Struct Message 

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

A message in a conversation.

Messages are the core unit of communication in chat applications.

Fields

role: String

The role of the message sender (e.g., “user”, “assistant”, “system”)

content: String

The content of the message

name: Option<String>

Optional message name/identifier

tool_calls: Option<Vec<ToolCall>>

Optional function/tool call information

tool_call_id: Option<String>

Optional tool call ID (for tool responses)

metadata: HashMap<String, Value>

Additional metadata

Implementations

impl Message

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

Create a new user message

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

Create a new assistant message

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

Create a new system message

pub fn tool(content: impl Into<String>, tool_call_id: impl Into<String>) -> Self

Create a new tool message (response from a tool)

pub fn with_tool_calls(self, tool_calls: Vec<ToolCall>) -> Self

Add tool calls to this message

pub fn with_name(self, name: impl Into<String>) -> Self

Add a name to this message

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

Formats the value using the given formatter.

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

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::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::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Message