42 lines
916 B
C#
42 lines
916 B
C#
using UnityEngine;
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public static class SingletonHelper
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{
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public static void Assign<T>(ref T field, T instance) where T : Object
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{
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if (!field)
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{
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field = instance;
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return;
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}
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Debug.LogErrorFormat(instance, "Duplicate instance of singleton class {0}. Only one should exist at a time.", typeof(T).Name);
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}
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public static void Unassign<T>(ref T field, T instance) where T : Object
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{
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if (field == instance)
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{
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field = null;
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}
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}
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public static T Assign<T>(T existingInstance, T instance) where T : Object
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{
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if (!existingInstance)
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{
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return instance;
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}
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Debug.LogErrorFormat(instance, "Duplicate instance of singleton class {0}. Only one should exist at a time.", typeof(T).Name);
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return existingInstance;
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}
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public static T Unassign<T>(T existingInstance, T instance) where T : Object
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{
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if (instance == existingInstance)
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{
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return null;
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}
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return existingInstance;
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}
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}
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