fork download
copy 
  1. using System;
  2. using System.Text;
  3. using System.Text.RegularExpressions;
  4.  
  5. struct MyDate 
  6. { 
  7. 	public int? Year, Month, Day, Hour, Minute; 
  8.  
  9. 	private static readonly Regex dtRegex = new Regex(
  10. 		@"^(?<year>\d{4})?-(?<month>\d\d)?-(?<day>\d\d)?"
  11. 	+   @"(?:T(?<hour>\d\d)?:(?<minute>\d\d)?)?$",
  12. 		RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
  13.  
  14. 	public static bool TryParse(string input, out MyDate result)
  15. 	{
  16. 		Match match = dtRegex.Match(input);
  17. 		result = default(MyDate);
  18.  
  19. 		if (match.Success)
  20. 		{
  21. 			if (match.Groups["year"].Success)
  22. 				result.Year = Int32.Parse(match.Groups["year"].Value);
  23. 			if (match.Groups["month"].Success)
  24. 				result.Month = Int32.Parse(match.Groups["month"].Value);
  25. 			if (match.Groups["day"].Success)
  26. 				result.Day = Int32.Parse(match.Groups["day"].Value);
  27. 			if (match.Groups["hour"].Success)
  28. 				result.Hour = Int32.Parse(match.Groups["hour"].Value);
  29. 			if (match.Groups["minute"].Success)
  30. 				result.Minute = Int32.Parse(match.Groups["minute"].Value);
  31. 		}
  32.  
  33. 		return match.Success;
  34. 	}
  35.  
  36. 	public static MyDate Parse(string input)
  37. 	{
  38. 		MyDate result;
  39. 		if (!TryParse(input, out result))
  40. 			throw new ArgumentException(string.Format("Unable to parse MyDate: '{0}'", input));
  41.  
  42. 		return result;
  43. 	}
  44.  
  45. 	public override string ToString()
  46. 	{
  47. 		return string.Format("{0:0000}-{1:00}-{2:00}T{3:00}:{4:00}", Year, Month, Day, Hour, Minute);
  48. 	}
  49.  
  50. 	public static implicit operator MyDate(string input)
  51. 	{
  52. 		return Parse(input);
  53. 	}
  54. }
  55.  
  56. class Program
  57. {
  58.     static void Main(string[] args)
  59.     {
  60. 		foreach (var testcase in new [] { 
  61. 				"2011-11-07T11:17",
  62. 				"-11-07T11:17",
  63. 				"2011--07T11:17",
  64. 				"2011-11-T11:17",
  65. 				"2011-11-07T:17",
  66. 				"2011-11-07T11:",
  67. 				// extra:
  68. 				"--T11:17", // (11:17 am, no date, only time)
  69. 				"-11-07", // (november the 7th, no year, no time)
  70. 				// failures:
  71. 				"2011/11/07 T 11:17",
  72. 				"no match" })
  73. 		{
  74. 			MyDate parsed;
  75. 			if (MyDate.TryParse(testcase, out parsed))
  76. 				Console.WriteLine("'{0}' -> Parsed into '{1}'", testcase, parsed);
  77. 			else
  78. 				Console.WriteLine("'{0}' -> Parse failure", testcase);
  79. 		}
  80. 	}
  81. }
  82.  
  83.  
Success #stdin #stdout 0.05s 38104KB
comments ()
stdin
copy 
Standard input is empty
stdout
copy 
'2011-11-07T11:17' -> Parsed into '2011-11-07T11:17'
'-11-07T11:17' -> Parsed into '-11-07T11:17'
'2011--07T11:17' -> Parsed into '2011--07T11:17'
'2011-11-T11:17' -> Parsed into '2011-11-T11:17'
'2011-11-07T:17' -> Parsed into '2011-11-07T:17'
'2011-11-07T11:' -> Parsed into '2011-11-07T11:'
'--T11:17' -> Parsed into '--T11:17'
'-11-07' -> Parsed into '-11-07T:'
'2011/11/07 T 11:17' -> Parse failure
'no match' -> Parse failure
https://ideone.com/rukw4
language:
C# (gmcs 5.20.1)
created:
13 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!