public static Func <int, object> CreateCollectionInstanceFactory(Type abstractType, Type targetType, Type comparisonType)
#endif // !UNITY
{
var constructor = UnpackHelpers.GetCollectionConstructor(targetType);
var parameters = constructor.GetParameters();
switch (parameters.Length)
{
case 0:
{
return(_ =>
#if !UNITY
(T)
#endif // !UNITY
constructor.InvokePreservingExceptionType());
}
case 1:
{
if (parameters[0].ParameterType == typeof(int))
{
return(capacity =>
#if !UNITY
(T)
#endif // !UNITY
constructor.InvokePreservingExceptionType(capacity));
}
else if (UnpackHelpers.IsIEqualityComparer(parameters[0].ParameterType))
{
var comparer =
#if !UNITY
EqualityComparer <TKey> .Default;
#else
UnpackHelpers.GetEqualityComparer(comparisonType);
#endif // !UNITY
return(_ =>
#if !UNITY
(T)
#endif // !UNITY
constructor.InvokePreservingExceptionType(comparer));
}
break;
}
case 2:
{
var comparer =
#if !UNITY
EqualityComparer <TKey> .Default;
#else
UnpackHelpers.GetEqualityComparer(comparisonType);
#endif // !UNITY
if (parameters[0].ParameterType == typeof(int) &&
UnpackHelpers.IsIEqualityComparer(parameters[1].ParameterType))
{
return(capacity =>
#if !UNITY
(T)
#endif // !UNITY
constructor.InvokePreservingExceptionType(capacity, comparer));
}
else if (UnpackHelpers.IsIEqualityComparer(parameters[0].ParameterType) &&
parameters[0].ParameterType == typeof(int))
{
return(capacity =>
#if !UNITY
(T)
#endif // !UNITY
constructor.InvokePreservingExceptionType(comparer, capacity));
}
break;
}
}
throw SerializationExceptions.NewTargetDoesNotHavePublicDefaultConstructorNorInitialCapacity(
#if !UNITY
typeof(T)
#else
abstractType
#endif // !UNITY
);
}