Struct structural::field::errors::FailedAccess

pub struct FailedAccess;

The error type for accesses to fields that may not exist,most often inside an enum.

This is used as the Err associated type for Rev*Field* implementors, which return a Result<_,FailedAccess>, then StructuralExt methods use NormalizeFields to turn Ok(foo) into Some(foo),and Err(FailedAccess) into None.

Trait Implementations

impl Clone for FailedAccess

fn clone(&self) -> FailedAccess

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Cloned for FailedAccess

type Cloned = Self

The type of this with owned values instead of references to them.

fn cloned_(&self) -> Self

Clones a tuple of references into a tuple of values.

impl Copy for FailedAccess

impl Debug for FailedAccess

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

Formats the value using the given formatter.

impl Display for FailedAccess

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

Formats the value using the given formatter.

impl Eq for FailedAccess

impl Error for FailedAccess

fn description(&self) -> &str

👎 Deprecated since 1.42.0:

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<InfallibleAccess> for FailedAccess

fn from(_: InfallibleAccess) -> Self

Performs the conversion.

impl Hash for FailedAccess

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl IntoFieldErr<FailedAccess> for InfallibleAccess

fn into_field_err(self) -> FailedAccess

Performs the conversion

impl IsFieldErr for FailedAccess

impl Ord for FailedAccess

fn cmp(&self, other: &FailedAccess) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

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

Restrict a value to a certain interval.

impl PartialEq<FailedAccess> for FailedAccess

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

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

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<FailedAccess> for FailedAccess

fn partial_cmp(&self, other: &FailedAccess) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for FailedAccess

impl StructuralPartialEq for FailedAccess