auto-close

if an exception thrown during the processing of the file, the file is still properly closed. This is not the case is several of your examples.

I don't quite know how they do it (probably destructor-like mechanisms[1]), but in some languages (or OS's), files and DB connections are automatically closed when the EXE or script ends. Thus, if we terminate the execution based on an error, those things are closed automatically.

Maybe languages and tools that you use behave differently. I only call the shots based on my experience. If I don't see something causing problems, I don't focus on looking for language techniques to manage problems that are not there. Something has been spoiling me perhaps......and I like it :-)

[1] Destructors are not limited to OO

Tablizer: I don't quite know how they do it (probably destructor-like mechanisms[1]), but in some languages (or OS's), files and DB connections are automatically closed when the EXE or script ends. Thus, if we terminate the execution based on an error, those things are closed automatically.

From your comments, it seems that you are not familiar with the behavior of exceptions. Exceptions (generally) don't terminate the program, so depending on the OS to do your cleanup is pointless. It would also explain why your examples ignored exception safety.

I suppose now we can enter a discussion on exceptions and if they are needed for custom biz apps and if they can provide a roughly 5% overall decrease in complexity.

Or not.

Our last conversation on closures broke down on understanding synchronization issues and I don't want to repeat that here with exceptions. So I'm willing to drop the issue.

Perhaps you need to modify your claim to include the phrase "they present a lame non-closure version that depends upon advanced programming techniques (such as exceptions) to compare to".

Post #107,786 by tablizer 6/29/03 1:03:49 PM Reply	auto-close if an exception thrown during the processing of the file, the file is still properly closed. This is not the case is several of your examples. I don't quite know how they do it (probably destructor-like mechanisms[1]), but in some languages (or OS's), files and DB connections are automatically closed when the EXE or script ends. Thus, if we terminate the execution based on an error, those things are closed automatically. Maybe languages and tools that you use behave differently. I only call the shots based on my experience. If I don't see something causing problems, I don't focus on looking for language techniques to manage problems that are not there. Something has been spoiling me perhaps......and I like it :-) [1] Destructors are not limited to OO ________________ oop.ismad.com
Post #107,791 by JimWeirich 6/29/03 3:37:50 PM Reply	Exceptions Tablizer: I don't quite know how they do it (probably destructor-like mechanisms[1]), but in some languages (or OS's), files and DB connections are automatically closed when the EXE or script ends. Thus, if we terminate the execution based on an error, those things are closed automatically. From your comments, it seems that you are not familiar with the behavior of exceptions. Exceptions (generally) don't terminate the program, so depending on the OS to do your cleanup is pointless. It would also explain why your examples ignored exception safety. I suppose now we can enter a discussion on exceptions and if they are needed for custom biz apps and if they can provide a roughly 5% overall decrease in complexity. Or not. Our last conversation on closures broke down on understanding synchronization issues and I don't want to repeat that here with exceptions. So I'm willing to drop the issue. Perhaps you need to modify your claim to include the phrase "they present a lame non-closure version that depends upon advanced programming techniques (such as exceptions) to compare to". -- -- Jim Weirich jweirich@one.net [link\|http://onestepback.org\|http://onestepback.org] --------------------------------------------------------------------- "Beware of bugs in the above code; I have only proved it correct, not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)
Post #107,803 by tablizer 6/29/03 10:03:31 PM Reply	Warning: Discussing exceptions with me is a loooong topic ________________ oop.ismad.com

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