Struct Message 

pub struct Message {
    pub role: Role,
    pub content: String,
    pub name: Option<String>,
    pub tool_calls: Option<Vec<ToolCall>>,
    pub tool_call_id: Option<String>,
}

A single message in a conversation.

Fields

role: Role

The role of the message sender.

content: String

The text content of the message.

For assistant messages that contain only tool calls, this may be empty.

name: Option<String>

Optional name used to distinguish multiple participants of the same role.

tool_calls: Option<Vec<ToolCall>>

Tool calls requested by the assistant, if any.

Present on messages with role = Assistant when the model wants to invoke one or more tools.

tool_call_id: Option<String>

The tool-call ID this message is responding to.

Must be set on messages with role = Tool so the provider can correlate the result with the originating call.

Implementations

impl Message

pub fn system(content: impl Into<String>) -> Message

Create a system message.

pub fn user(content: impl Into<String>) -> Message

Create a user message.

pub fn assistant(content: impl Into<String>) -> Message

Create an assistant message.

pub fn tool_result( content: impl Into<String>, tool_call_id: impl Into<String>, ) -> Message

Create a tool-result message.

tool_call_id must match the id of the ToolCall being answered.

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Message

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

fn deserialize<__D>( __deserializer: __D, ) -> Result<Message, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Message

fn eq(&self, other: &Message) -> 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 Serialize for Message

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Message