using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @" \(\?P<(\w+)> # named group (name captured as group 1): (?P<name>
( # matching pattern as group (2) in form: b(R1)a1...(R2)a2
[^)(]*+ # `b` (before) part - any not `)(` characters
(?: # non capturing group for repeated `(R)a`
\((?2)\) # `R` - reference to group 2 for possible nested braces
[^)(]*+ # 'a' (after) part - any not `)(` characters
)* # `(R)a` repetition is optional
) # end the group 2
\) # end of the named group to match";
string substitution = @"{\1}";
string input = @"(?P<kind>(frames_cleanpass)|(disparity))/(?P<subset>\w+)/(?P<scene_1>\w+)/(?P<scene_2>\w+)/(?P<side>\w+)/(?P<scene_3>\w+)\.(?P<ext>(?(3)pfm|png))";
RegexOptions options = RegexOptions.IgnorePatternWhitespace;
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