#rvalues

[intercal]

anyway I finally understand C fanboys now, you can just ... read it. Unlike C++

[stellrrinsulation]

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— Stellrr Insulation (@stellrrinsulate) Mar 1, 2023

from Twitter https://twitter.com/stellrrinsulate

[u-train]

look you say that as a meme but...

templates are turning complete (lol)

templates are actually fill-in-the blank code. so, you cannot just have a typical .hpp and .cpp structure. because you know, the .hpp would only define the interface (control panel) but not the implementation (guts). you have to manually instantiate the implementation for the template otherwise linking errors. can you tell that I got bit by this and I'm bitter???

sfinae (if the first template didn't work try a different one. this is like having half-, one-, two-, and three-gallon containers. you have three gallons to store. you literally try filling each of them until you get the last container. lol!)

anonymous namespace

inline namespace?!

const-ing the this parameter of a method is just weird syntax to me.

forwarding references? wtf is this shit?

coroutines, what does this mean in cpp and why does cpp have this?

concepts (I just don't know, I think they're type classes but funky)

the most vexing parse (skill issue)

vector>> (X_X)

you can use macros to change true to false. or.. any keyword. lol.

operator overloading to make things that shouldn't be. ostream pipe for example...

static

varargs are silly imo

pointer-to-member operators. JUST LEARNED THIS!

rule of five (so silly)

PIMPL (okay buddy)

basic datatype are relatively sized and only specify minimal sizes.

at least we have cstdint (and some others?)

rvalues/lvalues, which aren't really right/left values.

move semantics, I think it makes sense, just not immediately intuitive.

and im so sure, this is just start. cpp have so many features that work together to make insane things possible!

that cat has every right to be like that. this meme is real.

[bencplu]

読書メモ「c++初心者からの脱出」1

グローバル関数とメンバ関数

非公開メンバ変数にアクセスしなければメンバ関数にする必要はない

むやみやたらにオーバーロードしない

別名関数でよければそうする

const関数とは？

const関数は

void func() const｛処理｝

というように

メンバ関数名の後にconst関数を付加する。

const関数は、関数内でメンバ変数の値を変更できない

const lvalue参照とrvalue参照

まだよく理解できておらず…次回

[arahovsepyan]

View this post on Instagram

A post shared by Ara Hovsepyan, Architect (@arahovsepyan)

spit some bars about R-Values and U-Values... hit the link for the full vid! _________________________________ #rvalues #uvalues #architecture #architect #mnemonicdevice #architectrapper #architecturerap #thearchitectsmixtape #superarchitects #archinect #architectregistrationexam #ncarb #notly #ppd #pdd #buildingscience #buildingsciencefightclub #buildingscience101 #buildingsystems #energycalcs #title24 https://www.instagram.com/p/CCYsR1tpX79/?igshid=194ytoh2fjfvq

[jimsjoo]

error: lvalue required as increment

error: lvalue required as increment

What will be the value of x in the following C++ program? #include<iostream> using namespace std; int main(){ int aaa=1; int xxx=(aaa++)++; cout<< xxx <<endl; return 0; } The variable 'aaa' has 1 at first. When declared as an integer variable, xxx seems to have 3 because we are likely to assume that (aaa++) increases 'aaa' by 1 to make it 2 and '++' after (aaa++) makes the result of (aaa++)…

[intercal]

I'm gonna teach my kids what an rvalue reference is so they won't have the same struggles as me

[stellrrinsulation]

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— Stellrr Insulation (@stellrrinsulate) Apr 14, 2023

from Twitter https://twitter.com/stellrrinsulate

[sidnazpro2020]

Latest News Today - India Coronavirus Cases: India's 'R-Value' Inching Up,

Latest News Today – India Coronavirus Cases: India’s ‘R-Value’ Inching Up,

India has logged over 3.16 crore cases since the start of the pandemic. New Delhi: India’s ‘R-Value’ is inching up, and it’s a cause of concern, AIIMS Chief Dr Randeep Guleria told NDTV on Saturday, stressing on the need of aggressive containment strategies in the parts of the country that are witnessing a surge in fresh Covid infections. His remarks come amid concern over a third…

[stuccoeverest]

Rooftop Stairwell Project Completed. ✅Flashing, Caulking and EIFS was done by us. Pleasure to work with QuadReal on this project.🏗🏢 #eifs #stucco #quadreal #propertymanagement #flashing #caulking #retrofit #renovation #exteriordesign #exterior #construction #architecture #generalcontractor #airbarrier #insulation #capflashing #rvalue (at Mississauga, Ontario) https://www.instagram.com/p/CMAM7bZDBSZ/?igshid=4aytns9dkxeo

[zebrablinds-ca]

New Post has been published on https://www.zebrablinds.ca/blog/how-to-get-the-best-r-value-for-your-windows-10-2020-44/

How to Get the Best R-Value for Your Windows

[insightfultechie]

Using RValue Reference and Move constructor in C++ . The '&&' syntax of C++11

[jtleepp]

lvalues and rvalues

The topic that inspired me to create this page, lvalues and rvalues. These rs and ls stand for left and right, referring to the side of in an assignment that value would be expected to occur.

A lvalue is a variable. You would expect this to live in the heap or stack, and it's address should be viewable with the reference of unary operator (&).

On the other hand (side of the expression), a rvalue is easiest to think of as a literal. They do not have a memory address that can be stored. Literals are the example of this I gave, but return values of functions also fit this category. So I guess that means they live in the stack or text? Seems odd to me.

Anyway, the real question is why are these useful. And it's because you can overload functions to handle these cases separately. probably other reasons as well. If you are writing a sorting function that doesn't want to modify the array passed to it, but you could increase efficiency if you did, you know with a rvalue you can modify the array in-place. Neat.

Now the function that sent me down this rabbit hole, std::move. Gotta go figure out what it does.

[intercal]

I think I am going to abandon C++ for writing this language. it was a nice idea, and maybe I bit off more than I could chew, but I don't think it's what I want to be using. often I will find myself getting annoyed-the-hell-out-of while I'm writing it, and this is supposed to be a fun project. it was not a big, specific thing that caused me to drop the language, but a combination of a lot of small things:

no lifetime tracking, which I can't really complain about because that's the language. but it's still very annoying having to worry about getting a reference to something, releasing that reference, and then taking it again in case its position in memory had changed.

implicit integer narrowing was probably what caused me to stop. say you have a 16 bit integer, and you accidentally try to shove it into an 8 bit argument (which I was starting to run into). it will happily chop off the top 8 bits and compile your program without telling you.

incomplete implementations of the current standard. C++23 was finalized last year, but gcc and ESPECIALLY clang (holy fuck they are so behind) have huge chunks missing.

the standard library feels really incomplete and not integrated with the rest of the language with its newest features. I was originally going to use std::u8string everywhere just to show that I plan on using utf-8 strings everywhere, but passing a u8string into anything doesn't seem to have much support in the standard library functions, probably because it's so new. so why would anyone want to use it if it has zero support within the library it's defined in?

no native utf-8 support. I can live with this, but man it would be nice not having to pull a new library in for it.

having to think about lvalues, rvalues, glvalues, and so forth. I finally get why it's important in a language like this, but I would prefer to just ... not. lol

so yeah. I think I am going to shoot for using Rust. I hope I do not rue the day. it has its own annoying shit with pointers and memory but I hope that I can just ignore that for a while, considering I was going to ignore it for a while in C++. I'm a lot more familiar with Rust too and its pitfalls. my main worry is that I have had multiple projects completely stopped in their tracks because I made an incorrect assumption and it completely ruined my design. hopefully this won't happen since I'm just porting stuff over, but we will see.

[stellrrinsulation]

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Adding attic insulation is a waste of money! Here is how to fix it right! https://t.co/XRhN1fQUGD #atticinsulation #sprayfoam #insulationremoval #cellulose #fiberglass #stellrr #sprayfoaminsulation #Austin #rvalue #insulationcontractor #insulationvacuum #atticinsulationaustin

— Stellrr Insulation (@stellrrinsulate) Apr 5, 2023

from Twitter https://twitter.com/stellrrinsulate

[sidnazpro2020]

Latest News Today - India Reports Most New Covid Cases In 3 Weeks As R-Value

Latest News Today – India Reports Most New Covid Cases In 3 Weeks As R-Value

More than 45.55 crore vaccine doses have been administered in the country so far. New Delhi: India’s Covid graph continued to show an upward trend as the country reported 44,230 new cases on Friday, the most in three weeks, amid fears of another wave of infections. The spread of the disease – which had eased off after a peak of four lakh daily cases in May – has forced at least one state to lock…