On Wednesday 19 October 2011 14:05:50 Mike Frysinger wrote:
> now that we have "in_iuse" in eutils.eclass (with all the caveats), i'll be
> adding huse:
> 	huse() {
> 		in_iuse $1 || return 1
> 		use $1
> 	}

actually, after posting this, "iuse" is probably a better name.  "huse" came 
up because the code constructs i was using before was like:
	has foo ${IUSE} && use foo && .....
which collapses into:
	h[as foo ${IUSE} && ]use foo && ...
	huse foo && ...

so new proposal for those who love 1 liners:
	iuse() { in_iuse $1 && use $1 || return 1 ; }
-mike