logo
down
shadow

Is it necessary to overload operator in this specific case


Is it necessary to overload operator in this specific case

By : user2184524
Date : November 19 2020, 04:01 AM
will help you , The line
code :
if (this != a)
if (this != &a)
this->~Complex();
Complex(const Complex &a)
{
   copy(a);
}


Share : facebook icon twitter icon
How should I write a copy constructor in case of Singleton class and how should I overload = operator for same?

How should I write a copy constructor in case of Singleton class and how should I overload = operator for same?


By : Shu
Date : March 29 2020, 07:55 AM
I hope this helps you . Either you make it non-copyable as explained here
How do I make this C++ object non-copyable?
code :
class Rect{
     Rect( const Rect& ) = delete;
     Rect& operator=( const Rect& ) = delete;
     . . .
}
overload operator>> for a specific class

overload operator>> for a specific class


By : Ilya Shevyrev
Date : March 29 2020, 07:55 AM
should help you out I implement operator overloading for both >> and <<
code :
QDataStream & operator>> (QDataStream & stream, chromosome & myChromosome){

myChromosome = chromosome();
Is it dangerous to overload bool operator in this case

Is it dangerous to overload bool operator in this case


By : franxic
Date : March 29 2020, 07:55 AM
I hope this helps you . That is not good enough. Since you're stuck with C++03, safe-bool idiom is what you should be using if you need such a thing at all (otherwise, explicit conversion function should be preferred).
An alternative solution is to return boost:optional instead:
code :
boost::optional<point> intersect(const line& a, const line& b);
Making an Operator Overload context specific

Making an Operator Overload context specific


By : Роман Кравченко
Date : March 29 2020, 07:55 AM
will help you You cannot restrict regular function/operator to context, but you can restrict it by scope thanks to namespace.
code :
enum class E {A, B};

struct C
{
    int operator [](const std::pair<E, E>& p) const
    {
        return data[static_cast<int>(p.first) * 2 + static_cast<int>(p.second)];
    }
    std::array<int, 4> data{{1, 2, 3, 4}};
};

namespace comma
{
    std::pair<E, E> operator , (E lhs, E rhs) { return { lhs, rhs }; }
}

int main()
{
    C c;

    {
        using namespace comma; // operator , is valid here.

        std::cout << c[E::A, E::B] << std::endl;
        auto p = (E::A, E::B); // but also here :/ p = {E::A, E::B}
        static_cast<void>(p);
    }
    {
        std::cout << c[E::A, E::B] << std::endl; // result in c[E::B]
        auto p = (E::A, E::B); // p = E::B
        static_cast<void>(p);
    }
}
overload operator+ only for specific case of the class

overload operator+ only for specific case of the class


By : SlemHundy
Date : March 29 2020, 07:55 AM
seems to work fine
Is there any way I can overload the operator only for the case when the matrices are of equal size (and get an error when I try to compile adding two matrices that can not be added)?
code :
template <size_t NUM_ROWS, size_t NUM_COLUMNS>
class matrix
{
   ...
};
Related Posts Related Posts :
  • C++ on Vistual Studio with CMake error: manifest 'build.ninja' still dirty after 100 tries
  • Is there a way to automatically resolve an overloaded method via a template parameter?
  • Fastest way to find pair in a vector, remove it while iterating
  • error C2440: '=': cannot convert from 'const char *' to 'LPCWSTR'
  • Unable to call boost::clear_vertex while using listS for the vertex and edge lists
  • Decoding binary data from serial port
  • Pattern to Implement an OO interface to a C program written in an imperative style
  • CEPH + Librados++ is not returning consisten results
  • `LoadLibraryExW` triggers exception `0xC0000023` from `NtMapViewOfSection`
  • static_cast to a struct type to access all of its member variable
  • Forward declaration for boost::intrusive_ptr class to reduce compile time
  • How to use priority_queue with a non-static compare method of class instance?
  • Template parameters inside and outside class/struct
  • Determining prime number
  • How to resolve ambiguity between constructors taking std::string and std::vector
  • My program crashes when I try to change private values from an object
  • Unordered_map with custom class as key
  • Strict aliasing rules broken with templates and inheritance
  • C++ Derived Class Override Return Type
  • singly linked list c++ constructor, destructor and printing out
  • How to clone class with vector of unique_ptr to base class
  • error: no match for operator
  • std::vector doesnt accept my struct as template
  • selection of people's contours
  • how to fix the (Error using mexOpenCV) on matlab?
  • Is or was there a proposal for c++ to use the context for short enum values?
  • Fair assumptions about std::hash implementations
  • undefined reference to libusb using cyusb
  • Function returns null pointer instead of address
  • C++17 copy elision and object destruction
  • Input multiple strings via operator>> c++
  • Avoiding overflow boost container
  • How to Write a Lambda Wrapping a Function with Optional Return Value
  • Partial specialization with more template parameters
  • How to convert fixed size array to pointer on pointer array
  • Memory leak in const member constructor with tag dispatching
  • C++ function with a generic and optional class
  • Custom QGraphicsItem That Contains Child QGraphicsItems
  • Are There Restrictions on What can be Passed to auto Template Parameters?
  • Rotating line inside rectangle bounds
  • Why do I need dynamic memory allocation if I can just create an array?
  • How can I convert a text file into a form that MPI_Bcast can send?
  • How to get array of all `this` of an instance
  • Using pointers as parameters
  • Automatic type deduction with const_cast is not working
  • Why does std::is_rvalue_reference not do what it is advertised to do?
  • Function Template Specialization with Forward Declared Type
  • template deduction failed in vector
  • Is there a signed `sizeof` alternative in Qt
  • clarification on overloading the -> operator
  • What is __m128d?
  • QtConcurrent: why releaseThread and reserveThread cause deadlock?
  • Function receiving different value than passed
  • Can C++ close a '''fstream''' variable after '''.close()'''?
  • Comparing an element of a string array with a string
  • how to dereference a pointer of a map of pointers to objects in c++
  • How recursive function control flow change for static variable?
  • SDL 2 blitting BMP File
  • Why does an extremely large value cause this code to repeat infinitely?
  • Function returning different value than what is in function body before return statement
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org