alt Hacker NewsIt is surprisingly hard to find information about it, do you have any ? From what I can guess it's a new syntax but it's the feature itself is still an extension ?
Replies
SAI_Peregrinus • yesterday at 2:31 PM
The `[[attribute]]` syntax is new, the builtin ones in C23 are `[[deprecated]]`, `[[fallthrough]]`, `[[maybe_unused]]`, `[[nodiscard]]`, `[[noreturn]]`, `[[reproducible]]`, and `[[unsequenced]]`.
kccqzy • yesterday at 3:47 PM
The feature itself is probably still __attribute__((cleanup(f))). That’s documented at https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attribute...
[[ ]] attributes were added in C++11 and later C23. There are 7 standard(C32) attributes but GCC has hundreds of them.
https://en.cppreference.com/w/c/language/attributes.html
https://en.cppreference.com/w/cpp/language/attributes.html
https://gcc.gnu.org/onlinedocs/gcc/Attributes.html
https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attribute...