Create a Variant_Base object holding the same alternative (if any) held by the specified original object.

Synopsis

Declared in <bslstl_variant.h>

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

Description

Create a Variant_Base object holding the same alternative (if any) held by the specified original object. If this Variant_Base is allocator‐aware, the specified allocator is used to supply memory. If the original object is not valueless by exception, the contained value is copy/move constructed from the contained value of original. All alternatives shall be copy/move constructible.

Parameters

Name

Description

allocatorArg

tag selecting the allocator‐extended overload

allocator

allocator used to supply memory

original

object to copy

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