Except as described below, a constant expression is value-dependent if any subexpression is value-dependent.
An id-expression is value-dependent if:
it is a name declared with a dependent type,
it is the name of a non-type template parameter,
it names a member of an unknown specialization,
it names a static data member that is a dependent member of the current instantiation and is not initialized in a member-declarator,
it names a static member function that is a dependent member of the current instantiation, or
it is a constant with literal type and is initialized with an expression that is value-dependent.
Expressions of the following form are value-dependent if the unary-expression or expression is type-dependent or the type-id is dependent:
sizeof unary-expression sizeof ( type-id ) typeid ( expression ) typeid ( type-id ) alignof ( type-id ) noexcept ( expression )
[ Note: For the standard library macro offsetof, see [support.types]. — end note ]
Expressions of the following form are value-dependent:
sizeof ... ( identifier )
An expression of the form &qualified-id where the qualified-id names a dependent member of the current instantiation is value-dependent.
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