> C23 gave us [[cleanup]] attributes

C23 didn't introduce it, it's still a GCC extension that needs to be spelled as [[gnu::cleanup()]] https://godbolt.org/z/Gsz9hs7TE

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cassepipe 5 hours ago | parent [-]

It 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 ?

	▲	ksherlock 5 hours ago \| parent \| next [-]
		[[ ]] 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...
	▲	SAI_Peregrinus 5 hours ago \| parent \| prev \| next [-]
		The `[[attribute]]` syntax is new, the builtin ones in C23 are `[[deprecated]]`, `[[fallthrough]]`, `[[maybe_unused]]`, `[[nodiscard]]`, `[[noreturn]]`, `[[reproducible]]`, and `[[unsequenced]]`.
	▲	kccqzy 4 hours ago \| parent \| prev [-]
		The feature itself is probably still __attribute__((cleanup(f))). That’s documented at https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attribute...