static-members Questions
2
Solved
I'd like to have a base class that has a constant field (like an unique ID associated with the class that can't be modified after compile time). So far the static const declaration would be just fi...
Aetolia asked 6/6, 2012 at 13:50
6
Solved
void foo (int x)
{
struct A { static const int d = 0; }; // error
}
Other than the reference from standard, is there any motivation behind this to disallow static field inside an inner class ?
...
Mayo asked 26/5, 2011 at 10:48
1
Solved
Let's consider a code
header:
class uid
{
public:
uid () {++i; }
static int i;
};
class foo
{
public:
const static uid id;
}
source:
static int uid::i = 0;
The header could be included ...
Amaryllidaceous asked 13/5, 2020 at 18:13
6
Solved
Either I'm very tired or something weird is happening that I'm not aware of, because the code below is resulting in undefined symbols for Foo::A and Foo::B when linking. This is minimized as much a...
Mainly asked 3/2, 2011 at 20:3
2
Solved
I know that the question has been asked several times and I've been reading posts like:
Initializing static members of a templated class
How can I Declare/define/initialize a static member variab...
Esquiline asked 27/10, 2019 at 20:21
5
Solved
Recently tried the following program and it compiles, runs fine and produces expected output instead of any runtime error.
#include <iostream>
class demo
{
public:
static void fun()
{
st...
Forficate asked 12/2, 2015 at 16:34
3
We have two classifications heap and stack . When a object is created, memory for object is stored in heap. What if the class has static methods ,which can be called using class name. If object is ...
Gherlein asked 6/10, 2011 at 11:2
5
Solved
I have a class
class foo {
public:
foo();
foo( int );
private:
static const string s;
};
Where is the best place to initialize the string s in the source file?
Mcleroy asked 9/4, 2010 at 6:40
6
Solved
I want to have a static const char array in my class. GCC complained and told me I should use constexpr, although now it's telling me it's an undefined reference. If I make the array a non-member t...
Hookah asked 4/11, 2011 at 23:11
5
I want to write es6 class:
class SomeClass {
static prop = 123
method() {
}
}
How to get access to static prop from method() without use SomeClass explicitly? In es6 it can be done with this...
Pachydermatous asked 28/10, 2015 at 9:29
0
This one's a little weird/complex and more just curiosity than anything.
I was looking for a way to make sure static calls from a base class could safely use static information set up in a derived...
Dopester asked 21/3, 2019 at 22:12
7
Solved
Given is a class with a static member.
class BaseClass
{
public:
static std::string bstring;
};
String has obviously to be default-initialized outside of the class.
std::string BaseClass...
Guzzle asked 17/9, 2013 at 22:25
2
Solved
Given the following code:
#include <iostream>
template <std::size_t N>
struct foo
{ static std::size_t value; };
template <>
std::size_t foo<0>::value = 0u;
template &l...
Sulfonmethane asked 4/3, 2019 at 11:7
3
Solved
What is the best way to have a static member in a non-templated library class,
without placing the burden of defining the member on the class user?
Say I want to provide this class:
class i...
Cordovan asked 29/7, 2012 at 14:6
2
Solved
I have an expensive function like this:
pub fn get_expensive_value(n: u64): u64 {
let ret = 0;
for 0 .. n {
// expensive stuff
}
ret
}
And it gets called very frequently with the same argumen...
Wadi asked 26/3, 2016 at 2:16
1
Solved
struct sa
{
struct sb { int a = 123;};
inline static sb b;
};
The above code generates an error:
main.cpp:25:20: error: default member initializer for ‘sa::sb::a’ required before the end of it...
Sweepstakes asked 22/8, 2018 at 2:32
11
Solved
I'd like to have a private static constant for a class (in this case a shape-factory).
I'd like to have something of the sort.
class A {
private:
static const string RECTANGLE = "rectangle&q...
Abseil asked 14/10, 2009 at 2:0
2
Solved
Is the following code valid, e.g. doesn't bring undefined behaviour?
struct S
{
int i = s.i;
static S s;
};
S S::s;
int main()
{
S a; // a.i = 0
S::s.i = 42;
S b; // b.i = 42
}
As far as ...
Groningen asked 2/8, 2018 at 13:49
3
Solved
I'd like to do this:
template <typename T>
struct S
{
...
static double something_relevant = 1.5;
};
but I can't since something_relevant is not of integral type. It doesn't depend on T,...
Selden asked 12/7, 2010 at 15:45
6
Solved
Given an hypothetical utility class that is used only in program setup:
class MyUtils {
private static MyObject myObject = new MyObject();
/*package*/static boolean doStuff(Params... params) {
...
Billiards asked 17/1, 2009 at 9:2
9
Solved
I just did a little experiment:
public abstract class MyClass
{
private static int myInt = 0;
public static int Foo()
{
return myInt;
}
public static int Foo(int n)
{
myInt = n;
return ...
Diahann asked 13/5, 2011 at 0:31
3
Solved
I am trying to access a static member from a non-static function in the class, and I get an error saying
Static member cannot be accessed off an instance variable
this is how my code looks -
...
Oballa asked 19/3, 2014 at 19:33
7
Solved
I've recently made a change stylistically and wanted to see how other c++ programmers felt about it and if there were any downsides to it.
Essentially, when I needed a utility function which doesn...
Smoking asked 6/7, 2011 at 14:40
4
Solved
I am new to C++.
I have a class like this:
class CodeTest
{
private:
static const int TOTAL=100;
};
Is TOTAL a declaration or a definition?
When I was reading Scott Meyer's book, it was mentio...
Gainor asked 24/6, 2012 at 14:52
2
Solved
I'm learning C++. The documentation learn.microsoft.com/en-us/cpp/cpp/member-access-control-cpp says:
When you specify a base class as private, it affects only nonstatic members. Public static m...
Logistic asked 27/11, 2017 at 8:55
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