Enum std::env::VarError

[+] Show declaration

pub enum VarError {
    NotPresent,
    NotUnicode(OsString),
}

[−] Expand description

The error type for operations interacting with environment variables. Possibly returned from the env::var function.

Variants

NotPresent

[−] Expand description

The specified environment variable was not present in the current process's environment.

NotUnicode(OsString)

[−] Expand description

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.

Trait Implementations

impl Error for VarError[+]

[+] Show hidden undocumented items

fn description(&self) -> &str[−]

This method is soft-deprecated.

fn cause(&self) -> Option<&dyn Error>[−]

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

The lower-level cause of this error, if any.

fn source(&self) -> Option<&(dyn Error + 'static)>[−]

The lower-level source of this error, if any.

impl PartialEq<VarError> for VarError[+]

[+] Show hidden undocumented items

fn eq(&self, other: &VarError) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &VarError) -> bool[−]

This method tests for !=.

impl Eq for VarError

impl Display for VarError[+]

[+] Show hidden undocumented items

fn fmt(&self, f: &mut Formatter) -> Result[−]

Formats the value using the given formatter.

impl Debug for VarError[+]

[+] Show hidden undocumented items

fn fmt(&self, f: &mut Formatter) -> Result[−]

Formats the value using the given formatter.

impl Clone for VarError[+]

[+] Show hidden undocumented items

fn clone(&self) -> VarError[−]

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.