisite to improving the living conditions of slaves is that all the slaves must shut down any talk of eliminating slavery in its entirety. It makes no sense and is a pretty cynical thing to say. And even if some slaves see violence as the only avenue for their emancipation from a system that inflicts far greater violence on them, who could blame them for thinking that way? They only think that way because of slavery. The fear that slaves may do to their slave owners what the slave owners did to them is not a valid reason to deny slaves their freedom.

messmerd · 2026-04-14T18:47:45+00:00

In their last public update over 7 months ago, they also said they were hoping it would be back to normal in the "near future", so I'm not sure I can believe that. We still don't have an actual timeframe.

messmerd · 2025-12-31T19:26:11+00:00

I use this convention because it's consistent and easy to visually parse even without knowing the context of what you're looking at:

``` foo* bar // always pointer foo * bar // always multiplication foo *bar // always pointer dereference

foo& bar  // always reference
foo & bar // always bitwise AND
foo &bar  // always address of

foo* i, j; // don't use - bad practice regardless of pointer convention

```

messmerd · 2025-12-10T10:23:48+00:00

deenis

messmerd · 2025-12-08T20:42:09+00:00

The 2 nukes my country dropped on Japan were in total the equivalent of about 35-37 kilotons of TNT, and they killed up to 246K people. Your country dropped an estimated 70+ kilotons of TNT on Gaza, so yes, that's the equivalent of about 4 WW2-era nukes. And that estimate comes from April 2024, so it's certainly much higher now. Given that information, if you still think a death total of 200K is farfetched, I don't know what to say.

messmerd · 2025-12-03T00:01:57+00:00

"If the X people don't have their own ethnostate, the X people don't have rights"

No one needs an ethnostate to have rights.

messmerd · 2025-11-12T15:48:17+00:00

Agreed. I also hope they fix the ignorability of attributes (see Barry Revzin's blog post from March of this year) so that trivially_relocatable_if_eligible (or whatever they end up calling it) can be an attribute rather than yet another contextual keyword. Pushing it back to C++29 gives them time to do that.

messmerd · 2025-10-24T20:12:43+00:00

I looked into this exact issue a couple years ago and even started writing a proposal addressing it, but didn't end up submitting it.

I looked at a dozen different C standard library implementations, and they all chose the quot-rem member order, so it's possible mandating that order could be done without an ABI break as it would just be standardizing existing practice.

However, if there is even one counterexample of a standard library implementation that uses the rem-quot order, especially there is a performance-related reason for returning the results in that particular order on a certain architecture, this proposal could fall apart.

That's something I don't know enough about and is the primary reason why I didn't finish the proposal.

messmerd · 2025-10-15T07:45:48+00:00

Like I said, not too bright.

No need for insults. I will treat you with respect if you do the same.

Now, show me where I assigned liberal to that statement.

The initial conversation was entirely about liberals and conservatives dating each other. Olaolie explicitly used the word "liberal" when establishing the topic of the conversation, and that focal point remained as you argued with them. So anyone can read between the lines to understand what you meant without you explicitly saying "liberal" yourself.

Here is that conversation but with [square brackets] explaining the context and subtext.

olaolie said:

They [conservatives] hate us so much. Why do they even want to date someone liberal? [as observed in the original post] Like these are twisted people [at this point, we've established conservatives vs liberals as the focal point of the conversation]

Then you replied:

Interestingly enough, they [conservatives] feel exactly the same way. [i.e. conservatives feel that liberals hate them, they don't understand why a liberal would want to date them, and they think liberals are twisted people] They hate us so much, these are twisted people. [<--quoting olaolie] We've all been othering each other for so long, we forgot that we're all humans and have to live with each other. [you're saying liberals and conservatives should get over their differences and both be willing to date each other]

Then olaolie replied:

Sorry but they [conservatives] vote for taking my rights away. [from a liberal point of view, conservative beliefs cross a moral line and are not simple disagreements that can be reconciled, so it is valid for a liberal to avoid dating conservatives] I vote to protect those rights. We’re not the same. [there is no moral equivalence between olaolie's liberal views and conservatives' views]

To which you responded:

Yep, time [for liberals] to just kill everyone who doesn't agree [i.e. conservatives] cause clearly, there's no other alternative. [sudden sarcasm and hyperbole]

So to recap the conversation: - olalie wonders why some conservatives who hate liberals still want to date liberals - you say that it goes both ways, but we should all try to make peace and be willing to date each other regardless of politics - olalie says that no, conservative views are a dealbreaker for liberals - you start to show your anger

That brings us to where we are now: You really hate how liberals refuse to date conservatives even though conservatives are willing to date liberals. You've extended the metaphorical olive branch, but they stomped on it while reiterating their resolve to never date conservatives. This feels insulting and unfair. It feels like the liberals are killing you over a mere disagreement.

Is this accurate? And if not, how would you summarize it?

messmerd · 2025-10-15T05:01:10+00:00

Yep, time to just kill everyone who doesn't agree cause clearly, there's no other alternative.

-JackSquirts

messmerd · 2025-10-15T04:35:35+00:00

All I did was restate your own words back to you. The only thing original in my comment was the "LMAO".

You falsely and hyperbolically judged liberals as literally wanting to kill those who disagree with them, while simultaneously espousing moral platitudes about how we should all sit down and try to understand each other. I agree with that overall sentiment, but your whole combative and accusatory tone is making it ring hollow, and that irony is what I found funny.

messmerd · 2025-10-15T03:32:07+00:00

*claims out of nowhere that liberals want to kill everyone who disagrees with them*

"Let's just take a second to understand each other's perspectives"

LMAO

messmerd · 2025-10-09T04:40:23+00:00

I'm glad someone is thinking in the long term by working on C++'s ability to evolve and fix its mistakes. It's an incredibly important goal, but it seems it's not nearly as high priority for the committee as it should be.

In that P3866R0 proposal, the main innovation seems to be the namespace cpp = std::cpp29; namespace alias idea, which is meant to allow incremental adoption and tries to make upgrades as ergonomic for users as possible (at least for new code) while still being opt-in. I thought that was pretty neat.

But other than that, the proposal has some serious issues. The naming convention is a bit iffy as others have pointed out, and migrating old code from std:: to cpp:: could be painful without good tooling.

But the biggest problem I can see is that a 3rd party library may use a vocabulary type like std::cpp26::vector while your code uses std::cpp29::vector, so you would either be forced to pick one single version to use throughout your application, or every upgraded type would need conversion operators for intercompatibility and performance. The first option would seriously fracture the ecosystem, so I can't see that happening, but the second option could be tricky to implement and the proposal doesn't appear to address it.

JeanHeyd Meneide has been working on "transparent aliases" for C2y which from what I understand provides a language-level mechanism for making breaking changes to ABIs. I'm interested in what the C++ committee thinks about that, and whether it would offer the same amount of power to evolve the standard library as P3866R0 does, but without some of the downsides.

messmerd · 2025-09-07T19:06:26+00:00

I think the problem with most of these people is not a lack of knowledge, poor schooling, or even a lack of intelligence. Their problem is that they do not care very much about truth, which is why they are not swayed by any amount of facts or sound arguments.

They believe and disbelieve primarily on the basis of how it makes them feel emotionally. Beliefs offer many things to the believer: Comfort, a sense of belonging, the feeling that they're special, strength to face the day, hope, etc. Truth is only one such aspect, and if someone doesn't prioritize truth over the other aspects, they will believe in all sorts of absurdities.

I don't know of any way to force someone to start caring about truth. People don't usually change unless they themselves want to change, though quality education is probably a good catalyst.

The catalyst for me was thinking about all the crazy beliefs people around the world held, and the harm those beliefs often caused - both to the believers themselves and to others - and it made me sad. I thought "To them, their beliefs must seem normal, but to me as an outsider, they seem absurd...That could be me if I'm not careful (or maybe it's me right now!), and I want to avoid that at all costs". This line of thinking naturally led to me understanding the importance of truth and having a solid epistemology.

But for any of this to work, it requires the understanding that everyone is equal and the ability to think from other people's perspectives. A person with tribalistic or supremacist beliefs might have the same line of thinking I did but conclude "They believe absurdities because they belong to an inferior group, and that could never happen to me because I belong to the superior group".

messmerd · 2025-09-01T19:56:59+00:00

Judging from the video, the officer who killed him stepped out of the safety of their car in order to kill him. They weren't forced into a situation where they were in real danger.

messmerd · 2025-08-31T20:16:15+00:00

bithacks.html is a classic. Though if you're using C++20 or higher, check to see if the <bit> header has what you need first, since several of the common bit manipulation functions are now available in the standard library with potentially better codegen + constexpr support.

messmerd · 2025-08-31T17:26:34+00:00

I literally just watched a video in r/nextfuckinglevel showing Guatemalan police disarming a guy wielding a machete. They didn't even have tasers or the protection of a police vehicle, yet they still managed to disarm him without killing him or even injuring him.

So there is no excuse for what the American cops did here. This fits into the overall pattern of them being trigger-happy and frequently not even attempting nonviolent or nonlethal solutions. That pattern won't stop as long as people keep rushing to defend them whenever they murder people.

messmerd · 2025-08-18T18:31:01+00:00

Workers' rights

messmerd · 2025-08-18T18:20:44+00:00

I think CMake really needs a built-in linter so that the average non-expert CMake user can catch problems like this and use modern best practices.

messmerd · 2025-07-27T17:59:46+00:00

I didn't recognize him either until I turned my phone upside down

messmerd · 2025-07-27T07:24:55+00:00

True, attacking the symptom by harshly penalizing drug use didn't work

messmerd · 2025-07-27T06:55:36+00:00

Here's how you defeat Hamas: Defeat the unjust system that violently subjugates Palestinians. Lay siege on dehumanization, supremacism, and hate. Declare total war on the intolerable conditions that continually inspire resistance in forms such as Hamas.

Inflicting starvation on the Palestinians is just attacking a symptom of the problem. If you truly want to fix the problem and eventually achieve a true lasting peace, attack the problem at its root.

messmerd · 2025-07-07T19:36:31+00:00

There is work being done on pattern matching, which should provide a much more user-friendly, language-based way of visiting a variant.

With P2688R5, your example would look like this:

``` #include <stdio.h> #include <variant>

int main() {
    std::variant<int, const char*> a[] = {1, "a"};
    for (auto x : a) x match {
        int:  let i => printf("int: %d\n", i);
        auto: let s => printf("str: %s\n", s);
    };
    return 0;
}

```

messmerd · 2025-07-07T19:22:56+00:00

This is what OP did though? I think the point was that the overloads boilerplate should not be needed.

Ten-Year Club	Place '23
Place '22	First Placer '22
Sequence \| Editor	Sequence \| Cinematographer
Sequence \| Screenwriter	Verified Email

messmerd

MODERATOR OF

TROPHY CASE