Enum Error

pub enum Error {
    Lexer {
        error: Error,
        span: SourceSpan,
    },
    Expected {
        expected: Token,
        found: Option<Token>,
        span: SourceSpan,
    },
    ExpectedEither {
        first: Token,
        second: Token,
        found: Option<Token>,
        span: SourceSpan,
    },
    ExpectedMultiple {
        expected: [Option<Token>; 10],
        count: usize,
        found: Option<Token>,
        span: SourceSpan,
    },
    EmptyType {
        ty: &'static str,
        kind: &'static str,
        span: SourceSpan,
    },
    InvalidVersion {
        version: String,
        span: SourceSpan,
    },
}

Represents a parse error.

Variants

Lexer

A lexer error occurred.

Fields

error: Error

The lexer error that occurred.

span: SourceSpan

The span where the error occurred.

Expected

An unexpected token was encountered when a single token was expected.

Fields

expected: Token

The expected token.

found: Option<Token>

The found token (None for end of input).

span: SourceSpan

The span of the found token.

ExpectedEither

An unexpected token was encountered when either one of two tokens was expected.

Fields

first: Token

The first expected token.

second: Token

The second expected token.

found: Option<Token>

The found token.

span: SourceSpan

The span of the found token.

ExpectedMultiple

An unexpected token was encountered when multiple tokens were expected.

Fields

expected: [Option<Token>; 10]

The tokens that were expected.

count: usize

The count of expected tokens.

found: Option<Token>

The found token.

span: SourceSpan

The span of the found token.

EmptyType

An empty type was encountered.

Fields

ty: &'static str

The type that was empty (e.g. “record”, “variant”, etc.)

kind: &'static str

The kind of item that was empty (e.g. “field”, “case”, etc.)

span: SourceSpan

The span of the empty type.

InvalidVersion

An invalid semantic version was encountered.

Fields

version: String

The invalid version.

span: SourceSpan

The span of the version.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Diagnostic for Error

fn code(&self) -> Option<Box<dyn Display + '_>>

Unique diagnostic code that can be used to look up more information about this Diagnostic. Ideally also globally unique, and documented in the toplevel crate’s documentation for easy searching. Rust path format (foo::bar::baz) is recommended, but more classic codes like E0123 or enums will work just fine.

fn labels(&self) -> Option<Box<dyn Iterator<Item = LabeledSpan> + '_>>

Labels to apply to this Diagnostic’s Diagnostic::source_code

fn severity(&self) -> Option<Severity>

Diagnostic severity. This may be used by ReportHandlers to change the display format of this diagnostic.

fn help<'a>(&'a self) -> Option<Box<dyn Display + 'a>>

Additional help text related to this Diagnostic. Do you have any advice for the poor soul who’s just run into this issue?

fn url<'a>(&'a self) -> Option<Box<dyn Display + 'a>>

URL to visit for a more detailed explanation/help about this Diagnostic.

fn source_code(&self) -> Option<&dyn SourceCode>

Source code to apply this Diagnostic’s Diagnostic::labels to.

fn related<'a>( &'a self, ) -> Option<Box<dyn Iterator<Item = &'a dyn Diagnostic> + 'a>>

Additional related Diagnostics.

fn diagnostic_source(&self) -> Option<&dyn Diagnostic>

The cause of the error.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<(Error, SourceSpan)> for Error

fn from((e, s): (Error, SourceSpan)) -> Self

Converts to this type from the input type.