Tags down


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 :

Share : facebook icon twitter icon

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<>))
       .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.
Related Posts Related Posts :
  • intellisense for empty Win32 projects
  • Parsing mathematical functions of custom types
  • Android play raw Audio from C++ side
  • How to access Active Directory using C++Builder?
  • String statements
  • Instruction-Level-Parallelism Exploration
  • Select from SQLite with Qt
  • Dynamic Memory Allocation
  • Maximum number of characters in a string
  • Float Values as an index in an Array in C++
  • Is 'using namespace std;' a standard C++ function?
  • Building a suffix tree in C++
  • Passing ifstream to a function in C++
  • Where would you use a friend function vs. a static member function?
  • Invalid free while performing a std::string assign with -O2 set in g++
  • Shutting down multithreaded NSDocument
  • C(++) malloc confusion
  • Portable c++ atomic swap (Windows - GNU/Linux - MacOSX)
  • C++ array initialization
  • How (i.e. what tool to use) to monitior headers sent by Curl (Cookie problem)
  • Understanding the library functions in c++
  • C++, read and write to a binary file at the same time
  • strange result when calling SHFileOperation to delete file after install MS office2003
  • C++ multiple inheritance preventing diamond
  • How do you create a simple comment header template for all new classes in Visual C++ 2010?
  • Is it possible to use cin with Qt?
  • How to debug a strange memory leak (C++)
  • What is meant by Resource Acquisition is Initialization (RAII)?
  • How should I go about building a simple LR parser?
  • Is there any non-GPL-opensource C\C++ H264 encoding library?
  • return pointer to data declared in function
  • How can I determine the current exception in a catch (...) block?
  • Dependency difference between Release & Debug
  • Help with memory allocation for multiplayer game server
  • C++ malloc - dynamic array
  • c++ InterlockedExchangePointer and pointer alignment
  • Using SQLite with Qt
  • How to select against which version of the Visual C++ libraries the application is compiled?
  • How to access image Data from a RGB image (3channel image) in opencv
  • Adding default arguments to variadic macro
  • Any exit status without explicitly using return /exit
  • Using C++ types in an ANTLR-generated C parser
  • How to ignore false positive memory leaks from _CrtDumpMemoryLeaks?
  • how to use dll?
  • C++ string literal data type storage
  • How to get qmake to generate "project dependencies" in a Visual Studio .sln project
  • Why would someone use C instead of C++?
  • C ReadProcessMemory - how to examine the memory area associated with a process
  • how can I force C++ macro substitution at the time I choose in this case?
  • C++: What is the appropriate use for the std::logic_error exception?
  • Is there a working C++ grammar file for ANTLR?
  • Copy Constructor?
  • How to start a voice quality PESQ test?
  • I'm trying to change my Maze traversal recursive coding part into a while loop
  • Providing less than operator for one element of a pair
  • Question about exact time of destruction of temporaries in C++
  • Please suggest some algorithm to find the node in a tree whose distance to its farthest node is minimum among all the no
  • Best practices with object manager
  • Using input to call a member function
  • How to find out if a character in a string is an integer
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org