Trait env_extractor::CanExtractOptional

pub trait CanExtractOptional<A> {
    type Err;
    fn get_optional(&self) -> Result<A, Self::Err>;
}

Associated Types

type Err

Loading content...

Required methods

fn get_optional(&self) -> Result<A, Self::Err>

Loading content...

Implementors

impl<A: FromStr> CanExtractOptional<Option<A>> for SingleValue where
    <A as FromStr>::Err: Debug, 

type Err = Error<<A as FromStr>::Err>

fn get_optional(&self) -> Result<Option<A>, Self::Err>

Loading content...