thoughts

pkg/yqlib/operator_multiply.go

@@ -74,9 +74,10 @@ func multiply(preferences multiplyPreferences) func(d *dataTreeNavigator, lhs *C
 				return nil, err
 			}
 			return mergeObjects(d, newThing, rhs, preferences)
-		} else if lhs.Node.Tag == "!!int" && rhs.Node.Tag == "!!int" {
-			return lhs.CreateChild(nil, &yaml.Node{Kind: yaml.ScalarNode, Tag: "!!str", Value: "12"}), nil
 		}
+		// else if lhs.Node.Tag == "!!int" && rhs.Node.Tag == "!!int" {
+		// 	return lhs.CreateChild(nil, &yaml.Node{Kind: yaml.ScalarNode, Tag: "!!str", Value: "12"}), nil
+		// }
 		return nil, fmt.Errorf("Cannot multiply %v with %v", lhs.Node.Tag, rhs.Node.Tag)
 	}
 }

pkg/yqlib/operator_multiply_test.go

@@ -4,6 +4,14 @@ import (
 	"testing"
 )
 
+// crossfunction:
+// normal single document, treat each match separately: eval
+// multiple documents, how do you do things between docs??? eval-all
+// alternative
+// collect and filter matches according to doc before running expression
+// d0a d1a d0b d1b
+// run it for (d0a d1a) x (d0b d1b) - noting that we dont do (d0a x d1a) nor (d0b d1b)
+// I think this will work for eval-all correctly then..
 var multiplyOperatorScenarios = []expressionScenario{
 	{
 		skipDoc:    true,
@@ -13,6 +21,15 @@ var multiplyOperatorScenarios = []expressionScenario{
 			"D0, P[], (!!map)::{a: {also: me}, b: {also: me}}\n",
 		},
 	},
+	{
+		skipDoc:    true,
+		document:   `a: {also: [1]}`,
+		document2:  `b: {also: me}`,
+		expression: `. * {"a" : .b}`,
+		expected: []string{
+			"D0, P[], (!!map)::{a: {also: me}, b: {also: me}}\n",
+		},
+	},
 	{
 		skipDoc:    true,
 		expression: `{} * {"cat":"dog"}`,