Enum Role 

pub enum Role {
    System,
    User,
    Assistant,
    Developer,
    Tool,
}

OpenAI-compatible message role.

Serialises to lowercase strings ("system", "user", "assistant", "developer", "tool").

Variants

System

System-level instructions that set the model’s behavior and constraints.

User

Messages from the human user (questions, commands, feedback).

Assistant

Responses generated by the assistant/model.

Developer

Developer-level system messages (OpenAI-specific; hidden from the model’s view in some providers).

Tool

Results returned by tool execution, linked back to an assistant’s ToolCall via tool_call_id.

Trait Implementations

impl Clone for Role

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Role

impl Debug for Role

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Role

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Role

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

Formats the value using the given formatter.

impl Eq for Role

impl FromStr for Role

type Err = ParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Role, <Self as FromStr>::Err>

Parses a string s to return a value of this type.

impl PartialEq for Role

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Role

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 Role

impl TryFrom<&str> for Role

type Error = ParseError

The type returned in the event of a conversion error.

fn try_from(s: &str) -> Result<Role, <Self as TryFrom<&str>>::Error>

Performs the conversion.