[TINKERPOP-2361] Prevent using GraphTraversalSource spawned traversals as children

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.10
• Fix Version/s: 3.5.0
• Component/s: process
• Labels: breaking
• Assignee: Stephen Mallette
• Reporter: Stephen Mallette
• Created: 20/Apr/20 12:43
• Updated: 11/Jun/20 16:55
• Resolved: 11/Jun/20 16:55

Description

It would be nice to prevent this:

g.V().union(identity(), g.V())

we of course want the use of an anonymous traversal here:

g.V().union(identity(), __.V())

It seems we need to enforce this less as a convention and more as a programmatic axiom.