Struct TypeError 

pub struct TypeError {
    pub span: Option<Span>,
    pub message: String,
    pub source: Option<UnifyError>,
}

A type error: a best-effort span (see ast.rs’s module doc comment — only Var/command/embed nodes carry spans, so most rules fall back to None), a “while typing …” context message, and — for anything that actually came from a failed unify call — the UnifyError itself, whose Display already renders both types involved.

Fields

span: Option<Span>

message: String

source: Option<UnifyError>

Trait Implementations

impl Debug for TypeError

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

Formats the value using the given formatter.

impl Display for TypeError

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

Formats the value using the given formatter.

impl Error for TypeError

fn source<'s>(&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 CompileError

fn from(source: TypeError) -> Self

Converts to this type from the input type.