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##### http::parser::value_type

The type of message returned by the parser.

###### Synopsis

    using value_type = message< isRequest, Body, basic_fields< Allocator > >;

###### Types

Name | Description
--- | ---
body_type | The type providing the body traits.
fields_type | The type representing the fields.
header_type | The base class used to hold the header portion of the message.
is_request | Indicates if the header is a request or response.

###### Member Functions

Name | Description
--- | ---
base | Returns the header portion of the message.
body | Returns the body.
chunked | Returns true if the chunked Transfer-Encoding is specified. Set or clear the chunked Transfer-Encoding.
content_length | Set or clear the Content-Length field.
has_content_length | Returns true if the Content-Length field is present.
keep_alive | Returns true if the message semantics indicate keep-alive. Set the keep-alive message semantic option.
message | Constructor. Construct a message.
method | Return the request-method verb. Set the request-method.
method_string | Return the request-method as a string.
need_eof | Returns true if the message semantics require an end of file.
operator= | Assignment.
payload_size | Returns the payload size of the body in octets if possible.
prepare_payload | Prepare the message payload fields for the body.
reason | Return the response reason-phrase. Set the response reason-phrase (deprecated)
result | The response status-code result. Set the response status-code. Set the response status-code as an integer.
result_int | The response status-code expressed as an integer.
target | Returns the request-target string. Set the request-target string.
version | Return the HTTP-version. Set the HTTP-version.

This container is derived from the `Fields` template type. To understand all of the members of this class it is necessary to view the declaration for the `Fields` type. When using the default fields container, those declarations are in `http::fields`. A message can be a request or response, depending on the `isRequest` template argument value. Requests and responses have different types; functions may be overloaded based on the type if desired. The `Body` template argument type determines the model used to read or write the content body of the message. Newly constructed messages objects have version set to HTTP/1.1. Newly constructed response objects also have result code set to `http::ok`.

###### Template Parameters

Type | Description
--- | ---
`isRequest` | `true` if this represents a request, or `false` if this represents a response. Some class data members are conditionally present depending on this value.
`Body` | A type meeting the requirements of Body.
`Fields` | The type of container used to hold the field value pairs.

###### Description