Return the underlying value, or default_value if null.

Synopsis

Declared in <bdlb_nullablevalueref.h>

template<class ANY_TYPE>
TYPE
value_or(ANY_TYPE const& default_value) const;

Description

Return the value of the underlying object of a (template parameter) TYPE if the target is non‐null, and the specified default_value otherwise. Note that this method returns by value, so may be inefficient in some contexts.

Return Value

underlying value, or default_value if null

Parameters

Name

Description

default_value

fallback when the target is null

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