AlphabeticallyByPart returns a byPartAlphabetical that will sort 'metrics' alphabetically by 'part'.

ByPart returns a byPartBase suitable for sorting 'metrics' by 'part'.

IntervalString converts a sign and string into a number of seconds.

ErrBadType is an eval error returned when a argument has wrong type.

ErrMissingArgument is an eval error returned when a argument is missing.

ErrMissingComma is a parse error returned when an expression is missing a comma.

ErrMissingExpr is a parse error returned when an expression is missing.

ErrMissingQuote is a parse error returned when an expression is missing a quote.

ErrMissingTimeseries is an eval error returned when a time series argument is missing.

ErrSeriesDoesNotExist is an eval error returned when a requested time series argument does not exist.

ErrTooManyArguments is an eval error returned when too many arguments are provided.

ErrUnexpectedCharacter is a parse error returned when an expression contains an unexpected character.

ErrWildcardNotAllowed is an eval error returned when a wildcard/glob argument is found where a single series is required.

ByName sorts metrics by name.

ByNameNatural sorts metric naturally by name.