utils

type ExcludedLabel struct {
	Reason   string
	Fragment posrange.PositionRange
}

type Join struct {
	Src Source
}

type Source struct {
	Selector         *promParser.VectorSelector // Vector selector used for this source.
	Call             *promParser.Call           // Most outer call used inside this source.
	Aggregation      *promParser.AggregateExpr  // Most outer aggregation expression used inside this source.
	ExcludeReason    map[string]ExcludedLabel   // Reason why a label was excluded
	Operation        string
	IsDeadReason     string
	Returns          promParser.ValueType
	Joins            []Join   // Any other sources this source joins with.
	Unless           []Join   // Any other sources this source is suppressed by.
	IncludedLabels   []string // Labels that are included by filters, they will be present if exist on source series (by).
	ExcludedLabels   []string // Labels guaranteed to be excluded from the results (without).
	GuaranteedLabels []string // Labels guaranteed to be present on the results (matchers).
	Position         posrange.PositionRange
	ReturnedNumber   float64 // If AlwaysReturns=true this is the number that's returned
	Type             SourceType
	FixedLabels      bool // Labels are fixed and only allowed labels can be present.
	IsDead           bool // True if this source cannot be reached and is dead code.
	AlwaysReturns    bool // True if this source always returns results.
	KnownReturn      bool // True if we always know the return value.
	IsConditional    bool // True if this source is guarded by 'foo > 5' or other condition.
}

type SourceType int

type Visitor func(s Source)