You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: operator_path.go
    path of file: ./repos/yq/pkg/yqlib
    
    the code of the file until where you have to start completion: package yqlib

import (
	"container/list"
	"fmt"
)

func createPathNodeFor(pathElement interface{}) *CandidateNode {
	switch pathElement := pathElement.(type) {
	case string:
		return &CandidateNode{Kind: ScalarNode, Value: pathElement, Tag: "!!str"}
	default:
		return &CandidateNode{Kind: ScalarNode, Value: fmt.Sprintf("%v", pathElement), Tag: "!!int"}
	}
}

func getPathArrayFromNode(funcName string, node *CandidateNode) ([]interface{}, error) {
	if node.Kind != SequenceNode {
		return nil, fmt.Errorf("%v: expected path array, but got %v instead", funcName, node.Tag)
	}

	path := make([]interface{}, len(node.Content))

	for i, childNode := range node.Content {
		if childNode.Tag == "!!str" {
			path[i] = childNode.Value
		} else if childNode.Tag == "!!int" {
			number, err := parseInt(childNode.Value)
			if err != nil {
				return nil, fmt.Errorf("%v: could not parse %v as an int: %w", funcName, childNode.Value, err)
			}
			path[i] = number
		} else {
			return nil, fmt.Errorf("%v: expected either a !!str or !!int in the path, found %v instead", funcName, childNode.Tag)
		}

	}
	return path, nil
}

// SETPATH(pathArray; value)
func setPathOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
	log.Debugf("SetPath")

	if expressionNode.RHS.Operation.OperationType != blockOpType {
		return Context{}, fmt.Errorf("SETPATH must be given a block (;), got %v instead", expressionNode.RHS.Operation.OperationType.Type)
	}

	lhsPathContext, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.RHS.LHS)

	if err != nil {
		return Context{}, err
	}

	if lhsPathContext.MatchingNodes.Len() != 1 {
		return Context{}, fmt.Errorf("SETPATH: expect
    
func setPathOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
	log.Debugf("SetPath")

	if expressionNode.RHS.Operation.OperationType != blockOpType {
		return Context{}, fmt.Errorf("SETPATH must be given a block (;), got %v instead", expressionNode.RHS.Operation.OperationType.Type)
	}

	lhsPathContext, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.RHS.LHS)

	if err != nil {
		return Context{}, err
	}

	if lhsPathContext.MatchingNodes.Len() != 1 {
		return Context{}, fmt.Errorf("SETPATH: expected single path but found %v results instead", lhsPathContext.MatchingNodes.Len())
	}
	lhsValue := lhsPathContext.MatchingNodes.Front().Value.(*CandidateNode)

	lhsPath, err := getPathArrayFromNode("SETPATH", lhsValue)

	if err != nil {
		return Context{}, err
	}

	lhsTraversalTree := createTraversalTree(lhsPath, traversePreferences{}, false)

	assignmentOp := &Operation{OperationType: assignOpType}

	for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
		candidate := el.Value.(*CandidateNode)

		targetContextValue, err := d.GetMatchingNodes(context.SingleReadonlyChildContext(candidate), expressionNode.RHS.RHS)
		if err != nil {
			return Context{}, err
		}

		if targetContextValue.MatchingNodes.Len() != 1 {
			return Context{}, fmt.Errorf("SETPATH: expected single value on RHS but found %v", targetContextValue.MatchingNodes.Len())
		}

		rhsOp := &Operation{OperationType: referenceOpType, CandidateNode: targetContextValue.MatchingNodes.Front().Value.(*CandidateNode)}

		assignmentOpNode := &ExpressionNode{
			Operation: assignmentOp,
			LHS:       lhsTraversalTree,
			RHS:       &ExpressionNode{Operation: rhsOp},
		}

		_, err = d.GetMatchingNodes(context.SingleChildContext(candidate), assignmentOpNode)

		if err != nil {
			return Context{}, err
		}

	}
	return context, nil
}