Struct ChatTemplateState 

pub struct ChatTemplateState { /* private fields */ }

Chat template state that can be embedded in any tokenizer struct. Eliminates duplicated apply/set/format methods across tokenizer backends.

The compiled minijinja::Environment (with the template parsed, filters registered, and Python-compat callback installed) is cached so that apply() only performs rendering – no parsing or environment setup. The cache is rebuilt whenever set() is called.

Environment<'static> is both Send and Sync, so embedding this in tokenizer structs shared across threads is safe.

Implementations

impl ChatTemplateState

pub fn new(template: Option<String>) -> Result<Self>

pub fn empty() -> Self

Create a ChatTemplateState with no template set.

Unlike new(None), this is infallible since there is no template to parse — useful in constructors that don’t return Result.

pub fn apply( &self, messages: &[Value], params: ChatTemplateParams<'_>, ) -> Result<String>

pub fn set(&mut self, template: String) -> Result<()>

pub fn content_format(&self) -> ChatTemplateContentFormat

pub fn thinking_toggle(&self) -> ThinkingToggle

pub fn thinking_key_name(&self) -> Option<ThinkingKeyName>

pub fn think_in_prefill(&self) -> bool

Trait Implementations

impl Debug for ChatTemplateState

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

Formats the value using the given formatter.