Enum MatchError 

pub enum MatchError {
    DuplicatedArgument(Identifier),
    ParameterNotDefined(Identifier),
    PositionalArgumentTypeMismatch(Identifier, Type, Type),
    MissingParameter(Identifier),
}

An error that occurred when looking for matching arguments between a call and a parameter definition.

Variants

DuplicatedArgument(Identifier)

Duplicated argument.

ParameterNotDefined(Identifier)

Occurs when a parameter was given in a call but not in the definition.

PositionalArgumentTypeMismatch(Identifier, Type, Type)

Mismatching type.

MissingParameter(Identifier)

Parameter required by definition but given in the call.

Trait Implementations

impl Debug for MatchError

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

Formats the value using the given formatter.

impl Display for MatchError

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

Formats the value using the given formatter.

impl Error for MatchError

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.