bsl::variant::variant

Create a variant object holding the 0th alternative, which is value‐initialized. If this variant is allocator‐aware, the specified allocator is used to supply memory. This constructor participates in overload resolution only if the 0th alternative is default constructible.

Synopsis

Declared in <bslstl_variant.h>

template<class t_FIRST = t_HEAD>
requires std::is_default_constructible<t_FIRST>::value
variant(
    std::allocator_arg_t,
    allocator_type allocator);

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