using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"if\s*(\((?>[^()]|(?1))*\))(*SKIP)(*F)|(\w+)(\s*<=[^;]*)";
string substitution = @"$2_yes$3";
string input = @"always @(posedge clk or negedge rst_n)
if(!rst_n)begin
d1 <= 0; //perl_comment_4
//perl_comment_5
d2 <= 1 //perl_comment_6
+ 2;
end
else if( d3 <= d4 && ( d5 <= 3 ) ) begin
d6 <= d7 +
(d8 <= d9 ? 1 : 0);
//perl_comment_7
d10 <= d11 <=
d12
+ d13
<= d14 ? 1 : 0;
end";
RegexOptions options = RegexOptions.Singleline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx