Enum ParserError 

pub enum ParserError<IE, DE, T>
where
    T: Token + Debug,
{
    MissingDriver,
    BadToken(T),
    ExpectedActionGoto,
    UnexpectedEndOfStream,
    Lexer(IE),
    Driver(DE),
}

Represents all possible errors that can occur during parsing.

The ParserError type is generic over three type parameters:

• IE: the input error type, representing failures originating from the lexer.
• DE: the driver error type, representing failures produced by the ParserDriver implementation.
• T: the token type, representing the fundamental input elements consumed by the parser. Must implement Token and Debug.

Each variant corresponds to a distinct failure mode. Most variants can be automatically constructed through [?] propagation via their respective From implementations.

Variants

MissingDriver

No parser driver was found.

BadToken(T)

Encountered an invalid or unexpected token.

ExpectedActionGoto

A goto action was expected but not found.

UnexpectedEndOfStream

The parser encountered an unexpected end of input.

Lexer(IE)

The input source produced an error.

Driver(DE)

The parser driver produced an error.

Trait Implementations

impl<IE: Debug, DE: Debug, T> Debug for ParserError<IE, DE, T>

where T: Token + Debug + Debug,

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

Formats the value using the given formatter.

impl<IE, DE, T> Display for ParserError<IE, DE, T>

where T: Token + Debug + Debug, IE: Display, DE: Display,

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

Formats the value using the given formatter.

impl<IE, DE, T> Error for ParserError<IE, DE, T>

where T: Token + Debug, Self: Debug + Display,

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.