pub enum VarError { NotPresent, NotUnicode(OsString), }
The error type for operations interacting with environment variables. Possibly returned from the env::var function.
NotPresentThe specified environment variable was not present in the current process's environment.
NotUnicode(OsString)The specified environment variable was found, but it did not contain valid unicode data. The found data is returned as a payload of this variant.
impl Error for VarError[src]
fn description(&self) -> &str[src]
fn cause(&self) -> Option<&dyn Error>[src]
The lower-level cause of this error, if any. Read more
fn source(&self) -> Option<&(dyn Error + 'static)>[src]1.30.0
The lower-level source of this error, if any. Read more
impl PartialEq<VarError> for VarError[src]
impl Eq for VarError[src]
impl Display for VarError[src]
impl Debug for VarError[src]
impl Clone for VarError[src]
impl UnwindSafe for VarErrorimpl RefUnwindSafe for VarErrorimpl Unpin for VarErrorimpl Send for VarErrorimpl Sync for VarErrorimpl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
type Error = InfallibleThe type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
impl<T> From<T> for T[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
type Error = <U as TryFrom<T>>::ErrorThe type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]
fn borrow(&self) -> &T[src]
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<'_, R: Read + ?Sized> Read for &'_ mut R
impl<'_, W: Write + ?Sized> Write for &'_ mut W
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
fn borrow_mut(&mut self) -> &mut T[src]
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized,
type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized,
type Item = <I as Iterator>::Item;
impl<'_, R: Read + ?Sized> Read for &'_ mut R
impl<'_, W: Write + ?Sized> Write for &'_ mut W
impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> ToOwned for T where
T: Clone, [src]
type Owned = TThe resulting type after obtaining ownership.
fn to_owned(&self) -> T[src]
fn clone_into(&self, target: &mut T)[src]
impl<T> ToString for T where
T: Display + ?Sized, [src]
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/env/enum.VarError.html