Struct PositionedError 

pub struct PositionedError {
    pub error: TypeError,
    pub position: Option<Position>,
}

TypeError enriched with an optional source Position (#306 slice 1) plus a rule_tag + rule_explanation (#306 slice 2). lex_types::check_program_with_positions returns a Vec<PositionedError>; the bare check_program keeps the old Vec<TypeError> shape for backwards compatibility.

Serializes as a flat JSON object: the wrapped error’s fields (kind, at_node, expected, …), the derived rule_tag + rule_explanation, and a position field when one was attached. Consumers can downcast via the error field or pattern-match on the kind tag in the JSON. The rule_tag is the stable kebab-case identifier LLM prompts should reference; the rule_explanation is a plain-language description of what the rule enforces, suitable to inline in a repair prompt.

Fields

error: TypeError

position: Option<Position>

Implementations

impl PositionedError

pub fn new(error: TypeError, position: Option<Position>) -> Self

pub fn without_position(error: TypeError) -> Self

pub fn node(&self) -> &str

Trait Implementations

impl Clone for PositionedError

fn clone(&self) -> PositionedError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PositionedError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PositionedError

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Display for PositionedError

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

Formats the value using the given formatter.

impl Error for PositionedError

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<TypeError> for PositionedError

fn from(e: TypeError) -> Self

Converts to this type from the input type.

impl Serialize for PositionedError

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.