Enum std::env::VarError

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

Possible errors from the env::var method.

Variants

NotPresent

The 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.

Trait Implementations

impl Display for VarError

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

Formats the value using the given formatter.

impl Error for VarError

fn description(&self) -> &str

A short description of the error.

fn cause(&self) -> Option<&Error>

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

Derived Implementations

impl Clone for VarError

fn clone(&self) -> VarError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Eq for VarError

impl PartialEq for VarError

fn eq(&self, __arg_0: &VarError) -> bool

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

fn ne(&self, __arg_0: &VarError) -> bool

This method tests for !=.

impl Debug for VarError

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.