如何用正则表达式过滤注释

怎么用正则表达式过滤注释？

RT。

例如：有一段代码：
  EMU0 : in bit; -- must be type in for compliance enable
  -- non-JTAG type is inout
  EMU1 : in bit; -- must be type in for compliance enable
  -- non-JTAG type is inout
  RSV0 : in bit;
怎样用正则把注释过滤掉，其他的输出。注释就是"--"符号后边的！
 

[解决办法]

C# code

            string pattern = @"(?is)(?:--).*?(?:\n)";            string replacement = "\n";            string input = @"EMU0 : in bit; -- must be type in for compliance enable  -- non-JTAG type is inout  EMU1 : in bit; -- must be type in for compliance enable  -- non-JTAG type is inout  RSV0 : in bit;";            input = Regex.Replace(input, pattern, replacement);            Console.WriteLine(input);/*EMU0 : in bit;   EMU1 : in bit;  RSV0 : in bit;*/
[解决办法]
不考虑包在""中的--的话，这样就可以了
C# code
string test = @"EMU0 : in bit; -- must be type in for compliance enable  -- non-JTAG type is inout  EMU1 : in bit; -- must be type in for compliance enable  -- non-JTAG type is inout  RSV0 : in bit;";Regex reg = new Regex(@"--.*");string result = reg.Replace(test, "");richTextBox2.Text = result;
[解决办法]
单行注释是以换行为结束标志的,上述都是匹配行内的,不会换行匹配