Struct Content 

pub struct Content {
    pub parts: Vec<Part>,
    pub role: String,
}

The base structured datatype containing multi-part content of a message.

A Content includes a role field designating the producer of the Content and a parts field containing multi-part data that contains the content of the message turn.

Fields

parts: Vec<Part>

Ordered Parts that constitute a single message. Parts may have different MIME types.

role: String

Optional. The producer of the content. Must be either ‘user’ or ‘model’.

Useful to set for multi-turn conversations, otherwise can be left blank or unset.

Implementations

impl Content

pub fn new<I: IntoParts>(parts: I) -> Self

Creates new Content with the role set to “user”.

This is the standard way to represent a user’s prompt to the model. This method is an alias for Content::user.

Arguments

• parts - Any type that can be converted into a collection of Parts, such as a string, a Part, or a tuple of parts.

Example

// Create content from a simple string
let text_content = Content::new("Describe this image:");

// Create multi-part content from a tuple
let mixed_content = Content::new((
    "A photo of the beach.",
    Part::blob("image/png", vec![0u8; 1024])
));

pub fn user<I: IntoParts>(parts: I) -> Self

Creates new Content explicitly assigning it the “user” role.

User content represents the prompts and inputs you provide to the model. It’s the most common type of content you’ll create.

pub fn model<I: IntoParts>(parts: I) -> Self

Creates new Content explicitly assigning it the “model” role.

Model content represents the responses generated by the AI. It is primarily used to build and maintain a multi-turn conversation history.

Trait Implementations

impl Clone for Content

fn clone(&self) -> Content

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Content

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Content

fn default() -> Self

Returns the “default value” for a type.

impl Display for Content

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: IntoParts> From<T> for Content

fn from(parts: T) -> Self

Converts to this type from the input type.

impl IntoContent for Content

fn into_content(self) -> Content

impl Message for Content

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for Content

fn eq(&self, other: &Content) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryInto<Vec<u8>> for &Content

type Error = Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<Vec<u8>, Self::Error>

Performs the conversion.

impl StructuralPartialEq for Content