Struct Message 

pub struct Message {
    pub role: Role,
    pub content: String,
    pub tool_call_id: Option<String>,
    pub tool_calls: Vec<ToolCall>,
    pub images: Vec<ImagePart>,
}

A chat message in the conversation history.

Fields

role: Role

content: String

tool_call_id: Option<String>

Tool call results (only for Role::Tool).

tool_calls: Vec<ToolCall>

Tool calls made by the assistant (only for Role::Assistant with function calling). Gemini API requires model turns to include functionCall parts.

images: Vec<ImagePart>

Inline images (for multimodal VLM input).

Implementations

impl Message

pub fn system(content: impl Into<String>) -> Self

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

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

pub fn assistant_with_tool_calls( content: impl Into<String>, tool_calls: Vec<ToolCall>, ) -> Self

Create an assistant message that includes function calls (for Gemini FC protocol).

pub fn tool(call_id: impl Into<String>, content: impl Into<String>) -> Self

pub fn tool_with_images( call_id: impl Into<String>, content: impl Into<String>, images: Vec<ImagePart>, ) -> Self

Tool result with inline images (for VLM — Gemini sees the images).

pub fn user_with_images( content: impl Into<String>, images: Vec<ImagePart>, ) -> Self

User message with inline images.

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.