source

type DeadInfo struct {
	Reason   string
	Fragment posrange.PositionRange
}

type DeadLabel struct {
	Name          string
	Reason        string
	LabelReason   string
	UsageFragment posrange.PositionRange
	LabelFragment posrange.PositionRange
	Kind          DeadLabelKind
}

type DeadLabelKind uint8

type Join struct {
	MatchingLabels []string
	AddedLabels    []string
	Src            Source              // The source we're joining with.
	Op             promParser.ItemType // The binary operation used for this join.
	Depth          int                 // Zero if this is a direct join, non-zero otherwise. sum(foo * bar) would be in-direct join.
	IsOn           bool
}

type LabelPromiseType uint8

type LabelTransform struct {
	Reason   string
	Kind     LabelPromiseType
	Fragment posrange.PositionRange
}

type Operation struct {
	Node      promParser.Node
	Operation string
	Arguments []string
}

type Operations []Operation

type ReturnInfo struct {
	LogicalExpr    string
	ValuePosition  posrange.PositionRange
	ReturnedNumber float64 // If AlwaysReturns=true this is the number that's returned
	AlwaysReturns  bool    // True if this source always returns results.
	KnownReturn    bool    // True if we always know the return value.
	IsReturnBool   bool    // True if this source uses the 'bool' modifier.
}

type Source struct {
	Labels     map[string]LabelTransform `yaml:"labels,omitempty"`
	DeadInfo   *DeadInfo                 `yaml:"deadInfo,omitempty"`
	DeadLabels []DeadLabel               `yaml:"deadLabels,omitempty"`
	Returns    promParser.ValueType      `yaml:"returns"`
	Operations Operations                `yaml:"operations,omitempty"`
	// Any other sources this source joins with.
	Joins []Join `yaml:"joins,omitempty"`
	// Any other sources this source is suppressed by.
	Unless     []Unless               `yaml:"unless,omitempty"`
	UsedLabels []string               `yaml:"usedLabels,omitempty"`
	ReturnInfo ReturnInfo             `yaml:"returnInfo,omitempty"`
	Position   posrange.PositionRange `yaml:"position"`
	Type       Type                   `yaml:"type"`
	// Labels are fixed and only allowed labels can be present.
	FixedLabels bool `yaml:"fixedLabels,omitempty"`
	// True if this source is guarded by 'foo > 5' or other condition.
	IsConditional bool `yaml:"isConditional,omitempty"`
}

type Type uint8

type Unless struct {
	MatchingLabels []string
	Src            Source
	IsOn           bool
}

type Visitor func(s Source, j *Join, u *Unless)