Function conch_runtime::eval::error

pub fn error<P: ?Sized, W, E: ?Sized>(
    strict: bool, 
    param: &P, 
    error: Option<W>, 
    env: &E, 
    cfg: TildeExpansion
) -> Error<P::EvalResult, W::EvalFuture> where
    P: ParamEval<E> + Display,
    W: WordEval<E>, 

Constructs future representing a Error parameter substitution evaluation.

First, param will be evaluated and returned as is as long as the result is non-empty, or if the result is defined-but-empty and strict = false.

Otherwise, error will be evaluated using cfg, and the result will populate an ExpansionError::EmptyParameter.

Note: field splitting will neither be done on the parameter, nor the error message.