Hi,
I know I know its notoriously bad! I don't want to use it. I was wondering,
does it still exist? If it does, I really don't understand how!? like what
happens if you just goto halfway through a function (no objects properly
constructed!) , or a constructor itself??
Just intrigued!!
Mike
36  6767 
* Michael:
I know I know its notoriously bad! I don't want to use it. I was wondering,
does it still exist?
Yes.
If it does, I really don't understand how!?
Like always.
like what
happens if you just goto halfway through a function (no objects properly
constructed!) ,
That is forbidden by §6.6.4/3; it won't or shouldn't compile.
or a constructor itself??
?
Just intrigued!!
As you learn more you'll find many more unsafe constructs, in all languages.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
Michael wrote: I know I know its notoriously bad!
Long functions are bad. Short ones have no reason to use 'goto', and thus
'goto' is relatively harmless.
I don't want to use it. I was wondering,
does it still exist? If it does, I really don't understand how!? like what
happens if you just goto halfway through a function (no objects properly
constructed!) , or a constructor itself??
Ordinarily, one should not learn C++ laws via "but my compiler likes it".
In this case, a little VC++ experiment is useful:
goto bar;
string foo;
bar:;
error C2362: initialization of 'foo' is skipped by 'goto bar'
The language designers took care of it. With no legacy C constructors to
support, they ordained compilers reject (relatively) non-structured 'goto'
abuses.
--
Phlip http://industrialxp.org/community/bi...UserInterfaces
"Alf P. Steinbach" <al***@start.no > wrote in message
news:42******** ********@news.i ndividual.net.. . * Michael:
I know I know its notoriously bad! I don't want to use it. I was
wondering, does it still exist?
Yes.
If it does, I really don't understand how!?
Like always.
like what
happens if you just goto halfway through a function (no objects properly
constructed!) ,
That is forbidden by §6.6.4/3; it won't or shouldn't compile.
so what are the limits on what you can 'goto' 'to' ?
local scope?
or a constructor itself??
?
Just intrigued!!
As you learn more you'll find many more unsafe constructs, in all
languages.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
* Michael:
* Alf P. Steinbach: * Michael:
I know I know its notoriously bad! I don't want to use it. I was
wondering, does it still exist?
Yes.
If it does, I really don't understand how!?
Like always.
like what
happens if you just goto halfway through a function (no objects properly
constructed!) ,
That is forbidden by §6.6.4/3; it won't or shouldn't compile.
so what are the limits on what you can 'goto' 'to' ?
local scope?
Quoting the standard: "It is possible to transfer into a block, but not in a
way that bypasses declarations with initialization. "
Btw., don't quote things you don't reply to or irrelevant to your reply;
snipped further quoting.
Download and install <url: http://home.in.tum.de/~jain/software/oe-quotefix/>.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
"Michael" <sl***********@ hotmail.com> wrote in
news:d1******** **@sparta.btint ernet.com: Hi,
I know I know its notoriously bad! I don't want to use it. I was
wondering, does it still exist? If it does, I really don't understand
how!? like what happens if you just goto halfway through a function
(no objects properly constructed!) , or a constructor itself??
Just intrigued!!
Yes goto still exists.
The type of goto you describe is ill-formed. See section 6.7(3) of the
Holy Standard :)
Michael wrote: Hi,
I know I know its notoriously bad! I don't want to use it. I was wondering,
does it still exist? If it does, I really don't understand how!?
Yes it exists. Assume by "how" you mean "why". goto is extensively used
in machine-produced efficient C++ code.
--
Ioannis Vranos http://www23.brinkster.com/noicys
Ioannis Vranos wrote: Yes it exists. Assume by "how" you mean "why". goto is extensively used
in machine-produced efficient C++ code.
Please note Ioannis did not say "goto is efficient". It might be more
efficient than a well-structured function call; it might not.
Under the theory that a function takes time pushing variables onto a stack,
'goto' might generate a single branch opcode. However, that 'goto' might
live in a function that's now long enough to overflow the CPU cache. Several
small functions might have fit in the cache, making their specific function
calls faster.
--
Phlip http://industrialxp.org/community/bi...UserInterfaces
On Thu, 24 Mar 2005 23:53:37 +0000 (UTC), "Michael"
<sl***********@ hotmail.com> wrote: I know I know its notoriously bad! I don't want to use it.
Why not? Goto is very useful since there is not labelled break. When
you have nested for in another for /for example/ the easiest way /and
elegant too/ to break from the external one is to use goto.
have a nice day
bye
--
Maciej "MACiAS" Pilichowski http://bantu.fm.interia.pl/
M A R G O T --> http://www.margot.cad.pl/
automatyczny t³umacz (wczesna wersja rozwojowa) angielsko-polski
Maciej Pilichowski wrote: Michael wrote:
I know I know its notoriously bad! I don't want to use it.
Why not? Goto is very useful since there is not labelled break. When
you have nested for in another for /for example/ the easiest way /and
elegant too/ to break from the external one is to use goto.
or return.
Why is your function so long?
--
Phlip http://industrialxp.org/community/bi...UserInterfaces This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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--
http://www.kashmiri-pandit.org/atrocities/index.html
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