Enum CompileError 

#[non_exhaustive]
pub enum CompileError {
    InnerError(BuildError),
    LookBehindNotConst,
    VariableLookBehindRequiresFeature,
    DfaBuildError(String, String),
    InvalidGroupName,
    InvalidGroupNameBackref(String),
    InvalidBackref(usize),
    NamedBackrefOnly,
    FeatureNotYetSupported(String),
    SubroutineCallTargetNotFound(String, usize),
    LeftRecursiveSubroutineCall(String),
    NeverEndingRecursion,
    PatternTooComplex,
    UnexpectedGeneralError(String),
    PatternCanNeverMatch,
    UnresolvedAstNode(usize, String),
}

An error as the result of compiling a regex.

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.

InnerError(BuildError)

Regex crate error

LookBehindNotConst

Look-behind assertion without constant size

VariableLookBehindRequiresFeature

Variable-length lookbehind requires feature flag

DfaBuildError(String, String)

Error building reverse DFA (pattern, error)

InvalidGroupName

Couldn’t parse group name

InvalidGroupNameBackref(String)

Invalid group id in escape sequence

InvalidBackref(usize)

Invalid back reference

NamedBackrefOnly

Once named groups are used you cannot refer to groups by number

FeatureNotYetSupported(String)

Feature not supported yet

SubroutineCallTargetNotFound(String, usize)

Subroutine call to non-existent group

LeftRecursiveSubroutineCall(String)

Left-recursive subroutine call detected

NeverEndingRecursion

Unbounded recursive subroutine call detected

PatternTooComplex

The compiled program exceeded the configured maximum size. Subroutine calls are inlined at compile time, so a self- or mutually-recursive pattern can expand without bound even when the recursion-depth cap is respected; this bounds the emitted VM instruction vector instead.

UnexpectedGeneralError(String)

Unexpected general error

PatternCanNeverMatch

The pattern combined with the active options can never produce a match. For example, setting find_not_empty on a pattern whose analysis shows it can only ever produce zero-length matches.

UnresolvedAstNode(usize, String)

An unresolved AST node was encountered during analysis (internal error)

Trait Implementations

impl Clone for CompileError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompileError

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

Formats the value using the given formatter.

impl Display for CompileError

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

Formats the value using the given formatter.

impl From<CompileError> for Error

fn from(compile_error: CompileError) -> Self

Converts to this type from the input type.