Enum ConfigError 

pub enum ConfigError {
    NonUnicode {
        var: &'static str,
    },
    InvalidHexKey {
        var: &'static str,
        reason: HexParseReason,
    },
    InvalidBool {
        var: &'static str,
        value: String,
    },
}

Errors returned by AppConfig::from_env for malformed values.

Unset variables are NOT errors — see AppConfig::from_env for the silent-default behaviour.

Variants

NonUnicode

The variable held bytes that were not valid UTF-8.

Fields

var: &'static str

Name of the offending environment variable.

InvalidHexKey

The variable was set but did not parse as a 64-character lowercase or uppercase hex string.

Fields

var: &'static str

Name of the offending environment variable.

reason: HexParseReason

Human-readable reason (length / non-hex character).

InvalidBool

The variable was set but is not true or false (case-insensitive).

Fields

var: &'static str

Name of the offending environment variable.

value: String

The raw value that failed to parse (trimmed).

Trait Implementations

impl Clone for ConfigError

fn clone(&self) -> ConfigError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConfigError

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

Formats the value using the given formatter.

impl Display for ConfigError

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

Formats the value using the given formatter.

impl Eq for ConfigError

impl Error for ConfigError

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 PartialEq for ConfigError

fn eq(&self, other: &ConfigError) -> 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 StructuralPartialEq for ConfigError