Enum Error 

pub enum Error {
    Lex(LexError),
    UnexpectedEof {
        expected: &'static str,
    },
    UnexpectedToken {
        expected: &'static str,
        found: TokenKind,
        span: Span,
    },
    DuplicateEntityId {
        id: u64,
        span: Span,
    },
    MissingHeaderEntity {
        name: &'static str,
    },
    MalformedFileSchema {
        span: Span,
    },
    InvalidAttributePosition {
        span: Span,
        detail: &'static str,
    },
    NestingTooDeep {
        span: Span,
    },
}

Parse error kinds specific to the Part 21 parser.

Lexer errors are wrapped in Error::Lex; the remaining variants describe structural problems detected during parsing.

Variants

Lex(LexError)

A lexical error bubbled up from the tokenizer.

UnexpectedEof

The token stream ended before the parser expected.

Fields

expected: &'static str

UnexpectedToken

A token was found where a different kind was expected.

Fields

expected: &'static str

found: TokenKind

span: Span

DuplicateEntityId

Two entities share the same #N identifier.

Fields

id: u64

span: Span

MissingHeaderEntity

A required HEADER entity is missing.

Fields

name: &'static str

MalformedFileSchema

FILE_SCHEMA does not contain a list of strings.

Fields

span: Span

InvalidAttributePosition

An attribute appeared in an invalid position (e.g. $ inside a list).

Fields

span: Span

detail: &'static str

NestingTooDeep

A parameter is nested deeper than MAX_NESTING_DEPTH — guards against a stack overflow on adversarially deep (((…))) / A(B(C(…))) input.

Fields

span: Span

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, f: &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<LexError> for Error

fn from(err: LexError) -> Self

Converts to this type from the input type.

impl PartialEq for Error

fn eq(&self, other: &Error) -> 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 StructuralPartialEq for Error