Dhtml editor
Free javascript download
Declaration of a constant member of a class has changed from Managed Extensions for C++ to Visual C++ 2005.
Although static const integral members are still supported, their linkage attribute has changed. Their former linkage attribute is now carried in a literal integral member. For example, consider the following Managed Extensions class:
| В |  Copy Code |
|---|---|
public __gc class Constants {
public:
static const int LOG_DEBUG = 4;
}; | |
This generates the following underlying CIL attributes for the field (note the literal attribute):
| В | Copy Code |
|---|---|
.field public static literal int32 modopt([Microsoft.VisualC]Microsoft.VisualC.IsConstModifier) STANDARD_CLIENT_PRX = int32(0x00000004) | |
While this still compiles under the new syntax:
| В | Copy Code |
|---|---|
public ref class Constants {
public:
static const int LOG_DEBUGВ = 4;
}; | |
it no longer emits the literal attribute, and therefore is not viewed as a constant by the CLR runtime:
| В | Copy Code |
|---|---|
.field public static int32 modopt([Microsoft.VisualC]Microsoft.VisualC.IsConstModifier) STANDARD_CLIENT_PRX = int32(0x00000004) | |
In order to have the same inter-language literal attribute, the declaration should be changed to the newly supported literal data member, as follows,
| В | Copy Code |
|---|---|
public ref class Constants {
public:
literal int LOG_DEBUGВ = 4;
}; | |
See Also
