Create an Optional_Base object.

Synopsis

Declared in <bslstl_optional.h>

Optional_Base(
    std::allocator_arg_t allocatorArg,
    allocator_type allocator,
    Optional_Base const& original);

Description

If the specified original contains a value, create an Optional_Base object whose contained value is initialized from *original. Otherwise, create a disengaged Optional_Base object. Use the specified allocator to supply memory.

Parameters

Name

Description

allocatorArg

tag selecting the allocator‐extended constructor

allocator

allocator used to supply memory

original

source optional used to initialize this object

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