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https://issues.apache.org/jira/browse/GROOVY-7428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14549340#comment-14549340
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ASF GitHub Bot commented on GROOVY-7428:
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GitHub user paulk-asert opened a pull request:
https://github.com/apache/incubator-groovy/pull/18
GROOVY-7428: Change precedence priority of ** compared to pre/post in…
…c/dec and unary plus/minus
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/paulk-asert/incubator-groovy groovy7428
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-groovy/pull/18.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18
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commit a0afb0e814bdaec656fa48e53d417b0bb7051348
Author: Paul King <pa...@asert.com.au>
Date: 2015-05-18T22:04:34Z
GROOVY-7428: Change precedence priority of ** compared to pre/post inc/dec
and unary plus/minus
----
> Change precedence priority of ** compared to pre/post inc/dec and unary
> plus/minus
> ----------------------------------------------------------------------------------
>
> Key: GROOVY-7428
> URL: https://issues.apache.org/jira/browse/GROOVY-7428
> Project: Groovy
> Issue Type: Improvement
> Reporter: Paul King
> Labels: breaking
>
> Currently the precedence order is:
> {noformat}
> level 1: post inc/dec
> level 2: power
> level 3: pre inc/dec
> {noformat}
> The original intention, I believe, was always:
> {noformat}
> level 1: post inc/dec
> level 2: pre inc/dec
> level 3: power
> {noformat}
> This leads to some unintuitive behavior:
> while these are the same:
> {code}
> println (-9 + 2) // -7
> println ((-9) + 2) // -7
> {code}
> these are different:
> {code}
> println (-9 ** 2) // -81 actually: println (-(9 ** 2))
> println ((-9) ** 2) // 81
> {code}
> Similar anomalies occur between {{**}} and {{++}}/{{--}}
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