lib/std/slpush.myr


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

use "types"
use "alloc"

pkg std =
	generic slpush	: (sl : @a[:]#, elt : @a -> @a[:])
;;

generic slpush = {sl, elt
	/*
	slpush relies on implementation details
	of slgrow for efficiency. Because bucket
	sizes come in powers of two for all buckets
	<= 32k, and we only reallocate when we hit
	a bucket boundary, this is effectively
	growing the slice by powers of two.
	*/
	slgrow(sl, sl#.len + 1)
	sl#[sl#.len - 1] = elt
	-> sl#
}