[−][src]Function sexpy::context
pub fn context<I, E, F, O>(context: &'static str, f: F) -> impl Fn(I) where
E: ParseError<I>,
F: Fn(I) -> Result<(I, O), Err<E>>,
I: Clone,
create a new error from an input position, a static string and an existing error. This is used mainly in the context combinator, to add user friendly information to errors when backtracking through a parse tree