Enum CoercionError 

#[non_exhaustive]
pub enum CoercionError {
    Uncoercible {
        path: String,
        value: String,
        target: String,
        reason: String,
    },
}

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.

Uncoercible

Fields

path: String

value: String

target: String

reason: String

Implementations

impl CoercionError

pub fn args(&self) -> BTreeMap<String, Value>

The facts this error’s message interpolates. See Diagnostic::args.

Two of the four fields stay behind. path is a schema-space anchor (card_kinds.<kind>.<field>) that ERROR.md § “Three grammars, one that crosses” keeps engine-internal, and an args key would re-open that door under a new name. reason is English minted at ~20 coercion arms, sometimes wrapping a decode error’s own prose; under a key it would be interpolated into a translated sentence, so it stays in message where a consumer takes it whole or not at all.

What remains states the failure at lower resolution than the English does (“{value} is not a {target}”), which is the contract.

Trait Implementations

impl Clone for CoercionError

fn clone(&self) -> CoercionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CoercionError

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

Formats the value using the given formatter.

impl Display for CoercionError

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

Formats the value using the given formatter.

impl Eq for CoercionError

impl Error for CoercionError

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 CoercionError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CoercionError