Trait conch_runtime::env::ArgumentsEnvironment

pub trait ArgumentsEnvironment {
    type Arg: Clone;
    fn name(&self) -> &Self::Arg;
    fn arg(&self, idx: usize) -> Option<&Self::Arg>;
    fn args_len(&self) -> usize;
    fn args(&self) -> Cow<[Self::Arg]>;
}

An interface for getting shell and function arguments.

Associated Types

type Arg: Clone

The type of arguments this environment holds.

Required Methods

fn name(&self) -> &Self::Arg

Get the name of the shell.

fn arg(&self, idx: usize) -> Option<&Self::Arg>

Get an argument at any index. Arguments are 1-indexed since the shell variable $0 refers to the shell's name. Thus the first real argument starts at index 1.

fn args_len(&self) -> usize

Get the number of current arguments, NOT including the shell name.

fn args(&self) -> Cow<[Self::Arg]>

Get all current arguments as a possibly owned slice.

Implementations on Foreign Types

impl<'a, T: ?Sized + ArgumentsEnvironment> ArgumentsEnvironment for &'a T

type Arg = T::Arg

fn name(&self) -> &Self::Arg

fn arg(&self, idx: usize) -> Option<&Self::Arg>

fn args_len(&self) -> usize

fn args(&self) -> Cow<[Self::Arg]>

impl<'a, T: ?Sized + ArgumentsEnvironment> ArgumentsEnvironment for &'a mut T

type Arg = T::Arg

fn name(&self) -> &Self::Arg

fn arg(&self, idx: usize) -> Option<&Self::Arg>

fn args_len(&self) -> usize

fn args(&self) -> Cow<[Self::Arg]>

Implementors

• impl<T: Clone> ArgumentsEnvironment for ArgsEnv<T> type Arg = T;
• impl<T: Clone> ArgumentsEnvironment for AtomicArgsEnv<T> type Arg = T;
• impl<A, IO, FD, L, V, EX, WD, N, ERR> ArgumentsEnvironment for Env<A, IO, FD, L, V, EX, WD, N, ERR> where
    A: ArgumentsEnvironment,
    A::Arg: Clone,
    N: Hash + Eq,  type Arg = A::Arg;
• impl<A, IO, FD, L, V, EX, WD, N, ERR> ArgumentsEnvironment for AtomicEnv<A, IO, FD, L, V, EX, WD, N, ERR> where
    A: ArgumentsEnvironment,
    A::Arg: Clone,
    N: Hash + Eq,  type Arg = A::Arg;