Struct MessageStartEventMessage 

pub struct MessageStartEventMessage {
    pub id: String,
    pub type: MessageStartEventMessageType,
    pub role: MessageStartEventMessageRole,
    pub content: Vec<ContentBlock>,
    pub model: Model,
    pub stop_reason: Option<StopReason>,
    pub stop_sequence: Option<String>,
    pub usage: Usage,
}

message_start 事件携带的 Message 体；与 /v1/messages 同步返回的 Message 几乎相同，但 content 总是空数组（在后续 content_block_* 事件里逐步填充），且 stop_reason / stop_details / stop_sequence 为 null。usage 在此事件里只有 input_tokens / output_tokens 是 有效的，其余字段在 message_delta 时再补。

Fields

id: String

type: MessageStartEventMessageType

role: MessageStartEventMessageRole

content: Vec<ContentBlock>

model: Model

stop_reason: Option<StopReason>

stop_sequence: Option<String>

usage: Usage

Trait Implementations

impl Clone for MessageStartEventMessage

fn clone(&self) -> MessageStartEventMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MessageStartEventMessage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MessageStartEventMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MessageStartEventMessage

fn eq(&self, other: &MessageStartEventMessage) -> 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 MessageStartEventMessage

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 MessageStartEventMessage