[jira] [Closed] (TINKERPOP3-628) {{as}} step should never be ignored

["Marko A. Rodriguez (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TINKERPOP3-628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marko A. Rodriguez closed TINKERPOP3-628.
-----------------------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0.GA
         Assignee: Marko A. Rodriguez

If a user tries to rename a step that has already been labeled, an {{IllegalStateException}} occurs.

{code}
gremlin> graph = TinkerFactory.createModern()
==>tinkergraph[vertices:6 edges:6]
gremlin> g = graph.traversal()
==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
gremlin> g.V().as('a').as('b').out().as('c')
The previous step has already been labeled: GraphStep([],vertex)@a
Display stack trace? [yN]
{code}

> {{as}} step should never be ignored
> -----------------------------------
>
>                 Key: TINKERPOP3-628
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP3-628
>             Project: TinkerPop 3
>          Issue Type: Bug
>          Components: process
>            Reporter: Matt Frantz
>            Assignee: Marko A. Rodriguez
>             Fix For: 3.0.0.GA
>
>
> M8 repro:
> {noformat}
> gremlin> g = TinkerFactory.createModern()
> ==>tinkergraph[vertices:6 edges:6]
> gremlin> g.traversal().V(1).as('a').as('b').select('a')
> The step with label a  does not exist
> {noformat}
> My use case involves building complex traversals that use step labels as symbolic references for certain subsets of the traversal.  It is often desirable to point several references at the same location.



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