Question

我正在构建的应用程序的一部分允许您在交互式终端中评估bash命令。在输入时，运行该命令。我试图让它更灵活，并允许命令跨越多行。

我已经检查了一个尾随反斜杠，现在我正试图弄清楚如何判断是否有一个打开的字符串。我没有成功为此编写正则表达式，因为它也应该支持转义引号。

例如：

echo "this is a 
\"very\" cool quote"

Answer 1

如果你想要一个匹配字符串（subject）的正则表达式，只要它不包含不平衡（未转义）引号，那么请尝试以下方法：

/^(?:[^"\\]|\\.|"(?:\\.|[^"\\])*")*$/.test(subject)

<强>解释

^          # Match the start of the string.
(?:        # Match either...
 [^"\\]    #  a character besides quotes or backslash
|          # or
 \\.       #  any escaped character
|          # or
 "         #  a closed string, i. e. one that starts with a quote,
 (?:       #  followed by either
  \\.      #   an escaped character
 |         #  or
  [^"\\]   #   any other character except quote or backslash
 )*        #  any number of times,
 "         #  and a closing quote.
)*         # Repeat as often as needed.
$          # Match the end of the string.

检查给定字符串中的未打开的未加引号的引号

1 个答案: