Enum Code 

pub enum Code {
    Custom {
        code: String,
        severity: Severity,
    },
}

Stable, machine-readable diagnostic identifiers spanning the whole pipeline. Codes use disjoint string namespaces per layer:

• E*** - lexer errors (feature lexer)
• W*** - lexer warnings (feature lexer)
• P*** - parser errors (feature parser)
• PW*** - parser warnings (feature parser)
• T*** - transform errors (feature transform)
• TW*** - transform warnings (feature transform)
• G*** - codegen errors (feature codegen)
• GW*** - codegen warnings (feature codegen)

Custom { code, severity } is the escape hatch for third-party transformers that want to emit through the same engine without forking this enum.

Variants

Custom

Carry an arbitrary code string + explicit severity through the same engine. For third-party transformer authors who don’t want to fork this enum. Prefer adding a typed variant when contributing upstream.

Fields

code: String

severity: Severity

Trait Implementations

impl Clone for Code

fn clone(&self) -> Code

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Code

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Code

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl DiagnosticCode for Code

fn code(&self) -> &str

Stable string identifier rendered in the header (e.g. "E0001").

fn severity(&self) -> Severity

Severity inferred from this code.

fn url(&self) -> Option<&'static str>

Optional documentation URL rendered after the code in pretty mode.

impl Serialize for Code

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

where __S: Serializer,

Serialize this value into the given Serde serializer.