Enum fst_regex::Error

pub enum Error {
    Syntax(Error),
    CompiledTooBig(usize),
    TooManyStates(usize),
    NoLazy,
    NoWordBoundary,
    NoEmpty,
    NoBytes,
}

An error that occurred while compiling a regular expression.

Variants

Syntax(Error)

A problem with the syntax of a regular expression.

CompiledTooBig(usize)

Too many instructions resulting from the regular expression.

The number given is the limit that was exceeded.

TooManyStates(usize)

Too many automata states resulting from the regular expression.

This is distinct from CompiledTooBig because TooManyStates refers to the DFA construction where as CompiledTooBig refers to the NFA construction.

The number given is the limit that was exceeded.

NoLazy

Lazy quantifiers are not allowed (because they have no useful interpretation when used purely for automata intersection, as is the case in this crate).

NoWordBoundary

Word boundaries are currently not allowed.

This restriction may be lifted in the future.

NoEmpty

Empty or "zero width assertions" such as ^ or $ are currently not allowed.

This restriction may be lifted in the future.

NoBytes

Byte literals such as (?-u:\xff) are not allowed.

This restriction may be lifted in the future.

Trait Implementations

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 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 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 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.