Enum ParseError 

pub enum ParseError {
    EOF(Span),
    UnexpectedEOF(Span),
    ExpectedEOF(TKind, Span),
    FromLexer(LexError),
    Expected(TKind, TKind, Span),
    NotLiteral(TKind, Span),
    NotUse(TKind, Span),
    NotPattern(TKind, Prec, Span),
    NotBind(TKind, Span),
    NotPrefix(TKind, Span),
    NotInfix(TKind, Span),
    NotPostfix(TKind, Span),
}

All the ways a Parser can fail

Variants

EOF(Span)

Reached the expected end of input.

UnexpectedEOF(Span)

Unexpectedly reached end of input.

ExpectedEOF(TKind, Span)

Did not reach end of enput when expected.

FromLexer(LexError)

The Lexer didn’t like that.

Expected(TKind, TKind, Span)

Expected [TKind] 0, got [TKind] 1 at [struct@Span]

NotLiteral(TKind, Span)

Tried to parse a literal, but got [TKind] instead, at [struct@Span]

NotUse(TKind, Span)

Tried to parse a use item, but got [TKind] instead, at [struct@Span]

NotPattern(TKind, Prec, Span)

Tried to parse a pattern, but got [TKind] at PatPrec instead, at [struct@Span]

NotBind(TKind, Span)

Tried to parse a bind item, but got [TKind] instead, at [struct@Span]

NotPrefix(TKind, Span)

Tried to parse a prefix expression, but got [TKind] instead, at [struct@Span]

NotInfix(TKind, Span)

Tried to parse an infix expression, but got [TKind] instead, at [struct@Span]

NotPostfix(TKind, Span)

Tried to parse a postfix expression, but got [TKind] instead, at [struct@Span]

Trait Implementations

impl Clone for ParseError

fn clone(&self) -> ParseError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseError

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

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 PartialEq for ParseError

fn eq(&self, other: &ParseError) -> 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 Copy for ParseError

impl Eq for ParseError

impl StructuralPartialEq for ParseError