Enum ParseError

pub enum ParseError<'a> {
    ExpectRule {
        expect: Vec<Rule>,
        found: Rule,
    },
    MissingPair {
        parent: Pair<'a, Rule>,
        expect: Vec<Rule>,
    },
}

This enum type contains errors that can occur when using a DotParser. In principle, those errors should never occur, as all parsing errors should be caught by DotParser::parse. Therefore, if such error occurs, it is a bug, probably a missing feature.

Variants

ExpectRule

This variant represents the case where we expect one of several rules, but we actually find another.

Fields

expect: Vec<Rule>

The list of accepted Rules.

found: Rule

The Rule actually found.

MissingPair

This variant represents the case where we expect a Pair but none is present.

Fields

parent: Pair<'a, Rule>

The parent pair, i.e. the one that terminates too early.

expect: Vec<Rule>

The missing pair should have one of the Rule in expect.

Trait Implementations

impl<'a> Clone for ParseError<'a>

fn clone(&self) -> ParseError<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ParseError<'a>

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

Formats the value using the given formatter.

impl Display for ParseError<'_>

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

Formats the value using the given formatter.

impl Error for ParseError<'_>

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<'a> From<ParseError<'a>> for GraphFromFileError<'a>

fn from(e: ParseError<'a>) -> Self

Converts to this type from the input type.