Enum Error 

#[non_exhaustive]
pub enum Error {
    TemplateRaised {
        message: String,
    },
    Compile(Error),
    Render(Error),
    Config(String),
    Hub(String),
}

Errors produced while compiling or rendering a chat template.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

TemplateRaised

The template deliberately called raise_exception(msg) — the input conversation was rejected by the template’s own validation (e.g. bad role alternation). Act on this; it is not a bug.

Fields

message: String

The message the template passed to raise_exception.

Compile(Error)

The Jinja source failed to compile (syntax error). Carries the underlying engine error.

Render(Error)

The template failed at render time (undefined variable, type error, unknown method…).

Config(String)

The tokenizer_config.json had no usable chat_template, or a requested named template was absent / the field had an unexpected shape.

Hub(String)

Fetching a file from the Hugging Face Hub failed (network, auth/gated repo, or the file is absent). Only present with the hub feature. Carries the underlying message; the hf-hub error type is deliberately kept out of our public API.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.