expr

var (
	// ErrMissingExpr is a parse error returned when an expression is missing.
	ErrMissingExpr = errors.New("missing expression")
	// ErrMissingComma is a parse error returned when an expression is missing a comma.
	ErrMissingComma = errors.New("missing comma")
	// ErrMissingQuote is a parse error returned when an expression is missing a quote.
	ErrMissingQuote = errors.New("missing quote")
	// ErrUnexpectedCharacter is a parse error returned when an expression contains an unexpected character.
	ErrUnexpectedCharacter = errors.New("unexpected character")
)

var (
	// ErrBadType is an eval error returned when a argument has wrong type.
	ErrBadType = errors.New("bad type")
	// ErrMissingArgument is an eval error returned when a argument is missing.
	ErrMissingArgument = errors.New("missing argument")
	// ErrMissingTimeseries is an eval error returned when a time series argument is missing.
	ErrMissingTimeseries = errors.New("missing time series argument")
	// ErrSeriesDoesNotExist is an eval error returned when a requested time series argument does not exist.
	ErrSeriesDoesNotExist = errors.New("no timeseries with that name")
)

var (
	// ErrWildcardNotAllowed is an eval error returned when a wildcard/glob argument is found where a single series is required.
	ErrWildcardNotAllowed = errors.New("found wildcard where series expected")
	// ErrTooManyArguments is an eval error returned when too many arguments are provided.
	ErrTooManyArguments = errors.New("too many arguments")
)