Enum ResponseFormat 

pub enum ResponseFormat {
    Text,
    JsonObject,
    JsonSchema(String),
}

Response format for structured output. Mirrors OpenAI’s response_format API — no proprietary extensions.

• Text: no constraint (default)
• JsonObject: output must be a valid JSON object (matches OpenAI’s {"type": "json_object"})
• JsonSchema(schema): output must conform to the given JSON Schema (matches OpenAI’s {"type": "json_schema", "json_schema": {...}}). Internally compiled to a regex FSM for per-token hard masking.

Variants

Text

No constraint — raw text output.

JsonObject

Output must be a valid JSON object.

JsonSchema(String)

Output must conform to the given JSON schema (as a JSON string).

Trait Implementations

impl Clone for ResponseFormat

fn clone(&self) -> ResponseFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResponseFormat

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

Formats the value using the given formatter.

impl Default for ResponseFormat

fn default() -> ResponseFormat

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ResponseFormat

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ResponseFormat

impl PartialEq for ResponseFormat

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ResponseFormat

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 ResponseFormat