Enum rand_regex::Error

pub enum Error {
    Anchor,
    Syntax(Error),
}

Error returned by Regex::compile() and Regex::with_hir().

Examples

let gen = rand_regex::Regex::compile(r"^.{4}\b.{4}$", 100);
assert_eq!(gen.err(), Some(rand_regex::Error::Anchor));

Variants

Anchor

Anchors (^, $, \A, \z) and word boundary assertions (\b, \B) are not supported.

If you really need to include anchors, please consider using rejection sampling e.g.

use rand::Rng;

// create the generator without the anchor
let gen = rand_regex::Regex::compile(r".{4}.{4}", 100).unwrap();

// later filter the sampled result using a regex with the anchor
let filter_regex = regex::Regex::new(r"^.{4}\b.{4}$").unwrap();
let _sample = rand::thread_rng()
    .sample_iter::<String, _>(&gen)
    .filter(|s| filter_regex.is_match(s))
    .next()
    .unwrap();

Syntax(Error)

The input regex has a syntax error.

Examples

let gen = rand_regex::Regex::compile(r"(", 100);
assert!(match gen {
    Err(rand_regex::Error::Syntax(_)) => true,
    _ => false,
});

Trait Implementations

impl Clone for Error

pub fn clone(&self) -> Error

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

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

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

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

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

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

pub fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Error> for Error

pub fn from(e: Error) -> Self

Performs the conversion.

impl PartialEq<Error> for Error

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

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

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

This method tests for !=.

impl StructuralEq for Error

impl StructuralPartialEq for Error