pub enum VarError {
NotPresent,
NotUnicode(OsString),
}
Expand description
The error type for operations interacting with environment variables.
Possibly returned from env::var()
.
The specified environment variable was not present in the current
process’s environment.
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.
Tuple Fields of NotUnicode
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
Formats the value using the given formatter. Read more
👎 Deprecated since 1.42.0:
use the Display impl or to_string()
The lower-level source of this error, if any. Read more
🔬 This is a nightly-only experimental API. (
backtrace
#53487)
Returns a stack backtrace, if available, of where this error occurred. Read more
👎 Deprecated since 1.33.0:
replaced by Error::source, which can support downcasting
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
impl<T> Any for T where
T: 'static + ?Sized,
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
impl<T, U> Into<U> for T where
U: From<T>,
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
#41263)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
Converts the given value to a String
. Read more
The type returned in the event of a conversion error.
The type returned in the event of a conversion error.