* `F` denotes a type that meets the requirements of [*Fields]. * `W` denotes a type meeting the requirements of __FieldsWriter__. * `a` denotes a value of type `F`. * `c` denotes a (possibly const) value of type `F`. * `b` is a value of type `bool` * `n` is a value of type `boost::optional<std::uint64_t>`. * `s` is a value of type [link beast.ref.boost__beast__string_view `string_view`]. * `v` is a value of type `unsigned int` representing the HTTP-version.
* `F` denotes a type that meets the requirements of [*Fields]. * `W` denotes a type meeting the requirements of __FieldsWriter__. * `a` denotes a value of type `F`. * `c` denotes a (possibly const) value of type `F`. * `b` is a value of type `bool` * `n` is a value of type `boost::optional<std::uint64_t>`. * `s` is a value of type [link beast.ref.boost__beast__string_view `string_view`]. * `v` is a value of type `unsigned int` representing the HTTP-version.
* `W` denotes a type meeting the requirements of __FieldsWriter__.
* `a` denotes a value of type `F`.
* `c` denotes a (possibly const) value of type `F`.
* `b` is a value of type `bool`
* `n` is a value of type `boost::optional<std::uint64_t>`.
* `s` is a value of type [link beast.ref.boost__beast__string_view `string_view`].
* `v` is a value of type `unsigned int` representing the HTTP-version.
* `W` denotes a type meeting the requirements of __FieldsWriter__.
* `a` denotes a value of type `F`.
* `c` denotes a (possibly const) value of type `F`.
* `b` is a value of type `bool`
* `n` is a value of type `boost::optional<std::uint64_t>`.
* `s` is a value of type [link beast.ref.boost__beast__string_view `string_view`].
* `v` is a value of type `unsigned int` representing the HTTP-version.