230 questions
3
votes
2
answers
105
views
Disambiguating ambiguous function overloads because of converting constructor
Given a wrapper type
template <typename T>
struct Ptr
{
Ptr(T*);
};
a class hierarchy
struct Base {};
struct Derived : Base {};
and a set of function overloads
void f(Ptr<Base>);
...
- 101
1
vote
1
answer
98
views
How to check what constructor overload is used
If I have a class constructor with two overloads taking in different inputs, is there a way to tell them apart? For example,
class example
{
double ExampleDouble;
char ExampleChar;
public:
...
- 19
0
votes
0
answers
63
views
Should a constructor with a std::initializer_list be explicit?
I am designing a container (yeah, do not reinvent the wheel, I know). Let's call it Container<T>.
I have a constructor to allow the initial number of elements:
explicit Container(std::size_t ...
- 999
1
vote
0
answers
51
views
CS0121 Ambiguous Call with Collection Initializer [duplicate]
I'm on a team with two other devs. For the past few months I've been working on a project in C# 12 independently, and only recently have the other devs pulled my code and run it. For one of them it ...
- 73
1
vote
0
answers
179
views
How can I overload a constructor in a private nested class without getting a "Resource Not Found" error when I call Inherited Create?
I have a Managed Record named TEmail with a nested private class called TEmailForm that inherits from TForm. The idea is my email Record can create a modal form as needed for the user to type an email....
- 9,514
0
votes
2
answers
55
views
How can I call constructor with less parameters with no assignment of default value to a class variable in Java?
public class Sample {
int id;
String name;
int age;
Sample(int i, String n){
id = i;
name = n;
}
Sample(int i, String n, int a){
id = i;
...
- 1
1
vote
1
answer
96
views
Deduce member size from initialization list in constructor (CWG 1591) What's the right way? [duplicate]
I have a class Vec<C> that works as below, and I need to know a way to write the constructor and/or deduction guide such that a braced-enclosed initializer list deduces C as std::array<T,N>...
- 394
2
votes
3
answers
164
views
Two identical constructors however compiler selects the templated one
I am trying to implement a list container in C++, and I have problem with compiler selecting the wrong constructor overload.
The constructors are as follows:
list(size_type count, const T& value);
...
- 61
3
votes
1
answer
167
views
Inheriting constructors and forwarding reference
Consider the following two classes:
struct Base {
Base() = default;
Base(auto&&);
};
struct Derived : Base {
using Base::Base;
};
If I try the following test with Type = Base and ...
- 3,205
0
votes
1
answer
48
views
Overloaded function not outputting correct answer
I am attempting to create an overloaded contructor that will take in integer and add them with the byteAdd function. However; whenever I compile the output is always the default constructor rather ...
1
vote
2
answers
165
views
How to make compiler differentiate f(double...) and f(int, double...)
I am writing a small library for working with polynomials.
The main class is called poly and it contains 4 overloaded constructors.
An object of class poly is a representation of one polynomial.
Full ...
3
votes
2
answers
930
views
OOP Python Overloading the '__init__' method
I am porting a project from Java to Python and there is a class with multiple constructors. I'm trying to port that same idea to python, in a pythonic way. I've recently been informed of the typing....
- 136
0
votes
0
answers
28
views
how can i limit the user to a certain input [duplicate]
Hi I'm trying to learn java
This a simple program that stores a patient's blood details, well in any case how can i keep the program accurate by means of returning an error message if the input was ...
- 1
1
vote
2
answers
737
views
Class constructor overloading in Typescript
I am working on a class PlaybackControl, I use it to create two HTMLElements:
PlaybackControlButton: HTMLButtonElement
PlaybackControlMenu: HTMLDivElement
Now, to initialise the class object, I need ...
- 416
1
vote
1
answer
1k
views
Can I overload init from C++ side in pybind11?
If in C++ a class had an overloaded constructor:
class MyClass {
std::string name;
public:
MyClass(){};
MyClass(std::string name_){ name = name_;}
};
how do I expose this to python? Can I ...
- 3,203