internal static T?UniqueMethod(IEnumerable <T> enumerable, UniqueFunction uniqueFunction)
{
return(uniqueFunction switch
{
UniqueFunction.First => enumerable.FirstEx(),
UniqueFunction.FirstOrDefault => enumerable.FirstOrDefault(),
UniqueFunction.Single => enumerable.SingleEx(),
UniqueFunction.SingleOrDefault => enumerable.SingleOrDefaultEx() !,
_ => throw new InvalidOperationException(),
});
internal T UniqueMethod(IEnumerable<T> enumerable, UniqueFunction uniqueFunction)
{
switch (uniqueFunction)
{
case UniqueFunction.First: return enumerable.FirstEx();
case UniqueFunction.FirstOrDefault: return enumerable.FirstOrDefault();
case UniqueFunction.Single: return enumerable.SingleEx();
case UniqueFunction.SingleOrDefault: return enumerable.SingleOrDefaultEx();
default:
throw new InvalidOperationException();
}
}
private Expression BindUniqueRow(Type resultType, UniqueFunction function, Expression source, LambdaExpression predicate)
{
return(AsProjection(Visit(source)).Projector);
}
private Expression BindUniqueRow(Type resultType, UniqueFunction function, Expression source, LambdaExpression predicate)
{
return AsProjection(Visit(source)).Projector;
}
