filter

type Clause struct {
	PrevLogical string
	Not         bool
	Field       string
	Operator    string
	Value       string
}

type ClauseSet struct {
	Clauses []Clause
	Ops     OperatorSet

	ParseInt    func(Clause) (int64, error)
	ParseUint   func(Clause) (uint64, error)
	ParseString func(Clause) (string, error)
	ParseBool   func(Clause) (bool, error)
	ParseRegexp func(Clause) (*regexp.Regexp, error)
}

type OperatorSet struct {
	And       string
	Or        string
	Equals    string
	NotEquals string

	GreaterThan  string
	LessThan     string
	GreaterEqual string
	LessEqual    string

	Negate string
	Quote  []string
}