Struct KernelRefusal 

pub struct KernelRefusal {
    pub class: RefusalClass,
    pub stage: KernelStage,
    pub message: String,
}

A kernel REFUSAL: the fail-safe contract’s carrier. The kernel never degrades a result; where it cannot certify one it refuses, and this is the refusal — a closed RefusalClass that consumers dispatch on (the boolean’s perturbation-retry gate, the CI baseline’s per-class diff), the stage that minted it, and the human text, which Display prints verbatim so every message a user or a test saw before typing is unchanged.

There is deliberately no From<String> for this type: a refusal is minted at its origin with a class, never re-derived from prose. The only string conversion is the lossy exit (From<KernelRefusal> for String) that stringly callers above the boolean stack still use; those callers are retired stack by stack (offset/fillet/heal, then the feature pipeline).

Fields

class: RefusalClass

stage: KernelStage

message: String

The human text, verbatim. Display prints exactly this.

Implementations

impl KernelRefusal

pub fn new( class: RefusalClass, stage: KernelStage, message: impl Into<String>, ) -> Self

pub fn internal( stage: KernelStage, what: impl Into<String>, message: impl Into<String>, ) -> Self

An internal consistency failure. what is a short stable slug (the check that tripped), the message the full text.

pub fn input( stage: KernelStage, what: impl Into<String>, message: impl Into<String>, ) -> Self

A caller error.

pub fn unsupported( stage: KernelStage, what: impl Into<String>, message: impl Into<String>, ) -> Self

A named deferral.

pub fn non_convergence( stage: KernelStage, what: impl Into<String>, message: impl Into<String>, ) -> Self

An iterative lane that ran out of budget.

pub fn with_message(self, f: impl FnOnce(&str) -> String) -> Self

The same refusal with its message rewritten by f — the way a wrapping site adds context (“assembly failed: …”) WITHOUT changing the class, so an inner degeneracy stays retry-eligible through every wrapper exactly as the substring matcher saw it in the wrapped text.

Trait Implementations

impl Clone for KernelRefusal

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KernelRefusal

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for KernelRefusal

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for KernelRefusal

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

Formats the value using the given formatter.

impl Error for KernelRefusal

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<KernelRefusal> for String

The lossy exit for stringly callers: the class is dropped, the text kept. Legal only ABOVE the typed stacks (never inside csg/ or the healing modules that mint refusals); each stack that adopts KernelRefusal removes its uses.

fn from(refusal: KernelRefusal) -> Self

Converts to this type from the input type.

impl PartialEq for KernelRefusal

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for KernelRefusal

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for KernelRefusal