Enum GrammarLoweringError 

pub enum GrammarLoweringError {
    UnsupportedFormat(String),
    NoStartRule,
    Unencodable(String),
    MissingRule(String),
    Import(GrammarImportError),
    Emit(GrammarEmitError),
    Definition(GrammarRoundTripError),
}

A lowering or reconstruction that cannot be carried out.

Variants

UnsupportedFormat(String)

The format is not one of GRAMMAR_LOWERING_FORMATS.

NoStartRule

The grammar has no start rule.

Unencodable(String)

A character set holds no character the format can spell.

MissingRule(String)

The executable grammar has no rule of this name.

Import(GrammarImportError)

The importer rejected the executable or the metadata is malformed.

Emit(GrammarEmitError)

The emitter rejected the lowered grammar.

Definition(GrammarRoundTripError)

A rule definition could not be normalized for comparison.

Trait Implementations

impl Clone for GrammarLoweringError

fn clone(&self) -> GrammarLoweringError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GrammarLoweringError

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

Formats the value using the given formatter.

impl Display for GrammarLoweringError

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

Formats the value using the given formatter.

impl Eq for GrammarLoweringError

impl Error for GrammarLoweringError

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl From<GrammarEmitError> for GrammarLoweringError

fn from(error: GrammarEmitError) -> Self

Converts to this type from the input type.

impl From<GrammarImportError> for GrammarLoweringError

fn from(error: GrammarImportError) -> Self

Converts to this type from the input type.

impl From<GrammarRoundTripError> for GrammarLoweringError

fn from(error: GrammarRoundTripError) -> Self

Converts to this type from the input type.

impl PartialEq for GrammarLoweringError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for GrammarLoweringError