Enum FromEnvErr

pub enum FromEnvErr<Inner> {
    EnvError(String, VarError),
    Empty(String),
    ParseError(Inner),
}

Error type for loading from the environment. See the FromEnv trait for more information.

Variants

EnvError(String, VarError)

The environment variable is missing.

Empty(String)

The environment variable is empty.

ParseError(Inner)

The environment variable is present, but the value could not be parsed.

Implementations

impl FromEnvErr<Infallible>

pub fn infallible_into<T>(self) -> FromEnvErr<T>

Convert the error into another error type.

impl<Inner> FromEnvErr<Inner>

pub fn from<Other>(other: FromEnvErr<Other>) -> Self

where Inner: From<Other>,

Create a new error from another error type.

pub fn map<New>(self, f: impl FnOnce(Inner) -> New) -> FromEnvErr<New>

Map the error to another type. This is useful for converting the error type to a different type, while keeping the other error information intact.

pub fn env_err(var: &str, e: VarError) -> Self

Missing env var.

pub fn empty(var: &str) -> Self

Empty env var.

pub const fn parse_error(err: Inner) -> Self

Error while parsing.

Trait Implementations

impl<Inner: Clone> Clone for FromEnvErr<Inner>

fn clone(&self) -> FromEnvErr<Inner>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Inner: Debug> Debug for FromEnvErr<Inner>

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

Formats the value using the given formatter.

impl<Inner> Display for FromEnvErr<Inner>

where Inner: Display,

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Inner> Error for FromEnvErr<Inner>

where Inner: Error + 'static, Self: Debug + Display,

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

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

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl<Inner> From<Inner> for FromEnvErr<Inner>

fn from(source: Inner) -> Self

Converts to this type from the input type.

impl<Inner: PartialEq> PartialEq for FromEnvErr<Inner>

fn eq(&self, other: &FromEnvErr<Inner>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<Inner: Eq> Eq for FromEnvErr<Inner>

impl<Inner> StructuralPartialEq for FromEnvErr<Inner>