Enum trick in C++/CLI
In native C++ we could use enum trick in class definition:
namespace EFoo
{
enum { a = 10; };
}
class Foo
{
// Declare an array of 10 integers.
int m_Arr[EFoo::a];
};
However, with managed enum in C++/CLI,
开发者_如何转开发public enum class EFoo
{
a = 10,
};
EFoo::a couldn't be converted implicitly to int, so the enum trick wouldn't be allowed.
Is there any workaround?
Thanks.
If you are just trying to achieve the 'enum
hack', you should not have to do that in any recent compiler, as they will support static const
member declarations.
class Foo
{
private:
static const int ARRAY_SIZE = 10;
int m_arr[ARRAY_SIZE];
};
Otherwise, doing an int
cast like Jonathan Wood answered would work to change from a managed enum
to an int
.
Try:
arr[(int)EFoo.a];
If you dont need the enacpsulation, why not declare it as an "enum" instead of the "enum class"? You can then use it without the cast, and also, without the classname .
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