All Questions
Tagged with inheritance templates
1,538
questions
2
votes
1
answer
34
views
Python Django access fields from inherited model
Hi I have a question related to model inheritance and accessing the fields in a Django template.
My Model:
class Security(models.Model):
name = models.CharField(max_length=100, blank=False)
class ...
- 99
-3
votes
1
answer
71
views
Hit a snag whilst adding a subclass to std::vector
My idea was initially to create my own custom vector with methods built in for various mathematical calculations, as well as the usual std::vector features, for the sake of regression analysis. I ...
0
votes
1
answer
51
views
How to access Base template parameters from Derived that is intended as a specialization?
Because partial specialization of a templated member function is not possible in C++ I now try to circumvent this through class template inheritance.
In this approach, I derive from the base class, ...
- 383
0
votes
1
answer
23
views
Again on Django template inheritance [duplicate]
The difficulty I have is precisely described in
Django Accessing Parent Data in templates from child data
but the answer given there, accepted by the OP, is given in the “recipe” spirit,
as are an ...
0
votes
2
answers
104
views
Deduce template parameter based on function to override of a base class
Let's start with some code.
class intClass {
public:
virtual ~intClass() = default;
virtual int sum(int a, int b) const = 0;
};
class doubleClass {
public:
virtual ~doubleClass() = ...
user24681855
0
votes
0
answers
18
views
Access a member of base class if both base and derived classes are nested inside of a template class [duplicate]
template <class T>
struct outer {
struct base {
int x;
};
struct derived : public base {
void func() {
++x;
}
};
};
This code produces an ‘x’ was not declared in ...
1
vote
0
answers
45
views
templated class segfaults when using inheritance [duplicate]
I am currently working on a raytracer, and I am trying to output the result using multiple ways at the same time (only through PPM format and using SFML atm).
To achieve that, I wrote an IOutput ...
- 45
0
votes
0
answers
90
views
C++ Templates for inheritance - How to use constructor?
I'm working on a C++ project where I use templates to easily switch between implementations of several inherited classes.
Combined with ceres solver, I've come across this situation where I need to ...
- 11
-1
votes
1
answer
60
views
How to make a std::shared_ptr type argument convert to Base Class automatically?
#include <utility>
#include "iostream"
template<class Vty>
class Base {
public:
Base(Vty value) : _baseValue(std::move(value)) {}
virtual auto print() -> void {
...
- 25
-1
votes
1
answer
90
views
How to override a template function in Subclass?
I want to make GroupBase as a interface...
#include "string"
#include "unordered_map"
template<class Vty>
class BaseV {
public:
BaseV() {
//logic
}
...
- 25
0
votes
0
answers
42
views
Why can't I access the protected member of a class when deriving it with CRTP pattern? [duplicate]
Why can't I access parent's class from derived class when using CRTP patten (see Base class)?
template <typename Derived>
class Common {
protected:
int common;
};
template <typename Derived&...
- 139
0
votes
1
answer
76
views
How to protect a templated derived class after being cast from a base class having the incorrect template type being used?
I'm trying to write a container that handles a vector of ObjArray's which is a templated class. ObjArray inherits from a base class and the container holds a list of base pointers which I cast to the ...
- 35
2
votes
2
answers
205
views
CRTP design where base class instantiates members of types specified by the derived class
As described in crtp-pass-types-from-derived-class-to-base-class by Evg, the compiler is unable to deduce the type Impl::TType in the declaration of class Base:
template <typename Impl>
struct ...
- 23
0
votes
0
answers
49
views
Inherit custom operator= from template base class [duplicate]
I have a template base class that implements void operator=(T value). Then I have a derived template class which should just inherit that operator, but this doesn't work. (See compile error in the ...
- 469
0
votes
1
answer
91
views
Nested template class with std::enable_if, C++
I have a template class B whose first parameter T1 must inherit class A, and second parameter T2 is used in nested class C:
class A { ... };
template<typename T1, typename T2 = T1, typename = std::...
- 11