Enum Message 

pub enum Message {
    User(UserMessage),
    Assistant(AssistantMessage),
    ToolResult(ToolResultMessage),
}

统一消息枚举 — 对话历史中的一条消息。

使用角色特化的变体，编译期保证类型安全：

• User — 用户输入（文本或多模态）
• Assistant — LLM 回复（文本、推理、工具调用）
• ToolResult — 工具执行结果

System prompt 不在此枚举中，它属于请求级别。

Variants

User(UserMessage)

Assistant(AssistantMessage)

ToolResult(ToolResultMessage)

Implementations

impl Message

pub fn role(&self) -> Role

返回消息的角色。

pub fn id(&self) -> &MessageId

返回消息的唯一标识。

pub fn timestamp(&self) -> DateTime<Utc>

返回消息的时间戳。

impl Message

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

创建一个纯文本 User 消息。

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

创建一个纯文本 Assistant 消息（用于测试或合成消息）。

pub fn tool_result( tool_call_id: ToolCallId, tool_name: impl Into<String>, content: impl Into<String>, is_error: bool, ) -> Self

创建一个工具结果消息。

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