C# 템플릿 상속

가끔 사용하게 되는 기능 중에 Template 기능은 항상 헛갈린다.
메모를 해두자

·미리보기 | 소스복사·
  1. using System;
  2. using System.Reflection;
  3. public class Singleton<T> where T : class
  4. {
  5.     private static object _syncobj = new object();
  6.     private static volatile T _instance = null;
  7.     public static T i{
  8.         get
  9.         {
  10.             if (_instance == null)
  11.             {
  12.                 CreateInstance();
  13.             }
  14.             return _instance;
  15.         }
  16.     }
  17.     private static void CreateInstance()
  18.     {
  19.        lock (_syncobj)
  20.         {
  21.             if (_instance == null)
  22.             {
  23.                 Type t = typeof(T);
  24.                 // Ensure there are no public constructors…
  25.                 ConstructorInfo[] ctors = t.GetConstructors();
  26.                 if (ctors.Length > 0)
  27.                 {
  28.                    throw new InvalidOperationException(String.Format(“{0} has at least one accesible ctor making it impossible to enforce singleton behaviour”, t.Name));
  29.                 }
  30.                 // Create an instance via the private constructor
  31.                 _instance = (T)Activator.CreateInstance(t, true);
  32.             }
  33.         }
  34.     }
  35. }


“C# 템플릿 상속”의 26개의 댓글

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