datetime::datetime (4 of 4 overloads)

Constructs a datetime from a local_time_point.

constexpr
datetime(
    local_time_point tp);

Equivalent to constructing a date from a time_point with the same time_since_epoch() as tp.

Requires C++20 calendar types.

Strong guarantee. Throws on invalid input.

Type	Thrown On
`std::out_of_range`	If the resulting `datetime` object would be out of the [`min_datetime`, `max_datetime`] range.

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