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Type casting in c++


By : user3851923
Date : October 15 2020, 11:12 AM
hope this fix your issue Not all objects. Every object in C++ has a type. That type of an object defines whether a cast to int exists, and if so, what algorithm is used.
code :


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Casting generic to interface type - Unable to cast object of type 'System.RuntimeType' to type


By : Steve Liang
Date : March 29 2020, 07:55 AM
Any of those help You cannot cast (IRepository) type with type is Type class,
you can use Activator.CreateInstance to create object CustomerRepository, you also don't need to use Select, instead, use ToDictionary directly, the code below:
code :
var myRepositories = Assembly.GetAssembly(typeof(Repository<>))
       .GetTypes()
       .Where(x => x.BaseType != null && 
                   x.BaseType.GetGenericArguments().FirstOrDefault() != null)

       .ToDictionary(x => x.BaseType.GetGenericArguments().FirstOrDefault(), 
                            x => Activator.CreateInstance(x) as IRepository );

Does casting to char* and then casting back to original type break strict aliasing?


By : user3572602
Date : March 29 2020, 07:55 AM
Hope this helps That works and is well defined because the alignment of the original pointer will match the int.
Only issue casing a char* to an int* can be alignment requirements. Certain architectures require an int to be aligned on a 4-byte boundary (ie. the last two binary digits of the pointer are 0). A char* generally does not have that limitation.

run time error when Casting (down casting) a type to another subType


By : Ersin Güven
Date : March 29 2020, 07:55 AM
With these it helps I am unsure of the precise reasons a cast from Derived to MoreDerived fails here. However, a potential workaround (note: possibly code smell) is the as operator:
code :
public static MoreDerived AsMoreDerived (this Derived d)
{
    return d as MoreDerived;
}

Why variable of long type is giving different answer after casting and before casting in the following code as both are


By : user3708260
Date : March 29 2020, 07:55 AM
I wish did fix the issue. The tricky part is int intChallenge = 2147483647 constant which is the maximum value for positive int (see Integer.MAX_VALUE).
When you perform byteChallenge + shortChallenge + intChallenge it is an int arithmetic statement which results in integer overflow. In your example the integer overflow result is a negative number.

Casting Anonymous type throws casting error


By : rakshit chauhan
Date : March 29 2020, 07:55 AM
it helps some times Don't use an anonymous type - use the actual type you need. Anonymous types can only be using within a method - they can't be passed in as parameters ore return types and are not suitable for serialization in general.
Additionally, you shouldn't use ArrayList - it is not type safe. Use a generic collection like List instead.
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