Enum ErrorVariant

pub enum ErrorVariant<R> {
    ParsingError {
        positives: Vec<R>,
        negatives: Vec<R>,
    },
    CustomError {
        message: String,
    },
}

Different kinds of parsing errors.

Variants

ParsingError

Generated parsing error with expected and unexpected Rules

Fields

positives: Vec<R>

Positive attempts

negatives: Vec<R>

Negative attempts

CustomError

Custom error with a message

Fields

message: String

Short explanation

Implementations

impl<R: RuleType> ErrorVariant<R>

pub fn message(&self) -> Cow<'_, str>

Returns the error message for ErrorVariant

If ErrorVariant is CustomError, it returns a Cow::Borrowed reference to message. If ErrorVariant is ParsingError, a Cow::Owned containing “expected ErrorVariant::ParsingError::positives ErrorVariant::ParsingError::negatives” is returned.

Examples

let variant = ErrorVariant::<()>::CustomError {
    message: String::from("unexpected error")
};

println!("{}", variant.message());

Trait Implementations

impl<R: Clone> Clone for ErrorVariant<R>

fn clone(&self) -> ErrorVariant<R>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<R: Debug> Debug for ErrorVariant<R>

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

Formats the value using the given formatter.

impl<R: RuleType> Display for ErrorVariant<R>

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

Formats the value using the given formatter.

impl<R> Error for ErrorVariant<R>

where Self: Debug + Display,

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<R: Hash> Hash for ErrorVariant<R>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<R: PartialEq> PartialEq for ErrorVariant<R>

fn eq(&self, other: &ErrorVariant<R>) -> 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<R: Eq> Eq for ErrorVariant<R>

impl<R> StructuralPartialEq for ErrorVariant<R>