Re: sizeof() struct w/ nested enum returns wrong size
homerjsimpson742@live.com wrote:
I have the following situation compiling using Visual Studio 2003:
#include "stdafx.h"
#include <iostream>
#include <limits>
namespace Outer{
class Xyz {
public:
typedef struct {
enum { classConstant1 = 0x0001,
classConstant2 = 0x0002,
ForceSize2Bytes = 0x7FFF
}; // end enum
} Constants; // end struct
}; // end class Xyz
} // end namespace Outer
int _tmain(int argc, _TCHAR* argv[])
{
std::cout << "The sizeof() Outer::Xyz::Constants = "
<< sizeof(Outer::Xyz::Constants)
<< std::endl;
std::cout << "Outer::Xyz::Constants::ForceSize2Bytes = 0x"
<< std::hex
<< Outer::Xyz::Constants::ForceSize2Bytes
<< std::endl;
std::cin.ignore((std::numeric_limits<std::streamsize>::max()),
'\n');
return 0;
} // end main()
Here's the output:
The sizeof() Outer::Xyz::Constants = 1
Outer::Xyz::Constants::ForceSize2Bytes = 0x7fff
The struct size is reported as one while the cosntants clearly output
a 2 byte value.
Does anyone knwo what's going one?
sizeof(Outer::Xyz::Constants) is the size of an *instance* of type
Constants, not the size of the static data.
Thanks, HJS
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