Enum FieldMapError 

pub enum FieldMapError {
    Immutable,
    TooManyFields,
    TotalSizeTooBig,
    InvalidHeaderName,
}

Errors that can happen when mutating/operating on a FieldMap.

Variants

Immutable

A mutation was attempted when the map is not mutable.

TooManyFields

The map has too many fields and is not allowed to add more.

Note that this is currently a limitation inherited from http::HeaderMap.

TotalSizeTooBig

The map’s total size, of keys and values, is too large.

InvalidHeaderName

An invalid header name was attempted to be added.

Trait Implementations

impl Clone for FieldMapError

fn clone(&self) -> FieldMapError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldMapError

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

Formats the value using the given formatter.

impl Display for FieldMapError

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

Formats the value using the given formatter.

impl Error for FieldMapError

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 From<FieldMapError> for HeaderError

Available on crate feature p2 only.

fn from(err: FieldMapError) -> Self

Converts to this type from the input type.

impl From<FieldMapError> for TrappableError<HeaderError>

Available on crate feature p3 only.

fn from(e: FieldMapError) -> Self

Converts to this type from the input type.

impl From<InvalidHeaderName> for FieldMapError

fn from(_: InvalidHeaderName) -> Self

Converts to this type from the input type.

impl From<MaxSizeReached> for FieldMapError

fn from(_: MaxSizeReached) -> Self

Converts to this type from the input type.

impl PartialEq for FieldMapError

fn eq(&self, other: &FieldMapError) -> 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 FieldMapError

impl Eq for FieldMapError

impl StructuralPartialEq for FieldMapError