Struct InvalidToken

pub struct InvalidToken {
    pub(crate) expected: TokenKind,
    pub(crate) actual: TokenKind,
    pub(crate) span: Span,
}

An error signaling that a different kind of token was expected. Returned by the various TryFrom impls.

Fields

expected: TokenKind

actual: TokenKind

span: Span

Implementations

impl InvalidToken

pub fn to_compile_error(&self) -> TokenStream

Returns a token stream representing compile_error!("msg"); where "msg" is the output of self.to_string(). Panics if called outside of a proc-macro context!

Trait Implementations

impl Clone for InvalidToken

fn clone(&self) -> InvalidToken

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for InvalidToken

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

Formats the value using the given formatter.

impl Display for InvalidToken

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

Formats the value using the given formatter.

impl Error for InvalidToken

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 Copy for InvalidToken