ref: c1785ddd18f21259671a5d8347a5b39ab151b1f4
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# }