These allocator‐extended constructors cannot be called, and are provided only to prevent compilation errors when 'optional' is explicitly instantiated.

Synopsis

Declared in <bslstl_optional.h>

Optional_Base(
    std::allocator_arg_t allocatorArg,
    AllocType allocator);

Parameters

Name

Description

allocatorArg

tag selecting the allocator‐extended constructor

allocator

allocator used to supply memory

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