Function combine::unexpected_any
source · [−]pub fn unexpected_any<Input, S, T>(message: S) -> Unexpected<Input, T, S> where
Input: Stream,
S: for<'s> ErrorInfo<'s, Input::Token, Input::Range>,
Expand description
Always fails with message
as an unexpected error.
Never consumes any input.
May have anything as the output type but must be used such that the output type can inferred.
The unexpected
parser can be used if the output type does not matter
let result = token('b').or(unexpected_any("token"))
.easy_parse("a");
assert!(result.is_err());
assert!(
result.err()
.unwrap()
.errors
.iter()
.any(|m| *m == StreamError::unexpected("token"))
);