Struct DeltaMessage 

pub struct DeltaMessage {
    pub role: Option<String>,
    pub content: Option<String>,
    pub reasoning_content: Option<String>,
    pub tool_calls: Option<Vec<DeltaToolCall>>,
}

Incremental message body in a streaming response

Fields

role: Option<String>

Role (present on first occurrence)

content: Option<String>

Content delta

reasoning_content: Option<String>

Reasoning content delta (thinking process from models like Qwen3/DeepSeek)

tool_calls: Option<Vec<DeltaToolCall>>

Tool call delta

Trait Implementations

impl Clone for DeltaMessage

fn clone(&self) -> DeltaMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeltaMessage

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

Formats the value using the given formatter.

impl Default for DeltaMessage

fn default() -> DeltaMessage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DeltaMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.