bsl::optional::optional

Create an optional object having the value of the (template parameter) t_TYPE created in place using the specified args.

Synopsis

Declared in <bslstl_optional.h>

template<class... t_ARGS>
explicit
optional(
    std::allocator_arg_t allocatorArg,
    AllocType allocator,
    std::in_place_t inPlace,
    t_ARGS&&... args);

Description

Create an optional object having the value of the (template parameter) t_TYPE created in place using the specified args. Use the specified allocator to supply memory.

Parameters

Name

Description

allocatorArg

tag selecting the allocator‐extended constructor

allocator

allocator used to supply memory

inPlace

tag selecting in‐place construction of the contained value

args

arguments forwarded to construct the contained value

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