Struct ChatMessage 

pub struct ChatMessage {
    pub role: MessageRole,
    pub content: String,
    pub reasoning: Option<String>,
    pub name: Option<String>,
    pub tool_calls: Option<Vec<ChatToolCall>>,
    pub tool_call_id: Option<String>,
    pub function_call: Option<ChatFunctionCall>,
}

Chat message

Fields

role: MessageRole

Message role

content: String

Message content. Accepts either a plain string or the OpenAI “typed parts” array form ([{"type":"text","text":"..."}]) — both shapes deserialize into a single String. Non-text parts fail deserialization so multimodal input is rejected instead of silently dropped.

reasoning: Option<String>

vLLM-compatible parsed reasoning text. When Ferrum parses <think>...</think>, content contains only the final visible answer and this field contains the reasoning block text. Historical input also accepts reasoning_content. A string in reasoning takes precedence, including an empty string; missing or null reasoning falls back to the alias. Output uses only reasoning.

name: Option<String>

Message name (for function calls)

tool_calls: Option<Vec<ChatToolCall>>

Assistant tool calls.

tool_call_id: Option<String>

Tool response correlation id.

function_call: Option<ChatFunctionCall>

Legacy assistant function call.

Trait Implementations

impl Clone for ChatMessage

fn clone(&self) -> ChatMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChatMessage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ChatMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ChatMessage

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.