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EnvSource

standout_input::sources

Struct EnvSource 

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pub struct EnvSource<R: EnvReader = RealEnv> { /* private fields */ }

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impl EnvSource<RealEnv>

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pub fn new(var_name: impl Into<String>) -> Self

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impl<R: EnvReader> EnvSource<R>

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pub fn with_reader(var_name: impl Into<String>, reader: R) -> Self

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pub fn var_name(&self) -> &str

Trait Implementations§

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impl<R: Clone + EnvReader> Clone for EnvSource<R>

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fn clone(&self) -> EnvSource<R>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<R: EnvReader + 'static> InputCollector<String> for EnvSource<R>

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fn name(&self) -> &'static str

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fn is_available(&self, _matches: &ArgMatches) -> bool

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fn collect(&self, _matches: &ArgMatches) -> Result<Option<String>, InputError>

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fn bind_sources( &self, _sources: &InputSources, ) -> Option<Box<dyn InputCollector<T>>>

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fn validate(&self, _value: &T) -> Result<(), String>

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fn can_retry(&self) -> bool

Auto Trait Implementations§

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impl<R> Freeze for EnvSource<R>
where Arc<R>: Freeze,

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impl<R> RefUnwindSafe for EnvSource<R>
where Arc<R>: RefUnwindSafe,

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impl<R> Send for EnvSource<R>
where Arc<R>: Send,

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impl<R> Sync for EnvSource<R>
where Arc<R>: Sync,

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impl<R> Unpin for EnvSource<R>
where Arc<R>: Unpin,

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impl<R> UnsafeUnpin for EnvSource<R>
where Arc<R>: UnsafeUnpin,

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impl<R> UnwindSafe for EnvSource<R>
where Arc<R>: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.