goto statement [moved]
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RomTibi wrote:
Is it wrong to use goto into a program? Why?
Never use
gotostatements if the language of your choice has higher level conditional constructs, such as "if" statements. The only time I would ever condone the use of a "goto" (or its equivalent) is if you're writing in IL. Even then, I still wouldn't recommend using the OpCodes.Br instruction :PPhilip Laureano wrote:
I still wouldn't recommend using the OpCodes.Br instruction
I haven't seen a Visual Studio generated method yet without a silly BR.S inside; even in a Release build they typically end on something like:
IL_0013: /* 0B | */ stloc.1
IL_0014: /* 2B | 00 */ br.s IL_0016
IL_0016: /* 07 | */ ldloc.1
IL_0017: /* 2A | */ ret:)
Luc Pattyn [Forum Guidelines] [My Articles]
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Philip Laureano wrote:
I still wouldn't recommend using the OpCodes.Br instruction
I haven't seen a Visual Studio generated method yet without a silly BR.S inside; even in a Release build they typically end on something like:
IL_0013: /* 0B | */ stloc.1
IL_0014: /* 2B | 00 */ br.s IL_0016
IL_0016: /* 07 | */ ldloc.1
IL_0017: /* 2A | */ ret:)
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips: - before you ask a question here, search CodeProject, then Google - the quality and detail of your question reflects on the effectiveness of the help you are likely to get - use PRE tags to preserve formatting when showing multi-line code snippets
I have written an experimental IL optimizer, your code would result it:
IL_0013: ret
:) It's main purpose is to inline LINQ methods and then optimize away the overhead of the delegate/anonymous method; but that's not finished yet. Unfortunately, I don't have the time to continue working on the optimizer, and the current version has some optimization bugs that can introduce subtle bugs in the optimized code.
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I have written an experimental IL optimizer, your code would result it:
IL_0013: ret
:) It's main purpose is to inline LINQ methods and then optimize away the overhead of the delegate/anonymous method; but that's not finished yet. Unfortunately, I don't have the time to continue working on the optimizer, and the current version has some optimization bugs that can introduce subtle bugs in the optimized code.
Hi Daniel, an optimizer would be great to have built-in to Visual Studio's compilers I guess. I just recently started looking at MSIL code and I was not much impressed so far. Would Microsoft keep back on optimizing it because they rely on the JIT to optimize at its level anyway? BTW: can you tell me an easy way to look at native code, as generated by the JIT, on a program, say running from inside Visual Studio? Regards,
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips: - before you ask a question here, search CodeProject, then Google - the quality and detail of your question reflects on the effectiveness of the help you are likely to get - use PRE tags to preserve formatting when showing multi-line code snippets
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Is it wrong to use goto into a program? Why? When?:)
36. When you surround an army, leave an outlet free. ... Do not press a desperate foe too hard. SUN-TZU - Art of War
Moved by Admin on Saturday, December 08, 2007 6:11:58 PM. This is not a programming question. This is a programming discussion
Goto is normally discouraged because it violates a good program (control) flow and makes debugging/troubleshooting a bit difficult and sometimes a nightmare.
Vasudevan Deepak Kumar Personal Homepage
Tech Gossips
A pessimist sees only the dark side of the clouds, and mopes; a philosopher sees both sides, and shrugs; an optimist doesn't see the clouds at all - he's walking on them. --Leonard Louis Levinson -
:-D:laugh::-D
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
see using goto makes your program less structured and makes use of no logic...it must be avoided
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see using goto makes your program less structured and makes use of no logic...it must be avoided
Member 4691687 wrote:
using goto makes your program less structured
Maybe. But it really helps to rollback in particular circumstances.
Member 4691687 wrote:
nd makes use of no logic...
Nope. Program logic heavily relies to developer's one. :-D
Member 4691687 wrote:
it must be avoided
I don't like design dogmas. :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
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Yes, but not as wrong as asking a programming question in a non-programming forum.
How about if I try to help him out with this code sample I came across from someone who was apparently trying to avoid using a goto? I don't have access to the actual function anymore, but the basic idea went:
do { //some code here if ([condition]) break; //some more code here if ([condition]) break; //this goes on for awhile.... if ([condition]) break; // ... } while (false); // clean up code -
Is it wrong to use goto into a program? Why? When?:)
36. When you surround an army, leave an outlet free. ... Do not press a desperate foe too hard. SUN-TZU - Art of War
Moved by Admin on Saturday, December 08, 2007 6:11:58 PM. This is not a programming question. This is a programming discussion
In the first programming course I had, the textbook described GOTO as "evil"! EEEEeeeEEEviiiil! :mad: If you used GOTO, GOSUB or global variables, you flunked. That was made clear from the beginning. If you used the three "G"'s, you had not understod functions and you failed the course. I have never used the three "G" ever since. I think it makes the code hard to read. I so hate spagetti code. A function has some input and generate some output. Very simple. No globals comming down from heaven above. Put them in the function parameters. If there are many parameters, just organize them in a struct. If there are lots of data (like a picture) make a pointer and call-by-reference. The only exeption is const Pi=3.14. That may be global, but only in the math module.
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In fact, I use it outside the programs: "Goto hell!" is one of my favourite expressions. Am I wrong? :-D
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
A thorough software professional is one who when his wife yells at him "goto hell", worries more about the goto. Get more here.[^] :laugh:
Luc Pattyn [Forum Guidelines] [My Articles]
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A thorough software professional is one who when his wife yells at him "goto hell", worries more about the goto. Get more here.[^] :laugh:
Luc Pattyn [Forum Guidelines] [My Articles]
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Luc Pattyn wrote:
A thorough software professional is one who when his wife yells at him "goto hell", worries more about the goto.
:-D :laugh: :-D Thank you so much :-D again
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.