Enum DraftError 

pub enum DraftError {
    NoExemplars,
    NoCandidateFields(usize),
    CannotMatchExemplars {
        matched: usize,
        total: usize,
        floor: usize,
        failing: Vec<usize>,
    },
    ForcedFieldMismatch {
        fields: Vec<String>,
        failing: Vec<usize>,
    },
    Internal {
        stage: String,
        message: String,
    },
}

Why a draft could not be produced.

Variants

NoExemplars

No exemplar events were provided.

NoCandidateFields(usize)

No field survived profiling (all volatile, excluded, or below the prevalence threshold).

CannotMatchExemplars

Even after relaxing to the minimum-field floor the draft does not match every exemplar, so an honest rule cannot be emitted.

Fields

matched: usize

total: usize

floor: usize

failing: Vec<usize>

ForcedFieldMismatch

A field forced via include_fields is absent from some exemplars, so no draft containing it can match them. Forced fields are user intent and are never dropped by relaxation.

Fields

fields: Vec<String>

failing: Vec<usize>

Internal

The emitted YAML failed to parse or compile (a bug, surfaced honestly).

Fields

stage: String

message: String

Trait Implementations

impl Debug for DraftError

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

Formats the value using the given formatter.

impl Display for DraftError

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

Formats the value using the given formatter.

impl Error for DraftError

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.