Enum unsynn::Error

pub enum Error {
    UnexpectedToken {
        expected: &'static str,
        found: TokenTree,
    },
    UnexpectedEnd {
        expected: &'static str,
    },
    Other {
        reason: String,
    },
    Boxed(Box<dyn Error>),
}

Error type for parsing.

Variants

UnexpectedToken

Trying to parse expected but found found.

Fields

expected: &'static str

type name of what was expected

found: TokenTree

the token that was found

UnexpectedEnd

Trying to parse expected but found the end of the input.

Fields

expected: &'static str

type name of what was expected

Other

Something else failed which can be fully formatted as String.

Fields

reason: String

explanation what failed

Boxed(Box<dyn Error>)

Any other error.

Implementations

impl Error

pub fn unexpected_token<T>(found: TokenTree) -> Result<T>

Create a Result<T>::Err(Error::UnexpectedToken) error.

pub fn unexpected_end<T>() -> Result<T>

Create a Result<T>::Err(Error::UnexpectedEnd) error.

pub fn other<T>(reason: String) -> Result<T>

Create a Result<T>::Err(Error::Other) error.

pub fn boxed(err: impl Error + 'static) -> Self

Create a Error::Boxed error.

Trait Implementations

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)>

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.