`\x1b（B`做什么？

Question

我是一个Blessed用户，最近，当我试图找出term.bold()函数的内容时，我得到了以下输出： \x1b[1m\x1b(B\x1b[m

我知道\x1b[1m和{}做什么，但是{}做什么呢？我试着把它打印出来，但好像什么也没用。在

提前谢谢！在

Answer 1

控制序列\x1b(B选择默认字符集ASCII。见XTerm Control Sequences：

ESC ( C   Designate G0 Character Set (ISO 2022, VT100).
          Final character C for designating 94-character sets.  In this
          list, 0 , A  and B  apply to VT100 and up, the remainder to
          VT220 and up.  The VT220 character sets, together with the
          Portuguese character set are activated by the National
          Replacement Character controls.  The A  is a special case,
          since it is also activated by the VT300-control for British
          Latin-1 separately from the National Replacement Character
          controls.
    ...
            C = B  -> United States (USASCII).

这是在终端被设置为其他字符集的情况下提供的，例如line-drawing。Blessed可能正在检索它作为{}的一部分，例如

^{pr2}$

进一步阅读：

• How do I get color with VT100?
• VT100.net