Struct Diagnostic 

pub struct Diagnostic {
    pub diagnostic_id: String,
    pub severity: Severity,
    pub location: Location,
    pub expected: Option<TypeWitness>,
    pub found: Option<TypeWitness>,
    pub message: String,
    pub fixes: Vec<SuggestedFix>,
    pub context_window: Option<ContextWindow>,
    pub rule: Option<String>,
    pub notes: Vec<DiagnosticNote>,
}

The canonical LSDS diagnostic.

JSON shape matches ADR-006 §9.2. Field names are part of the public wire format; see crate-level docs for the stability contract.

Fields

diagnostic_id: String

Stable diagnostic identifier — e.g. "B0013", "E0100". The scheme matches the existing BorrowErrorCode (B-series for borrow / lifetime / aliasing) and ErrorCode (E-series for type, parse, semantic) namespaces.

severity: Severity

Severity bucket.

location: Location

Primary source location.

expected: Option<TypeWitness>

Expected type at this site, when applicable. None for non-type-related diagnostics (e.g. parse errors).

found: Option<TypeWitness>

Found type at this site, when applicable.

message: String

Human-readable message body (does NOT include the [B00XX] prefix — that’s the diagnostic_id field’s job; renderers prepend it on output).

fixes: Vec<SuggestedFix>

Ranked suggested fixes; may be empty.

context_window: Option<ContextWindow>

Token-budgeted context window for LLM consumers.

rule: Option<String>

Citation pointing at the binding spec section that governs this diagnostic. E.g. "ADR-006-§1.1" or "ADR-005-§4".

notes: Vec<DiagnosticNote>

Auxiliary notes. Each note has its own location (e.g. “borrow originates here”) so renderers can present them as related-info callouts.

Trait Implementations

impl Clone for Diagnostic

fn clone(&self) -> Diagnostic

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Diagnostic

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Diagnostic

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Diagnostic

fn eq(&self, other: &Diagnostic) -> 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 Serialize for Diagnostic

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 Diagnostic