forked from mikefarah/yq
/
operator_tag.go
60 lines (46 loc) · 1.52 KB
/
operator_tag.go
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package yqlib
import (
"container/list"
)
func assignTagOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
log.Debugf("AssignTagOperator: %v")
tag := ""
if !expressionNode.Operation.UpdateAssign {
rhs, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.RHS)
if err != nil {
return Context{}, err
}
if rhs.MatchingNodes.Front() != nil {
tag = rhs.MatchingNodes.Front().Value.(*CandidateNode).Value
}
}
lhs, err := d.GetMatchingNodes(context, expressionNode.LHS)
if err != nil {
return Context{}, err
}
for el := lhs.MatchingNodes.Front(); el != nil; el = el.Next() {
candidate := el.Value.(*CandidateNode)
log.Debugf("Setting tag of : %v", candidate.GetKey())
if expressionNode.Operation.UpdateAssign {
rhs, err := d.GetMatchingNodes(context.SingleReadonlyChildContext(candidate), expressionNode.RHS)
if err != nil {
return Context{}, err
}
if rhs.MatchingNodes.Front() != nil {
tag = rhs.MatchingNodes.Front().Value.(*CandidateNode).Value
}
}
candidate.Tag = tag
}
return context, nil
}
func getTagOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
log.Debugf("GetTagOperator")
var results = list.New()
for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
candidate := el.Value.(*CandidateNode)
result := candidate.CreateReplacement(ScalarNode, "!!str", candidate.Tag)
results.PushBack(result)
}
return context.ChildContext(results), nil
}