Enum DeserializeHeadersError 

#[non_exhaustive]
pub enum DeserializeHeadersError {
    NotUtf8 {
        header: String,
    },
    Parse {
        header: String,
        expected: &'static str,
        value: String,
    },
    UnsupportedShape {
        header: String,
        kind: &'static str,
    },
    TopLevel {
        kind: &'static str,
    },
    Message(String),
}

Error of the crate-internal to_typed parse: the header map does not satisfy the typed contract.

Every variant names the offending header, so a failed extraction can be diagnosed from the error alone.

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.

NotUtf8

A header value is not valid UTF-8 while the target field expects a textual value.

Fields

header: String

The offending header name.

Parse

A header value does not parse into the target field’s type.

Fields

header: String

The offending header name.

expected: &'static str

The type the target field expects.

value: String

The value as received (lossy UTF-8).

UnsupportedShape

The target type asks for a shape header values cannot carry (a nested struct, a sequence, a non-unit enum variant).

Fields

header: String

The offending header name.

kind: &'static str

The requested shape.

TopLevel

The top-level type is not a struct or map: there is no header to read a bare scalar from.

Fields

kind: &'static str

The requested top-level shape.

Message(String)

Any other serde-reported error (a missing field, an unknown enum variant, a custom Deserialize failure).

Trait Implementations

impl Debug for DeserializeHeadersError

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

Formats the value using the given formatter.

impl Display for DeserializeHeadersError

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

Formats the value using the given formatter.

impl Error for DeserializeHeadersError

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 Error for DeserializeHeadersError

fn custom<T: Display>(msg: T) -> Self

Raised when there is general error when deserializing a type.

fn invalid_type(unexp: Unexpected<'_>, exp: &dyn Expected) -> Self

Raised when a Deserialize receives a type different from what it was expecting.

fn invalid_value(unexp: Unexpected<'_>, exp: &dyn Expected) -> Self

Raised when a Deserialize receives a value of the right type but that is wrong for some other reason.

fn invalid_length(len: usize, exp: &dyn Expected) -> Self

Raised when deserializing a sequence or map and the input data contains too many or too few elements.

fn unknown_variant(variant: &str, expected: &'static [&'static str]) -> Self

Raised when a Deserialize enum type received a variant with an unrecognized name.

fn unknown_field(field: &str, expected: &'static [&'static str]) -> Self

Raised when a Deserialize struct type received a field with an unrecognized name.

fn missing_field(field: &'static str) -> Self

Raised when a Deserialize struct type expected to receive a required field with a particular name but that field was not present in the input.

fn duplicate_field(field: &'static str) -> Self

Raised when a Deserialize struct type received more than one of the same field.