or fields of variable size. Otherwise the size is <i>constant</i>.
Calls to <code>Alignof</code>, <code>Offsetof</code>, and <code>Sizeof</code>
are compile-time <a href="#Constant_expressions">constant expressions</a> of
type <code>uintptr</code> if their arguments (or the struct <code>s</code> in
the selector expression <code>s.f</code> for <code>Offsetof</code>) are types
of constant size.
</p>

<p>

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