Enum mentat::ProjectorError

pub enum ProjectorError {
    NotYetImplemented(String),
    CannotProjectImpossibleBinding(SimpleAggregationOp),
    CannotApplyAggregateOperationToTypes(SimpleAggregationOp, ValueTypeSet),
    InvalidProjection(String),
    UnboundVariable(PlainSymbol),
    NoTypeAvailableForVariable(PlainSymbol),
    UnexpectedResultsType(&'static str, &'static str),
    AmbiguousAggregates(usize, usize),
    RusqliteError(String),
    DbError(DbError),
    PullError(PullError),
}

Variants

NotYetImplemented(String)

We're just not done yet. Message that the feature is recognized but not yet implemented.

CannotProjectImpossibleBinding(SimpleAggregationOp)CannotApplyAggregateOperationToTypes(SimpleAggregationOp, ValueTypeSet)InvalidProjection(String)UnboundVariable(PlainSymbol)NoTypeAvailableForVariable(PlainSymbol)UnexpectedResultsType(&'static str, &'static str)AmbiguousAggregates(usize, usize)RusqliteError(String)DbError(DbError)PullError(PullError)

Trait Implementations

impl Fail for ProjectorError

fn cause(&self) -> Option<&(Fail + 'static)>

Returns a reference to the underlying cause of this failure, if it is an error that wraps other errors.

fn backtrace(&self) -> Option<&Backtrace>

Returns a reference to the Backtrace carried by this failure, if it carries one.

fn context<D>(self, context: D) -> Context<D> where     D: Display + Send + Sync + 'static,

Provides context for this failure.

fn compat(self) -> Compat<Self>

Wraps this failure in a compatibility wrapper that implements std::error::Error.

Important traits for Causes<'f>

impl<'f> Iterator for Causes<'f> type Item = &'f (Fail + 'static);

fn causes(&self) -> Causes

Returns a iterator over the causes of this Fail with itself as the first item and the root_cause as the final item.

fn root_cause(&self) -> &(Fail + 'static)

Returns the "root cause" of this Fail - the last value in the cause chain which does not return an underlying cause.

impl From<Error> for ProjectorError

fn from(error: Error) -> ProjectorError

Performs the conversion.

impl From<DbError> for ProjectorError

fn from(error: DbError) -> ProjectorError

Performs the conversion.

impl From<PullError> for ProjectorError

fn from(error: PullError) -> ProjectorError

Performs the conversion.

impl Display for ProjectorError

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

Formats the value using the given formatter.

impl Debug for ProjectorError

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl From<ProjectorError> for MentatError

fn from(error: ProjectorError) -> MentatError

Performs the conversion.