field_kind

Represents the possible C++ types a field or field_view may have.

enum field_kind

Name	Description
`null`	Any of the below when the value is NULL.
`int64`	The field contains a `std::int64_t`.
`uint64`	The field contains a `std::uint64_t`.
`string`	The field contains a string (`std::string` for `field` and `string_view` for `field_view`).
`blob`	The field contains a binary string (`blob` for `field` and `blob_view` for `field_view`).
`float_`	The field contains a `float`.
`double_`	The field contains a `double`.
`date`	The field contains a `date`.
`datetime`	The field contains a `datetime`.
`time`	The field contains a `time`.

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