
  Command Language <a class="group-link" href="chap-cmd-lang.html">cmd-lang</a>


  [YSH Simple]    typed-arg     json write (x)
                  lazy-expr-arg assert [42 === x]
                  block-arg     cd /tmp { echo $PWD }; cd /tmp (; ; blockexpr)
  [YSH Cond]      ysh-case      case (x) { *.py { echo 'python' } }
                  ysh-if        if (x > 0) { echo }
  [YSH Iter]      ysh-for       for i, item in (mylist) { echo }
                  ysh-while     while (x > 0) { echo }
