bsl::optional::optional

Assign a new value to this optional.

Synopsis

Declared in <bslstl_optional.h>

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

Description

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

initializer list forwarded to construct the contained value

args

arguments forwarded to construct the contained value

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