Emplace a value constructed from args into the target.
Synopsis
Declared in <bdlb_nullablevalueref.h>
template<class... ARGS>
TYPE&
emplace(ARGS&&... args);Description
Assign to the target the value of the (template parameter) TYPE created in place using the specified args and return a reference providing modifiable access to the underlying TYPE object. If this optional object already contains an object (true == hasValue()), that object is destroyed before the new object is created. Note that if the constructor of TYPE throws an exception this object is left in a disengaged state.
Return Value
modifiable reference to the underlying TYPE object
Parameters
Name |
Description |
args |
constructor arguments for |
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