Enum TypeError 

#[non_exhaustive]
pub enum TypeError {
    UnboundVariable(String),
    TypeMismatch {
        expected: ExprType,
        got: ExprType,
    },
    CannotInfer,
}

Errors from type inference.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnboundVariable(String)

A variable was not found in the type environment.

TypeMismatch

An expression produced a type that does not match the expected type.

Fields

expected: ExprType

The type that was expected.

got: ExprType

The type that was inferred.

CannotInfer

The type of an expression could not be determined.

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, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for TypeError

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.