cedar_policy_core::est

Function extract_single_argument

Source 
pub fn extract_single_argument<T>(
    args: impl ExactSizeIterator<Item = T>,
    fn_name: &'static str,
    loc: &Loc,
) -> Result<T, ParseErrors>
Expand description

Return the single argument in args iterator, or return a wrong arity error if the iterator has 0 elements or more than 1 element.