Struct lwb_parser::parser::peg::parse_error::PEGParseError

pub struct PEGParseError {
    pub span: Span,
    pub expected: Vec<Expect>,
    pub fail_left_rec: bool,
    pub fail_loop: bool,
}

A parsing error represents a single error that occurred during parsing. The parsing error occurs at a certain position in a file, represented by the span. The parsing error consists of multiple ParseErrorSub, which each represent a single thing that went wrong at this position.

Fields

span: Span

expected: Vec<Expect>

fail_left_rec: bool

fail_loop: bool

Implementations

impl PEGParseError

pub fn expect(span: Span, expect: Expect) -> Self

pub fn fail_left_recursion(span: Span) -> Self

pub fn fail_loop(span: Span) -> Self

impl PEGParseError

pub fn combine(self, other: PEGParseError) -> PEGParseError

Combine multiple parse errors. When one has precedence over another, the highest precedence error is kept and the other is discarded.

Highest precedence is defined as furthest starting position for now. This might be changed later.

pub fn combine_option_parse_error(
    a: Option<PEGParseError>,
    b: Option<PEGParseError>
) -> Option<PEGParseError>

A helper that combines optional parse errors, and returns an optional parse error if either exists. If both exist, use ParseError::combine to combine the errors.

Trait Implementations

impl Clone for PEGParseError

fn clone(&self) -> PEGParseError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PEGParseError

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

Formats the value using the given formatter.

impl Diagnostic for PEGParseError

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

Diagnostic severity. This may be used by [ReportHandler]s to change the display format of this diagnostic.

If None, reporters should treat this as Severity::Error

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

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

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

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

fn code(&'a self) -> Option<Box<dyn Display + 'a, Global>>

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

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 self) -> Option<Box<dyn Display + 'a, Global>>

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

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

Additional related Diagnostics.

impl Display for PEGParseError

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

Formats the value using the given formatter.

impl Error for PEGParseError

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

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

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