# Enum fst::RegexError [−] [src]

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

An error that occurred while compiling a regular expression.

## Variants

A problem with the syntax of a regular expression.

Too many instructions resulting from the regular expression.

The number given is the limit that was exceeded.

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.

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

Word boundaries are currently not allowed.

This restriction may be lifted in the future.

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

This restriction may be lifted in the future.

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

This restriction may be lifted in the future.

## Trait Implementations

### `impl Debug for Error`[src]

#### `fn fmt(&self, __arg_0: &mut Formatter) -> Result`

Formats the value using the given formatter.

### `impl From<Error> for Error`[src]

#### `fn from(err: Error) -> Error`

Performs the conversion.

### `impl Display for Error`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`

Formats the value using the given formatter.

### `impl Error for Error`[src]

#### `fn description(&self) -> &str`

A short description of the error. Read more

#### `fn cause(&self) -> Option<&Error>`

The lower-level cause of this error, if any. Read more