ref: 5c12b2816f7feeafb5e3e52ee287bf33927a1c74
dir: /lib/std/sljoin.myr/
use "alloc"
use "slcp"
pkg std =
generic sljoin : (dst : @a[:]#, src : @a[:] -> @a[:])
;;
generic sljoin = {dst, src
var len
len = dst#.len
slgrow(dst, len + src.len)
slcp(dst#[len:], src)
-> dst#
}