This struct should be specialized for third‐party types that need to expose "nullable" behavior. See the component‐level documentation for further information.

Synopsis

Declared in <bdlat_nullablevaluefunctions.h>

template<class TYPE>
struct IsNullableValue
    : bsl::false_type

Base Classes

Name

Description

bsl::false_type

Metafunction representing the boolean constant false.

Specializations

Name

IsNullableValue<bdlar::NullableValueConstRef>

IsNullableValue<bdlar::NullableValueRef>

IsNullableValue<bdlb::NullableAllocatedValue<TYPE>>

IsNullableValue<bdlb::NullableValue<TYPE>>

Derived Classes

Name

Description

IsNullable

Meta‐function indicating whether the specified t_TYPE is a nullable value type.

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