Viewing profile — AaronBallman

I could imagine misguided readings of some coding standard advice that would lead to that interpretation, but it's still not an interpretation that makes sense to me. Implementatio…

Ah! No, those just predate my joining the committee and haven't really come up since they were presented. Basically, every paper that gets submitted by an author will get some amou…

I don't think it's a myth so much as a misunderstanding of terminology. If an implementation defines some undefined behavior from the standard, it stops being undefined behavior at…

I think this is correct, assuming that locale is supported by the implementation and wchar_t is wide enough, but I am by no means an expert on character encodings.

> 1. Will the Apple's Blocks extension, which allows creation of Closures and Lambda functions, be included in C2X? We haven't seen a proposal to add them to C2x, yet. However, the…

I must be remembering incorrectly then, thank you!

If that macro is defined, then wchar_t is able to represent every character from the Unicode required character set with the same value as the short code for that character. Which …

I don't think the book covers strict aliasing, at least not in detail.

Not off the top of my head, but as an example along similar lines, when talking about whether we could realistically specify twos complement integer representations for C2x, we had…

When the committee considers proposals, we do consider the implementation burden of the proposal as part of the feature. If parts of the proposal would be an undue burden for an im…

Not really -- vendors are free to ignore newer releases of the standard that do not meet their customers needs and the committee can't do much about it. However, as a user, you can…

You couldn't in that parameter order. However, you could do this: int f(size_t n, int a[n][n]) { return a[n-1][n-1]; } ( https://godbolt.org/z/DV9c-C ) Btw, that definition was obs…

If you're interested in the final TR, I would imagine we'd list it on that page you linked. If you're interested in following the drafts before it becomes published, you'd fine the…

> Alternatively, please keep it going for a few hours if you would be able to be so generous with your time! We're remaining active while there are still people asking questions, s…

I'd ask them if they really meant "impossible" or just "harder than I wish it was". I've typically found that the tradeoffs between security, performance, and implementation effort…

The MISRA committee is a separate organization from the C standards committee, but there is overlap between the two groups and an official liaison process for the committees to col…

I'd put it this way -- as someone who writes both C and C++ and has for a long while, I find that the difference between "best practice" C89 and C17 code is not as wide as the diff…

There's not an official collaboration between the committee and the kernel developers (that I'm aware of), but we do have people on the committee who need to support Linux kernel d…

The usual argument is: once you've verified some piece of code is correct, changing it (even when there should be no functional change in the semantics) carries risk. Some customer…

I think that may be inaccurate -- IIRC, in C, you can do type punning via a union but not memcpy, and in C++ you can do type punning via memcpy but not a union and this incompatibi…

We've started doing some things in this area, but I don't think the committee would abandon legacy code bases entirely. Instead, we try to make a migration path for code bases. For…

> In general, how is one supposed to approach wg14 with ideas or need for clarification on the standard's wording / interpretation? I'm currently working on an update to the commit…

> Does the committee have any plans to document the rationale for each kind of Undefined Behavior? In the C99 timeframe, we had a rationale document that was separately maintained.…