All Questions
Tagged with using-directives inheritance
8 questions
1
vote
1
answer
45
views
Contrasting solutions for visibility when inheriting from base class templates
In the following code will fail to compile because, despite the chain of public inheritance, HasFlag is not visible in DerivedFoo.
class BasicFoo {
public: bool HasFlag() const { return m_flag; }
...
- 49.3k
3
votes
1
answer
3k
views
error: static assertion failed: template argument must be a complete class or an unbounded array
I'm deriving from a base class in which I try to define a type. That type is dependent on itself via a variant, so it would require to know the memory layout of the base class upon definition. However,...
- 5,244
0
votes
2
answers
621
views
Get template parameter of derived class from base object
In short:
I have a base class A_base without template parameters and a derived class A that has two.
The function foo() only accepts base class objects
foo() is supposed to return an object which has ...
- 5,244
3
votes
2
answers
161
views
Why can't a typedef type be used to declare its parent class' ctors? [duplicate]
template<typename>
struct A
{
int n;
A(bool)
{}
};
template<typename>
struct B
{
struct C : A<B>
{
using Base = A<B>;
using A<B>::A;...
- 44.4k
11
votes
2
answers
160
views
Why does public overload conflict with private using directive on some compilers?
I came across the following situation in one of my projects, where a base class has a function template, which is hidden by a non-templated function in a derived class template. Further down the ...
- 323
53
votes
3
answers
4k
views
Why doesn't a using-declaration work to solve the diamond problem?
Please consider the following code:
struct A
{
void f()
{
}
};
struct B1 : A
{
};
struct B2 : A
{
};
struct C : B1, B2
{
void f() // works
{
B1::f();
}
//using ...
- 11.4k
0
votes
2
answers
1k
views
Using directive in Derived Class changes inheritance to Public
A very simple question but yet confusing:
Why does a using directive change the inheritance!?
This compiles with Comeau.
I have read that a using directive (decleration?) makes the variable public, ...
- 9,542
1
vote
5
answers
732
views
Inheriting from classes
In C#, how many classes can you inherit from?
When you write:
using System.Web.UI;
is that considered inheriting from a class?
- 3,766