Trait arg_combinators::arg::Arg

pub trait Arg {
    type Item;
    type Error: Debug + Display;
    fn update_switches<S: Switches>(&self, switches: &mut S);
    fn name(&self) -> String;
    fn get(&self, matches: &Matches) -> Result<Self::Item, Self::Error>;

    fn validate(&self) -> Option<Invalid> { ... }
    fn parse<I>(
        &self, 
        args: I
    ) -> (Result<Self::Item, TopLevelError<Self::Error>>, Usage)
    where
        I: IntoIterator,
        I::Item: AsRef<OsStr>,
    { ... }
    fn parse_env(
        &self, 
        program_name: ProgramName
    ) -> (Result<Self::Item, TopLevelError<Self::Error>>, UsageWithProgramName) { ... }
    fn parse_env_default(
        &self
    ) -> (Result<Self::Item, TopLevelError<Self::Error>>, UsageWithProgramName) { ... }
    fn just_parse<I>(
        &self, 
        args: I
    ) -> Result<Self::Item, TopLevelError<Self::Error>>
    where
        I: IntoIterator,
        I::Item: AsRef<OsStr>,
    { ... }
    fn just_parse_env(
        &self, 
        program_name: ProgramName
    ) -> Result<Self::Item, TopLevelError<Self::Error>> { ... }
    fn just_parse_env_default(
        &self
    ) -> Result<Self::Item, TopLevelError<Self::Error>> { ... }
}

Associated Types

type Item

type Error: Debug + Display

Required Methods

fn update_switches<S: Switches>(&self, switches: &mut S)

fn name(&self) -> String

fn get(&self, matches: &Matches) -> Result<Self::Item, Self::Error>

Provided Methods

fn validate(&self) -> Option<Invalid>

fn parse<I>(
    &self,
    args: I
) -> (Result<Self::Item, TopLevelError<Self::Error>>, Usage) where
    I: IntoIterator,
    I::Item: AsRef<OsStr>, 

fn parse_env(
    &self,
    program_name: ProgramName
) -> (Result<Self::Item, TopLevelError<Self::Error>>, UsageWithProgramName)

fn parse_env_default(
    &self
) -> (Result<Self::Item, TopLevelError<Self::Error>>, UsageWithProgramName)

fn just_parse<I>(
    &self,
    args: I
) -> Result<Self::Item, TopLevelError<Self::Error>> where
    I: IntoIterator,
    I::Item: AsRef<OsStr>, 

fn just_parse_env(
    &self,
    program_name: ProgramName
) -> Result<Self::Item, TopLevelError<Self::Error>>

fn just_parse_env_default(
    &self
) -> Result<Self::Item, TopLevelError<Self::Error>>

Implementors

• impl<A, D> Arg for D where     A: Arg,     D: Deref<Target = A>,  type Item = A::Item; type Error = A::Error;

• impl<T> Arg for Value<T> where     T: Clone,  type Item = T; type Error = Never;

• impl Arg for Flag type Item = bool; type Error = Never;

• impl Arg for Opt type Item = Option<String>; type Error = Never;

• impl Arg for MultiFlag type Item = usize; type Error = Never;

• impl Arg for MultiOpt type Item = Vec<String>; type Error = Never;

• impl Arg for Free type Item = Vec<String>; type Error = Never;

• impl<A> Arg for ArgExt<A> where     A: Arg,  type Item = A::Item; type Error = A::Error;

• impl<A> Arg for Valid<A> where     A: Arg,  type Item = A::Item; type Error = ValidError<A::Error>;