Enum PatternError 

#[non_exhaustive]
pub enum PatternError {
    ParseError {
        offset: usize,
        message: String,
    },
    UnsupportedEscape {
        offset: usize,
        escape: char,
    },
    RecursionLimit {
        limit: usize,
    },
    StateOverflow {
        limit: u32,
    },
    EmptyPatternSet,
}

Construction error shared across the pipeline.

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.

ParseError

Regex source contained a character outside the supported subset or a malformed sequence.

Carries the byte offset and a human-readable description. Every message starts with Fix: so consumers can surface the remediation directly to end users.

Fields

offset: usize

Byte offset at which the parser gave up.

message: String

Actionable Fix: prose describing what went wrong.

UnsupportedEscape

Regex source used an escape sequence reserved for regex shorthand or anchor semantics that this byte-oriented frontend does not implement.

Fields

offset: usize

Byte offset of the leading backslash.

escape: char

Escaped ASCII byte after the backslash.

RecursionLimit

Regex source exceeded the parser’s bounded recursive group nesting.

Fields

limit: usize

Maximum group nesting depth permitted.

StateOverflow

The NFA or DFA exceeded a configured state budget.

Fields

limit: u32

Maximum state count permitted.

EmptyPatternSet

The pattern set was empty or otherwise structurally invalid for composite assembly (e.g., mixing empty regex with literal patterns).

Trait Implementations

impl Clone for PatternError

fn clone(&self) -> PatternError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PatternError

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

Formats the value using the given formatter.

impl Display for PatternError

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

Formats the value using the given formatter.

impl Error for PatternError

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 PatternError

fn eq(&self, other: &PatternError) -> 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 PatternError

impl StructuralPartialEq for PatternError