Struct Message 

pub struct Message {
    pub role: String,
    pub content: Option<Content>,
    pub tool_calls: Vec<Value>,
    pub extra: Map<String, Value>,
}

A single chat message. role is typed; content is string-or-parts; all other keys (name, tool_call_id, …) flow through extra.

Fields

role: String

"system" | "user" | "assistant" | "tool" | … — open by design.

content: Option<Content>

Message body: a plain string, or a list of multimodal parts. None omits the key entirely (faithful to messages that carry only tool_calls).

tool_calls: Vec<Value>

Assistant tool-call payloads, raw JSON (shape varies by model: function.arguments is sometimes a dict, sometimes a JSON string).

extra: Map<String, Value>

Any other per-message keys (name, tool_call_id, model-specific fields).

Implementations

impl Message

pub fn new(role: impl Into<String>, content: impl Into<String>) -> Self

Convenience constructor for the common {role, content: <text>} message.

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

A system message with text content. Shorthand for Message::new("system", text).

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

A user message with text content. Shorthand for Message::new("user", text).

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

An assistant message with text content. Shorthand for Message::new("assistant", text).

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 Default for Message

fn default() -> Message

Returns the “default value” for a type.

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 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.