Questions tagged [member-initialization]
121 questions
5
votes
3 answers
Initializer list syntax in member initializer list using C++11
I've been going through 'A Tour of C++' and Bjarne uses the the c++11 initializer list feature in member initialization in a constructor, like so (using curly brackets):
A a;
B b;
Foo(Bar bar):
a{bar.a}, b{bar.b}
{}
This, however doesn't compile…
G.Rassovsky
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5
votes
4 answers
Is there an Objective-C/C++ equivalent to C#'s member brace-initialization capability?
In addition to 'var' (see my other post here), one of the things I really like about C# is that I can both declare, then initialize members of a class using braces, like this...
var reallyLongFooVarName = new ReallyLongFooClassName(){
Name =…
Mark A. Donohoe
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5
votes
5 answers
Illegal Member initialization
I am using this pretty simple class without using any inheritance.
class A
{
int a;
int b;
public:
A(int x, int y) { a = x; b = y;}
A() :A(0,0){};
~A(){};
} ;
int main ()
{
A a1, a2(5, 7) ;
}
I get this error.
error C2614: 'A' : illegal…
Coding Mash
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5
votes
1 answer
Clang++ Xcode 4.4 Non Static Member Initialization and Move constructor
I am using Xcode 4.4 with mountain lion. I can't seems to understand why non-static member initalization in templates invokes a move constructor for the variable. Is there anyway to overcome this error?
Example Code:
#include
#include…
user1555676
- 53
- 2
4
votes
1 answer
C++0x Member initialization without a constructor
In N3257 I found an example using initializing members without a constructor, which is fine. I guess that is possible, because it is a POD.
template
struct adaptor {
NonStdContainer* ptr; // <- data member
T*…
towi
- 21,587
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4
votes
2 answers
Initializing from a pair in constructur intializer list
I have a function f returning a pair of objects of classes A and B:
auto f() -> std::pair;
Furthermore, I have a class C that has A and B as members:
class C {
public:
C();
private:
A a;
B b;
};
In the constructor of C, I want…
Henk
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4
votes
2 answers
Memberwise Initialization
Possible Duplicate:
C++ initialization lists
What is the difference between member-wise initialization and direct initialization in a class?
What is the difference between the two constructors defined in the class?
class A
{
public:
int…
cppcoder
- 22,227
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4
votes
2 answers
How do I forward the values of tuple to a member initializer?
I need to forward the values of a tuple to a member initializer:
struct Struct {
Member1 member1;
Member2 member2;
template
Struct( Tuple1&& tuple1, Tuple2&& tuple2 )
: member1(tuple1...),…
Helloer
- 417
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- 13
4
votes
2 answers
Is it allowed to call a non-static member function in a default member initializer?
Consider this class:
#include
struct foo {
int a = 42;
int b = bar();
int bar() { return a; }
};
int main(){
foo f;
std::cout << f.a << " " << f.b;
}
It prints the expected 42 42. Is it allowed by the standard to…
463035818_is_not_an_ai
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4
votes
3 answers
Why use member init lists if there is default member initialization
In C++11, default member initialization was introduced.
So, I just wanted to ask that why member initializer lists must still be employed in favour of these?
E.g.
If this is allowed
class apple
{
int i = 10;
};
Why should this be used
class…
Gaurav Pant
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4
votes
3 answers
Order of member initializers
Following code gives correct output, If I declare variables i and j, Like int i, j;
class A
{
int i, j;
public:
A(int val) : i(val), j(i + 1)
{
cout<
msc
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4
votes
1 answer
Initialization of member: bug in GCC or my thinking?
I've got an enum type defined in the private section of my class. I have a member of this type defined as well. When I try to initialize this member in the constructor body, I get memory corruption problems at run-time. When I initialize it through…
San Jacinto
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4
votes
2 answers
Using std::function in member initialization list
I have a typedef:
typedef S32(iMyDataClass1::*getDataFunction_t)(void);
and a type:
struct functionMap_t {
std::vector pDataFunctionTable;
struct dataRequestor_t dataRequestor;
};
I then have a member…
Jeff Lamb
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4
votes
2 answers
Member initialization lists with default arguments
Is it possible use default arguments with member initialization lists?
Vector3::Vector3(double xI, double yI, double zI)
: x(xI=0), y(yI=0), z(zI=0)
{
}
The constructor always sets x, y, and z to 0 even if you call it with setting the arguments.
Daniel Node.js
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3
votes
2 answers
How do I set a default value for a class member with something other than its initializer list constructor
Let's say I have something like this:
class A
{
public:
A(int x, int y)
{
std::cout << "Constructed from parameters" << std::endl;
}
// Non-copyable, non-movable
A(A const&) = delete;
A(A&&) = delete;
A&…
Eternal
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