C++ expression(s)

C3D1

Today i found some really weird expression in some C++-code

if(++(k=j) != node.end())
{
if("something" == *k)
doSomething();
else if("something other" == *k)
doSomethingOther();
}

and just ~30 lines below that weird if statement i found this:

k = j;
if(++k != node.end())
{
if("something" == *k)
doSomething();
else if("something other" == *k)
doSomethingOther();
}

why always so weird? Why don' to it in an nice way

k = j + 1;
if(k != node.end())
{
if("something" == *k)
doSomething();
else if("something other" == *k)
doSomethingOther();
}

In some other code a few days ago i found this

n[idx++] = a[++idx2]++;

where both, a and n, are defined as void* What are the ugliest C++ expressions that have you seen in the last few weeks/months

megaadam

C3D1 wrote:

why always so weird?

Hmmm... isn't that a programming question ? :cool: [EDIT: Silly me! I thought we were in the Lounge ;P ] I think some people write such nasty stuff because it makes them feel smart. And maybe, a few of them think that it compiles into faster code :wtf:

Life is too shor

den2k88

The shorter the code the faster it gets... thrown out of the window along with the programmer :suss: I sometimes write artworks like that but in 5 minutes I expand them to the readable form. It's just better.

GCS d--- s-/++ a- C++++ U+++ P- L- E-- W++ N++ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t++ 5? X R++ tv-- b+ DI+++ D++ G e++>+++ h--- ++>+++ y+++* Weapons extension: ma- k++ F+2 X If you think 'goto' is evil, try writing an Assembly program without JMP. -- TNCaver "When you have eliminated the JavaScript, whatever remains must be an empty page." -- Mike Hankey

Indivara

My favourite is the --> "operator".

int counter = 10;
while (counter --> 0)
{
// do something
}

Some people consider it ugly.

den2k88

It's... wonderful. And weird.

GCS d--- s-/++ a- C++++ U+++ P- L- E-- W++ N++ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t++ 5? X R++ tv-- b+ DI+++ D++ G e++>+++ h--- ++>+++ y+++* Weapons extension: ma- k++ F+2 X If you think 'goto' is evil, try writing an Assembly program without JMP. -- TNCaver "When you have eliminated the JavaScript, whatever remains must be an empty page." -- Mike Hankey

Lost User

C3D1 wrote:

k = j + 1;

That is a mistake. k obviously is a pointer and ++k will not increment this pointer by just 1 byte. It will increment it by the size of the type of k. Try it out and examine the memory address k points to in the debugger in both versions.

The language is JavaScript. that of Mordor, which I will not utter here
This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a fucking golf cart.
"I don't know, extraterrestrial?" "You mean like from space?" "No, from Canada." If software development were a circus, we would all be the clowns.

k5054

CDP1802 wrote:

C3D1 wrote:

k = j + 1;

That is a mistake. k obviously is a pointer and ++k will not increment this pointer by just 1 byte. It will increment it by the size of the type of k. Try it out and examine the memory address k points to in the debugger in both versions.

I think you're mistaken. k gets assigned j + sizeof(*j), not j + sizeof(*k). Hopefully j and k are compatible pointer types. Edit: I'm not sure what k = j + 1 has to do with ++k. In any case, ++k does not increment by the size of the type of k, but rather by the size of the type k references.

Agent__007

Brilliant! I actually Googled to find whether that "operator" really exists in C++! :doh:

You have just been Sharapova'd.

Power Puff Boy

That's evil.

Kitty at my foot and I waAAAant to touch it...

PIEBALDconsult

Vile. Implementation-dependant. X|

Dan Neely

C3D1 wrote:

What are the ugliest C++ expressions that have you seen in the last few weeks/months

In no particular order[1]:

#include "stdafx.h"

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWndEx)

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWndEx)
//{{AFX_MSG_MAP(CMainFrame)

//}}AFX\_MSG\_MAP

ON\_COMMAND(ID\_HELP, OnHelp)

END_MESSAGE_MAP()

CMainFrame::CMainFrame()

[1] Oh who am I kidding, it's Friday and I'm just going down a file and pasting in the order found.

Did you ever see history portrayed as an old man with a wise brow and pulseless heart, waging all things in the balance of reason? Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful? --Zachris Topelius Training a telescope on one’s own belly button will only reveal lint. You like that? You go right on staring at it. I prefer looking at galaxies. -- Sarah Hoyt

C3D1

isn't that a C++ 11 feature? I'm currently using the VC6 compiler... There is no C++ 11 :java: ;P

C3D1

Oh my god... The MFC MESSAGE_MAP... How could i miss this rape on #define-macros and the whole C++ Language...