struct group_info init_groups = { .usage = ATOMIC_INIT(2) }; Is this legal ANSI ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		statictype on April 25, 2011 \| parent \| context \| favorite \| on: Show HN: Hacker Typer [joke] `struct group_info init_groups = { .usage = ATOMIC_INIT(2) };` Is this legal ANSI C? You can initialize structs using .field = value ? Or is something else going on here?

ramchip on April 25, 2011 | [–]

Yes, it's C99.

http://publib.boulder.ibm.com/infocenter/lnxpcomp/v8v101/top...

duiker101 on April 25, 2011 | | [–]

http://lxr.free-electrons.com/source/kernel/groups.c

this should be the file i used. seems correct that way.

teraflop on April 25, 2011 | | [–]

If by ANSI C you mean C89, then no. It was added in C99. I believe the feature is technically known as a "designated initializer".

(http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf section 6.7.8)

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact