Function abortable_parser::combinators::must_complete

pub fn must_complete<I, O>(result: Result<I, O>, msg: String) -> Result<I, O> where
    I: InputIter, 

Turns Result::Fail or Result::Incomplete into Result::Abort.

You must specify the error message to use in case the matcher is incomplete.

The must_complete! macro provides syntactic sugar for using this combinator.