Struct ParseError

pub struct ParseError {
    pub cause: Option<Box<dyn Error>>,
    pub rule_name: Option<&'static str>,
    pub index: usize,
}

Holds data about something that went wrong while parsing a rule.

Fields

cause: Option<Box<dyn Error>>

The underlying error that caused parsing to halt, if any.

Note that for ZST Error implementations, like those created by crate::err!, Box<dyn Error> doesn’t allocate.

rule_name: Option<&'static str>

The name of the rule that failed.

index: usize

The slice index where the rule failed to parse.

Implementations

impl ParseError

pub const fn new( cause: Option<Box<dyn Error>>, rule_name: Option<&'static str>, index: usize, ) -> Self

Creates a new instance of a parsing error.

Trait Implementations

impl Debug for ParseError

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

Formats the value using the given formatter.

impl Default for ParseError

fn default() -> ParseError

Returns the “default value” for a type.

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.