standards Questions
1
As pointed out in answers to Generic hash for tuples in unordered_map / unordered_set and elsewhere, Boost has an implementation of boost::hash<tuple<string, string>>.
So, we can do thi...
3
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In C++20, there are two swap function templates: std::ranges::swap(T&&, U&&) and std::swap(T&, T&).
I just wonder:
What's the difference between they two?
Markson asked 25/7, 2021 at 7:42
2
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The expresssion (void *)0 is called a null pointer.
But how about the following:
int i = 0;
void *s = (void *)i;
Is s also a null-pointer? The C-language standard says:
6.3.2.3 Pointers
3 An inte...
Ordain asked 6/6 at 4:9
2
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A while ago, I had noticed that when encoding a map name: value to 'application/x-www-form-urlencoded, it renders something like that (here I use Python):
>>> from urllib import urlencode...
1
I'm very used to cross-browser web APIs having a specification document owned by a standards body, e.g. the WebRTC spec from the W3C, or the WebGL spec from Khronos.
Another web API is "Source...
Inducement asked 28/9, 2020 at 13:17
5
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I thought those terms where synonymous, but a note in MISRA regarding dead code indicates this to be wrong? What's the difference? Is one a subset of the other?
Emmanuelemmeline asked 2/4, 2014 at 5:58
1
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For the old XML layouts I always use the dimen.xml file to define almost all dimensions, paddings, margins, etc.
While learning Jetpack Compose I find that all repositories, examples, etc., hardcod...
Depalma asked 2/5, 2023 at 16:12
1
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The cppref page on std::format says:
It is not an error to provide more arguments than the format string requires:
// OK, produces "Hello world!"
std::format("{} {}!", "H...
Buckeye asked 1/2 at 9:58
1
Most of the standard library seems reasonably simple to implement either in terms of other parts of the library, in terms of OS sys-calls, or bare C++ code. A few more bits (e.g. <atomic>) pr...
Anabiosis asked 22/1 at 18:59
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I'm wondering if the following date is ISO8601 compliant :
2012-03-02 14:57:05.456+0500
(for sure, 2012-03-02T14:57:05.456+0500 is compliant, but not that much human readable !)
IOW, is the T be...
Methodist asked 2/3, 2012 at 10:16
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I have a JSON file, which contains JSON from Clojure's data.json library. The data came from Twitter where people seem to smile a lot.
$ cat /tmp/myfile | jq .
I get:
parse error: Invalid \uXX...
3
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It is well known that in each of the C and C++ standards there were "blind spots" that did not describe certain cases in well-formed programs. It is obvious that in non-formal description...
Harim asked 16/9, 2023 at 14:58
1
Since patents expired in 2017, I wonder if there are specifications of the MP3 audio format that have been made available to the public?
Unfortunately, access to the official ISO/IEC 13818-3:1998 ...
Lewandowski asked 15/5, 2020 at 22:7
2
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I was doing some research on the Rust programming language, and I was trying to find an authoritative published standard (or at least a document that functions as if) like the ECMA Standard or the ...
Clayborn asked 17/1, 2014 at 3:43
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(My original question was going to be about "What happened to _BitInt?" but that was based on a misreading of some cppreference pages).
The Library Introduction section 16.2 of the C++23 ...
Nader asked 3/11, 2023 at 16:5
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What exactly is POSIX? I have read the Wikipedia article but I still don't understand.
Decay asked 23/11, 2009 at 0:42
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According to cppref:
std::allocator<T>::allocate_at_least
Allocates count * sizeof(T) bytes of uninitialized storage, where
count is an unspecified integer value not less than n, by calling
...
Glidewell asked 8/9, 2021 at 7:1
2
The LLVM C++ compiler has full support for C++11 standard. Is there a way to set C++11 as the default standard without adding -std=c++11 compiler flag every time? I tried setting CCXFLAGS environme...
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There is a very convenient feature introduced in C++11 called raw string literals, which are strings with no escape characters. And instead of writing this:
regex mask("\\t[0-9]+\\.[0-9]+\\t\\\\S...
Outfielder asked 29/9, 2013 at 8:34
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What is a good way to overcome the unfortunate fact that this code will not work as desired:
<div class="required">
<label>Name:</label>
<input type="text">
</div>
...
Prestige asked 25/6, 2012 at 21:33
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Since Go puts a heavy emphasis on interfaces, I'm wondering how can I explicitly state that a structure is implementing an interface for clarity and errors checking in case some method is missing? ...
Overplay asked 31/7, 2015 at 18:57
3
Regarding window.innerWidth and document.documentElement.clientWidth,
Webkit (Chrome / Safari) claims innerWidth is smaller than clientWidth.
Trident and Presto claim innerWidth is bigger than c...
Kannry asked 4/8, 2011 at 14:0
3
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I apologize if this is a duplication.
What column standardization would you use for storing international country subdivision data?
For example, if it was just US and Canada I believe all subdivi...
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How do you determine what version of the C++ standard is implemented by your compiler? As far as I know, below are the standards I've known:
C++03
C++98
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I know there is the perl regex that is sort of a minor de facto standard, but why hasn't anyone come up with a universal set of standard symbols, syntax and behaviors?
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