Invoke the specified accessor on the non‐modifiable value stored in the specified "nullable" object and on a prvalue of the category tag type for the dynamic category of the value. See {`bdlat_typecategory`|Category Tags and Enumerators} for documentation about category tags. Return the value from the invocation of accessor. The accessor must be an accessor functor. See {`bdlat_typecategory`|`ACCESSOR` Functors} for the requirements on accessor. The behavior is undefined if object contains a null value.

Synopsis

Declared in <bdlat_nullablevalueutil.h>

template<
    class TYPE,
    class ACCESSOR>
static
int
accessValueByCategory(
    TYPE const& object,
    ACCESSOR& accessor);

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