Enum FieldError

pub enum FieldError {
    NoStaticFields,
    NoSuchStaticField,
    IndexOutOfBounds,
    NotAStruct,
}

Errors encountered when calling field_by_index or field_by_name

Variants

NoStaticFields

field_by_index was called on a dynamic collection, that has no static fields. a map doesn’t have a “first field”, it can only associate by keys.

NoSuchStaticField

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.

NotAStruct

field_by_index or field_by_name was called on a non-struct type.

Trait Implementations

impl Clone for FieldError

fn clone(&self) -> FieldError

Returns a duplicate 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

Formats the value using the given formatter.

impl Display for FieldError

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

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