Reddit blog post discussing a problem. Commenter A: Can't you just do X? Commenter B:: No, because Y. Commenter A: But if you do X, then Z happens, so Y shouldn't be an issue. I didn't read the blog post. Commenter B: As the blog post explains, Z does not happen!

@vitaut Feels like -0°.

RE: https://fosstodon.org/@foonathan/115496833677765010 Thankfully not, after all.

Achievement unlocked: if consteval { if constexpr (foo) { if (bar) { throw error; } } }

when compiling C code, enable the -fPIE option to compile to Proto-Indo-European, for maximum compatibility with all CPU architectures developed on the Eurasian continent

From the standardization committee that brought you keywords such as `co_return`, `decltype`, and `reinterpret_cast`, now for your consideration: `trivially_relocatable_if_eligible` and `replacable_if_eligible`! C++ - you're gonna need a bigger column limit.

I'm hoping a cobus is enough like a bus in that it gets me to my destination.

As co-organizer of the C++ User Group #Aachen, I am thrilled to announce our program for next Wednesday, September 3, 2025. We will meet at SLB starting at 6:30 p.m., and the talks will begin at 7:00 p.m.. If possible, please pre-register at […] [Original post on nrw.social]

LLVM bitcode is not good designed if you want to generate it efficiently. For example, you need to define all types that a module is using without duplicates. This is easily done with a hash table and ideally you could use the binary serialization as key: Serialize into a buffer, do lookup in […]

Another day, another #if 0 ... #endif bisect to find the code that crashes MSVC.

Got tired of linking with LLVM so I've written something to emit bitcode directly. The blocks and records are conveniently defined in a little X macro file which then is used to stamp out a fully type safe builder API.

@vitaut I've got a good chuckle when I saw that I contributed to the "hello world foundation" https://algora.io/profile/foonathan

Enjoyed the talk by @foonathan at #wearedevelopers on how to do functional programming in C++ a lot I don't even use C++, but it was so well presented that I felt I still understood

Today I rebased my stuff after spending two weeks on conferences only to discover that we've introduced an `use_iter_move_on_xvalue_dereference_index` customization point.

Can anybody I know invite me to lobste.rs?

I've used the `*---*x` operator today.

I've tagged a new release of lexy, my C++ parser library. The last release was December 2022, so this was long overdue: https://github.com/foonathan/lexy #cpp #cplusplus

When you finish writing your parser

I love how fixing audio issues on various linux devices has become as simple as `pacman -S pipewire-pulse` or `pacman -S pipewire-alsa`.

Next week, I'm going to be attending C++Now, and I'm going to be giving my two favorite talks of all time: First, a repeat of my "Overenginering max(a, b)" talk, which is just a bunch of fun metaprogramming to solve a safety problem. Then, a new talk "Missing (and future?) range concepts" […]

I'm going to be speaking about missing and potentially future C++ range concepts at C++Now: https://schedule.cppnow.org/session/2025/missing-and-future-c-range-concepts/ #cpp #cplusplus

I've been programming in C for a small project, a couple of thoughts: * -Wimplicit-fallthrough isn't enabled by -Wall -Wextra in clang, which has bitten me. * I got tired of `Foo foo = (foo)x`, so I'm using C23 and auto, sorry, not sorry. * I spend a lot less time thinking about interface […]

I published my trip report about the Hagenberg meeting last week: https://www.think-cell.com/en/career/devblog/trip-report-winter-iso-cpp-meeting-in-hagenberg-austria It was pointed out to me that I was wrong about the potential for dangerous optimizations with contracts and ODR. It is in fact […]

I've written a trip report about last week's C++ committee meeting in Hagenberg, Austria https://www.think-cell.com/en/career/devblog/trip-report-winter-iso-cpp-meeting-in-hagenberg-austria #cpp #cplusplus

I will be giving a keynote about functional programming at @cpponline! https://cpponline.uk/keynote-spotlight-functional-programming-in-cpp/ #cpp #cplusplus

I'm going to be speaking at the C++ meetup in Helsinki on February 4th! Overengineering `max(a, b)`: Mixed Comparison Functions, Common References, and Rust's Lifetime Annotations https://www.meetup.com/cpphelsinki/events/305683323/?eventOrigin=group_upcoming_events #cpp #cplusplus

I will be giving a keynote about functional programming in C++ @ @cpponline: https://cpponline.uk/session/2025/functional-programming-in-cpp/ #cpp #cplusplus #functional

FYI: "advertisement for other languages" isn't a valid reason to report a post on r/cpp.

Current status: Wishing the C preprocessor had lambdas to pass to a PP_FOR_EACH macro. Reflection can't get here soon enough.

I've found a cool idiom for tagged unions of aggregates: Give each aggregate member a tag defaulted to the correct kind. That way, when you use designated initializers to construct the object, it will be automatically initialized correctly. https://godbolt.org/z/MYE91hGY6 #cpp #cplusplus

Go is a programming language with a strange property: The more I learn about it over the years, the less I like it.

Days since the last clang stack overflow due to high nesting of range adaptors: 0

Company Christmas party, CEO is giving a retrospective of the year: "We have gained X new customers, closed Y tickets, and reported 25 compiler bugs!" Shoutout to MSVC, couldn't do it without you.

"profiles are very easy to sell. They reassure people who don’t care about safety that they don’t have to, and they reassure everyone else that there is a path forward. And we can blame users or implementers when it ultimately fails to have a meaningful impact" […]

I've written a trip report about the recent ISO C++ committee meeting: https://www.think-cell.com/en/career/devblog/trip-report-fall-iso-cpp-meeting-in-wroclaw-poland #cpp #cplusplus

We've got a new copy editor at work and he's great: > I expected this rejection: LEWG, the group responsible for designing the standard library, is historically not really sympathetic to people who don't want to use the standard library, but I am still disappointed.{{#copy editor: That sucks […]