Enum Error 

pub enum Error {
    Syntax {
        msg: String,
        pos: Option<usize>,
    },
    Unsupported {
        construct: String,
        hint: String,
    },
}

Why a pattern failed to compile.

Variants

Syntax

A syntax error in the pattern, with the engine’s message and (when known) the byte position.

Fields

msg: String

pos: Option<usize>

Unsupported

A construct REAL does not support linearly (\p{…}, a backreference, an unbounded lookaround, …). hint points at the divergences page and the fallback feature — the error sells its own solution.

Fields

construct: String

hint: String

Implementations

impl Error

pub fn is_unsupported(&self) -> bool

Whether this is an unsupported-construct error (rather than a syntax 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, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Error

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

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Error