Struct shellexpand::LookupError

pub struct LookupError<E> {
    pub var_name: String,
    pub cause: E,
}

Represents a variable lookup error.

This error is returned by env_with_context() function (and, therefore, also by env(), full_with_context() and full()) when the provided context function returns an error. The original error is provided in the cause field, while name contains the name of a variable whose expansion caused the error.

Fields

var_name: String

The name of the problematic variable inside the input string.

cause: E

The original error returned by the context function.

Trait Implementations

impl<E: Clone> Clone for LookupError<E>

fn clone(&self) -> LookupError<E>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<E: Debug> Debug for LookupError<E>

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

Formats the value using the given formatter.

impl<E: Display> Display for LookupError<E>

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

Formats the value using the given formatter.

impl<E: Eq> Eq for LookupError<E>

impl<E: Error + 'static> Error for LookupError<E>

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

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

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

fn description(&self) -> &str

Deprecated since 1.41.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl<E: PartialEq> PartialEq<LookupError<E>> for LookupError<E>

fn eq(&self, other: &LookupError<E>) -> bool

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

fn ne(&self, other: &LookupError<E>) -> bool

This method tests for !=.

impl<E> StructuralEq for LookupError<E>

impl<E> StructuralPartialEq for LookupError<E>