Function conch_runtime::eval::default [−] [src]

pub fn default<P: ?Sized, W, E: ?Sized>(
    strict: bool, 
    param: &P, 
    default: Option<W>, 
    env: &E, 
    cfg: TildeExpansion
) -> EvalDefault<W::EvalResult, W::EvalFuture> where
    P: ParamEval<E, EvalResult = W::EvalResult>,
    W: WordEval<E>,

Constructs future representing a Default 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, default will be evaluated using cfg and that response yielded.

Note: field splitting will neither be done on the parameter, nor the default word.