package yqlib import ( "container/list" "fmt" yaml "gopkg.in/yaml.v3" ) func reverseOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) { results := list.New() for el := context.MatchingNodes.Front(); el != nil; el = el.Next() { candidate := el.Value.(*CandidateNode) candidateNode := unwrapDoc(candidate.Node) if candidateNode.Kind != yaml.SequenceNode { return context, fmt.Errorf("node at path [%v] is not an array (it's a %v)", candidate.GetNicePath(), candidate.GetNiceTag()) } reverseList := &yaml.Node{Kind: yaml.SequenceNode, Tag: "!!seq", Style: candidateNode.Style} reverseList.Content = make([]*yaml.Node, len(candidateNode.Content)) for i, originalNode := range candidateNode.Content { reverseList.Content[len(candidateNode.Content)-i-1] = originalNode } results.PushBack(candidate.CreateReplacementWithDocWrappers(reverseList)) } return context.ChildContext(results), nil }