Struct regex_syntax::ast::Error

pub struct Error { /* fields omitted */ }

An error that occurred while parsing a regular expression into an abstract syntax tree.

Note that note all ASTs represents a valid regular expression. For example, an AST is constructed without error for \p{Quux}, but Quux is not a valid Unicode property name. That particular error is reported when translating an AST to the high-level intermediate representation (HIR).

Methods

impl Error

pub fn kind(&self) -> &ErrorKind

Return the type of this error.

pub fn pattern(&self) -> &str

The original pattern string in which this error occurred.

Every span reported by this error is reported in terms of this string.

pub fn span(&self) -> &Span

Return the span at which this error occurred.

pub fn auxiliary_span(&self) -> Option<&Span>

Return an auxiliary span. This span exists only for some errors that benefit from being able to point to two locations in the original regular expression. For example, "duplicate" errors will have the main error position set to the duplicate occurrence while its auxiliary span will be set to the initial occurrence.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a copy 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 description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

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

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Error> for Error

fn from(err: Error) -> Error

Performs the conversion.

impl PartialEq<Error> for Error

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralEq for Error

impl StructuralPartialEq for Error