logo
Tags down

shadow

How to forward declare enum class as inner class of a templated class?


By : Anirudh
Date : September 14 2020, 10:00 PM
Hope that helps I'm abstracting the interrupt vector table on multiple microcontrollers. I am using template classes in the form of (InterruptVectorTable.hpp(definition, included in implementation)) , First of all, this is not how you introduce a new template class:
code :
// Wrong!
template<>
InterruptVectorTable<class Device, class ResultType>
{
    // ...
}
template<class Device, class ResultType>
class InterruptVectorTable
{
    // ...
};
template<>
class InterruptVectorTable<DeviceAtMega328p, uint8_t>
{
    enum class IRQType : uint8_t
    {
        //RESET_IRQn = 0,               // Not available.
        INT0_IRQn = 1,
        INT1_IRQn = 2,
        PCINT0_IRQn = 3,
        PCINT1_IRQn = 4,
        PCINT2_IRQn = 5,
        WDT_IRQn = 6, 
        //...........
    };
};


Share : facebook icon twitter icon

How do I forward declare a class derived from a forward declared template base class?


By : jell22
Date : March 29 2020, 07:55 AM
it helps some times I am trying to forward declare a class that is derived from a template class that must also be forward declared. , Just forward declare the class name:
code :
class Derived;

Is it possible to forward declare a enum class to be used in a derived class?


By : V Share Rose
Date : March 29 2020, 07:55 AM
wish of those help That's declaring that there's an enum called LineType inside Parser or: Parser::LineType .
In the derived class you have an enum called LineType, and its full 'name' will be: GUIParser::LineType.

Using a class as a template parameter for a templated class with forward declaration


By : Modassarrahman Rahma
Date : March 29 2020, 07:55 AM
this will help Bar requires the full Foo definition because it contains a data member of type Foo. You could not forward declare in this case. In this respect, Bar is the equivalent of
code :
class BarFoo 
{  
 public:
    Foo baz;
};

How to forward declare templated type that should belong to a class?


By : Brian Folk Caldwell
Date : March 29 2020, 07:55 AM
wish of those help You can't forward declare a nested typedef since at the point of the forward declaration B would be an incomplete type. You can however solve your problem like below:
code :
class B;

class A {
  std::shared_ptr<B> _b;
public:
  typedef std::shared_ptr<A> Ref;
};

class B {
  A::Ref _a;
public:
  typedef std::shared_ptr<B> Ref;
};

How to Forward Declare a Class that Relies on a Variant Definition, Which In Turn Relies on a Templated Class?


By : mcmatt90
Date : March 29 2020, 07:55 AM
This might help you I don't think you can.
The variant's alternatives must all be complete types, and your Fum stores a T as a member.
Related Posts Related Posts :
  • The difference between delete and the destructor when both called?
  • What happens inside of a C++ constructor?
  • Mixing overriding and overloading in C++
  • Is std::stringstream::flush() supposed to do anything?
  • How does Qt::DirectConnection act when used in multi-threaded environment?
  • bison/flex: calculator interprets double values as integers so I added #define YYSTYPE double, but I multiple compilatio
  • Register the environment varibles for TBB
  • modelo of square is zero, factorial modelo problem
  • Split student list that has format like: 0001 William Bill Junior 8.5
  • How to use the overloaded "operator<<" properly?
  • Why Smart pointers can not be declared the usual Pointer way
  • I can't figure out what is wrong my implementation of MST with Kruskal algorithm
  • C++ how would one simplify this template so that it is not specialized?
  • What happens when a reference of an object (with different types) is deleted?
  • Is main() always on the stack?
  • What if one process in a MPI program proceeds more slowly than others?
  • I'm trying to get current date and time in cpp but can't understand these lines
  • make_pair() in C++
  • How can I access to derived members from a pure virtual base class function?
  • Constructor cannot be redeclared. Why?
  • Is there any similar function to glibc mtrace() function in c++?
  • faster erase-remove idiom when I don't care about order and don't have duplicates?
  • How to store variable as nothing
  • How to properly free a set of pointers?
  • C++ file IO - ASCII value instead of Binary value
  • Weird behavior of a simple for-loop code using "find" function in C++(to increment value if a certain sub-stri
  • I want two loops to run in parallel
  • Why would it be good to use dynamic memory allocation with serial communication?
  • non static member in static cpp
  • Non type template parameter
  • 3x3 Matrix Rotation with non uniform scaling
  • what actually sets the _WIN32 or _WIN64 preprocessor?
  • How to return a type from C++ functions?
  • c++ *& and null validation
  • Difference between Array, Vector and Matrix in C++?
  • Unable to enter while loop:"Segmentation fault"
  • Modify value const method
  • Unable to compile with Error C2440 due to type cast from C to C++
  • I try to understand what pointer variable is changing after xor operation
  • When declaring a pointer, VS automatically moves the asterisk to the pointer's type
  • static member declared const but initialized as constexpr
  • How to obtain the URL of re-directed webpage in C++
  • I need to change the main program, because I want input from the user how can I do it?
  • How to create a POST request with wininet in C++
  • How "lock add" is implemented on x86 processors
  • c++ assigment operator with two or more template arguments
  • Problem with compiling a mingw32 executable on linux system with boost.asio
  • Why is the ENTRY() in my linker script not being set to the . = <address> section?
  • Why is min_element() returning the index of the minimum element, instead of an iterator?
  • Can priority queue be made by using simple queues
  • How to improve vector insert time
  • OpenGL integer texture raising GL_INVALID_VALUE
  • better method rather than using cin.ignore in c++
  • C++ A function that can return one of two types depending on the accepted value
  • How can i declare object in an if statement and use it wherever i want?
  • How to sort an unordered hash map by value
  • const references of set elements do not preserve information
  • my program wont work properly and my function keeps throwing segmentation fault
  • How can I split string and integer when user input both the string and the integer in the same line in C++?
  • Combine visitors in VisitorPattern
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk