ref: d18c7f36b75feda3a11e54b00be8b131ea5caea2
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
dst = slgrow(dst, len + src.len)
slcp(dst[len:], src)
-> dst
}