bsl::variant::variant

Create a variant object holding a moved copy of original's alternative using allocator.

Synopsis

Declared in <bslstl_variant.h>

template<class t_FIRST = t_HEAD>
requires BloombergLP::bslstl::
                Variant_IsMoveConstructibleAll<t_FIRST, t_TAIL...>::value
variant(
    std::allocator_arg_t allocatorArg,
    allocator_type allocator,
    variant&& original);

Description

Create a variant object holding the same alternative (if any) held by the specified original. If this variant is allocator‐aware, the specified allocator is used to supply memory. If original is not valueless by exception, the contained value is move‐constructed from the contained value of original. This constructor participates in overload resolution only if all alternatives are move constructible.

Parameters

Name

Description

allocatorArg

tag selecting the allocator‐extended overload

allocator

allocator used to supply memory

original

variant to move from

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