parse

type Field struct {
	Key string

	// Order is the sort order for this field. This can be
	// "first", meaning to sort by order of first appearance;
	// "fixed", meaning to use the explicit value order in Fixed;
	// or a named sort order.
	Order string

	// Fixed gives the explicit value order for "fixed" ordering.
	// If a record's value is not in this list, the record should
	// be filtered out. Otherwise, values should be sorted
	// according to their order in this list.
	Fixed []string

	// KeyOff and OrderOff give the byte offsets of the key and
	// order, for error reporting.
	KeyOff, OrderOff int
}

type Filter interface {
	String() string
	// contains filtered or unexported methods
}

type FilterMatch struct {
	Key string

	// Regexp is the regular expression to match against the
	// value. This may be nil, in which case this is a literal
	// match against Lit.
	Regexp *regexp.Regexp
	// Lit is the literal value to match against the value if Regexp
	// is nil.
	Lit string

	// Off is the byte offset of the key in the original query,
	// for error reporting.
	Off int
}

type FilterOp struct {
	Op    Op
	Exprs []Filter
}

type Op int

type SyntaxError struct {
	Query string // The original query string
	Off   int    // Byte offset of the error in Query
	Msg   string // Error message
}