I/O control command requirements

A type X meets the IoControlCommand requirements if it satisfies the requirements listed below.

In the table below, a denotes a (possibly const) value of type X, and b denotes a value of type X.

Table 20. IoControlCommand requirements for extensible implementations

expression	type	assertion/note pre/post-conditions
`a.name()`	`int`	Returns a value suitable for passing as the request argument to POSIX `ioctl()` (or equivalent).
`b.data()`	`void*`