Added map, map_values

pkg/yqlib/operator_map.go

@@ -0,0 +1,64 @@
+package yqlib
+
+import (
+	"container/list"
+)
+
+func mapValuesOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
+
+	for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
+		candidate := el.Value.(*CandidateNode)
+		//run expression against entries
+		// splat toEntries and pipe it into Rhs
+		splatted, err := splat(d, context.SingleChildContext(candidate), traversePreferences{})
+		if err != nil {
+			return Context{}, err
+		}
+
+		assignUpdateExp := &ExpressionNode{
+			Operation: &Operation{OperationType: assignOpType, UpdateAssign: true},
+			Rhs:       expressionNode.Rhs,
+		}
+		_, err = assignUpdateOperator(d, splatted, assignUpdateExp)
+		if err != nil {
+			return Context{}, err
+		}
+
+	}
+
+	return context, nil
+}
+
+func mapOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
+
+	var results = list.New()
+
+	for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
+		candidate := el.Value.(*CandidateNode)
+		//run expression against entries
+		// splat toEntries and pipe it into Rhs
+		splatted, err := splat(d, context.SingleChildContext(candidate), traversePreferences{})
+		if err != nil {
+			return Context{}, err
+		}
+
+		result, err := d.GetMatchingNodes(splatted, expressionNode.Rhs)
+		log.Debug("expressionNode.Rhs %v", expressionNode.Rhs.Operation.OperationType)
+		log.Debug("result %v", result)
+		if err != nil {
+			return Context{}, err
+		}
+
+		selfExpression := &ExpressionNode{Operation: &Operation{OperationType: selfReferenceOpType}}
+		collected, err := collectTogether(d, result, selfExpression)
+		if err != nil {
+			return Context{}, err
+		}
+		collected.Node.Style = unwrapDoc(candidate.Node).Style
+
+		results.PushBack(collected)
+
+	}
+
+	return context.ChildContext(results), nil
+}