Enum FieldError

#[non_exhaustive]
pub enum FieldError {
    NoSuchField,
    IndexOutOfBounds,
    TypeMismatch {
        expected: &'static Shape,
        actual: &'static Shape,
    },
}

Errors encountered when calling field_by_index or field_by_name

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.

NoSuchField

field_by_name was called on a struct, and there is no static field with the given key.

IndexOutOfBounds

field_by_index was called on a fixed-size collection (like a tuple, a struct, or a fixed-size array) and the index was out of bounds.

TypeMismatch

set or set_by_name was called with an mismatched type

Fields

expected: &'static Shape

the actual type of the field

actual: &'static Shape

what someone tried to write into it / read from it

Trait Implementations

impl Clone for FieldError

fn clone(&self) -> FieldError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FieldError

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

Formats the value using the given formatter.

impl Display for FieldError

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

Formats the value using the given formatter.

impl Error for FieldError

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 PartialEq for FieldError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for FieldError

impl Eq for FieldError

impl StructuralPartialEq for FieldError