Struct Message 

pub struct Message {
    pub role: Option<String>,
    pub content: Option<MessageContent>,
    pub reasoning_content: Option<String>,
    pub audio: Option<AudioContent>,
    pub tool_calls: Option<Vec<ToolCallMessage>>,
}

Notes:

• Depending on the model/mode, only one of content, audio, or tool_calls may be set.
• Prefer content for final text; reasoning_content may contain internal traces (when available).

Assistant message payload

Fields

role: Option<String>

Role of the message, defaults to “assistant”

content: Option<MessageContent>

Current dialog content. If function/tool calling is used, this may be null; otherwise contains the inference result. For some models, content may include thinking traces within <think> tags, with final output outside.

reasoning_content: Option<String>

Reasoning chain content (only for specific models)

audio: Option<AudioContent>

Audio payload for voice models (glm-4-voice)

tool_calls: Option<Vec<ToolCallMessage>>

Generated tool/function calls

Implementations

impl Message

pub fn role(&self) -> Option<&str>

Role of the message (typically "assistant").

pub fn content(&self) -> Option<&MessageContent>

Dialog content (may include <think> traces for some models).

pub fn content_str(&self) -> Option<&str>

Return the assistant text when content is a JSON string; None otherwise (absent, null, or the array-of-parts form). Convenience over content for the common case where the model returns a plain string.

pub fn reasoning_content(&self) -> Option<&str>

Reasoning-chain content, when the model exposes it.

pub fn audio(&self) -> Option<&AudioContent>

Audio payload, for voice models.

pub fn tool_calls(&self) -> Option<&[ToolCallMessage]>

Tool/function calls the model wants the caller to execute.

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 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 Validate for Message

fn validate(&self) -> Result<(), ValidationErrors>

impl<'v_a> ValidateArgs<'v_a> for Message

type Args = ()

fn validate_with_args(&self, args: Self::Args) -> Result<(), ValidationErrors>