linux - $'\n' 在 bash 中是什么意思？

Question

这个 stackoverflow 问题的答案 In a Linux shell how can I process each line of a multiline string?提到 $'\n' 是一种特殊语法“并非在每个 shell 中都可用”。

我想知道语法是什么意思？

谢谢。

Answer 1

请参阅 bash 手册页的 QUOTING 部分:

   Words of the form $'string' are treated specially.  The word  expands  to
   string,  with  backslash-escaped  characters replaced as specified by the
   ANSI C standard.  Backslash escape sequences, if present, are decoded  as
   follows:

...
              \n     new line
...

   The  expanded result is single-quoted, as if the dollar sign had not been
   present.

此语法不是标准 Unix Bourne shell 的一部分。它可能是 bash 特有的，尽管我没有四处查看其他 shell 是否支持它。