using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?(DEFINE)
(?<chars>[-\w]) # equals to A-Z, a-z, 0-9, _
(?<af>=>) # ""arrow function""
(?<item>
(?!(?&af)) # no af at the beginning
(?:(?&af)?(?&chars)++)+
(?!(?&af)) # no af at the end
)
)
^(?&item)$";
string input = @"Field_name_true2
abc=>d
=>abc
abc=>abc
somewhere_over_the_ocean=>
somewhere_over_the_ocean=>dda
somewhere-over-the-ocean
";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
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