Enum EnvError 

#[non_exhaustive]
pub enum EnvError {
    MissingVar {
        name: String,
    },
    MissingVarWithMessage {
        name: String,
        message: String,
    },
}

Errors produced when a required environment variable is absent.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

MissingVar

A required environment variable was not set.

Fields

name: String

Name of the missing variable.

MissingVarWithMessage

A required environment variable was not set; carries an extra explanation.

Fields

name: String

Name of the missing variable.

message: String

Human-readable explanation of why the variable is required.

Trait Implementations

impl Debug for EnvError

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

Formats the value using the given formatter.

impl Display for EnvError

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

Formats the value using the given formatter.

impl Error for EnvError

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.