member-functions Questions
3
Solved
How do I call invoke_result correctly for a member function? Or specifically for an operator member function. I tried std::invoke_result<T::operator[], size_type> to no success. What would be...
Pet asked 6/7, 2019 at 0:31
1
Solved
From the C++ standard working draft:
Default constructors ([class.default.ctor]), copy constructors, move constructors ([class.copy.ctor]), copy assignment operators, move assignment operators ([c...
Wrapper asked 9/2 at 13:13
3
I have this class template
template <typename T>
class Wrapper
{
public:
virtual void parse(std::string s) = 0;
protected:
T value;
};
ideally, each type should know how to parse itse...
Dunno asked 19/9, 2013 at 14:27
2
Solved
Is it possible to have a class with an optional template parameter that can be called like this?:
#include <iostream>
template <typename T = void>
class A final
{
public:
// This clas...
Sperry asked 26/9, 2023 at 13:8
11
Solved
How do I obtain a function pointer for a class member function, and later call that member function with a specific object? I’d like to write:
class Dog : Animal
{
Dog ();
void bark ();
}
…
Dog...
Bankroll asked 28/9, 2009 at 8:30
6
Solved
I can easily bind member functions to a std::function by wrapping them with a lambda expression with capture clause.
class Class
{
Class()
{
Register([=](int n){ Function(n); });
}
void Regi...
Transpacific asked 16/6, 2013 at 9:17
6
Solved
I'm relatively new to Python and struggling to reconcile features of the language with habits I've picked up from my background in C++ and Java.
The latest issue I'm having has to do with encapsu...
Louanneloucks asked 9/4, 2012 at 10:58
1
Solved
I have a C++ function that takes a std::function as an input argument.
Specifically, a std::function<void (const Message&, Error)>.
In my use-case, the caller may bind the std::function t...
Gobble asked 26/4, 2023 at 20:10
1
A member function pointer must be invoked using the .* (or ->*) syntax, so it can't be passed to a higher-order function:
#include <vector>
void for_each(auto const& v, auto f) {
for...
Storz asked 23/2, 2023 at 19:54
1
Solved
I was trying to take address of templated member function instance. For some reason, it is not working. Here is minimal reproducible example:
class X {
public:
template<bool B>
inline voi...
Wurth asked 27/1, 2023 at 10:31
15
Solved
Suppose I have two C++ classes:
class A
{
public:
A() { fn(); }
virtual void fn() { _n = 1; }
int getn() { return _n; }
protected:
int _n;
};
class B : public A
{
public:
B() : A() {}
vi...
Saintly asked 7/6, 2009 at 15:46
3
Solved
In this link : Implicit object parameter
In this quote :
If any candidate function is a member function (static or non-static) that does not have an explicit object parameter (since C++23), but n...
Assoil asked 3/6, 2022 at 7:50
12
What is the meaning of const in declarations like these?
class foobar
{
public:
operator int () const;
const char* foo() const;
};
Marrero asked 15/4, 2009 at 13:27
2
Solved
Consider a class Bar in two versions of a library:
/// v1
class Bar
{
void get_drink()
{
std::cout << "non-const get_drink() called" << std::endl;
}
};
/// v2
class Bar
...
Inutile asked 21/9, 2021 at 3:42
8
Solved
I'd like to set up a function pointer as a member of a class that is a pointer to another function in the same class. The reasons why I'm doing this are complicated.
In this example, I would like ...
Bozuwa asked 8/3, 2010 at 15:54
3
Solved
I have a basic question related to multiple inheritance in C++. If I have a code as shown below:
struct base1 {
void start() { cout << "Inside base1"; }
};
struct base2 {
void start() { c...
Castellated asked 27/7, 2011 at 14:10
3
Solved
I'm learning Python and have two files in the same directory.
printer.py
class Printer(object):
def __init__(self):
self.message = 'yo'
def printMessage(self):
print self.message
if __name_...
Alkyd asked 30/7, 2017 at 1:52
2
Solved
I currently have two unnamed classes defined in my Foo.h:
class Foo {
public:
Foo();
class {
private:
int x;
int y;
public:
int GetX() { return x; }
int GetY() { return y; }
} Sub1;
cl...
Pushed asked 20/5, 2015 at 15:30
3
I have a class with a member function with a lengthy return type:
/* MyClass.hpp */
namespace foo
{
class MyClass
{
public:
SomeNameSpace::Lengthy_return_type_name someFunction(params...);
}...
Unsightly asked 9/10, 2020 at 6:47
4
Solved
I have a template class and a member function print() to print the data.
template<typename T>
class A
{
public:
T data;
void print(void)
{
std::cout << data << std::endl;
...
Elate asked 6/7, 2020 at 7:10
4
Solved
How do I get the absolute address of a member function in C++? (I need this for thunking.)
Member function pointers don't work because I can't convert them to absolute addresses (void *) -- I need...
Shaylynn asked 14/11, 2011 at 12:6
8
Solved
I am confused on how to separate implementation and declarations code of a simple class into a new header and cpp file. For example, how would I separate the code for the following class?
class A2...
Serge asked 6/3, 2012 at 8:5
2
Solved
I have a function like this:
void f(std::ofstream& ostrm)
{
auto a = Myglobal->getData1();
ostrm << a;
auto b = Myglobal->getData2();
ostrm << b;
auto c = Myglobal->...
Turney asked 17/10, 2019 at 7:38
4
I've been writing C++ code for a while now, but there's something I've been wondering for some time, without being to find a clear answer.
My point here is the following: let's say I have a functi...
Analects asked 13/6, 2019 at 11:49
2
In Swift, an extension is a way to define members for classes after the fact. Or, you could say, it is (coming from a total newb) fancy way of composing a function:
extension Double {
var mm: Dou...
Salliesallow asked 8/5, 2016 at 20:51
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