Enum regex::Error

pub enum Error {
    Syntax(String),
    CompiledTooBig(usize),
    // some variants omitted
}

An error that occurred during parsing or compiling a regular expression.

Variants

Syntax(String)

A syntax error.

CompiledTooBig(usize)

The compiled program exceeded the set size limit. The argument is the size limit imposed by RegexBuilder::size_limit. Even when not configured explicitly, it defaults to a reasonable limit.

If you’re getting this error, it occurred because your regex has been compiled to an intermediate state that is too big. It is important to note that exceeding this limit does not mean the regex is too big to work, but rather, the regex is big enough that it may wind up being surprisingly slow when used in a search. In other words, this error is meant to be a practical heuristic for avoiding a performance footgun, and especially so for the case where the regex pattern is coming from an untrusted source.

There are generally two ways to move forward if you hit this error. The first is to find some way to use a smaller regex. The second is to increase the size limit via RegexBuilder::size_limit. However, if your regex pattern is not from a trusted source, then neither of these approaches may be appropriate. Instead, you’ll have to determine just how big of a regex you want to allow.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a copy of the value.

const 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 Error for Error

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

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

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

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

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide(&'a self, demand: &mut Demand<'a>)

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

Provides type based access to context intended for error reports.

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 ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Error