Questions tagged [template-classes]
184 questions
1
vote
4 answers
Is it possible to use inside a template class, a vector of class stack elements?
I have a "stack.h" and a "stack.cpp" file that define a hand-made stack class.
What i want to do now, is to create another class "name" that has in it's composition a vector of "nr" stacks and i'm not sure where to start.
depou.h:
#pragma…
MihaiGrad
- 105
- 1
- 1
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1
vote
2 answers
What is wrong with this simple C++ template class?
The following snippet is in a header file:
// Represents NxN scalar values (aka square matrix).
template
class dummy
{
public:
float& operator[](const std::size_t ind) { return scalars[ind]; }
private:
float…
pepe
- 814
- 8
- 12
1
vote
3 answers
c++ : template member addition function
I have an interface IOperand :
class IOperand
{
public:
virtual IOperand * operator+(const IOperand &rhs) const = 0;
virtual std::string const & toString() const = 0;
}
And the class Operand :
template
class Operand : public…
Jérémy Pouyet
- 1,989
- 6
- 28
- 55
1
vote
1 answer
How to overload operator= in a templated class with a dynamically sized array
I'm new to making my own template classes in C++, and after several hours of searching online for answers and toying with the function & its parameters, I've given up. I'm having run-time trouble with the following class' "=" operator:
In…
A Frayed Knot
- 476
- 5
- 20
1
vote
1 answer
Using an iterator template class as a parameter to a function
return Graph_iterator_Vertex(Vertexs.begin());
I do not understand why this line is called the copy constructor, although there is my constructor with a parameter. The arguments constructor parameter written specifically for this design.
All that…
ggoha
- 1,996
- 3
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- 31
1
vote
1 answer
Usage of template class with template method in C++
I have a class, which have a public templated methods.
This class has 2 strategies of behavior, which i want to pass via class template.
template
class SomeClass {
public:
template
void ProcessType(){}
};
// And do…
dr11
- 5,166
- 11
- 35
- 77
1
vote
3 answers
Defining a function template as a callback for a class template
I want to define a class template that takes a callback function of the same type. Something like:
typedef template bool CallbackFn( T x );
template class MyClass
{
public:
MyClass() {}
~MyClass()…
jensph
- 763
- 1
- 10
- 22
1
vote
1 answer
Dynamic Allocation in Template Class Constructor
I am working on a stack class and have two constructors. One of interest is this one.
template
stack::stack( const int n)
{
capacity = n ;
size = 0 ;
arr = new T [capacity] ;
}
I am calling it inside main like this.
stack…
Sasha
- 492
- 2
- 6
- 21
0
votes
2 answers
How to create a initializer list constructor using a custom template subclass?
Basically, what I wanna do is be able to construct an object using a list of primitives like this:
int main()
{
// C primitives initialization list
int matrix[2][2] = { { 1, 2 }, { 2, 3 }, };
// C++ stl class initialization list
std::string…
Gerson
- 3
- 1
0
votes
0 answers
Add element to own c++ template class with overloading operator+=
I have to write a header file to an existing cpp with making an own template class. There is a simple add method but I have to overload the operator+= function.
If I try to add the elements separately, like this:
ls += lmb;
ls += lmc;
than it works…
programmerGirl82
- 3
- 2
0
votes
1 answer
'std::logic_error' what(): basic_string::_M_construct null not valid
I have this cpp file and I have to write write a header for it, with an own template class. When I try to run the code it throws this 'std::logic_error' what(): basic_string::_M_construct null not valid error. It causes by the…
programmerGirl82
- 3
- 2
0
votes
1 answer
Im making a list with iterators and node classes nested in it but for some reason the iterator class is not making the list class a friend
template
class List
{
class Node
{
public:
Node()
{
next = 0;
data = 0;
}
Node* next;
T data;
};
Node* head = new Node;
Node* tail = new Node;
int size = 0;
public:
class Iterator
{
Node* curr;
…
ppp
- 1
- 1
0
votes
1 answer
What exactly does most specialized class mean in C++?
Let's say we have the following:
template
class A {}
template
class A {}
template
class A {}
Now, I know that we need to select the most specialized class, but for…
Sumukh Bhat
- 91
- 5
0
votes
1 answer
Overloading operator in class template with more than one template parameter
Disclaimer: this is a homework assignment, but nothing in the notes or our textbook seems to answer my question, so I'm coming here.
I have a Queue template class, and one of the things I need to do is overload the + operator to merge two Queue…
Sandman
- 1
0
votes
0 answers
Mock is returning null after constructors is called
I want to mock the hidden property Identity, but MyChannelMock.Object.Identity is null after constructor is called.
The class looks like this:
public abstract class CommunicationRouter
where TChannelType : class,…
Cristi
- 1
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