Enum Error 

pub enum Error {
    Parse {
        position: usize,
        message: String,
    },
    InvalidEscape {
        char: char,
        position: usize,
    },
    Unclosed {
        kind: &'static str,
        position: usize,
    },
    InvalidQuantifier {
        position: usize,
        message: String,
    },
    InvalidCharClass {
        position: usize,
        message: String,
    },
    InvalidFuzziness {
        position: usize,
        message: String,
    },
    InvalidBackreference {
        group: usize,
        position: usize,
        message: String,
    },
    EmptyPattern,
    TooComplex {
        message: String,
    },
    Timeout {
        duration: Duration,
    },
}

The main error type for fuzzy regex operations.

Variants

Parse

Error during pattern parsing.

Fields

position: usize

Byte position in the pattern where the error occurred.

message: String

Description of the parse error.

InvalidEscape

Invalid escape sequence.

Fields

char: char

The invalid escape character.

position: usize

Byte position in the pattern where the invalid escape occurred.

Unclosed

Unclosed group or bracket.

Fields

kind: &'static str

The kind of unclosed delimiter (e.g., “group”, “bracket”).

position: usize

Byte position in the pattern where the unclosed delimiter starts.

InvalidQuantifier

Invalid quantifier.

Fields

position: usize

Byte position in the pattern where the invalid quantifier occurred.

message: String

Description of why the quantifier is invalid.

InvalidCharClass

Invalid character class.

Fields

position: usize

Byte position in the pattern where the invalid character class occurred.

message: String

Description of why the character class is invalid.

InvalidFuzziness

Invalid fuzziness specification.

Fields

position: usize

Byte position in the pattern where the invalid fuzziness specification occurred.

message: String

Description of why the fuzziness specification is invalid.

InvalidBackreference

Invalid backreference.

Fields

group: usize

The backreference group number that is invalid.

position: usize

Byte position in the pattern where the invalid backreference occurred.

message: String

Description of why the backreference is invalid.

EmptyPattern

Empty pattern where one was required.

TooComplex

Pattern too complex (e.g., too many states).

Fields

message: String

Description of why the pattern is too complex.

Timeout

Match operation timed out.

Fields

duration: Duration

The timeout duration that was exceeded.

Implementations

impl Error

pub fn parse(position: usize, message: impl Into<String>) -> Self

Create a parse error at a given position.

pub fn invalid_escape(char: char, position: usize) -> Self

Create an invalid escape error.

pub fn unclosed(kind: &'static str, position: usize) -> Self

Create an unclosed delimiter error.

pub fn invalid_quantifier(position: usize, message: impl Into<String>) -> Self

Create an invalid quantifier error.

pub fn invalid_char_class(position: usize, message: impl Into<String>) -> Self

Create an invalid character class error.

pub fn invalid_fuzziness(position: usize, message: impl Into<String>) -> Self

Create an invalid fuzziness error.

pub fn invalid_backreference( group: usize, position: usize, message: impl Into<String>, ) -> Self

Create an invalid backreference error.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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, __formatter: &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.

impl PartialEq for Error

fn eq(&self, other: &Error) -> 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 Eq for Error

impl StructuralPartialEq for Error