Enum ExpandLookupError 

pub enum ExpandLookupError<'a> {
    Unresolved(&'a str),
    WriteFmt(Error),
}

Error returned from ExpandLookup::write_value.

The 'a lifetime is borrowed from the unresolved-name slice passed into the call. Unresolved misses are common inside chained lookups, so the error avoids allocating; the converting From impl into ExpandError is where the name finally gets copied if the miss escapes.

Variants

Unresolved(&'a str)

name is not known to this lookup.

WriteFmt(Error)

The fmt::Write sink returned an error.

Trait Implementations

impl<'a> Clone for ExpandLookupError<'a>

fn clone(&self) -> ExpandLookupError<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ExpandLookupError<'a>

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

Formats the value using the given formatter.

impl<'a> Display for ExpandLookupError<'a>

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

Formats the value using the given formatter.

impl<'a> Eq for ExpandLookupError<'a>

impl<'a> Error for ExpandLookupError<'a>

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<'a> From<Error> for ExpandLookupError<'a>

fn from(source: Error) -> Self

Converts to this type from the input type.

impl<'a> From<ExpandLookupError<'a>> for ExpandError

fn from(value: ExpandLookupError<'a>) -> Self

Converts to this type from the input type.

impl<'a> PartialEq for ExpandLookupError<'a>

fn eq(&self, other: &ExpandLookupError<'a>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<'a> StructuralPartialEq for ExpandLookupError<'a>