lisp - Racket 中的管道字符有什么作用？

Question

读者以一种特殊的方式解释|，但是我找不到关于它的任何文档。有谁知道这个符号对 Racket 意味着什么？

Answer 1

查看 Racket 语法:

http://docs.racket-lang.org/reference/reader.html

| starts a subsequence of characters to be included verbatim in the delimited sequence (i.e., they are never treated as delimiters, and they are not case-folded when case-insensitivity is enabled); the subsequence is terminated by another |, and neither the initial nor terminating | is part of the subsequence.

例如 1.3.2 阅读符号。