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mancubit

aggregate initialization list in class definition

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Maybe someone can help me with this: i want to define a constant array using a aggregate initialization list within the class definition in C++

normally an aggregation list can be used like this

[code]
const int i[] = { 1, 2, 3, 4 };
[/code]

in a class definition you have to use the static keyword - but the following does not work

[code]
static const int i[] = { 1, 2, 3, 4 };
[/code]

i am getting errors like "error C2059: syntax error : '{'", "error C2334: unexpected token(s) preceding '{'; skipping apparent function body"
for some reason the compiler thinks this aggregate is actually a function.

how can i do this correctly and why is it not working?

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Static variables must be initialized outside of the class definition, like this:


[code]#include <iostream>
using namespace std;

class A
{
public:
static const int i[];
};

const int A::i[] = {1, 2, 3, 4};

int main()
{
cout << A::i[0] << endl;
return 0;
}[/code]

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[quote name='greggles' timestamp='1306337815' post='4815626']
Static variables must be initialized outside of the class definition, like this:


[code]#include <iostream>
using namespace std;

class A
{
public:
static const int i[];
};

const int A::i[] = {1, 2, 3, 4};

int main()
{
cout << A::i[0] << endl;
return 0;
}[/code]
[/quote]

thank you!
i was just wondering as this works within the class definition

[code]
static const int i = 1;
[/code]

but seems like aggregates need special handling in this case..

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Integral types are an exception to this rule. Some compilers might have extensions allowing you to define static const floats (or other types) inline.

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[quote name='rip-off' timestamp='1306338559' post='4815630']
Integral types are an exception to this rule. Some compilers might have extensions allowing you to define static const floats (or other types) inline.
[/quote]

ah - thanks for clarification :)

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