BloombergLP::bslstl::Variant_Base::Variant_Base

Synopses

Declared in <bslstl_variant.h>

Create a Variant_Base object holding the 0th alternative, which is value-initialized. If this Variant_Base is allocator-aware, the currently installed default allocator is used to supply memory.

Variant_Base();

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

Variant_Base(Variant_Base const& original);

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

Variant_Base(Variant_Base&& original);

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Create a Variant_Base object whose index is the specified index without constructing an alternative object. If this Variant_Base is allocator-aware, the default allocator is used to supply memory.

Variant_Base(
    Variant_ConstructFromStdTag,
    size_t index);

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Create a Variant_Base object holding the 0th alternative, which is value-initialized. If this Variant_Base is allocator-aware, the specified allocator is used to supply memory.

Variant_Base(
    std::allocator_arg_t,
    allocator_type allocator);

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Create a Variant_Base object holding the alternative with index (template parameter) t_INDEX, direct-initialized from the specified args. If this Variant_Base is allocator-aware, the currently installed default allocator is used to supply memory.

template<
    size_t t_INDEX,
    class... t_ARGS>
explicit
Variant_Base(
    bsl::in_place_index_t<t_INDEX>,
    t_ARGS&&... args);

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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.

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

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See the corresponding copy constructor above.

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

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Create a Variant_Base object whose index is the specified index without constructing an alternative object. If this Variant_Base is allocator-aware, the specified allocator is used to supply memory.

Variant_Base(
    std::allocator_arg_t,
    allocator_type allocator,
    Variant_ConstructFromStdTag,
    size_t index);

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Create a Variant_Base object holding the alternative with index (template parameter) t_INDEX, direct-initialized from the specified args. If this Variant_Base is allocator-aware, the specified allocator is used to supply memory.

template<
    size_t t_INDEX,
    class... t_ARGS>
explicit
Variant_Base(
    std::allocator_arg_t,
    allocator_type allocator,
    bsl::in_place_index_t<t_INDEX>,
    t_ARGS&&... args);

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