mirror of https://github.com/mikefarah/yq.git
44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
package yqlib
|
|
|
|
import "container/list"
|
|
|
|
func unionOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
|
|
log.Debug("unionOperator--")
|
|
log.Debug("unionOperator: context: %v", NodesToString(context.MatchingNodes))
|
|
lhs, err := d.GetMatchingNodes(context, expressionNode.LHS)
|
|
if err != nil {
|
|
return Context{}, err
|
|
}
|
|
log.Debug("unionOperator: lhs: %v", NodesToString(lhs.MatchingNodes))
|
|
log.Debug("unionOperator: rhs input: %v", NodesToString(context.MatchingNodes))
|
|
log.Debug("unionOperator: rhs: %v", expressionNode.RHS.Operation.toString())
|
|
rhs, err := d.GetMatchingNodes(context, expressionNode.RHS)
|
|
|
|
if err != nil {
|
|
return Context{}, err
|
|
}
|
|
log.Debug("unionOperator: lhs: %v", lhs.ToString())
|
|
log.Debug("unionOperator: rhs: %v", rhs.ToString())
|
|
|
|
results := lhs.ChildContext(list.New())
|
|
for el := lhs.MatchingNodes.Front(); el != nil; el = el.Next() {
|
|
node := el.Value.(*CandidateNode)
|
|
results.MatchingNodes.PushBack(node)
|
|
}
|
|
|
|
// this can happen when both expressions modify the context
|
|
// instead of creating their own.
|
|
/// (.foo = "bar"), (.thing = "cat")
|
|
if rhs.MatchingNodes != lhs.MatchingNodes {
|
|
|
|
for el := rhs.MatchingNodes.Front(); el != nil; el = el.Next() {
|
|
node := el.Value.(*CandidateNode)
|
|
log.Debug("union operator rhs: processing %v", NodeToString(node))
|
|
|
|
results.MatchingNodes.PushBack(node)
|
|
}
|
|
}
|
|
log.Debug("union operator: all together: %v", results.ToString())
|
|
return results, nil
|
|
}
|