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https://issues.apache.org/jira/browse/FELIX-1493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Derek Baum reassigned FELIX-1493:
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Assignee: Derek Baum
> [gogo] automatic expansion of $args in Closure stops direct access to $args
> list
> --------------------------------------------------------------------------------
>
> Key: FELIX-1493
> URL: https://issues.apache.org/jira/browse/FELIX-1493
> Project: Felix
> Issue Type: Bug
> Components: Gogo
> Reporter: Derek Baum
> Assignee: Derek Baum
>
> individual arguments to Closures can be accessed as $0, $1, $2
> all arguments can be accessed as the List $args.
> > x = { echo hello $args }
> > x a b
> used to produce:
> hello [a b]
> because the $args List was passed directly as a single argument to echo.
> This is not desirable in most cases, so the parser was changed to expand
> $args in Closures by expanding the $args List,
> thus producing:
> hello a b
> Unfortunately, this also broke the ability for a closure to access the $args
> list directly:
> % loop = { each $args { echo arg is $it }}
> % loop a b
> IllegalArgumentException: Cannot coerce each[1, 2, 3,
> org.apache.felix.gogo.runtime.shell.clos...@b1deea] to any of
> [(CommandSession, Collection, Function)]
> A simple fix would be to introduce an alternative Closure variable name e.g.
> argv that is NOT expanded, but remains as a list:
> % loop = { each $argv { echo arg is $it }}
> % loop a b
> arg is a
> arg is b
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