c# - 正则表达式匹配所有特定的重复单词

Question

我有一个像这样的字符串:

SELECT * FROM blah WHERE ID IN ('<replaced>', '<replaced>', '<replaced>')

其中“<replaced> ”部分是一个字符串，我想匹配 ( 之间的所有内容和 )所以我可以将其替换为“<replacedlist>”。

结果字符串将是

SELECT * FROM blah WHERE ID IN (<replacedList>)

我不想只在括号内做所有事情，因为这将匹配其他字符串，只有当括号包含“<replaced>”并且重复任意次数时。

如果相关，我将使用 C# 来解析它，但我不会标记它，因为这应该是通用正则表达式。

Answer 1

你可以使用这个模式:

(?<=\([^)]*)'<replaced>'(, '<replaced>')*(?=[^)]*\))

如在

var input = "SELECT * FROM blah WHERE ID IN ('<replaced>', '<replaced>', '<replaced>')";
var pattern = @"(?<=\([^)]*)'<replaced>'(, '<replaced>')*(?=[^)]*\))";
var output = Regex.Replace(input, pattern, "<replacedList>");

Console.WriteLine(output); // SELECT * FROM blah WHERE ID IN (<replacedList>)

或者，您可以使用这种模式:

(\([^)]*?)(<replaced>(?:, <replaced>)*)([^)]*\))

如:

var input = "SELECT * FROM blah WHERE ID IN ('<replaced>', '<replaced>', '<replaced>')";
var pattern = @"(\([^)]*?)('<replaced>'(?:, '<replaced>')*)([^)]*\))";
var output = Regex.Replace(input, pattern, "$1<replacedList>$3");

Console.WriteLine(output); // SELECT * FROM blah WHERE ID IN (<replacedList>)