range (C++)
Specifies a range of allowable values for arguments or fields whose values are set at run time.
[ range(
low,
high
) ]
Parameters
low
The low range value.high
The high range value.
Remarks
The range C++ attribute has the same functionality as the range MIDL attribute.
Example
// cpp_attr_ref_range.cpp
// compile with: /LD
#include <unknwn.h>
[module(name="MyLib")];
[object, uuid("9E66A290-4365-11D2-A997-00C04FA37DDB")]
__interface ICustom {
HRESULT Custom([in] long l, [out, retval] long *pLong);
HRESULT length_is1([in, range(0, 999)] long f, [in, length_is(f)] char array[10]);
HRESULT length_is2([in, range(-99, -1)] long f, [in, length_is("f"), size_is(10)] char *array);
};
Requirements
Attribute Context
Applies to |
Interface method, interface parameter |
Repeatable |
No |
Required attributes |
None |
Invalid attributes |
None |
For more information about the attribute contexts, see Attribute Contexts.