last_is

[last_is( limited-expression-list )]

limited-expression-list

Specifies one or more C-language expressions. Each expression evaluates to an integer that represents the array index of the last array element to be transmitted. The MIDL compiler supports conditional expressions, logical expressions, relational expressions, and arithmetic expressions. MIDL does not allow function invocations in expressions and does not allow increment and decrement operators. Separate multiple expressions with commas.

Example

proc1(

    [in] short Last,

    [in, last_is(Last)] short asNumbers[MAXSIZE]);

Remarks

The field attribute last_is specifies the index of the last array element to be transmitted. When the specified index is zero or negative, no array elements are transmitted.

The last_is attribute determines the value of the array index corresponding to the length_is attribute when length_is is not specified. The relationship between these array indexes is as follows:

length = last - first + 1

If the value of the array index specified by first_is is larger than the value specified by last_is, zero elements are transmitted.

The last_is attribute cannot be used as a field attribute at the same time as the length_is attribute or the string attribute.

Using a constant expression with the last_is attribute is an inappropriate use of the attribute. It is legal, but inefficient, and will result in slower marshalling code.

When the value specified by max_is is equal to or greater than zero, the following relationship must be true:

0 <= last_is <= max_is

See Also