Re:A Defer Mechanism for C
by yvdriess on Monday December 14, 2020 @09:48AM
(#25418145)
guard/defer is semantically and syntactically as explicit (or implicit) as C's automatic storage class (https://en.cppreference.com/w/c/language/storage_duration), which is the default storage class.
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Only if you include dynamically sized arrays, which are deprecated because of their problematic allocation behaviour.
I don't believe that VLAs are actually deprecated as such, but have been moved to an "optional" feature for implementation in C11. There's a feature macro to check, __STDC_NO_VLA__, but I don't think the feature is actually disappearing from the standard any time soon.
I wonder what is a good use for VLAs btw. I used it for a string padding function to create the padding with a simple loop before a call to strjoin. Is that a bad idea or a legitimate use case?