Enum SessionError 

#[non_exhaustive]
pub enum SessionError {
    Compile(CompileError),
    Matcher(MatcherError),
    Structured(StructuredMatcherError),
    IllegalToken {
        token: TokenId,
    },
    UnknownToken {
        token: TokenId,
    },
    SessionStopped,
    MaskBufferLength {
        expected: usize,
        actual: usize,
    },
    MaskByteBufferLength {
        expected: usize,
        actual: usize,
    },
    MaskWidthOverflow {
        mask_vocab_size: usize,
    },
}

Errors from binding a schema or driving a Session.

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.

Compile(CompileError)

Schema compilation or artifact-binding failed.

Matcher(MatcherError)

The regular-backend matcher rejected a token.

Structured(StructuredMatcherError)

The structured-backend matcher hit a resource limit or a compile error.

IllegalToken

A token was rejected: no path from the current position (either backend).

Fields

token: TokenId

The rejected token id.

UnknownToken

advance was given a token id absent from the bound vocabulary.

Fields

token: TokenId

The unrecognized token id.

SessionStopped

advance was called on a session that already committed EOS; call reset() first.

MaskBufferLength

write_mask’s output buffer length did not match the vocabulary’s word count.

Fields

expected: usize

The required length, in u32 words.

actual: usize

The length the caller actually supplied.

MaskByteBufferLength

write_mask_le_bytes’s output buffer length did not match the vocabulary’s byte width.

Fields

expected: usize

The required length, in bytes.

actual: usize

The length the caller actually supplied.

MaskWidthOverflow

The vocabulary is too wide for its packed mask to be addressed on this target.

Fields

mask_vocab_size: usize

The vocabulary width whose byte length overflowed usize.

Trait Implementations

impl Debug for SessionError

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

Formats the value using the given formatter.

impl Display for SessionError

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

Formats the value using the given formatter.

impl Error for SessionError

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.

impl From<CompileError> for SessionError

fn from(e: CompileError) -> Self

Converts to this type from the input type.

impl From<MatcherError> for SessionError

fn from(e: MatcherError) -> Self

Converts to this type from the input type.

impl From<StructuredMatcherError> for SessionError

fn from(e: StructuredMatcherError) -> Self

Converts to this type from the input type.