Enum ErrorKind

#[non_exhaustive]
pub enum ErrorKind {
    UnicodeNotAllowed,
    InvalidUtf8,
    InvalidLineTerminator,
    UnicodePropertyNotFound,
    UnicodePropertyValueNotFound,
    UnicodePerlClassNotFound,
    UnicodeCaseUnavailable,
}

The type of an error that occurred while building an Hir.

This error type is marked as non_exhaustive. This means that adding a new variant is not considered a breaking change.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnicodeNotAllowed

This error occurs when a Unicode feature is used when Unicode support is disabled. For example (?-u:\pL) would trigger this error.

InvalidUtf8

This error occurs when translating a pattern that could match a byte sequence that isn’t UTF-8 and utf8 was enabled.

InvalidLineTerminator

This error occurs when one uses a non-ASCII byte for a line terminator, but where Unicode mode is enabled and UTF-8 mode is disabled.

UnicodePropertyNotFound

This occurs when an unrecognized Unicode property name could not be found.

UnicodePropertyValueNotFound

This occurs when an unrecognized Unicode property value could not be found.

UnicodePerlClassNotFound

This occurs when a Unicode-aware Perl character class (\w, \s or \d) could not be found. This can occur when the unicode-perl crate feature is not enabled.

UnicodeCaseUnavailable

This occurs when the Unicode simple case mapping tables are not available, and the regular expression required Unicode aware case insensitivity.

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> ErrorKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl PartialEq for ErrorKind

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for ErrorKind

impl StructuralPartialEq for ErrorKind