Struct EnvVar 

pub struct EnvVar { /* private fields */ }

The environment variable an error refers to.

Errors of values and keys that come from environment variables carry this attachment. For keys that more than one variable share (like server in APP_SERVER__HOST and APP_SERVER__PORT) it’s the name up to the key (APP_SERVER). Errors that do not come from a single variable (like missing fields) have none.

use deser_env::EnvVar;

#[derive(Debug, deser::Deserialize)]
struct Config {
    server: Server,
}

#[derive(Debug, deser::Deserialize)]
#[deser(deny_unknown_fields)]
struct Server {
    port: u16,
}

let err = deser_env::from_vars::<Config, _, _, _>(
    "APP_",
    [("APP_SERVER__PROT", "80")],
)
.unwrap_err();
assert_eq!(err.message(), "unknown field `prot`, expected `port`");
assert_eq!(
    err.attachment::<EnvVar>().unwrap().name(),
    "APP_SERVER__PROT"
);

Implementations

impl EnvVar

pub fn name(&self) -> &str

Returns the name of the variable.

Trait Implementations

impl Clone for EnvVar

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EnvVar

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

Formats the value using the given formatter.

impl Eq for EnvVar

impl ErrorAttachment for EnvVar

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

Writes the attachment as part of the error message.

impl PartialEq for EnvVar

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EnvVar