range (C++)

Specifies a range of allowable values for arguments or fields whose values are set at run time.

Syntax

[ 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

For more information about the attribute contexts, see Attribute Contexts.

See also

IDL Attributes
Method Attributes
Parameter Attributes
Data Member Attributes