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It's not a mistake to ban goto... it's not a mistake to keep it...It's not a mistake to ban goto... it's not a mistake to keep it...Posted Feb 10, 2008 11:57 UTC (Sun) by filipjoelsson (subscriber, #2622)In reply to: It's not a mistake to ban goto... it's not a mistake to keep it... by khim Parent article: Interview: Mark "Markey" Kretschmann (Not the Gentoo Weekly News)
The last time I saw goto in serious use (where last is defined as most recent instance of coding - not last time I viewed ancient code), was in some DirectX example code (shipped with DirectX in ca 1999 - so it is a half way ancient, and it is MS being responsible). Anyway, the way they used it was to skip to a dtor-like section of a function. Not particularly elegant, not particularly object oriented, but not outright heresy either - which, since I thought it _was_ outright heresy confused me. Ever since, I have been trying to solve it in more elegant ways (using C++). Nested ifs, functors, exceptions, you name it - it's not very elegant either. Anybody know a better way to free resources in a C++ function when failing? (I tend to think the nested ifs are the least evil - but they do eat the line width at an alarming rate.) EORant ;)
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It's not a mistake to ban goto... it's not a mistake to keep it... Posted Feb 10, 2008 13:48 UTC (Sun) by nix (subscriber, #2304) [Link] The Linux kernel uses goto in this manner all the time. It's useful if you can't do it by splitting the non-ctor-dtor stuff into a separate function.
freeing resources Posted Feb 11, 2008 3:26 UTC (Mon) by pflugstad (subscriber, #224) [Link] Are you looking for RAII?I use it quite often for things like mutexes, but it can be used in many other situations - any time you hold a resource in a function that must be cleaned up when the function exits, including when throwing an exception. It's a fairly common design pattern for C++ these days - I think I started seeing it a year or two ago...
freeing resources Posted Feb 11, 2008 8:19 UTC (Mon) by nix (subscriber, #2304) [Link] In C++ it's probably two decades old: I know it was landing in published textbooks ten years ago. I didn't see it in C outside the Linux kernel before about 2004.
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